U.S. patent application number 13/541117 was filed with the patent office on 2017-04-06 for method for treating hair fibers.
This patent application is currently assigned to L'Oreal SA. The applicant listed for this patent is Thomas Fondin, Anne Sabbagh. Invention is credited to Thomas Fondin, Anne Sabbagh.
Application Number | 20170095408 13/541117 |
Document ID | / |
Family ID | 35096497 |
Filed Date | 2017-04-06 |
United States Patent
Application |
20170095408 |
Kind Code |
A9 |
Fondin; Thomas ; et
al. |
April 6, 2017 |
METHOD FOR TREATING HAIR FIBERS
Abstract
A hair fiber treating method not containing a fixing step,
comprising, applying to the hair fibers at least one reducing
composition, free of ceramide, comprising at least one reducing
agent; and raising the temperature of the hair fibers using a
heating iron at temperature of at least 60.degree. C., wherein the
temperature of the hair fibers are raised before or after the hair
fiber are optionally rinsed.
Inventors: |
Fondin; Thomas; (Taverny,
FR) ; Sabbagh; Anne; (Rueil Malmaison, FR) |
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Applicant: |
Name |
City |
State |
Country |
Type |
Fondin; Thomas
Sabbagh; Anne |
Taverny
Rueil Malmaison |
|
FR
FR |
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Assignee: |
L'Oreal SA
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Prior
Publication: |
|
Document Identifier |
Publication Date |
|
US 20130000661 A1 |
January 3, 2013 |
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|
Family ID: |
35096497 |
Appl. No.: |
13/541117 |
Filed: |
July 3, 2012 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
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11097167 |
Apr 4, 2005 |
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13541117 |
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60571922 |
May 18, 2004 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A61Q 5/04 20130101; A45D
7/02 20130101; A61K 8/46 20130101; A45D 1/04 20130101; A61Q 5/00
20130101 |
International
Class: |
A45D 7/06 20060101
A45D007/06 |
Foreign Application Data
Date |
Code |
Application Number |
Apr 2, 2004 |
FR |
04 50667 |
Claims
1-25. (canceled)
26. A method for treating hair fibers comprising, applying to the
hair fibers at least one reducing composition, free of ceramide,
comprising at least one reducing agent, wherein the at least one
reducing agent is chosen from thiols and wherein when the at least
one reducing composition does not comprise at least one aminothiol
compound, the at least one reducing agent is present in an amount
of less than 3% by weight, relative to the total weight of the at
least one reducing composition, when the at least one reducing
composition does comprise at least one aminothiol compound, the at
least one reducing agent is present in an amount of less than 5% by
weight, relative to the total weight of the at least one reducing
composition, and applying a heating iron to the hair fibers to
raise the temperature of said hair fibers, wherein said heating
iron has a temperature ranging from 120.degree. C. to 220.degree.
C., and wherein the heating iron is applied before or after the
hair fibers are optionally rinsed, and wherein the method does not
include a fixing step.
27. The method according to claim 26, wherein, when the at least
one reducing composition does not comprise at least one aminothiol
compound, said at least one reducing composition has a pH of less
than or equal to 9.
28. The method according to claim 26, wherein the at least one
reducing composition does not comprise dithiodiglycolic acid or any
salt thereof.
29. The method according to claim 26, wherein when the at least one
reducing composition does not comprise at least one aminothiol, the
at least one reducing agent is present in an amount ranging from
0.1% to 3% by weight, relative to the total weight of the at least
one reducing composition.
30. The method according to claim 29, wherein the at least one
reducing agent is present in an amount ranging from 0.5% to 3% by
weight relative to the total weight of the at least one reducing
composition.
31. The method according to claim 26, wherein when the at least one
reducing composition comprises at least one aminothiol compound,
the at least one reducing agent is present in an amount ranging
from 0.1 to 5% by weight, relative to the total weight of the at
least one reducing composition.
32. The method according to claim 31, wherein the at least one
reducing agent is present in an amount ranging from 0.5 to 4% by
weight, relative to the total weight of the at least one reducing
composition.
33. The method according to claim 26, further comprising leaving
the at least one reducing composition on the hair fibers for a time
period ranging from 5 to 60 minutes before heating.
