U.S. patent application number 12/449413 was filed with the patent office on 2010-04-22 for flaky particle and cosmetic.
This patent application is currently assigned to SAKAI CHEMICAL INDUSTRY CO., LTD.. Invention is credited to Takuro Ashida, Hiroyuki Izumikawa, Keiji Ono, Hirobumi Yoshida.
Application Number | 20100098780 12/449413 |
Document ID | / |
Family ID | 39689726 |
Filed Date | 2010-04-22 |
United States Patent
Application |
20100098780 |
Kind Code |
A1 |
Ono; Keiji ; et al. |
April 22, 2010 |
FLAKY PARTICLE AND COSMETIC
Abstract
The present invention has an object to provide a flaky
particulate material giving skin an excellent smoothness, which is
free from whitening problem upon use thereof owing to its high
transparency. The present invention also has another object to
provide a cosmetic composition containing the flaky particulate
material. The present invention relates to flaky particulate
material, which has an average coefficient of friction is not more
than 0.50, and a total light transmittance is not less than 85%. A
particle in the flaky particulate material comprises a substrate
particle made of one material selected from the group consisting of
mica, a synthetic mica, sericite, talc, barium sulfate and aluminum
oxide. The present invention provides a flaky particulate material
that gives skin excellent smoothness, a natural tone, and a matt
appearance. The flaky particulate material of the present invention
gives a cosmetic composition which provides great comfort of use,
and an excellent appearance.
Inventors: |
Ono; Keiji; (Fukushima,
JP) ; Ashida; Takuro; (Fukushima, JP) ;
Izumikawa; Hiroyuki; (Fukushima, JP) ; Yoshida;
Hirobumi; (Fukushima, JP) |
Correspondence
Address: |
JORDAN AND HAMBURG LLP
122 EAST 42ND STREET, SUITE 4000
NEW YORK
NY
10168
US
|
Assignee: |
SAKAI CHEMICAL INDUSTRY CO.,
LTD.
Sakai-shi, Osaka
JP
|
Family ID: |
39689726 |
Appl. No.: |
12/449413 |
Filed: |
February 13, 2007 |
PCT Filed: |
February 13, 2007 |
PCT NO: |
PCT/JP2007/052523 |
371 Date: |
November 3, 2009 |
Current U.S.
Class: |
424/683 ;
423/327.1; 423/331; 423/554; 423/625; 424/684; 424/691;
424/709 |
Current CPC
Class: |
C01P 2004/61 20130101;
C09C 3/08 20130101; C09C 1/28 20130101; A61K 8/19 20130101; A61K
8/02 20130101; C09C 1/405 20130101; A61Q 1/02 20130101; C01P
2004/20 20130101; C09C 1/027 20130101; C01P 2004/54 20130101; A61K
8/26 20130101; A61K 2800/412 20130101; A61K 8/25 20130101; C09C
1/407 20130101 |
Class at
Publication: |
424/683 ;
424/684; 424/709; 424/691; 423/327.1; 423/331; 423/554;
423/625 |
International
Class: |
A61K 8/25 20060101
A61K008/25; A61K 8/26 20060101 A61K008/26; A61K 8/23 20060101
A61K008/23; C01B 33/26 20060101 C01B033/26; C01B 33/24 20060101
C01B033/24; C01F 11/46 20060101 C01F011/46; C01F 7/02 20060101
C01F007/02 |
Claims
1. A flaky particulate material, which has an average coefficient
of friction is not more than 0.50, and a total light transmittance
is not less than 85%.
2. The flaky particulate material according to claim 1, wherein a
particle in the flaky particulate material comprises a substrate
particle made of one material selected from the group consisting of
mica, a synthetic mica, sericite, talc, barium sulfate and aluminum
oxide.
3. The flaky particulate material according to claim 1, wherein the
particle in the flaky particulate material may preferably contain
0.1 to 15 mass % of a fatty acid metal salt that is deposited on
the substrate particle by surface treatment.
4. The flaky particulate material according to claim 1, wherein the
flaky particulate material has a reflection-intensity ratio
(0.degree./45.degree.) of not less than 0.30, said ratio
(0.degree./45.degree.) meaning a ratio: (a reflection intensity in
the condition that the light incident angle is -45.degree. and an
acceptance angle is 0.degree.)/(a reflection intensity in the
condition that the light incident angle is -45.degree. and the
acceptance angle is 45.degree.), and said ratio being measurable by
a three-dimensional variable gloss meter.
5. A cosmetic composition comprising at least one species of the
flaky particulate material as defined in claim 1.
Description
BACKGROUND OF THE INVENTION
[0001] The present invention relates to a flaky particulate
material and a cosmetic composition.
[0002] Flaky particles are excellent in adhesion to skin, and also
excellent in smoothness owing to their shapes. Thus, such flaky
particles can provide great comfort of use, and therefore, are
widely used in makeup cosmetics.
[0003] A variety of flaky particulate materials are known as such
flaky particles. Among them, particulate materials with a small
coefficient of friction provides excellent smoothness, and thus, a
cosmetic composition that provides great comfort of use can be
obtained from such flaky particulate materials. A flaky particulate
material with a particularly small coefficient of friction is, for
example, boron nitride, which is mentioned in Patent Document
1.
[0004] Boron nitride has indeed good smoothness, but it is somewhat
whitish. Thus, the boron nitride has a defect that it looks whitish
on skin upon use. For giving skin a natural tone, it is difficult
to increase a formulation amount of boron nitride in cosmetic
compositions. On the other hand, other flaky particulate materials
such as talc, mica, sericite, barium sulfate, or aluminum oxide,
are inferior to boron nitride in smoothness, although they are
superior in transparency. That is, no flaky particulate material
suitable for a cosmetic composition providing high transparency,
and sufficient smoothness comparable to boron nitride, has been
known yet in the art.
[0005] Patent Document 2 discloses a surface-treatment of boron
nitride particles with a fatty acid metal salt for improving
comfort of use, adhesion, and persistence of make up, of the
particles. However, such a surface-treatment is unsuccessful to
improve transparency of boron nitride particles, and thus, cannot
produce a flaky particulate material with both sufficient
transparency and smoothness. An alternative treatment, which
includes a surface-treatment of a pigment for a cosmetic
composition with a fatty acid metal salt, have been also known (See
Patent Document 3, for example), but the treatment is intended for
enhancing dispersibility of the pigment, or providing adhesion or
water repellency to the pigment. Thus, no report specialized in an
improvement of smoothness has been found yet in the art.
[0006] [Patent Document 1] Japanese Kohyo (Examined) Publication
S62-49247
[0007] [Patent Document 2] Japanese Kokai (Unexamined) Publication
2003-40736
[0008] [Patent Document 3] Japanese Kokai (Unexamined) Publication
S60-69011
SUMMARY OF THE INVENTION
[0009] In view of the state of the art, the present invention has
an object to provide a flaky particulate material which provides
excellent smoothness and high ability to give skin a natural tone,
and is free from a whitening problem upon use thereof. The present
invention also has another object to provide a cosmetic composition
containing this flaky particulate material.
[0010] One aspect of the present invention relates to a flaky
particulate material, which has an average coefficient of friction
of not more than 0.50, and a total light transmittance of not less
than 85%.
