Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
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HAIR TREATMENT COMPOSITION
FIELD OF THE INVENTION
This invention relates to hair treatment compositions,
containing precursors of hair integral lipid fatty acids and
the use of the compositions for enhancing physical properties
of the hair fibre such as in particular shine, smoothness,
manageability, softness and cuticle integrity.
BACKGROUND OF THE INVENTION
Branched and straight chain integral lipids are believed to
play an important role in the structure and integrity of the
hair fibre, especially with respect to its surface properties.
The lipids are present at the fibre surface, bound to the
surface membrane and in the cell membrane complex, and are
believed to contribute to fibre shine, smoothness,
manageability, softness, protection, lubrication and cuticle
integrity.
Surface integral lipids are lost from fibres due to physical
and chemical damage incurred inter alia through washing, harsh
styling treatments and weathering. This loss has been found
to increase fibre roughness and decrease shine. The C21
branched fatty acid - 18-methyleicosanoic acid is thought to
be a particularly important component in the lipid profile of
the hair. Fatty acid analysis of hair from people with maple
syrup urine disease (MSUD) shows that there is only a very
small amount of 18-methyleicosanoic acid present, compared to
that found in normal controls. The same analysis also
indicates that there were decreases in other branched chain
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fatty acids (C17:Obr, Cl9:Obr, C20:Obr). There was also an
increase in unbranched saturated fatty acids (C16:0, C18:0,
C20:0, C22:0 and C24:0) [Jones et al, Journal of Investigative
Dermatology, 104(4) 1995, 688]. Hairs from patients with MSUD
show a structural defect in lhe fibre cuticle.
EP-A- O 483 689 relates to a hair cosmetic composition
incorporating fatty acid with a specific type of branched
chain, in particular 18-methyleicosanoic acid (hereinafter
referred to as 18-MEA) and salts and esters thereof. The
compositions are said to prevent damage to hair such as split
ends, and give soft, smooth and glossy conditioning effects.
However, the branched fatty acids must be obtained either by
the separation and extraction from hair or by a multistep
chemical process as described in EP-A-O 483 689 involving
subjecting appropriate phosphonium salt and aldehyde
precursors to the Wittig reaction followed by reduction and
hydrolysis.
Straight chain fatty acids such as palmitic acid, have also
been added to hair treatment: compositions to improve hair
properties.
Exogenous application of free straight or branched chain fatty
acid via hair treatment compositions as described above has
several disadvantages. Firstly, there is the cost of
extraction of the materials from natural sources or chemical
synthesis. Moreover, free fatty acids supplied exogenously do
not become integral and strongly bound to the fibre, in
contrast to the natural ones which are only extractable from
the fibre by alkaline hydrolysis. Natural hair integral lipids
may be covalently bonded to the fibre by a thioester linkage
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or derivatised into further essential constituents of the
fibre such as phospholipids and ceramides.
We have now found that cultured hair follicles can synthesise
branched and straight chain fatty acids such as 18-MEA and
palmitic, stearic and myristic acid if supplied with specific
nutrients which are carbon donors for fatty acid chain
elongation. These specific nutrients are selected from
particular amino acids, sugars, and organic carboxylic acids
and their salts.
Amino acids are known to be important for the nourishment of
the human hair root and the ~rowth of human hair.
GB 1 401 089 describes hair treatment compositions containing
natural amino acids or protein hydrolyates. Particularly
preferred are glycine, glutamic acid, aspartic acid, lysine,
serine and alanine, for the reason that these amino acids are
naturally found combined, in the form of polypeptides, in the
substances collagen and keratin which occur as structural
components of human skin and hair. A shampoo composition is
described which incorporates protein hydrolysates resulting
from the complete hydrolysis of collagen.
EP 0 186 025 discloses cosmetic preparations for care of skin
and hair with a hydrolysate of almond protein. Almond protein
is characterised by a high content of acidic and basic amino
acids and contains 40-50 wt% glutamic acid, aspartic acid and
arginine.
Numerous publications describe the use of an array of amino
acids, often in Hcocktail" form, in lotions or tonics for
topical application to cure baldness and other skin, scalp and
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hair disorders. Examples of such disclosures are JP 59/007,111
which relates to a hair cosmetic with dandruff-preventing
properties containing vitamin E acetate and methionine, CA
888,689 which describes hair and scalp preparations for
normalisation of scalp secretions and promotion of hair growth
which may contain, inter alia, cysteine and methionine in a
base incorporating bergamot oil and nonionic emulsifier, and
WO 92/00720 which describes a composition containing L-
leucine, L-isoleucine and L-valine, said to stimulate growth
and regeneration of hair and nails.
The prior art discussed above does not address the
biosynthesis of hair integral lipid fatty acids in hair
follicles.
