U.S. patent application number 09/294040 was filed with the patent office on 2001-07-19 for hair conditioning compositions.
Invention is credited to BERGMANN, WOLFGANG, CRUDELE, JOANNE, EVANS, TREFOR, PYLES, DANIEL RAYMOND, SHAH, VARSHA.
Application Number | 20010008630 09/294040 |
Document ID | / |
Family ID | 23131641 |
Filed Date | 2001-07-19 |
United States Patent
Application |
20010008630 |
Kind Code |
A1 |
PYLES, DANIEL RAYMOND ; et
al. |
July 19, 2001 |
HAIR CONDITIONING COMPOSITIONS
Abstract
The present invention relates to hair conditioning shampoo
compositions which includes: 1) from about 0.05 to about 5% of one
or more dibasic amino acids; 2) from about 5 to about 50 % of one
or more surfactants; 3) from about 0.05 to about 10 % of one or
more silicone compounds; and 4) water. The invention also relates
to hair conditioning compositions. The invention also relates to a
method for conditioning hair which comprises contacting said hair
with a composition according to the invention.
Inventors: |
PYLES, DANIEL RAYMOND;
(CHICAGO, IL) ; CRUDELE, JOANNE; (WAUCONDA,
IL) ; EVANS, TREFOR; (LOMBARD, IL) ; SHAH,
VARSHA; (MENASHA, WI) ; BERGMANN, WOLFGANG;
(LONG GROVE, IL) |
Correspondence
Address: |
UNILEVER
PATENT DEPARTMENT
45 RIVER ROAD
EDGEWATER
NJ
07020
US
|
Family ID: |
23131641 |
Appl. No.: |
09/294040 |
Filed: |
April 19, 1999 |
Current U.S.
Class: |
424/400 |
Current CPC
Class: |
A61K 8/892 20130101;
A61Q 5/12 20130101; A61K 8/891 20130101; A61K 8/44 20130101 |
Class at
Publication: |
424/400 |
International
Class: |
A61K 009/00 |
Claims
What is claimed is:
1. A hair shampoo conditioning composition which comprises: a) from
about 0.05 to about 5% of one or more dibasic amino acids; b) from
about 5 to about 50% of one or more surfactants; c) from about 0.05
to about 10% of one or more silicone compounds; and d) water.
2. A composition according to claim 1, which comprises: a) from
about 0.5 to about 2.0% of one or more dibasic amino acids; b) from
about 10 to about 25% of one or more surfactants; c) from about 0.1
to about 5% of one or more silicone compounds; and d) water.
3. A composition according to claim 1 wherein the amino acid is
lysine.
4. A composition according to claim 1 wherein the amino acid is
arginine.
5. A composition according to claim 1 wherein the dibasic amino
acid agent is selected from the group consisting of arginine;
lysine; 6-N-Methyllysine; 5-hydroxylysine; alpha, gamma
diaminobutyric acid; ornithine; and mixtures thereof.
6. A hair conditioning composition which comprises: a) from about
0.05 to about 2% of one or more dibasic amino acids; b) from about
0.1 to about 10% of one or more surfactants; c) from about 0.05 to
about 10% of one or more silicone compounds; and d) water.
7. A composition according to claim 6 wherein said dibasic amino
acid is lysine.
8. A composition according to claim 1 selected from the group
consisting of
5 Ingredient Formula I Water qs Sodium Laureth Sulfate (2 Moles),
25% 56 Cocamidopropyl Betaine, 30% 6.7 Carbomer .4 Dimethiconol,
50%, & TEA-Dodecylbenzylsulfonate, 1% 4 Propylene Glycol .5
Guar Hydroxypropyltrimonium Chloride .1 L-Arginine Base -- L-Lysine
HCl 2 Sodium Glutamate -- Other.sup.1 qs Other.sup.1 Preservatives,
Chelating Agents, pH adjusters, viscosity modifiers and other minor
ingredients.