[0011] Preferably, a particle in the flaky particulate material
contains a base particle made of at least one material selected
from the group consisting of mica, a synthetic mica, sericite,
talc, barium sulfate and aluminum oxide.
[0012] The particle of the flaky particulate material may
preferably contain 0.1 to 15 mass % of a fatty acid metal salt that
is deposited on the substrate particle by surface treatment.
[0013] The flaky particulate material preferably has a
reflection-intensity ratio (0.degree./45.degree.) of not less than
0.30. The ratio (0.degree./45.degree.) means a ratio: (a reflection
intensity in the condition that the light incident angle is
-45.degree. and an acceptance angle is 0.degree.)/(a reflection
intensity in the condition that the light incident angle is
-45.degree. and the acceptance angle is 45.degree.), and the ratio
is measurable by a three-dimensional variable gloss meter.
[0014] Another aspect of the present invention relate to a cosmetic
composition that contains at least one species of the above flaky
particulate materials.
[0015] Hereafter, the present invention will be described in
detail.
[0016] The flaky particulate material of the present invention is
excellent in smoothness and transparency, and thus can provide
great comfort of use and excellent cosmetic finish once it is
blended in a cosmetic composition. That is, owing to high
smoothness and transparency, the flaky particulate material of the
present invention can simultaneously+give skin a natural tone,
natural cosmetic finish, and great comfort of use, which have never
been attained yet by conventional flaky particulate materials.
[0017] The flaky particulate material of the present invention is
preferably one having a high reflection-intensity ratio
(0.degree./45.degree.). A pigment with a high reflection-intensity
ratio (0.degree./45.degree.) gives skin a matt appearance, and a
cosmetic composition containing such a pigment can attain matt
finish. In this respect, characteristics of the flaky particulate
material of the present invention is different from that of boron
nitride, which is highly glossy and can not give skin a matt
appearance. For a cosmetic composition, nonglossy and matt finish
is often required. Thus, pigments that give skin a matt appearance
are highly desired.
[0018] The flaky particulate material of the present invention has
average coefficient of friction of 0.50 or less. In the description
for the present invention, an "average coefficient of friction"
means an average of coefficients of friction in 20 mm length,
measured by Friction Tester KES-SE (a product of Kato Tech. Co.,
Ltd) with a silicone rubber friction block. The larger an average
coefficient of friction of a sample is, the poorer the smoothness
of the sample is. The average coefficient of friction of over 0.50
leads to a problem of poor smoothness. The average coefficient of
friction is preferably 0.45 or less.
[0019] The flaky particulate material of the present invention has
transparency such as total light transmittance of 85% or higher.
Here, a testing sample for the total light transmittance may be
produced by kneading the flaky particulate material with liquid
paraffin SMOIL.TM. P-80 (a product of Matsumura Oil Research Corp.)
in a Hoover's muller, to prepare a 20 mass %-concentration paste,
and then forming a 25-.mu.m thin film from the paste using an
applicator. A cosmetic composition containing the flaky particulate
material of the present invention with total light transmittance of
not lower than 85% is free from whitening problem on skin upon use.
In the description for the present invention, total light
transmittance maybe measured by a haze meter HM-150 (a product of
Murakami Color Research Laboratory, Co., Ltd.) in accordance with
JIS K 7361. The total light transmittance is preferably 86.5% or
higher.
[0020] The flaky particulate material of the present invention
preferably has a reflection-intensity ratio (0.degree./45.degree.)
of not less than 0.30. Here, the reflection-intensity ratio
(0.degree./45.degree.) means a ratio: (a reflection intensity in
the condition that the light incident angle is -45.degree. and an
acceptance angle is 0.degree.)/(a reflection intensity in the
condition that the light incident angle is -45.degree. and the
acceptance angle is 45.degree.), and the ratio is measurable by a
three-dimensional variable gloss meter.
[0021] That is, the flaky particulate material of the present
invention is preferably a material with the above ratio, which
gives skin a low-glossy, matt appearance. Usually, the
reflection-intensity ratio (0.degree./45.degree.) of particles of
less than 0.30 means that the particles are shiny. Shiny particle
have smooth particulate surfaces, and smoothness thereof is
intrinsically excellent. On the other hand, when the
reflection-intensity ratio (0.degree./45.degree.) of particles is
not less than 0.30, reflection intensity (scattering reflection
intensity) is high, and the particle with such an intensity ratio
looks matt. Such particles have essentially poor smoothness because
of surface roughness. However, a particle in the flaky particulate
material of the present invention has a treated surface, which may
be treated as mentioned above, and therefore, is preferable in that
the material has both a matt appearance and excellent smoothness.
Thus, a cosmetic composition containing the flaky particulate
material gives skin a matt appearance, as well as good smoothness.
The reflection intensity at an acceptance angle of 0.degree., and
the reflection intensity at an acceptance angle of 45.degree. may
be measured as a reflection intensity to light which is incident at
an angle of -45.degree., by extending a test sample over a
material, such as a synthetic leather, with a cosmetic powder-puff
to uniformly orientate the ingredients in the test sample, and
measured by Three-dimensional auto-goniophotometer GP-200 (a
product of Murakami Color Research Laboratory, Co., Ltd.)
[0022] Furthermore, it is preferable that a particle in the flaky
particulate material has an average length of the major axis of 3
to 40 .mu.m, and the ratio: (average length of the major
axis)/(average particle thickness) of 3 to 300. If the average
length of the major axis is less than 3 .mu.m, a cosmetic
composition containing such a flaky particulate material may cause
frictional feeling when applied on skin and may have poor
smoothness. If the length of the average major axis exceeds 40
.mu.m, a cosmetic composition containing the flaky particulate
material may be granular in touch when applied on skin and may have
poor smoothness.
[0023] If the ratio: (average length of the major axis)/(average
particle thickness) is less than 3, a cosmetic composition
containing such a flaky particulate material may cause frictional
feeling when applied on skin and may have poor smoothness. If the
ratio: (average length of the major axis)/(average particle
thickness) exceeds 300, a cosmetic composition containing such a
flaky particulate material may be granular in touch when applied on
skin, and may have poor smoothness.
[0024] The average length of the major axis means an average of the
maximum diameters of 30 particles on a line that is drawn at random
in a scanning electron micrograph of powdery flakes. The average
particle thickness means an average value of the thickness of 30
particles, which is determined in a similar way.
[0025] It is preferable that a particle in the flaky particulate
material contains a substrate made of one material selected from
the group consisting of mica, synthetic mica, sericite, talc,
barium sulfate, and aluminum oxide. A substrate particle mentioned
above is excellent in transparency, and therefore, the flaky
particulate material having the above certain range of the light
transmittance can be obtained.
[0026] On the contrary, boron nitride or the like hardly provides
clear particles even with surface-treatment, although boron nitride
is excellent in surface smoothness. Thus, it is unsuitable to use
to achieve the purpose of the present invention.
[0027] A preferable flaky particulate material of the present
invention may be obtained by surface-treating a substrate particle,
which is made of one species selected from the group consisting of
the above mica, synthetic mica, sericite, talc, barium sulfate and
aluminum oxide. The preferable resultant flaky particulate material
has a reduced average coefficient of friction. An untreated mica,
synthetic mica, sericite, talc, barium sulfate or aluminum oxide
pigment has excellent transparency, but does not have such a high
smoothness as boron nitride. Therefore, the pigment may be
appropriately surface-treated, to produce a flaky particulate
material with the above properties. Treated particles have
excellent smoothness and transparency. Thus, a makeup cosmetic
composition containing such treated particles provides great
comfort of use and natural finish.