SUM~L~RY OF THE INVENTION
The present invention provides a hair treatment composition
for the supply of precursors of hair integral lipid fatty
acids to the hair follicle comprising:
(i) a first fatty acid precursor which is an amino acid
selected from leucine, isoleucine, methionine and valine, and
mixtures thereof, which precursor is present at levels of
from 0.01 to 20% by weight based on the total weight of the
composition, and from 20% to 100% by weight based on the total
weight of amino acids present in the composition,
(ii) from 0.01% to 20% by weight of a second fatty acid
precursor selected from sugars, mono-, di-, and tri-
- carboxylic acids and salts thereof, which second fatty acid
precursor is able to donate a two or three-carbon unit for
fatty acid chain elongation,
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(iii) at least one surfactant selected from anionic,
amphoteric, zwitterionic and cationic surfactants and mixtures
thereof.
DETAILED DESCRIPTION OF THE lNV~ lON
Isoleucine is the most preferred amino acid (i) for
compositions of the invention. It is thought, whilst not
wishing to be bound by any theory, that this is the most
direct precursor for 18-MEA synthesis in the hair follicle,
18-MEA being a particularly important component in the lipid
profile of the hair fibre. Some proposed biochemical pathways
have been given in the literature but are not yet well
elucidated.
The amino acid (i) is thought to supply the branch point for
hair integral lipid branched chain fatty acid. It may also be
catabolized in the hair follicle to form precursors of hair
integral lipid straight chain fatty acids.
Simple derivatives of the amino acid (i) may be employed, such
as salts and hydrosalts. It is further possible to employ
other derivatives such as acyl, ester and peptide derivatives.
These too may be used as salts or hydrosalts.
Examples are N-alkanoyl derivatives in which the alkanoyl
moiety has an alkyl chain length of from 3 to 20 carbon atoms,
preferably from 4 to 10 carbon atoms, eg N-butanoyl, N-
hexanoyl and N-octanoyl, N-alkyl or COO-alkyl derivatives in
which the alkyl group is straight chain and from 1 to 20
carbon atoms, preferably from 1 to 4 carbon atoms, eg methyl,
ethyl and n-propyl and peptide derivatives in which the
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peptide residue comprises from 2 to 8 amino acid residues or
substituted amino acid residues.
Mixtures of amino acids may be used, such as may be obtained
from a protein hydrolysate. However, such a mixture must be
judiciously selected to ensure that from 20% to 100~ by weight
based on the total weight of amino acids present in the
resultant composition is constituted by one or a mixture of
the specific amino acids (i).
Preferably, from 90~ to 100% by weight based on the total
weight of amino acids present in the resultant composition is
consituted by one or a mixture of the specific amino acids
(i). a single amino acid of the amino acids (i) is used. Most
Component (ii) is a second fatty acid precursor selected from
sugars, mono-, di-, and tri-carboxylic acids and salts
thereof, which second fatty acid precursor is able to donate
a two or three-carbon unit for fatty acid chain elongation.
The two or three carbon unit itself may be sourced directly
from the molecule, or derived indirectly through catabolism of
the molecule.
Examples of sugars for component (ii) are sucrose, fructose
and glucose. Glucose is particularly preferred. Examples of
mono-, di-, and tri-carboxylic acids are acetic acid, malonic
acid, lactic acid, citric acid, and propionic acid. Suitable
salts of these acids are those from which the a two or three-
carbon unit for fatty acid chain elongation can be derived
from the acid moiety in a bioavailable form. Examples of such
salts are the water-soluble alkali metal, alkaline earth metal
and ammonium salts (including substituted ammonium salts) of
these acids.
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We have shown that these components (ii) when used alone can
contribute to straight chain fatty acid biosynthesis in the
hair follicle. Two (eg acetate, lactate) and three (eg
propionate) carbon donors are thought to yield even and odd
carbon chain number fatty acids respectively via chain
elongation.
In combination with the amino acid component (i), precursors
for straight and branched chain fatty acids can be supplied
(the amino acid moiety supplying the branch point as discussed
above), which is advantageous since key hair integral lipids
have been found to derive from both straight and branched
chain fatty acids.
The total amount of amino acid (i) and carbon donor (ii)in the
compositions of the invention ranges from 0.01% to 20% by
weight of the composition, preferably from 0.02% to 5%, most
preferably from 0.05% to 2% for either active.
The ratio of components (i) to (ii) is such as to obtain a
complementary action of amino acid and carbon donor so as to
supply a suitable balance of straight and branched chain fatty
acid precursors. The particular ratio will depend on the hair
condition and the specific actives employed. The ratio of (i)
to (ii) is generally in the range of 10:1 to 1:10, preferably
3:1 to 1: 3, most preferably 1:1.