9. A method for conditioning hair which comprises contacting said
hair with a composition according to claim 1.
10. A method for conditioning hair which comprises contacting said
hair with a composition according to claim 6.
Description
BACKGROUND OF THE INVENTION
[0001] Most individuals buy and use a hair shampoo for its
cleansing properties. In addition to having clean hair, a consumer
also desires sufficiently-conditioned hair that holds a preset
configuration. However, hair shampoos generally are formulated with
highly effective anionic surfactants that primarily clean as
opposed to conditioning in the hair. Anionic surfactants not only
remove the dirt and soil from the hair, but also remove sebum
naturally present on the surface of the hair fibers. Therefore, the
desirable cleansing properties of anionic surfactants also leave
the hair in a cosmetically-unsatisfactory condition. Shampoos also
do not detangle wet hair and do not impart residual conditioning
benefits to dry hair, such as manageability or styleability of hair
sets.
[0002] In general, shampoo compositions containing anionic
surfactants, or nonionic surfactants or amphoteric surfactants,
leave hair with an undesirable harsh, dull and dry touch, or feel,
usually called "creak", after the hair is shampooed and then rinsed
with water. Furthermore, thoroughly cleansed hair also is extremely
difficult to comb, in either the wet or the dry state, because the
individual hair fibers tend to snarl, kink, and interlock with each
other. In addition, incompletely dried hair, such as hair dried
with a towel, has poor brushing properties, and after complete
drying, the hair does not set well. The combing or brushing
property of dry hair remains poor, and the hair has undesirable
electrostatic properties in a low humidity atmosphere that causes
the hair to "fly away", thereby further reducing the brushing
properties of the hair.
[0003] The unsatisfactory combing or brushing property of hair
immediately after shampooing, or during trimming treatments after
shampooing, also causes hair damage, such as split ends or hair
breakage. In addition, the natural luster and resiliency of the
hair is reduced. The overall unsatisfactory condition of shampooed
hair often necessitates a subsequent post-shampoo treatment of the
hair with a conditioning composition to improve these undesirable
physical characteristics. Conditioning compositions typically are
applied separately from the hair shampoo, and usually are rinses,
cream-like emulsions or lotions containing a cationic compound.
[0004] Therefore, consumer needs traditionally have been met by the
application of a shampoo to cleanse the hair, followed by the
application of a conditioner composition to improve wet combing.
The commonly accepted method has been to shampoo the hair, followed
by rinsing the hair, and then separately applying a conditioner
composition, followed by a second rinse. The wet combing problem
has been solved by treating shampooed hair with a conditioner
composition that coats the hair shaft and causes the individual
hair shafts in a tress to resist tangling and matting because of
the conditioner residue retained on the shaft.
[0005] However, the need for improved compositions that condition
the hair, i.e., render the hair more manageable, has long been
recognized in the art. As previously discussed, it is well-known
that anionic surfactants are suitable for hair shampooing, and that
cationic compounds, like cationic surfactants and cationic
polymers, are useful as hair conditioners. Therefore, cationic
compounds that are substantive to hair often are used to complete
the hair cleansing and hair conditioning cycle.
[0006] The ability of cationic compounds to adsorb to or interact
with the keratinous material of the hair makes these compounds
desirable for improving wet hair detangling and dry hair
manageability. However, cationic compounds that adsorb particularly
strongly to the hair also can reduce the elasticity, body and set
of the dried hair. Therefore, new hair conditioning agents would be
desirable.
[0007] The following is a list of patents in this field.
[0008] GB 2322550A
[0009] JP 10175826 A
[0010] JP 10175824A
[0011] WO 9703122 Al
[0012] EP 747035
[0013] JP 2247113A and
[0014] JP 59031706 A.
[0015] The present invention is directed to new hair conditioning
compositions that are esthetically acceptable to consumers,
improves the wet combing and properties of hair, and also leaves
the dry hair with satisfactory cosmetic and physical properties,
including, in particular, feel, less hair coating, manageability,
body, condition of the ends and set.