[0028] In addition, many of materials that provide a matt
appearance contain particles with poor surface smoothness or have a
broad particle distribution, and as a result, smoothness tends to
be poor. A flaky particulate material with the above properties may
be produced by appropriately surface-treating such materials.
Thus-treated particulate material has excellent smoothness,
transparency, and gives skin a matt appearance. Thus, the treated
particulate material can provide great comfort of use and natural
matte finish.
[0029] The at least one species, which are to be used as the
substrate particles, selected from the group consisting of mica,
synthetic mica, sericite, talc, barium sulfate and aluminum oxide
is not particularly limited, and any material of a cosmetically
available grade may be used. Examples of commercially-available one
include synthetic mica PDM-10S (a product of Topy industries Ltd.),
sericite FSE (a product of Sanshin Mining Ind. Co., Ltd.), sericite
SL (a product of Horie Kako, K.K.), talc Micro Ace P-2 (a product
of Nippon talc Co., Ltd.), lamellar barium sulfate.H (a product of
Sakai Chemical Industry Co., Ltd.)
[0030] The above-mentioned surface treatments are not particularly
limited, and a treatment with a fatty acid metal salt is
preferable. The fatty acid metal salt is not particularly limited,
and one having an alkyl moiety that contains more carbon atoms is
preferable, and especially, one having an alkyl moiety that
contains 12 or more carbon atoms is more preferable, in view of
pleasant feeling after application on skin, and excellent storage
stability as a cosmetic composition containing the flaky
particulate material. The fatty-acid moiety in the above fatty acid
metal salt may derived from any of saturated fatty acids such as
lauric acid, myristic acid, palmitic acid, and stearic acid;
unsaturated fatty acids such as oleic acid; branched fatty acids
such as isostearic acid. The aliphatic-acid moiety also may derived
from any of naturally-occurring fatty acids such as a coconut oil
fatty acid, tallowate, a palm oil fatty acid, palm kernel oil, and
papas oil. The above fatty acids may be used singly or in
combination of two or more of them. More preferable are laurates,
palmitates, and stearates, and the most preferable are palmitates
and stearates. The metal in the fatty acid metal salt is not
particularly limited, and preferable examples of fatty acid metal
salts include salts of a bivalent or trivalent metal. Specific
examples include calcium salts, magnesium salts, zinc salts, and
aluminum salts. Among them, calcium salts, magnesium salts, and
aluminum salts are preferable.
[0031] The treatment with a fatty acid metal salt is not
particularly limited. One non-limiting example is a method
including depositing a coating layer of a fatty acid metal salt on
the surface of substrate particles by suspending the above
substrate particles in water to prepare slurry, then adding to the
slurry an aqueous solution of a water-soluble metal salt and an
aqueous basic solution to basify the slurry, and adding dropwise an
aqueous solution of a water-soluble fatty acid salt to the
slurry.
[0032] Specifically, the treatment may be carried out in the
following manner: [0033] (1) Substrate particles are suspended in
water, then a water-soluble magnesium salt such as magnesium
chloride, magnesium sulfate, magnesium nitrate or magnesium
acetate, or a water-soluble calcium salt such as calcium chloride,
calcium nitrate or calcium acetate, is added in such an appropriate
amount that the amount of aliphatic metal salts on a treated flaky
particulate material should be 0.1 to 15% by mass, and then an
alkali is added to the resultant slurry over 30 minutes, to basify
the slurry to be within the pH range of 10 to 11. [0034] (2) The
slurry is heated to a temperature of 50.degree. C. to 80.degree.
C., and then an aqueous solution of a fatty acid salt such as
sodium, potassium, or ammonium salt is added dropwise thereto over
more than 30 minutes in such an amount that the amount of aliphatic
metal salts on a treated flaky particulate material should be 0.1
to 15% by mass, and the slurry is aged over more than 30 minutes.
[0035] (3) After aging, the pH of the slurry is adjusted to be 7 to
8 with an acid, and then the slurry was filtered. The filtered
solid matter was washed and then dried.
[0036] It is preferable to treat the above substrate particles with
a fatty acid metal salt in such an amount that the amount of
aliphatic metal salts on a treated flaky particulate material
should be 0.1 to 15% by mass of the flaky particulate material as a
treated product basis. If the amount is less than 0.1% by mass,
improvement of smoothness may be insufficient, whereas the
proportion exceeds 15% by mass, smoothness may be poor.
[0037] The present invention relates to a cosmetic composition
containing one or two or more species of the flaky particulate
materials as mentioned above. The cosmetic composition of the
present invention is particularly preferably a makeup cosmetic
composition, and specific examples thereof include base makeup
cosmetic compositions such as foundations, face powders, and makeup
bases; point makeup cosmetic compositions such as lipsticks, eye
shadows, and cheek colors. The cosmetic composition of the present
invention preferably contains 1 to 50% by mass of the flaky
particulate material.
[0038] A cosmetic composition of the present invention may
comprise, in addition to the above flaky particulate material,
another flaky particle whose average coefficient of friction and
total light transmittance are out of the above range, or a variety
of color pigment or extenders with different shapes.
[0039] The cosmetic composition of the present invention may be
used together with any color pigments, extenders, aqueous
components, and oily components.
[0040] The color pigment is not particularly limited, and examples
thereof include inorganic white pigments (for example, titanium
dioxide, zinc oxide, etc.); inorganic red pigments (for example,
iron oxide (colcothar), iron titanate, etc.); inorganic brown
pigments (for example, .gamma.-iron oxide, etc.); inorganic yellow
pigment (for example, yellow iron oxide, ocher, etc.); inorganic
black pigments (for example, black iron oxide, lower-order titanium
oxide, etc.); inorganic purple pigments for example, mango violet,
cobalt violet, etc.); inorganic green pigments (for example,
chromium oxide, chromium hydroxide, cobalt titanate, etc.);
inorganic blue or blue-like pigments (for example, ultramarine,
iron blue, etc.); pearl pigment (for example, titanium oxide-coated
mica, titanium oxide-coated bismuth oxychloride, titanium
oxide-coated talc, color titanium oxide-coated mica, bismuth
oxychloride, bismuth oxychloride, argentine, etc.); metallic powder
pigments (for example, aluminum powder, copper powder, etc.);
organic pigments such as zirconium, barium or aluminum lake (for
example, organic pigments such as red No. 201, red No. 202, red No.
204, red No. 205, red No. 220, red No. 226, red No. 228, red No.
405, orange No.203, orange No. 204, yellow No. 205, yellow No. 401,
and blue No. 404; red No. 3; red No. 104; red No. 106; red No. 227;
red No. 230; red No. 401; red No. 505; orange No. 205; yellow No.
4; yellow No. 5; yellow No. 202; yellow No. 203; green No. 3; and
blue No. 1, etc.); and natural pigments (for example, chlorophyll,
.beta.-carotene, etc.). The above extender is not particularly
limited and examples thereof include mica, synthetic mica,
sericite, talc, kaolin, calcium carbonate, magnesium carbonate,
barium sulfate, and aluminum oxide.