34. The method according to claim 33, further comprising leaving
the at least one reducing composition on the hair fibers for a time
period ranging from 5 to 30 minutes before heating.
35. The method according to claim 26, further comprising not
rinsing the hair fibers before heating the hair fibers.
36. The method according to claim 26, further comprising partially
pre-drying the hair fibers before heating the hair fibers.
37. The method according to claim 26, wherein the thiols are chosen
from aminothiols and non-aminated thiols.
38. The method according to claim 37, wherein the aminothiols are
chosen from cysteine and derivatives thereof and cysteamine and
derivatives thereof.
39. The method according to claim 37, wherein the non-aminated
thiols are chosen from thiolactic acid and esters thereof,
thioglycolic acid and esters thereof, and thioglycerol.
40. The method according to claim 37, wherein the thiols are in
salts form.
41. The method according to claim 26, wherein the at least one
reducing composition comprises at least one solvent chosen from
water, C.sub.1-C.sub.6 alcohols, polyhydric alcohols, benzyl
alcohol, polyol ethers, C.sub.2-C.sub.6 esters, N-methylpyrrolidone
(NMP), and C.sub.3-C.sub.6cetones.
42. The method according to claim 41, wherein the C.sub.1-C.sub.6
alcohols are alkanols chosen from ethanol, propanol, and
isopropanol.
43. The method according to claim 42, wherein polyhydric alcohols
are chosen from propyleneglycol, pentanediol, and glycerine.
44. The method according to claim 26, wherein the at least one
reducing composition comprises at least one cosmetic additive
chosen from volatile and non volatile, linear and cyclic silicones;
cationic, non ionic, anionic, and amphoteric polymers; peptides and
derivatives thereof; protein hydrolyzates; waxes; swelling agents
and penetrating agents; agents that are able to increase the
efficiency of the at least one reducing agent; anionic, cationic,
non ionic, amphoteric, and zwitterionic surfactants; active agents
combating hair loss; anti-dandruff agents; natural and synthetic,
associative and unassociative thickeners; suspension agents;
sequestering agents; opacifying agents; dyes; sunscreen agents;
vitamins and provitamins; fatty acids; fatty alcohols; mineral,
vegetable and synthetic oils; and fragrances and preserving
agents.
45. The method according to claim 44, wherein the cationic polymers
are chosen from hexadimethrine chloride and dimethyldiallylammonium
chloride homopolymers and copolymers.
46. The method according to claim 26, wherein the at least one
reducing composition is provided in a form chosen from an
optionally thickened lotion, a cream, a gel, and a foam.
47. A method for treating hair fibers to change the shape of the
hair fibers without excessively altering the hair color and/or
without excessively damaging the hair fibers, said method
comprising: applying to the hair fibers at least one reducing
composition, free of ceramide, comprising at least one reducing
agent, wherein the at least one reducing agent is chosen from
thiols and wherein when the at least one reducing composition does
not comprise at least one aminothiol compound, the at least one
reducing agent is present in an amount of less than 3% by weight,
relative to the total weight of the at least one reducing
composition, when the at least one reducing composition does
comprise at least one aminothiol compound, the at least one
reducing agent is present in an amount of less than 5% by weight,
relative to the total weight of the at least one reducing
composition, and applying a heating iron to the hair fibers to
raise the temperature of said hair fibers, wherein said heating
iron has a temperature ranging from 120.degree. C. to 220.degree.
C., and wherein the heating iron is applied before or after the
hair fibers are optionally rinsed, and thus changing the shape of
the hair fibers without excessive alteration of the hair color
and/or without excessive damage to the hair fibers, and without a
fixing step.
48. The method according to claim 26, wherein: when the at least
one reducing composition does not comprise at least one aminothiol
compound, the at least one reducing agent is present in an amount
of 1.1% or less by weight, relative to the total weight of the at
least one reducing composition; and when the at least one reducing
composition comprises at least one aminothiol compound, the at
least one reducing agent is present in an amount of 1.4% or less by
weight, relative to the total weight of the at least one reducing
composition.
Description
[0001] This application claims benefit of U.S. Provisional
Application No. 60/571,922, filed May 18, 2004, and French Patent
Application No. 04 50667, filed Apr. 2, 2004, both of which are
hereby incorporated by reference.