SUMMARY OF THE INVENTION
[0016] The invention relates to hair conditioning compositions
(both conditioners and shampooing conditioners) that comprise a
dibasic amino acid.
[0017] The present invention relates a method for conditioning hair
which comprises contacting hair with compositions of the
invention.
DETAILED DESCRIPTION OF THE INVENTION
[0018] Unless indicated otherwise, as used herein, % means weight
%. The starting materials set forth herein are either known or can
be prepared in accordance with known methods. Compositions of the
invention can be prepared by methods known in the art such as those
set forth in the Reid and Murray patent, U.S. Pat. No. 5,085,857,
issued Feb. 4, 1992, which is hereby incorporated by reference.
[0019] The present invention relates to a hair conditioner which
comprises a dibasic amino acid. Two amino acids used in
compositions of the invention are arginine and lysine. Both provide
significant increases in the conditioning benefits of a
conditioning shampoo, that is, both of the above dibasic amino
acids serve as conditioning agents. The other dibasic amino acids
recited herein also serve as conditioning agents.
[0020] Lysine, which has a second amino group at the epsilon
position on its aliphatic chain; and arginine which has a guanidino
group are useful in compositions of the invention. Mixtures of
these two amino acids or their derivatives, such as,
6-N-Methyllysine and 5-hydroxylysine, are also useful in
conditioning compositions of the invention. In addition, other
amino acids with a dibasic character, such as those found in plants
may be used. Non-limiting examples of these are alpha, gamma
diaminobutyric acid and ornithine both of which have a second amino
group on their aliphatic chain.
[0021] Conditioning shampoo compositions of the invention comprise
ingredients in the following ranges of weight percents:
[0022] 1) from about 0.05 to about 5% of one or more dibasic amino
acids;
[0023] 2) from about 5 to about 50% of one or more surfactants;
[0024] 3) from about 0.05 to about 10% of one or more silicone
compounds; and
[0025] 4) water.
[0026] More preferred ranges of ingredients for these materials are
as follows:
[0027] 1) from about 1.0 to about 2.0% of one or more dibasic amino
acids;
[0028] 2) from about 10 to about 25% of one or more
surfactants;
[0029] 3) from about 0.1 to about 5.0% of one or more silicone
compounds; and
[0030] 4) water.
[0031] Dibasic Amino Acids
[0032] The amino acids which can be used in the compositions of the
invention include arginine; lysine; 6-N-Methyllysine;
5-hydroxylysine; alpha, gamma diaminobutyric acid and ornithine;
and the like.
[0033] Surfactants
[0034] The compositions according to the invention comprise one or
more surfactants selected from the group consisting of anionic,
nonionic, zwitterionic or amphoteric surfactants or mixtures
thereof.
[0035] Suitable anionic surfactants include alkyl sulphates, alkyl
ether sulphates, alkaryl sulphonates, alkanoyl isethionates, alkyl
succinates, alkyl sulphosuccinates, n-alkoyl sarcosinates, alkyl
phosphates, alkyl ether phosphates, alkyl ether carboxylates, and
alpha-olefin sulphonates, especially their sodium, magnesium
ammonium and mono-, di- and triethanolamine salts. The alkyl and
acyl groups generally contain from 8 to 18 carbon atoms and may be
unsaturated. The alkyl ether sulphates, alkyl ether phosphates and
alkyl ether carboxylates may contain from 1 to 10 ethylene oxide or
propylene oxide units per molecule, and preferably contain 2 to 3
ethylene oxide units per molecule.
[0036] Non-limiting examples of suitable anionic surfactants
include sodium oleyl succinate, ammonium lauryl sulphosuccinate,
ammonium lauryl sulphate, sodium dodecylbenzene sulphonate,
triethanolamine dodecylbenzene suphonate, sodium cocyl isethionate,
sodium lauroyl isethionate and sodium N-lauryl sarcosinate. The
most preferred anionic surfactants are sodium lauryl sulphate,
triethanolamine lauryl sulphate, triethanolamine monolauryl
phosphate, sodium lauryl ether sulphate 1EO, 2EO and 3EO, ammonium
lauryl sulphate and ammonium lauryl ether sulphate 1EO, 2EO and
3EO.