[0041] The above aqueous components and oily components are not
particularly limited, and the cosmetic composition of the present
invention may contain an oil, a surfactant, a moisturizer, a higher
alcohol, a sequestering agent, a natural or synthetic polymer, a
water-soluble or oil-soluble polymer, a UV absorber, one or more of
a variety of extracts, an inorganic or organic pigment, an
inorganic or organic clay mineral, an inorganic or organic pigment
which is treated with a silicone, a colorant such as an organic
dye, a preservative, an antioxidant, a coloring matter, a
thickener, a pH adjustor, a perfume, a cooling agent, an
antiperspirant, an antiseptic, or a skin activating agent.
Specifically, a desired cosmetic composition may be prepared by
blending any one, or two or more of the components mentioned below
in a conventional manner. The blending amounts of these components
are not particularly limited as long as the effects of the present
invention are not impaired.
[0042] The oil is not particularly limited, and examples thereof
include avocado oil, camellia oil, turtle oil, macadamia nut oil,
corn oil, mink oil, olive oil, rapeseed oil, egg-yolk oil, sesame
oil, persic oil, wheat germ oil, sasanqua oil, castor oil, linseed
oil, safflower oil, cottonseed oil, perilla oil, soybean oil,
arachis oil, tea seed oil, kaya oil, rice bran oil, Chinese tung
oil, Japanese tung oil, jojoba oil, germ oil, triglycerol, glyceryl
trioctanoate, glyceryl tripalmitate, cacao butter, coconut oil,
horse fat, hydrogenated coconut oil, palm oil, beef tallow, mutton
tallow, hydrogenated beef tallow, palm kernel oil, lard, beef bone
tallow, Japanese tallow-kernel oil, a hydrogenated oil, neatsfoot
oil, Japanese tallow, hydrogenated castor oil, yellow beeswax,
candelilla wax, cotton wax, carnauba wax, bayberry wax, insect wax,
spermaceti wax, montan wax, bran wax, lanolin, kapok wax, lanolin
acetate, liquid lanolin, sugarcane wax, isopropyl lanolate, hexyl
laurate, reduced lanolin, jojoba wax, hard lanolin, shellac wax,
POE lanolin alcohol ether, POE lanolin alcohol acetate, POE
cholesterol ether, polyethylene glycol lanolate, POE hydrogenated
lanolin alcohol ether, liquid paraffin, ozokerite, pristane,
paraffin, ceresin, squalene, vaseline, and microcrystalline
wax.
[0043] The lipophilic nonionic surfactant is not particularly
limited, and example thereof include sorbitan fatty acid esters
such as sorbitan monooleate, sorbitan monoisostearate, sorbitan
monolaurate, sorbitan monopalmitate, sorbitan monostearate,
sorbitan sesquioleate, sorbitan trioleate, diglycerol sorbitan
penta-2-ethylhexylate, and diglycerol sorbitan
tetra-2-ethylhexylate; glycerol fatty acid esters such as
monoglycerides of fatty acids of cottonseed oil, glyceryl
monoerucate, glyceryl sesquioleate, glyceryl monostearate,
.alpha.,.alpha.'-glyceryl oleate pyroglutamate, and glyceryl
(stearate/malate); grycerol aliphatic acid esters such as propylene
glycol monostearate; hydrogenated castor oil derivatives; and
glycerol alkyl ethers.
[0044] The hydrophilic nonionic surfactant is not particularly
limited and examples thereof include POE sorbitan fatty acid esters
such as POE sorbitan monooleate, POE-sorbitan monostearate,
POE-sorbitan monooleate, and POE-sorbitan tetra oleate; POE
sorbitol fatty acid esters such as POE-sorbitol monolaurate,
POE-sorbitol monooleate, POE-sorbitol pentaoleate, and POE-sorbitol
monostearate; POE-glycerol fatty acid esters such as POE-glycerol
monostearate, POE-glycerol monoisostearate, and POE-glycerol
triisostearate; POE fatty acid esters such as POE monooleate, POE
distearate, POE monodioleate, and ethylene glycol distearate; POE
alkyl ethers such as POE lauryl ether, POE oleyl ether, POE stearyl
ether, POE behenyl ether, POE 2-octyldodecyl ether, and POE
cholestanol ether; POE alkyl phenyl ethers such as POE octylphenyl
ether, POE nonylphenyl ether, and POE dinonylphenyl ether;
pluaronics such as pluronic; POE-POP alkyl ethers such as POE-POP
cetyl ether, POE-POP 2-decyl tetradecyl ether, POE-POP monobutyl
ether, POE-POP hydrogenated lanolin, and POE-POP glycerol ether;
tetra POE-tetra POP ethylenediamine condensates such as
Tetronic.TM.; POE castor oil- or hydrogenated castor
oil-derivatives such as POE castor oil, POE hydrogenated castor
oil, POE hydrogenated castor oil monoisostearate, POE hydrogenated
castor oil triisostearate, monopyroglutamic acid monoisostearic
acid diester and POE hydrogenated castor oil maleic acid; POE
beeswax-lanolin derivatives, such as POE sorbitol beeswax; alkanol
amides such as coconut oil-fatty acid diethanol amides, lauric acid
monoethanol amide, and fatty acid isopropanol amide; POE propylene
glycol fatty acid esters; POE alkylamines; POE fatty acid amides;
sucrose fatty acid esters, POE nonylphenyl formaldehyde
condensates; alkyl ethoxydimethylamine oxides; and trioleyl
phosphate.
[0045] Examples of other surfactants which may be blended in the
cosmetic composition include anionic surfactants such as fatty acid
soaps, higher-alkyl sulfuric-acid ester salts, triethanolamine POE
lauryl sulfate, and alkyl ether sulfuric ester salts; cationic
surfactants such as alkyl trimethylammonium salts, alkyl pyridinium
salts, alkyl quaternary ammonium salts, alkyl dimethyl benzyl
ammonium salts, POE alkyl amines, alkyl amine salts, and polyamine
fatty acid derivatives; and amphoteric surfactants such as
imidazoline amphoteric surfactants, and betain surfactants. These
surfactants may be blended in an amount such that the stability of
the cosmetic composition is maintained and problematic skin
irritation is not caused.
[0046] The moisturizer is not particularly limited, and examples
thereof include xylitol, sorbitol, maltitol, chondroitin sulfuric
acid, hyaluronic acid, mucoitin sulfuric acid, caronic acid,
atelocollagen, cholesteryl 12-hydroxystearate, sodium lactate, bile
salts, dl-pyrrolidone carboxylates, short chain soluble collagens,
diglycerol (EO) PO adducts, Rosa roxburghii extract, Yarrow
(Achillea milefolium) extract, and melilot extract.
[0047] The higher alcohol is not particularly limited, and examples
thereof include linear alcohols such as lauryl alcohol cetyl
alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl
alcohol, and cetostearyl alcohol; and branched alcohols such as
monostearyl glycerol ether (batyl alcohol), 2-decyltetradecynol,
lanolin alcohol, cholesterol, phytosterol, hexyldodecanol,
isostearyl alcohol, and octyldodecanol.