[0002] Disclosed herein is a method for treating hair fibers by
applying a reducing composition and then heating the hair with a
heating iron.
[0003] The usual practice to permanently reshape hair comprises
first opening the keratin disulfide bonds (cystine) with a
composition comprising a reducing agent. The disulfide bonds are
then re-formed, optionally after rinsing the hair, by applying to
the hair, which has been straightened or placed beforehand under
tension with suitable means such as curlers or the equivalent, an
oxidizing composition also called a fixing solution, so as to give
the desired form to the hair. This method results in the waving of
the hair, the uncurling of the hair, the backcombing of the hair,
or the straightening of the hair.
[0004] Reducing compositions that can be used to carry out the
first step of this method generally comprise compounds comprising a
thiol group, such as thioglycolic acid, cysteine, cysteamine,
thiolactic acid, and glycerol monothioglycolate.
[0005] The reducing agent concentration may be very high, often up
to 15% by weight, relative to the total weight of the reducing
composition.
[0006] Nevertheless, such a method may not be fully satisfactory.
While it is very efficient to reshape the hair, it may cause great
damage to the hair fibers.
[0007] Moreover, it has been suggested to raise the hair
temperature between the reducing step and the fixing step by means
of a heating iron.
[0008] For example, Patent Application No. JP 2000 256 146
describes a process to permanently reshape the hair, comprising the
application of a cosmetic composition comprising from 2 to 11%
reducing agents and from 0.2 to 4% diammonium dithiodiglycolate.
After the reducing composition is applied, a heating iron is used
at a temperature from 60 to 220.degree. C.
[0009] Such a process nevertheless implies a post-iron fixing step
as well, which increases the treatment time.
[0010] Moreover, the resulting shape is irreversible. The
difference between the parts of the hair that have been treated and
the hair roots is very noticeable as the hair regrows.
[0011] Finally, if the treatment is conducted on colored hair, it
frequently causes the hair color to fade as a result of the
treatment.
[0012] Thus, it would be desirable to provide a hair fiber treating
method that compensates for at least one of the drawbacks of the
prior art. For example, it would be desirable to provide a method
that changes the hair fiber behavior while limiting the damage
caused to the hair, controls the hair volume, and enhances at least
one of the cosmetic benefits provided to the hair, for example,
softness, shine and ease of combing, while also better preserving
colored hair shades. Such a method would also ideally preserve the
natural aspect of the hair so as to limit the so-called `root
effect`, that is to say the contrast between the parts which have
been treated and the roots, and also ideally reduce the hair fiber
treating time and obtain long-lasting results.
[0013] The present inventors have found that it is possible to
counteract at least one of the drawbacks of the prior art and to
achieve at least one of the desirable results listed above, by
carrying out a hair fiber treating method without fixing the hair,
comprising applying to the hair fibers at least one reducing
composition comprising at least one reducing agent chosen from
compounds comprising at least one thiol group, wherein the at least
one reducing agent is present in an amount of less than 3% by
weight, relative to the total weight of the at least one reducing
composition, and wherein the at least one reducing composition does
not comprise an aminothiol compound or if the composition does
comprise at least one aminothiol compound, it is present in an
amount of less than 5% by weight, relative to the total weight of
the at least one reducing composition, and raising the temperature
of the hair fiber using a heating iron at a temperature of at least
60.degree. C., wherein the temperature of the hair fiber is raised
before or after the hair fibers are optionally rinsed.
[0014] Thus, disclosed herein is a method of treating hair fibers
without fixing the hair, comprising: [0015] applying to the hair
fibers at least one reducing composition, free of ceramide,
comprising at least one reducing agent chosen from thiols, wherein
the at least one reducing agent is present in an amount of less
than 3% by weight, relative to the total weight of the at least one
reducing composition, provided that the at least one reducing
composition does not comprise an aminothiol compound or if the at
least one reducing composition does comprise at least one
aminothiol compound, it is present in an amount of less than 5% by
weight, relative to the total weight of the at least one reducing
composition and [0016] applying to the hair fibers a heating iron
at a temperature of at least 60.degree. C. to raise the temperature
of the fibers, wherein the temperature of the hair fiber is raised
before or after the hair fibers are optionally rinsed.