Advantageously, the composition of the invention can be
formulated as a shampoo and will then accordingly comprise one
or more cleansing surfactants which are cosmetically
~' acceptable and suitable for topical application to the hair.
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Suitable cleansing surfactants, which may be used singularly
or in combination, are selected from anionic, amphoteric and
zwitterionic surfactants, and mixtures thereof.
Examples of anionic surfactants are the alkyl sulphates, alkyl
ether sulphates, alkaryl sulphonates, alkanoyl isethionates,
alkyl succinates, alkyl sulphosuccinates, N-alkyl
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.
Typical anionic surfactants for use in shampoos of the
invention include sodium oleyl succinate, ammonium lauryl
sulphosuccinate, ammonium lauryl sulphate, sodium
dodecylbenzene sulphonate, triethanolamine dodecylbenzene
sulphonate, sodium cocoyl isethionate, sodium lauryl
isethionate and sodium N-lauryl sarcosinate. The most
preferred anionic surfactants are sodium lauryl sulphate,
triethanolamine monolauryl phosphate, sodium lauryl ether
sulphate 1 EO, 2EO and 3EO, ammonium lauryl sulphate and
ammonium lauryl ether sulphate lEO, 2EO and 3EO.
Examples of amphoteric and zwitterionic surfactants 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
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groups have from 8 to 19 carbon atoms. Typical amphoteric and
zwitterionic surfactants for use in shampoos of the invention
include lauryl amine oxide, cocodimethyl sulphopropyl betaine
and preferably lauryl betaine, cocamidopropyl betaine and
sodium cocamphopropionate.
The cleansing surfactant(s) ~lay be present in shampoo
compositions of the invention in a total amount of from about
1 to about 40% by weight based on the total weight of the
shampoo composition, preferably from about 2 to about 30% by
weight, optimally from about 10% to 30% by weight.
The shampoo can also include nonionic surfactants to help
impart aesthetic, physical or cleansing properties to the
composition. The nonionic surfactant can be included in an
amount ranging from 0% to about 5% by weight based on total
weight.
For example, representative nonionic surfactants that can be
included in shampoos of the invention include condensation
products of aliphatic (C8 - Cl8) 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 representative nonionics include mono- or di-alkyl
alkanolamides. Examples include coco mono- or di-ethanolamide
and coco mono-isopropanolamide.
Further nonionic surfactants which can be included in shampoos
'~ for the invention are the alkyl polyglycosides (APGs).
Typically, the APG is one which comprises an alkyl group
connected (optionally via a bridging group) to a block of one
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or more glycosyl groups. Preferred APGs are defined by the
following formula:
RO - (G) n
wherein R is a branched or straight chain alkyl group which
may be saturated or unsaturated and G is a saccharide group.
R may represent a mean alkyl chain length of from about C5 to
about C20. Preferably R represents a mean alkyl chain length
of from about C8 to about Cl2. Most preferably the value of R
lies between about 9.5 and about 10.5. G may be selected from
Cs or C6 monosaccharide residues, and is preferably a
glucoside. G may be selected from the group comprising
glucose, xylose, lactose, fructose, mannose and derivatives
thereof. Preferably G is glucose.
The degree of polymerisation, n, may have a value of from
about 1 to about 10 or more. Preferably, the value of n lies
in the range of from about 1.1 to about 2. Most preferably
the value of n lies in the range of from about 1. 3 to about
1.5.
Suitable alkyl polyglycosides for use in the invention are
commercially available and include for example those materials
identified as: Oramix NS10 ex Seppic; Plantaren 1200 and
Plantaren 2000 ex Henkel.
Likewise the composition can include other emulsifiers,
conditioning agents, inorganic salts, humectants and similar
materials to provide the composition with desirable aesthetic
or physical properties.
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Representative conditioning agents that can be included in
shampoos of the invention include silicones. Typically these
are present in the composition at a level of from 0.01% to
10~, preferably from 0.5 to 5~, by weight based on total
weight.
Silicones are particularly preferred conditioning agents for
hair. Representative silicones include volatile and non-
volatile silicones, such as for example polyalkylsiloxanes
(optionally end-capped with one or more hydroxyl groups),
polyalkylaryl siloxanes, siloxane gums and resins,
cyclomethicones, aminofunctional silicones, quaternary
silicones and mixtures thereof.
Preferred silicones include polydimethylsiloxanes (of CTFA
designation dimethicone) and hydroxylated
polydimethylsiloxanes (of CTFA designation dimethiconol).