[0048] The sequestering agent is not particularly limited, and
examples thereof include 1-hydroxyethane-1,1-diphosphonic acid,
1-hydroxyethane-1,1-diphosphonic acid tetrasodium salt, sodium
citrate, sodium polyphosphate, sodium metaphosphate, gluconic acid,
phosphoric acid, citric acid, ascorbic acid, succinic acid, and
edetic acid.
[0049] A natural water-soluble polymer is not particularly limited,
and examples thereof include vegetable-derived polymers such as gum
arabic, tragacanth gum, galactan, guar gum, carob gum, karaya gum,
carrageenan, pectin, agar, quince seed (quince), algaecolloid
(algae extract), and starch (rice, corn, potato, and wheat);
microorganism-derived polymers such as xanthan gum, dextran,
succinoglucan, and pullulan; animal-derived polymers such as
collagen, casein, albumin, and gelatin.
[0050] A half-synthesized water-soluble polymer is not particularly
limited, and examples thereof include starch polymers such as
carboxymethyl starch and methyl hydroxypropyl starch; cellulose
polymers such as methyl cellulose, nitrocellulose nitrate, ethyl
cellulose, methyl hydroxypropyl cellulose, hydroxyethyl cellulose,
cellulose sodium sulfate, hydroxypropyl cellulose, carboxymethyl
cellulose sodium (CMC), crystalline cellulose, and cellulose
powder; sodium alginate, or alginate polymers such as propylene
glycol alginate.
[0051] A synthetic water-soluble polymer is not particularly
limited, and examples thereof include polyvinyl alcohol, polyvinyl
methyl ether, and polyvinyl pyrrolidone; polyoxyethylene polymers
such as polyethylene glycol 20,000, 40,000, and 60,000 grades;
copolymers such as polyoxyethylene polyoxypropylene copolymer;
acrylic polymers such as sodium polyacrylate, polyethylacrylate,
and polyacrylamide; polyethyleneimine; and cationic polymers.
[0052] A water-soluble inorganic polymer is not particularly
limited, and examples thereof include bentonite, magnesium aluminum
silicate (veegum), laponite, hectorite, and silicic anhydride.
[0053] The UV absorber is not particularly limited, and examples
thereof include benzoate UV absorbers such as p-aminobenzoic acid
(hereafter abbreviated to PABA), PABA monoglycerol ester,
N,N-dipropoxy PABA ethyl ester, N,N-diethoxy PABA ethyl ester,
N,N-dimethyl PABA ethyl ester, and N,N-dimethyl PABA butyl ester;
anthranilate UV absorbers such as homomenthyl-N-acetyl
anthranilate; salicylate UV absorbers such as amyl salicylate,
menthyl salicylate, homomentyl salicylate, octyl salicylate, phenyl
salicylate, benzyl salicylate, and p-isopropanol phenyl salicylate;
cinnamate UV absorbers such as octyl cinnamate, ethyl 4-isopropyl
cinnamate, methyl 2,5-diisopropyl cinnamate, ethyl 2,4-diisopropyl
cinnamate, methyl 2,4-diisopropyl cinnamate, propyl
p-methoxycinnamate, isopropyl p-methoxycinnamate, isoamyl
p-methoxycinnamate, octyl p-methoxycinnamate (2-ethylhexyl
p-methoxycinnamate), 2-ethoxyethyl p-methoxycinnamate, cyclohexyl
p-methoxycinnamate, ethyl .alpha.-cyano-.beta.-phenylcinnamate,
2-ethylhexyl .alpha.-cyano-.beta.-phenylcinnamate, and
glycerylmono-2-ethylhexanoyl diparamethoxycinnamate; benzophenone
UV absorbers such as 2,4-dihydroxy benzophenone,
2,2'-dihydroxy-4-methoxybenzophenone,
2,2'-dihydroxy-4,4'-dimethoxybenzophenone,
2,2',4,4'-tetrahydroxybenzophenone,
2-hydroxy-4-methoxybenzophenone,
2-hydroxy-4-methoxy-4'-methylbenzophenone,
2-hydroxy-4-methoxybenzophenone-5-sulfonate, 4-phenylbenzophenone,
2-ethylhexyl-4'-phenyl-benzophenone-2-carboxylate,
2-hydroxy-4-n-octoxybenzophenone, and
4-hydroxy-3-carboxybenzophenone;
3-(4'-methylbenzyliene)-d,l-camphor; 3-benzylidene-d,l-camphor;
urocanic acid; urocanic acid ethyl ester;
2-phenyl-5-methylbenzoxazole; 2,2'-hydroxy-5-methylphenyl
benzotriazol; 2-(2'-hydroxy-5'-t-octylphenyl)benzotriazol;
2-(2'-hydroxy-5'-methylphenyl)benzotriazol; dibenzalazine;
dianisoyl methane; 4-methoxy-4'-t-butyldibenzoylmethane; and
5-(3,3-dimethyl-2-norbornylidene)-3-pentane-2-one.
[0054] Examples of such a variety of extracts include saururaceous
extract, Phellodendron bark extract, dead nettle extract,
glycyrrhiza extract, peony root extract, bouncing Bet extract,
luffa extract, cinchona extract, strawberry geranium extract,
sophorae radix extract, nuphar extract, fennel extract, primrose
extract, rose extract, rehmannia root extract, lemon extract,
lithospermum root extract, aloe extract, calamus root extract,
eucalyptus extract, field horsetail extract, sage extract, thyme
extract, tea extract, seaweed extract, cucumber extract, clove
extract, bramble extract, lemon balm extract, carrot extract, horse
chestnut extract, peach extract, peach leaf extract, mulberry
extract, bachelor button extract, hamamelis extract, placenta
extract, thymic extract, silk extract, and licorice extract,
although the examples are not limited thereto.
[0055] The other components which may be blended are not
particularly limited, and examples thereof include vitamins such as
vitamin A oil, retinol, retinol palmitate, inositol, pyridoxine
hydrochloride, benzyl nicotinate, nicotinamide,
dl-.alpha.-tocopherol nicotinate, magnesium ascorbyl phosphate,
2-O-.alpha.-D-glucopyranosyl L-ascorbic acid, vitamin D2
(ergocalciferol), DL-.alpha.-tocopherol, DL-.alpha.-tocopherol
acetate, pantothenic acid, and biotin; hormones such as estradiol,
and ethynyl estradiol; amino acids such as arginine, aspartic acid,
cystine, cysteine, methionine, serine, leucine, and tryptophan;
anti-inflammatory agents such as allantoin, azulene, and
glycyrrhizic acid; whitening agents such as arbutin; astringents
such as tannic acid; inorganic pigments such as carbon black; fatty
acids such as lauric acid, myristic acid, palmitic acid, stearic
acid, oleic acid, and isostearic acid, as well as addition salts of
the fatty acids, such as sodium salts, potassium salts, calcium
salts, magnesium salts, strontium salts, and barium salts;
refrigerants such as L-menthol and camphor; sulfur; lysozyme
chloride; pyridoxine chloride; and silicone oil.