[0037] Nonionic surfactants suitable for use in compositions of the
invention may include condensation products of aliphatic
(C.sub.8-C.sub.18) primary or secondary linear or branched chain
alcohols or phenols with alkylene oxides, usually ethylene oxide
and generally having from 6 to 30 ethylene oxide groups. Other
suitable nonionics include mono- or di-alkyl alkanolamides.
Non-limiting examples include coco mono- or di-ethanolamide and
coco mono-isopropanolamide.
[0038] Amphoteric and zwitterionic surfactants suitable for use in
compositions of the invention may include alkyl amine oxides, alkyl
betaines, alkyl amidopropyl betaines, alkyl sulphobetaines
(sultaines), alkyl glycinates, alkyl carboxyglycinates, alkyl
amphopropionates, alkylamphoglycinates alkyl amidopropyl
hydroxysultaines, acyl taurates and acyl glutamates, wherein the
alkyl and acyl groups have from 8 to 19 carbon atoms. Non-limiting
examples include lauryl amine oxides, cocodimethyl sulphopropyl
betaine and preferably lauryl betaine, cocamidopropyl betaine and
sodium cocamphopropionate.
[0039] One or more surfactants are present in shampoo compositions
of the invention in an amount of from 0.1 to 50% by weight,
preferably from 0.5 to 30% by weight. Generally, the surfactants
are present in shampoo compositions of the invention in an amount
of from 0.1 to 50%, preferably from 5 to 30%, more preferably from
10% to 25% by weight.
[0040] Silicone Compounds
[0041] The shampoo composition of the invention also comprises one
or more insoluble, non-volatile silicones, which may be one or more
polyalkyl siloxanes, one or more polyalkylaryl siloxanes, or
mixtures thereof. The silicone or silicones are insoluble in the
aqueous matrix of the composition and therefore are present in an
emulsified form, with the silicone(s) present as dispersed
particles.
[0042] Suitable polyalkyl siloxanes include polydimethyl siloxanes
which have the CTFA designation dimethicone, having a viscosity of
from 5 to 100,000 centistokes at 25.degree. C. These siloxanes are
available commercially from the General Electric Company as the
Viscasil series and from Dow Corning as the DC 200 series. The
viscosity can be measured by means of a glass capillary viscometer
as set out further in Dow Corning Corporate Test Method CTM004 Jul.
20, 1970.
[0043] Also suitable is polydiethyl siloxane.
[0044] The polyalkylaryl siloxanes which may be used in the
compositions of the invention include polymethylphenyl
polysiloxanes having a viscosity of from 15 to 65 centistokes at
25.degree. C. The siloxanes are available commercially from the
General Electric Company as SF1075 methyl phenyl fluid or from Dow
Corning as 556 Cosmetic Grade Fluid.
[0045] Also suitable are silicone gums, such as those described in
U.S. Pat. No. 4,152,416 (Spitzer), and on General Electric Silicone
Rubber product Data Sheet SE 30, SE 33, SE 54 and SE76. U.S. Pat.
No. 4,152,416 (Spitzer), is hereby incorporated by reference.
"Silicone gum" denotes polydiorganosiloxanes having a molecular
weight of from 200,000 to 1,000,000 and specific non-limiting
examples include polydimethyl siloxane polymers, polydimethyl
siloxane/diphenyl/methylvinylsiloxane copolymers,
polydimethylsiloxane/methylvinylsiloxane copolymers and mixtures
thereof.
[0046] Amino functional silicones which have the CTFA designation
amodimethicone, are also suitable for use in the compositions of
the invention, as are polydimethyl siloxanes having hydroxyl end
groups (which have the CTFA designation dimethiconol).