[0017] As used herein, `without fixing the hair` or `without a
hair-fixing step` means without any additional application of a
composition comprising a chemical oxidizing agent, such as hydrogen
peroxide or a bromate.
[0018] The at least one reducing composition may have a pH of less
than or equal to 9, provided that the at least one reducing
composition does not comprise an aminothiol compound.
[0019] In one embodiment, the at least one reducing composition
does not comprise dithiodiglycolic acid or any salt thereof.
[0020] The at least one reducing composition may, for example, be
applied onto wet and clean hair fibers.
[0021] As used herein, `aminothiol compound` means a thiol
comprising at least one NH moiety.
[0022] The thiols used as the at least one reducing agent may, for
example, be chosen from aminothiols, such as cysteine and
derivatives thereof, i.e., N-acetylcysteine, cysteamine and
derivatives thereof, C.sub.1-C.sub.4 acylated derivatives thereof,
such as N-acetyl cysteamine and N-propionyl cysteamine, and
non-aminated thiols, such as thiolactic acid and esters thereof,
such as glycerol monothiolactate, thioglycolic acid and esters
thereof, such as glycerol and glycol monothioglycolate, and
thioglycerol.
[0023] When the thiol comprises at least one carboxylic acid
functional group, the thiol may be provided, if needed, in the form
of at least one salt thereof, such as alkali metal or ammonium
salts. In one embodiment, ammonium thioglycolate may be used. When
the thiol has an amine moiety, the thiol may be provided, if
needed, in the form of at least one salt thereof, such as
aminothiol halogenides. In one embodiment, L-cysteine hydrochloride
may be used.
[0024] Examples of aminothiols that may be used in the at least one
reducing composition include sugar N-mercapto-alkyl amides, such as
N-(mercapto-2-ethyl)-gluconamide, pantheteine, and
N-(mercaptoalkyl)-.OMEGA.-hydroxyalkyl amides such as those
described in Patent Application No. EP-A-354 835 and N-mono- and
N,N-dialkylmercapto 4-butyramides, such as those described Patent
Application No. EP-A-368 763, aminomercaptoalkyl amides, such as
those described Patent Application No. EP-A-432 000 and
alkylaminomercaptoalkyl amides such as those described in Patent
Application No. EP-A-514 282. Examples of non-aminated thiols that
may be used include a mixture of hydroxy-2-propyl thioglycolate
(2/3) and hydroxy-2 methyl-1 ethyl thioglycolate (67/33) described
in Patent Application No. FR-A-2 679 448, .beta.-mercaptopropionic
acid and derivatives thereof, and thiomalic acid.
[0025] The total concentration of thiols in the at least one
reducing composition is as follows:
[0026] when the at least one reducing composition comprises at
least one aminothiol compound, the total concentration of thiols is
less than 5% by weight, such as from 0.1 to 5% by weight, or
further from 0.5 to 4% by weight, relative to the total weight of
the at least one reducing composition, or
[0027] when the at least one reducing composition does not comprise
at least one aminothiol compound, the total concentration of thiols
is less than 3% by weight, such as from 0.1% to 3% by weight and,
further, for example, from 0.5% to 3% by weight relative to the
total weight of the at least one reducing composition
[0028] The pH of the at least one reducing composition may be
adjusted by means of at least one agent chosen from alkaline agents
and acidifying agents. The alkaline agents may, for example, be
chosen from ammonia; organic amines, such as monoethanolamine,
diethanolamine, triethanolamine, 1,3-propanediamine, and
2-amino-2-methyl-1-propanol; alkaline and ammonium carbonate or
bicarbonate; organic carbonate, such as guanidine carbonate;
alkaline hydroxide, such as soda. The acidifying agents may, for
example, be chosen from hydrochloric acid, acetic acid, lactic
acid, oxalic acid. and boric acid.
[0029] The at least one reducing composition may, for example,
comprise at least one cosmetically acceptable solvent chosen, for
example, from water, C.sub.1-C.sub.6 alcohols, for example,
alkanols such as ethanol, propanol, and isopropanol; polyhydric
alcohols, such as propyleneglycol, pentanediol and glycerine;
benzyl alcohol; polyol ethers; C.sub.2-C.sub.6 esters;
N-methylpyrrolidone (NMP); and C.sub.3-C.sub.6cetones.