[0056] The flaky particulate material of the present invention
contains, as a main ingredient, a flaky particulate material with
an average coefficient of friction of not more than 0.50, and a
total light transmittance of not less than 85%, and it has
excellent smoothness and transparency. Thus, a cosmetic composition
containing such a flaky particulate material can provide great
comfort of use and an excellent finish appearance. Furthermore, the
flaky particulate material further satisfying the ratio
(0.degree./45.degree.) of not less than 0.30 gives a cosmetic
composition which can provide a matt appearance. Thus, the flaky
particulate material of the present invention provides a cosmetic
composition with greater comfort of use and a more excellent finish
appearance than ever before.
[0057] The present invention provides a flaky particulate material
that has excellent smoothness and transparency, and can provide a
matt appearance. The flaky particulate material of the present
invention gives a cosmetic composition which can provides great
comfort of use and an excellent appearance.
DETAILED DESCRIPTION OF THE INVENTION
Production of a Flaky Particulate Material
Example 1
[0058] In 2 liters of ion-exchanged water, 100 g of lamellar barium
sulfate.H (average coefficient of friction: 0.61; a product of
Sakai Chemical Industry Co., Ltd) was suspended to prepare a
suspension. A solution of 7.1 g of magnesium chloride hexahydrate
in 50 mL of ion-exchanged water was added to the suspension, and
then a 1-mass % aqueous NaOH solution was added over 30 minutes so
that the pH of the mixture should be within 10 to 11. The mixture
was heated to 70.degree. C., and then a solution of 5.8 g of
coconut oil fatty acid potassium salt in 50 mL of ion-exchanged
water was added over 30 minutes. After completion of addition, the
mixture was aged for 30 minutes, and adjusted the pH of the mixture
to be within 7 to 8 with a 1-mass % aqueous sulfuric acid solution.
The mixture was filtered. The solid matter filtered was washed with
water (until the conductivity of washed liquid be 0.1 mS/cm or
lower), and then dried, to give a flaky particulate material.
Thus-obtained flaky particulate material had an average length of
the major axis of 7.3 .mu.m, the ratio of (average length of the
major axis)/(average particle thickness) of 8.3, an average
coefficient of friction of 0.42, a total light transmittance of
89.8, and a reflection-intensity ratio (0.degree./45.degree.) of
0.37. The reflection-intensity ratio (0.degree./45.degree.) means a
ratio: (a reflection intensity in the condition that the light
incident angle is -45.degree. and an acceptance angle is
0.degree.)/(a reflection intensity in the condition that the light
incident angle is -45.degree. and the acceptance angle is
45.degree.), which was measured by a three-dimensional variable
gloss meter.
Example 2
[0059] In 2 liters of ion-exchanged water, 100 g of lamellar barium
sulfate.H (average coefficient of friction: 0.61) was suspended to
prepare a suspension. A solution of 4.9 g of calcium chloride
dihydrate in 50 mL of ion-exchanged water was added to the
suspension, and then a 1-mass % aqueous NaOH solution was added
over 30 minutes so that the pH of the mixture should be within 10
to 11. The mixture was heated to 70.degree. C., and then a solution
of 5.9 g of potassium myristate in 50 mL of ion-exchanged water was
added over 30 minutes. After completion of addition, the mixture
was aged for 30 minutes, and adjusted the pH of the mixture to be
within 7 to 8 with a 1-mass % aqueous sulfuric acid solution. The
mixture was filtered. The solid matter filtered was washed with
water (until the conductivity of washed liquid be 0.1 mS/cm or
lower), and then dried, to give a flaky particulate material.
Thus-obtained flaky particulate material had an average length of
the major axis of 7.0 .mu.m, the ratio of (average length of the
major axis)/(average particle thickness) of 7.7, an average
coefficient of friction of 0.44, a total light transmittance of
89.7, and a reflection-intensity ratio (0.degree./45.degree.) of
0.37. The reflection-intensity ratio (0.degree./45.degree.) means a
ratio: (a reflection intensity in the condition that the light
incident angle is -45.degree. and an acceptance angle is
0.degree.)/(a reflection intensity in the condition that the light
incident angle is -45.degree. and the acceptance angle is
45.degree.), which was measured by a three-dimensional variable
gloss meter.
Example 3
[0060] In 2 liters of ion-exchanged water, 100 g of lamellar barium
sulfate.H (average coefficient of friction: 0.61) was suspended to
prepare a suspension. A solution of 3.3 g of calcium chloride
dihydrate in 50 mL of ion-exchanged water was added to the
suspension, and then a 1-mass % aqueous NaOH solution was added
over 30 minutes so that the pH of the mixture should be within 10
to 11. The mixture was heated to 70.degree. C., and then a solution
of 4.4 g of potassium palmitate in 50 mL of ion-exchanged water was
added over 30 minutes. After completion of addition, the mixture
was aged for 30 minutes, and adjusted the pH of the mixture to be
within 7 to 8 with a 1-mass % aqueous sulfuric acid solution. The
mixture was filtered. The solid matter filtered was washed with
water (until the conductivity of washed liquid be 0.1 mS/cm or
lower), and then dried, to give a flaky particulate material.
Thus-obtained flaky particulate material had an average length of
the major axis of 7.7 .mu.m, the ratio of (average length of the
major axis)/(average particle thickness) of 8.0, average
coefficient of friction of 0.45, total light transmittance of 89.5,
and a ratio (0.degree./45.degree.) of 0.37. The ratio
(0.degree./45.degree.) means the ratio of an intensity of
reflection to light incident at -45.degree. at an acceptance angle
of 0.degree. relative to that at an acceptance angle of 45.degree.,
as measured by a three-dimensional variable gloss meter.
Example 4
[0061] In 2 liters of ion-exchanged water, 100 g of sericite FSE
(average coefficient of friction: 0.77; a product of Sanshin Mining
Ind., Co., Ltd) was suspended to prepare a suspension. A solution
of 7.0 g of magnesium chloride hexahydrate in 50 mL of
ion-exchanged water was added to the suspension, and then a 1-mass
% aqueous NaOH solution was added over 30 minutes so that the pH of
the mixture should be within 10 to 11. The mixture was heated to
70.degree. C., and then a solution of 7.0 g of sodium stearate in
50 mL of ion-exchanged water was added over 30 minutes. After
completion of addition, the mixture was aged for 30 minutes, and
adjusted the pH of the mixture to be within 7 to 8 with a 1-mass %
aqueous sulfuric acid solution. The mixture was filtered. The solid
matter filtered was washed with water (until the conductivity of
washed liquid be 0.1 mS/cm or lower), and then dried, to give a
flaky particulate material. Thus-obtained flaky particulate
material had an average length of the major axis of 14.7 .mu.m, the
ratio of (average length of the major axis)/(average particle
thickness) of 47, an average coefficient of friction of 0.48, a
total light transmittance of 87.8, and a reflection-intensity ratio
(0.degree./45.degree.) of 0.35. The reflection-intensity ratio
(0.degree./45.degree.) means the ratio of an intensity of
reflection to light incident at -45.degree. at an acceptance angle
of 0.degree. relative to that at an acceptance angle of 45.degree.,
as measured by a three-dimensional variable gloss meter.