Optional Ingredients
[0047] Nonionic surfactants
[0048] Examples of nonionic emulsifiers or surfactants which can be
included in the compositions of the invention are alkylphenol
ethoxylates, e.g., nonylphenol ethoxylates nEO, where n is from 1
to 50, alcohol ethoxylates, e.g., lauryl alcohol nEO, where n is
from 1 to 50, ester ethoxylates, e.g., polyoxyethylene monostearate
where the number of oxyethylene units is from 1 to 30.
[0049] Quaternary Ammonium Conditioning Compounds
[0050] In addition to the dibasic amino acid(s) which are included
as conditioning agents, the following quaternary ammonium
compounds, which are also conditioning agents, can be included in
the hair conditioning compositions of the invention: quaternary
ammonium compounds of the formula:
N.sup.+R.sup.1R.sup.2R.sup.3R.sup.4X.sup.-
[0051] wherein R.sup.1, R.sup.2, and R.sup.3 are C1 to C3 alkyl
groups and R.sup.4 is a C16 or greater alkyl group and X.sup.-is
chloride, bromide methosulfate , ethosulfate, nitrate or tosylate.
Non-limiting examples of these monoalkyl quaternary ammonium
compounds are:
[0052] cetyltrimethyl ammonium chloride;
[0053] stearyltrimethyl ammonium chloride;
[0054] behenetrimethyl ammonium chloride;
[0055] cetrimonium chloride;
[0056] soytrimonium chlorde;
[0057] tallowtrimonium chloride;
[0058] behentrimethylammonium methosulfate;
[0059] PEG-2 Olealmonium chloride;
[0060] palmityltrimethylammonium chloride;
[0061] hydrogenated tallowtrimethylammonium chlorde;
[0062] hydrogenated tallowtrimethylammonium bromide;
[0063] hydrogenated tallowtrimethylammonium methosulfate;
[0064] cetrimonium tosylate; and
[0065] eicosyltrimethylammonium chloride.
[0066] The following quaternary ammonium compounds can also be
included in the hair conditioning compositions of the invention:
quaternary ammonium compounds of the formula:
N.sup.+R.sup.5R.sup.6R.sup.7R.sup.8X.sup.-
[0067] wherein R.sup.5, and R.sup.6 are C1 to C3 alkyl groups and
R.sup.7 and R.sup.8 are a C16 or greater alkyl groups and X.sup.-is
chloride, bromide methosulfate, ethosulfate, nitrate or tosylate.
Non-limiting examples of these dialkyl quaternary ammonium
compounds are:
[0068] dicetyldimethylammonium chloride;
[0069] distearydimethylammonium chloride;
[0070] dipalmityidimethylammonium chloride;
[0071] dihydrogenatedtallowd imethylammonium chloride;
[0072] ditallowdimethylammonium chloride;
[0073] dihydrogenatedtallowdimethylammonium bromide; and
[0074] dihydrogenatedtallowdimethylammonium methosulfate;
[0075] Cationic Conditioning Polymers
[0076] A further component of hair treatment compositions of the
invention is optionally a cationic conditioning polymer which
serves as a conditioning agent, in addition to the dibasic amino
acid(s) that are present.
[0077] The polymer may be a homopolymer or be formed from two or
more types of monomers. The molecular weight of the polymer will
generally be between 5,000 and 10,000,000, typically at least
10,000 and preferably in the range 100,000 to about 2,000,000. The
polymers will have cationic nitrogen containing groups such as
quaternary ammonium or protonated amino groups, or a mixture
thereof.
[0078] The cationic nitrogen-containing group will generally be
present as a substituent on a fraction of the total monomer units
of the cationic conditioning polymer. Thus when the polymer is not
a homopolymer it can contain spacer non-cationic monomer units.
Such polymers are described in the CTFA Cosmetic Ingredient
Directory, 3rd Edition.