[0030] In order to improve at least some of the cosmetic properties
of the present hair compositions, the at least one reducing
composition may also comprise at least one cosmetic additive.
[0031] The at least one cosmetic additive may, for example, be
chosen from volatile and non volatile, linear and cyclic silicones;
cationic, non ionic, anionic and amphoteric polymers; peptides and
derivatives thereof; protein hydrolyzates; waxes; swelling agents
and penetrating agents; agents that are able to increase the
efficiency of the at least one reducing agent, such as a
SiO.sub.2/polydimethylsiloxane mixture, dimethylisosorbitol, urea
and derivatives thereof; anionic, cationic, non ionic, amphoteric,
and zwitterionic surfactants; active agents for combating hair
loss; anti-dandruff agents; natural and synthetic, associative and
unassociative thickeners; suspension agents; sequestering agents;
opacifying agents; dyes; sunscreen agents; vitamins and
provitamins; fatty acids; fatty alcohols; mineral, vegetable, and
synthetic oils; and fragrances and preserving agents.
[0032] As used herein, `cationic polymer` means any polymer
comprising cationic moieties and/or moieties that are ionizable to
cationic moieties.
[0033] Examples of cationic polymers include polyamine,
polyaminoamide and quaternary polyammonium type-polymers, which are
known products.
[0034] Polyamine, polyaminoamide and quaternary polyammonium
type-polymers suitable for use in the at least one reducing
composition are those, for example, described in French Patent Nos.
FR 2 505 348 and FR 2 542 997. These polymers may be chosen from at
least one of the following: [0035] (1) homopolymers or copolymers
derived from acrylic or methacrylic acid esters or amides; [0036]
(2) cellulose ether derivatives comprising quaternary ammonium
moieties described in French Patent No. FR 1 492 597; [0037] (3)
cationic cellulose derivatives, such as cellulose copolymers or
cellulose derivatives grafted onto a water-soluble quaternary
ammonium monomer, and described, for example, in U.S. Pat. No.
4,131,576, such as hydroxyalkylcelluloses, i.e. hydroxymethyl-,
hydroxyethyl- and hydroxypropyl-cellulose, for example, grafted
onto a methacryloylethyl-trimethylammonium salt, a
methacrylamidopropyl-trimethylammonium salt or a
dimethyldiallylammonium salt; for example, polyquatemium 10 (INCl
denomination); [0038] (4) other cationic polysaccharides described,
for example, in U.S. Pat. Nos. 3,589,578 and 4,031,307, such as
guar gums comprising trialkylammonium cationic moieties; [0039] (5)
polymers comprising piperazinyl moieties and linear or branched
chain alkylene or hydroxyalkylene divalent groups, wherein the
chains are optionally interrupted by at least one atom chosen from
oxygen, sulphur, and nitrogen atoms or by aromatic or heterocyclic
rings, as well as oxidation and/or quatemization products of these
polymers. Such polymers are described, for example, in French
Patent Nos. FR 2 162 025 and FR 2 280 361; [0040] (6) water-soluble
polyaminoamides, such as those, for example, described in French
Patent Nos. FR 2 252 840 and FR 2 368 508; [0041] (7)
polyaminoamide derivatives, such as adipic
acid/dialkylaminohydroxyalkyl dialkylene-triamine polymers, wherein
the alkyl group comprises from 1 to 4 carbon atoms and is chosen,
for example, from methyl, ethyl, and propyl groups, wherein the
alkylene group comprises from 1 to 4 carbon atoms and may, for
example, be an ethylene group. Such polymers are described, for
example, in French Patent No. FR 1 583 363. [0042] (8) polymers
resulting from the reaction of a polyalkylene-polyamine comprising
two primary amine moieties and at least one secondary amine moiety,
with a dicarboxylic acid chosen from diglycolic acid and saturated
aliphatic dicarboxylic acids comprising from 3 to 8 carbon atoms.
The molar ratio between polyalkylene-polyamine and dicarboxylic
acid ranging from 0.8:1 and 1.4:1; wherein the polyaminoamide
resulting from such reaction is reacted with epichlorhydrine in a
molar ratio of epichlorhydrine to secondary amine moiety of the
polyaminoamide ranging from 0.5:1 to 1.8: 1. Such polymers are
described, for example, in U.S. Pat. Nos. 3,227,615 and N.degree.