Comparative Example 1
[0062] In 2 liters of ion-exchanged water, 100 g of lamellar barium
sulfate.H (average coefficient of friction: 0.61) was suspended to
prepare a suspension. A solution of 7.1 g of magnesium chloride
hexahydrate in 50 mL of ion-exchanged water was added to the
suspension, and then a 1-mass % aqueous NaOH solution was added
over 5 minutes so that the pH of the mixture should be within 10 to
11. The mixture was heated to 70.degree. C., and then a solution of
5.8 g of coconut oil fatty acid potassium salt in 50 mL of
ion-exchanged water was added over 30 minutes. After completion of
addition, the mixture was aged for 30 minutes, and adjusted the pH
of the mixture to be within 7 to 8 with a 1-mass % aqueous sulfuric
acid solution. The mixture was filtered. The solid matter filtered
was washed with water (until the conductivity of washed liquid be
0.1 mS/cm or lower), and then dried, to give a flaky particulate
material. Thus-obtained flaky particulate material had an average
length of the major axis of 7.0 .mu.m, the ratio of (average length
of the major axis)/(average particle thickness) of 8.1, an average
coefficient of friction of 0.56, a total light transmittance of
89.5, and a reflection-intensity ratio (0.degree./45.degree.) of
0.40. The reflection-intensity ratio (0.degree./45.degree.) means
the ratio of an intensity of reflection to light incident at
-45.degree. at an acceptance angle of 0.degree. relative to that at
an acceptance angle of 45.degree., as measured by a
three-dimensional variable gloss meter.
Comparative Example 2
[0063] In 2 liters of ion-exchanged water, 100 g of lamellar barium
sulfate.H (average coefficient of friction: 0.61; a product of
Sakai Chemical Industry, Co., Ltd) was suspended to prepare a
suspension. A solution of 7.1 g of magnesium chloride hexahydrate
in 50 mL of ion-exchanged water was added to the suspension, and
then a 1-mass % aqueous NaOH solution was added over 30 minutes so
that the pH of the mixture should be within 10 to 11. The mixture
was heated to 70.degree. C., and then a solution of 5.8 g of
coconut oil fatty acid potassium salt in 50 mL of ion-exchanged
water was added over 5 minutes. After completion of addition, the
mixture was aged for 30 minutes, and adjusted the pH of the mixture
to be within 7 to 8 with a 1-mass % aqueous sulfuric acid solution.
The mixture was filtered. The solid matter filtered was washed with
water (until the conductivity of washed liquid be 0.1 mS/cm or
lower), and then dried, to give a flaky particulate material.
Thus-obtained flaky particulate material had an average length of
the major axis of 7.3 .mu.m, the ratio of (average length of the
major axis)/(average particle thickness) of 8.6, an average
coefficient of friction of 0.55, a total light transmittance of
89.8, and a reflection-intensity ratio (0.degree./45.degree.) of
0.39. The reflection-intensity ratio (0.degree./45.degree.) means a
ratio: (a reflection intensity in the condition that the light
incident angle is -45.degree. and an acceptance angle is
0.degree.)/(a reflection intensity in the condition that the light
incident angle is -45.degree. and the acceptance angle is
45.degree.), which was measured by a three-dimensional variable
gloss meter.
Comparative Example 3
[0064] In 2 liters of ion-exchanged water, 100 g of lamellar barium
sulfate.H (average coefficient of friction: 0.61; a product of
Sakai Chemical Industry Co., Ltd.) was suspended to prepare a
suspension. A solution of 7.1 g of magnesium chloride hexahydrate
in 50 mL of ion-exchanged water was added to the suspension. The
mixture was heated to 70.degree. C., and then a solution of 5.8 g
of coconut oil fatty acid potassium salt in 50 mL of ion-exchanged
water was added over 30 minutes. After completion of addition, the
mixture was aged for 30 minutes, and the mixture was filtered. The
solid matter filtered was washed with water (until the conductivity
of washed liquid be 0.1 mS/cm or lower), and then dried, to give a
flaky particulate material. Thus-obtained flaky particulate
material had an average length of the major axis of 7.2 .mu.m, the
ratio of (average length of the major axis)/(average particle
thickness) of 8.5, an average coefficient of friction of 0.54, a
total light transmittance of 89.8, and a reflection-intensity ratio
(0.degree./45.degree.) of 0.38. The reflection-intensity ratio
(0.degree./45.degree.) means a ratio: (a reflection intensity in
the condition that the light incident angle is -45.degree. and an
acceptance angle is 0.degree.)/(a reflection intensity in the
condition that the light incident angle is -45.degree. and the
acceptance angle is 45.degree.), which was measured by a
three-dimensional variable gloss meter.
Comparative Example 4
[0065] In 2 liters of ion-exchanged water, 100 g of lamellar barium
sulfate.H (average coefficient of friction: 0.61) was suspended to
prepare a suspension. A solution of 0.04 g of calcium chloride
dihydrate in 50 mL of ion-exchanged water was added to the
suspension, and then a 0.3-mass % aqueous NaOH solution was added
over 30 minutes so that the pH of the mixture should be within 10
to 11. The mixture was heated to 70.degree. C., and then a solution
of 0.05 g of potassium palmitate in 50 mL of ion-exchanged water
was added over 30 minutes. After completion of addition, the
mixture was aged for 30 minutes, and adjusted the pH of the mixture
to be within 7 to 8 with a 0.3-mass % aqueous sulfuric acid
solution. The mixture was filtered. The solid matter filtered was
washed with water (until the conductivity of washed liquid be 0.1
mS/cm or lower), and then dried, to give a flaky particulate
material. Thus-obtained flaky particulate material had an average
length of the major axis of 7.9 .mu.m, the ratio of (average length
of the major axis)/(average particle thickness) of 8.4, an average
coefficient of friction of 0.59, a total light transmittance of
89.8, and a reflection-intensity ratio (0.degree./45.degree.) of
0.39. The reflection-intensity ratio (0.degree./45.degree.) means a
ratio: (a reflection intensity in the condition that the light
incident angle is -45.degree. and an acceptance angle is
0.degree.)/(a reflection intensity in the condition that the light
incident angle is -45.degree. and the acceptance angle is
45.degree., which was measured by a three-dimensional variable
gloss meter.
Comparative Example 5
[0066] In 2 liters of ion-exchanged water, 100 g of sericite FSE
(average coefficient of friction: 0.77) was suspended to prepare a
suspension. A solution of 25.4 g of magnesium chloride hexahydrate
in 50 mL of ion-exchanged water was added to the suspension, and
then a 3-mass % aqueous NaOH solution was added over 30 minutes so
that the pH of the mixture should be within 10 to 11. The mixture
was heated to 70.degree. C., and then a solution of 24.3 g of
sodium stearate in 50 mL of ion-exchanged water was added over 30
minutes. After completion of addition, the mixture was aged for 30
minutes, and adjusted the pH to be within 7 to 8 with a 1-mass %
aqueous sulfuric acid solution. The mixture was filtered. The solid
matter filtered was washed with water (until the conductivity of
washed liquid be 0.1 mS/cm or lower), and then dried, to give a
flaky particulate material. Thus-obtained flaky particulate
material had an average length of the major axis of 15.3 .mu.m, the
ratio of (average length of the major axis)/(average particle
thickness) of 51, an average coefficient of friction of 0.72, a
total light transmittance of 87.4, and a reflection-intensity ratio
(0.degree./45.degree.) of 0.38. The reflection-intensity ratio
(0.degree./45.degree.) means a ratio: (a reflection intensity in
the condition that the light incident angle is -45.degree. and an
acceptance angle is 0.degree.)/(a reflection intensity in the
condition that the light incident angle is -45.degree. and the
acceptance angle is 45.degree.), which was measured by a
three-dimensional variable gloss meter.