[0079] Suitable cationic conditioning polymers include, for
example, copolymers of vinyl monomers having cationic amine or
quaternary ammonium functionalities with water soluble spacer
monomers such as (meth) acrylamide, alkyl and dialkyl (meth)
acrylamides, alkyl (meth) acrylate, vinyl caprolactone and vinyl
pyrrolidine. The alkyl and dialkyl substituted monomers preferably
have C1-C7 alkyl groups, more preferably C1-C3 alkyl groups. Other
suitable spacers include vinyl esters, vinyl alcohol, maleic
anhydride, propylene glycol and ethylene glycol.
[0080] The cationic amines can be primary, secondary or tertiary
amines, depending upon the particular species and the pH of the
composition. In general, secondary and tertiary amines, especially
tertiary, are preferred.
[0081] Amine substituted vinyl monomers and amines can be
polymerized in the amine form and then converted to ammonium by
quaternization.
[0082] Non-limiting cationic amino and quaternary ammonium monomers
include, for example, vinyl compounds substituted with dialkyl
aminoalkyl acrylate, dialkylamino alkylmethacrylate,
monoalkylaminoalkyl acrylate, monoalkylaminoalkyl methacrylate,
trialkyl methacryloxyalkyl ammonium salt, trialkyl acryloxyalkyl
ammonium salt, diallyl quaternary ammonium salts, and vinyl
quaternary ammonium monomers having cyclic cationic
nitrogen-containing rings such as pyridinium, imidazolium, and
quaternized pyrrolidine, e.g., alkyl vinyl imidazolium, and
quaternized pyrrolidine, e.g., alkyl vinyl imidazolium, alkyl vinyl
pyridinium, alkyl vinyl pyrrolidine salts. The alkyl portions of
these monomers are preferably lower alkyl such as the C1-C3 alkyls,
more preferably C1 and C2 alkyls. Also included is guar
hydroxypropyltrimonium chloride.
[0083] Non-limiting amine-substituted vinyl monomers include
dialkylaminoalkyl acrylamide, and dialkylaminoalkyl methacrylamide,
dialkylaminoalkyl acrylamide, and dialkylaminoalkyl methacrylamide,
wherein the alkyl groups are preferably C1-C7 hyrocarbyls, more
preferably C1-C3, alkyls.
[0084] The cationic conditioning polymers can comprise mixtures of
monomer units derived from amine- and/or quaternary
ammonium-substituted monomer and/or compatible spacer monomers.
[0085] Non-limiting cationic conditioning polymers include, for
example: copolymers of 1-vinyl-2 pyrrolidine and
1-vinyl-3-methyl-imidazolium salt (e.g., Chloride salt) (referred
to in the industry by the Cosmetic, Toiletry, and Fragrance
Association, "CTFA" as Polyquaternium-16) such as those
commercially available from BASF Wyandotte Corp. (Parsippany, N.J.,
USA) under the LUVIQUAT tradename (e.g., LUVIQUAT FC 370);
copolymers of 1-vinyl-2-pyrrolidine and dimethylaminoethyl
methacrylate (referred to in the industry by CTFA as
Polyquaternium-11). The long chain acyl derivative is desirably
selected from ethylene glycol stearate, alkanolamides of fatty
acids having from 16 to 22 carbon atoms and mixtures thereof.
Ethylene glycol distearate and Polyethylene glycol 3 distearate are
preferred long chain acyl derivatives.
[0086] Depending on the type of composition employed, one or more
additional ingredients conventionally incorporated into hair
treatment compositions may be included in compositions of the
invention. Such additional ingredients include styling agents, such
as resins and hair-setting polymers, perfumes, dyes, buffering or
pH adjusting agents, viscosity modifiers, opacifiers, pearlescers,
preservatives, antibacterial agents, antidandruff agents, foam
boosters, proteins, moisturizing agents, herb or other plant
extracts and other natural ingredients.
[0087] To demonstrate the new and unexpected results achieved by
the present invention, the compositions described below were
prepared.