2,961,347; [0043] (9) alkyldiallylamine and dialkyldiallylammonium
cyclopolymers, such as dimethyldiallylammonium chloride homopolymer
and diallyldimethylammonium chloride and acrylamide copolymers;
[0044] (10) quaternary diammonium polymers having a number average
molecular weight typically ranging from 1000 to 100000, such as
those described, for example, in French Patent Nos. FR 2 320 330, 2
270 846, 2 316 271, 2 336 434, and 2 413 907 and in U.S. Pat. Nos.
2,273,780, 2,375,853, 2,388,614, 2,454,547, 3,206,462, 2,261,002,
2,271,378, 3,874,870, 4,001,432, 3,929,990, 3,966,904, 4,005,193,
4,025,617, 4,025,627, 4,025,653, 4,026,945 and 4,027,020;
hexadimethrine chloride (INCI denomination) commercially marketed
by CHIMEX under the trade name MEXOMERE PO is another example;
[0045] (11) quaternary polyammonium polymers, such as those
described in Patent Application No. EP-A-122 324; [0046] (12)
vinylpyrrolidone and vinylimidazole quaternary polymers, such as
products commercially marketed under the trade names Luviquat.RTM.
FC 905, FC 550 and FC 370 by B.A.S.F; [0047] (13) polyamines such
as Polyquart.RTM. H commercially marketed by HENKEL, registered
under the name `POLYETHYLENEGLYCOL (15) TALLOW POLYAMINE` in the
CTFA dictionary; and [0048] (14)
methacryloyloxyalkyl(C.sub.1-C.sub.4)
trialkyl(C.sub.1-C.sub.4)ammonium salt branched polymers, such as
those commercially marketed under the trade names SALCARE.RTM. SC
92, SALCARE.RTM. SC 95 and SALCARE.RTM. SC 96 by ALLIED
COLLOIDS.
[0049] Other cationic polymers that can be used include cationic
proteins or cationic protein hydrolyzates, polyalkyleneimines, for
example, polyethylene imines, polymers with vinyl pyridine or vinyl
pyridinium moieties, polyamine and epichlorhydrine condensation
products, quatemary polyureylenes, and chitin derivatives.
[0050] In one embodiment, the cationic polymers may be chosen from
hexadimethrine chloride and dimethyldiallylammonium chloride
homopolymers and copolymers.
[0051] As explained above, the at least one cosmetic additive may
also be chosen from silicones.
[0052] Silicones that are suitable for use as the at least one
cosmetic additive include polydimethylsiloxanes; quatemized
polyorganosiloxanes, such as those described in French Patent
Application No. FR 2 535 730; polyorganosiloxanes comprising
alkoxycarbonylalkyl moieties modified with aminoalkyl moieties,
such as those described in U.S. Pat. No. 4,749,732;
polyorganosiloxanes, such as polydimethylsiloxane-polyoxyalkyl
copolymer of dimethicone copolyol; a polydimethylsiloxane with
stearoxy (stearoxy dimethicone) end groups; a
polydimethylsiloxane-dialkylammonium acetate copolymer and a
polydimethyl-siloxane polyalkylbetaine copolymer described in
British Patent No. GB 2,197,352; and organo polysiloxanes modified
by mercapto or mercaptoalkyl moieties such as those described in
French Patent No. FR 1 530 369 and in European Patent Application
No. EP 295 780.
[0053] Moreover, the at least one cosmetic additive may also be
chosen from fatty acids and fatty alcohols.
[0054] The fatty acids may, for example, be chosen from
C.sub.8-C.sub.30 carboxylic acids, such as palmitic acid, oleic
acid, linoleic acid, myristic acid, stearic acid, lauric acid, and
mixtures thereof.
[0055] The fatty alcohols may, for example, be chosen from
C.sub.8-C.sub.30 alcohols, such as palmityl, oleyl, linoleyl,
myristyl, stearyl, and lauryl alcohols.
[0056] The at least one reducing composition used in the method
disclosed herein may be provided in a form chosen from an
optionally thickened lotion, a cream, a gel, and a foam.