Referential Example 1
[0067] A product of boron nitride, "CREAM BLANCH" (a product of
Mizushima Ferroalloy Co., Ltd) was analyzed. The analysis revealed
that the "CREAM BLANCH" had an average length of the major axis of
9.5 .mu.m, the ratio (average length of the major axis)/(average
particle thickness) of 46, an average coefficient of friction of
0.50, a total light transmittance of 75.9, and a
reflection-intensity ratio (0.degree./45.degree.) of 0.24. The
reflection-intensity ratio (0.degree./45.degree.) means a ratio: (a
reflection intensity in the condition that the light incident angle
is -45.degree. and an acceptance angle is 0.degree.)/(a reflection
intensity in the condition that the light incident angle is
-45.degree. and the acceptance angle is 45.degree.), which was
measured by a three-dimensional variable gloss meter.
[0068] The average coefficient of friction, the total light
transmittance, and the reflection-intensity ratio
(0.degree./45.degree.) of the obtained flaky particulate material
were measured in the following manner.
Calculation of an Average Coefficient of Friction
[0069] A 25-mm-width piece of a double stick tape was taped on a
slide glass, and then a flaky particulate material was placed on
the tape. The flaky particulate material was spread on the plate
glass with a cosmetic powder-puff. The coefficient of friction of
the sample was measured by Friction Tester KES-SE (a product of
Kato Tech Co., Ltd.) with a silicone rubber friction block. The
average coefficients of friction were determined from a 20-mm
average of coefficient of friction (.mu.).
[0070] The average coefficient of friction of lamellar barium
sulfate.H (particle size: 5 to 10 .mu.m, a product of Sakai
Chemical Industry Co., Ltd), which was used as a substrate
particle, was 0.56.
Measurement of a Total Light Transmittance
[0071] A 2-g portion of a flaky particulate material and an 8-g
portion of liquid paraffin SMOIL.TM. P-80 (a product of Matsumura
Oil Research Corp.) were kneaded in a Hoover's muller, and then
formed a 25-.mu.m thin film from the resultant paste using an
applicator. Total light transmittance of the thin film was measured
with a haze meter HM-150 (a product of Murakami Color Research
Laboratory, Co., Ltd.).
Measurement of a Reflection-Intensity Ratio
(0.degree./45.degree.)
[0072] A sample was placed on "SAPURERE" (protein
powder-incorporated polyurethane-coated synthetic leather; a
product of Idemitsu Technofine Co., Ltd.), and the sample was
spread uniformly with a cosmetic sponge. The intensity of
reflection of the sample to light that was incident at -45.degree.
was measured by a three-dimensional variable gloss meter GP-200(a
product of Murakami Color Research Laboratory, Co., Ltd.) The ratio
of intensities of reflection: (the intensity at an acceptance angle
of 0.degree.)/(the intensity at an acceptance angle of 45.degree.)
was calculated. The higher the above ratio is, the greater the
degree of matte is.
[0073] As is to be understood from the results, sericite FSE and
lamellar barium sulfate.H gives a greater matt appearance than
boron nitride.
[0074] Amounts of fatty acid metal salts deposited on the obtained
flaky particulate material are illustrated in Table 1.
TABLE-US-00001 TABLE 1 Deposited amount of the Charged fatty acid
Charged amount of metal salt amount of a water- (mass % a water-
soluble fatty of a flaky soluble acid metal particulate salt (g)
salt (g) material) Example 1 7.1 5.8 5.7 Example 2 4.9 5.9 6.0
Example 3 3.3 4.4 4.5 Example 4 7.0 7.0 6.8 Compar. Ex 1 7.1 5.8
5.7 Compar. Ex 2 7.1 5.8 5.7 Compar. Ex 3 7.1 5.8 5.7 Compar. Ex 4
0.04 0.05 0.05 Compar. Ex 5 25.4 24.3 21.0
Production of a Cosmetic Composition
[0075] According to the formulas illustrated in the below Table 2,
the components (1) to (7) were mixed, and the obtained mass was
triturated. The triturated matter was transferred in a high-speed
blender. The components (8) to (10) were mixed at 80.degree. C. to
dissolve them, and then the resultant solution was added to the
high-speed blender. The mixture in the high-speed blended was
uniformly mixed. The amounts of each component in Table 2 are
expressed as mass %. The components (11) was further added to the
mixture in the blender, and then mixed. Thus-obtained solid matter
was triturated again, and then subjected to screening. The screened
matter was compression-molded on a metal plate, to produce cosmetic
compositions (Examples 5 to 8, Comparative examples 6 to 10, and
Referential examples 2).
Evaluation of cosmetic compositions
[0076] Fifteen subjects evaluated the smoothness, the degree of a
matt appearance on skin, and the degree of naturalness of a tone on
skin, of each obtained cosmetic compositions after applied on skin.
The results are illustrated in the below Table 2. The evaluation
criteria is as follows: [0077] S: Excellent [0078] A: Good [0079]
B: Average [0080] C: Bad
TABLE-US-00002 [0080] TABLE 2 Example Comparative Example Ref. Ex.
5 6 7 8 6 7 8 9 10 2 (1) Mica (as received: Y- 6.5 6.5 6.5 6.5 6.5
6.5 6.5 6.5 6.5 6.5 3000: a product of Yamaguchi Mica Co., Ltd) (2)
Flaky particles 50 50 50 50 50 50 50 50 50 50 (Ex. 1) (Ex. 2) (Ex.
3) (Ex. 4) (Compar. (Compar. (Compar. (Compar. (Compar. (Ref. Ex.
Ex. 1) Ex. 2) Ex. 3) Ex. 4) Ex. 5) 1) (3) Talc (as received: 20 20
20 20 20 20 20 20 20 20 Micro Ace P-2: a product of Nippon Talc
Co., Ltd) (4) Titanium oxide 10 10 10 10 10 10 10 10 10 10 (5)
Colcothar 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 (6) Yellow iron
oxide 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 (7) Black iron oxide
0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 (8) Liquid paraffin 8 8 8 8
8 8 8 8 8 8 (9) Yellow beeswax 2 2 2 2 2 2 2 2 2 2 (10)
Preservative Moderate Moderate Moderate Moderate Moderate Moderate
Moderate Moderate Moderate Moderate amount amount amount amount
amount amount amount amount amount amount (11) Perfume Slight
Slight Slight Slight Slight Slight Slight Slight Slight Slight
amount amount amount amount amount amount amount amount amount
amount Smoothness S S S S B B B B C S Matted appearance S S S S S S
S S S C Transparency S S S S S S S S S C
[0081] As illustrated in Table 2, it was found from the results in
Table 2 that cosmetic compositions that gave skin excellent
smoothness, a matt appearance and an excellent natural tone were
obtained.
[0082] The present invention provides a flaky particulate material
that gives a skin excellent smoothness, an excellent natural tone,
and a matt appearance. The flaky particulate material of the
present invention gives a cosmetic composition which provides a
great comfort of use and an excellent appearance.
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