[0088] Compositions of the present invention have significantly
more conditioning versus formulations used as comparisons. The
following chart illustrates the conditioning properties of
compositions of the invention. These compositions shown in the
following chart are similar to the compositions set forth in the
Reid and Murray patent, U.S. Pat. No. 5,085,857, and were made in a
similar manner. The Reid and Murray patent, U.S. Pat. No. 5,085,857
is hereby incorporated by reference. The levels of Arginine Base
and Lysine HCl present in these compositions is set forth in the
following chart. The Instron wet combing test which is mentioned
below is a test that is known in the art.
Instron Wet Combing
[0089]
1 Arginine Instron Formula Base Lysine HCl WC Force No. wt % wt %
gm force A(Control) 0.01 0 25.3 B(Control) 0 0.01 25.3 G 0 0.25
24.2 F 0 0.5 23.9 E 0 1 23.9 D 0 2 21.5 C 2 0 21.4
[0090] As evidenced by the above table, increasing levels of Lysine
or Arginine decrease the wet combing force as shown by the Instron
method, indicating enhanced conditioning.
[0091] In the following chart, The Instron Wet Combing data is
correlated with Sensory Descriptive Testing. These compositions
shown in the following chart are similar to the compositions set
forth in the Reid and Murray patent, U.S. Pat. No. 5,085,857, and
were made in a similar manner.
Instron Wet Combing & Sensory Descriptive Test
[0092]
2 Formula H Ingredient (Control) Formula I Water qs qs Sodium
Laureth Sulfate (2 Moles), 25% 56 56 Cocamidopropyl Betaine, 30%
6.7 6.7 Carbomer .4 .4 Dimethiconol, 50%, & TEA- 4 4
Dodecylbenzylsulfonate, 1% Propylene Glycol .5 .5 Guar
Hydroxypropyltrimonium Chloride .1 .1 L-Arginine Base .01 --
L-Lysine HCl -- 2 Sodium Glutamate 2 -- Other.sup.1 qs qs Wet
Combing Force (gm force) 19.2 15.3 Sensory Descriptive Test Wet
Detangling 67.2 71.7 Wet Combing 64.4 68.1 .sup.1Preservatives,
chelating agents, pH adjusters, viscosity modifiers and other minor
ingredients.
[0093] Formula I with 2% L-Lysine HCL, a dibasic amino acid, shows
better Wet Combing (lower force) versus formula H with 2% Sodium
Glutamate. Also formula I performed better (higher score) in a
Sensory Descriptive Test (tresses) versus formula H in Wet
Detangling and Wet Combing. Sensory descriptive ratings which are
higher indicate easier/better performance on the cited attributes
of wet detangling and wet combing. The Sensory Descriptive Tests
were run by methods known in the art.
[0094] Several amino acids were further investigated for their
ability to enhance wet combing. The following charts summarize.
3 Ingredient Formulation J Water Qs Sodium Laureth Sulfate (2
Moles), 25% 56 Cocamidopropyl Betaine, 30% 6.7 DC 2-1391 Emulsion,
25% 3.2 Other.sup.1 Qs Other.sup.1 = Preservatives, Chelating
Agents, pH adjusters, viscosity modifiers and other minor
ingredients.
[0095] Various different amino acids were introduced into
Formulation J. The outcome of the Instron wet combing study is
given in the chart below.
Instron Wet Combing Study
[0096]
4 Formula Amino acid gram force J 25.7 L 2% L-Arginine 23.2 M 2%
L-Lysine HCl 23.7 N 2% L-Alanine 26.0 O 2% L-Histidine 25.2 P 2%
L-Phenylalanine 25.5 Q 2% L-Proline 25.6 R 2% L-Glycine 25.4 S 2%
Sodium Glutamate 25.4
[0097] This chart clearly shows that only dibasic amino acids,
Arginine and Lysine, formulas L and M lower the wet combing force
relative to the control (which is Formula J).
* * * * *