[0057] The method disclosed herein comprises applying the at least
one reducing composition as defined above to hair fibers. Once the
at least one reducing composition has been applied, it can be left
on the hair fibers, optionally under a drying helmet, for a time
period ranging from 5 to 60 minutes, for example, from 5 to 30
minutes.
[0058] As explained above, the method further comprises, after
applying the reducing composition, optionally rinsing the hair
fibers, then raising the temperature of the hair fibers, with a
heating iron at a temperature of at least 60.degree. C.
[0059] As used herein, `iron` means any heating device which
functions by contacting the hair fibers.
[0060] The end of the iron coming into contact with the hair may
have various forms. It may, for example, have a plane surface, such
as a flat iron. It may also have a rounded surface, such as a round
iron.
[0061] The iron may be applied proceeding by successive separated
touches for a few seconds or by gradually moving or sliding along
hair locks.
[0062] All types of flat or round irons may be given as non
limitative examples of suitable irons for use in the method
disclosed herein, for example, those described in U.S. Pat. Nos.
4,103,145; 4,308,878; 5,983,903; 5,957,140; 5,494,058; and
5,046,516.
[0063] The hair fiber temperature may be raised at a temperature
ranging from 60.degree. C. to 250.degree. C., such as from
120.degree. C. to 220.degree. C.
[0064] According to one embodiment, the hair fibers are not rinsed
out before heat is applied in the form of the heating iron for
raising the temperature of the hair fibers.
[0065] The method disclosed herein may also include partially
pre-drying the hair fibers before raising the temperature of the
hair fibers, so as to prevent any substantial steam development
that might bum the hands of the hair stylist and the scalp of the
user. This pre-drying may be done, for example, by using a hair
drier, a hood, or it is also possible to let the hair dry
naturally.
[0066] Further disclosed herein is a method as described herein to
durably change the hair shape without excessively altering the hair
color and/or without excessively damaging the hair fibers.
[0067] Other than in the operating examples, or where otherwise
indicated, all numbers expressing quantities of ingredients,
reaction conditions, and so forth used in the specification and
claims are to be understood as being modified in all instances by
the term "about." Accordingly, unless indicated to the contrary,
the numerical parameters set forth in the specification and
attached claims are approximations that may vary depending upon the
desired properties sought to be obtained by the present invention.
At the very least, and not as an attempt to limit the application
of the doctrine of equivalents to the scope of the claims, each
numerical parameter should be construed in light of the number of
significant digits and ordinary rounding approaches.
[0068] Notwithstanding that the numerical ranges and parameters
setting forth the broad scope of the invention are approximations,
the numerical values set forth in the specific example are reported
as precisely as possible. Any numerical value, however, inherently
contains certain errors necessarily resulting from the standard
deviation found in their respective testing measurements.
[0069] The following examples are intended to illustrate the
invention in a non-limiting manner.
EXAMPLES
[0070] The hair fiber treating method disclosed herein was carried
out using a reducing composition.
[0071] Tested reducing compositions were as follows:
Reducing Composition 1
TABLE-US-00001 [0072] L-Cysteine 1.4 g MEXOMERE PO 2.5 g
2-amino-2-methyl-1-propanol qs pH 9 Demineralized water qs 100
g
Reducing Composition 2
TABLE-US-00002 [0073] Thioglycolic acid 1.1 g MEXOMERE PO 2.5 g
2-amino-2-methyl-1-propanol qs pH 9 Demineralized water qs 100
g
Reducing Composition 3
TABLE-US-00003 [0074] L-Cysteine 1.4 g Thioglycolic acid 0.3 g
MEXOMERE PO 2.5 g 2-amino-2-methyl-1-propanol qs pH 9 Demineralized
water qs 100 g
Reducing Composition 4
TABLE-US-00004 [0075] L-Cysteine 1.4 g 2-amino-2-methyl-1-propanol
qs pH 9 Demineralized water qs 100 g
[0076] Tests were conducted on colored, naturally curling hair.
[0077] A reducing composition such as previously described was
applied onto the hair and left on for 5 minutes.
[0078] The hair was then partially pre-dried using a hair drier
before being treated using a flat iron heated to 180.degree. C.
[0079] As a result, the hair fiber showed a good texture, a well
controlled volume, a good respect of the color and a long term
durability of the effects.
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