Suitably the average particle size of the silicone in the
shampoo composition is less than 20 microns and preferably
less than 2 microns. Particle size may be measured by means
of a light scattering technique, using a 2600D Particle Sizer
from Malvern Instruments. The silicone is preferably
emulsion-polymerised, since this enables silicones of very
high viscosity to be more easily processed. The silicone can
be cross-linked.
Silicones of the above types are widely available
commercially, for example as DC-1784 and DCX2-1391, both ex
Dow Corning.
Shampoo compositions of the invention may also include a
polymeric cationic conditioning compound that is substantive
to the hair and imparts conditioning properties to the hair.
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The polymeric cationic conditioning compound will generally be
present at levels of from 0.01 to 5%, preferably from about
0.05 to 1%, more preferably from about 0.08% to about 0.5% by
weight. Synthetic or naturally derived polymers having a
quaternised nitrogen atom are useful. 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.
Representative synthetic quaternised polymers include, for
example: cationic 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, HCTFA". as Polyquaternium-16);
copolymers of 1-vinyl-2-pyrrolidine and dimethylaminoethyl
methacrylate (referred to in the industry by CTFA as
Polyquaternium-11); cationic diallyl quaternary ammonium-
containing polymers including, for example,
dimethyldiallylammonium chloride homopolymer (referred to in
the industry (CTFA) as Polyquaternium 6); mineral acid salts
of amino-alkyl esters of homo-and co-polymers of unsaturated
carboxylic acids having from 3 to 5 carbon atoms, as described
in U.S. Patent 4,009,256; ancl cationic polyacrylamides as
described in WO95/22311.
Representative naturally-derived quaternised polymers include
quaternised cellulosic compounds and cationic guar gum
derivatives, such as guar hydroxypropyltrimonium chloride.
Examples are JAGUAR C-13S, JAGUAR C-15, and JAGUAR-C17,
commercially available from Meyhall in their JAGUAR trademark
series.
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The shampoo composition of the invention can also include
optional conditioning agents such as branched chain fatty
acids, such as 18-MEA, or straight chain fatty acids such as
palmitic, myristic and/or stearic acids. In general these
ingredients can be included in an amount ranging from 0% to
about 3~ by weight based on t:otal weight.
Compositions in accordance with the invention may also be
formulated as a hair conditioner for the treatment of hair
(typically after shampooing) and subsequent rinsing. Such
formulations will then accordingly comprise one or more
conditioning surfactants which are cosmetically acceptable and
suitable for topical application to the hair.
Suitable conditioning surfactants are selected from cationic
surfactants, used singly or in admixture. Examples include
quaternary ammonium hydroxides or salts thereof, e.g
chlorides.
Suitable cationic surfactants for use in hair conditioners of
the invention include cetyltrimethylammonium chloride,
behenyltrimethylammonium chloride, cetylpyridinium chloride,
tetramethylammonium chloride, tetraethylammonium chloride,
octyltrimethylammonium chloride, dodecyltrimethylammonium
chloride, hexadecyltrimethylammonium chloride,
octyldimethylbenzylammonium chloride,
decyldimethylbenzylammonium chloride,
stearyldimethylbenzylammonium chloride,
didodecyldimethylammonium chloride,
dioctadecyldimethylammonium chloride, tallowtrimethylammonium
chloride, cocotrimethylammonium chloride, and the
corresponding hydroxides thereof. Further suitable cationic
surfactants include those materials having the CTFA
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- ~4 -
designations Quaternium-5, Quaternium-31 and Quaternium-18.
Mixtures of any of the foregoing materials may also be
suitable. A particularly useful cationic surfactant for use
in hair conditioners of the invention is
cetyltrimethylammonium chloride, available commercially, for
example as GENAMIN CTAC, ex H~echst Celanese.
In hair conditioners of the invention, the level of cationic
surfactant is preferably from 0.01 to 10%, more preferably
0.05 to 5%, most preferably 0.1 to 2% by weight of the
composition.
Conditioners of the invention advantageously incorporate a
fatty alcohol material. The combined use of fatty alcohol
materials and cationic surfactants in conditioning
compositions is believed to be especially advantageous,
because this leads to the formation of a lamellar phase, in
which the cationic surfactant is dispersed.
Representative fatty alcohols comprise from 8 to 22 carbon
atoms, more preferably 16 to 20. Examples of suitable fatty
alcohols include cetyl alcohol, stearyl alcohol and mixtures
thereof.
The level of fatty alcohol materials is conveniently from 0.01
to 10%, preferably from 0.1 to 5% by weight of the
composition. The weight ratio of cationic surfactant to fatty
alcohol is suitably from 10:] to 1:10, preferably from 4:1 to
1:8, optimally from 1:1 to 1:4.
Conditioners of the invention can include other emulsifiers,
conditioning agents, inorganic salts, humectants and similar
materials to provide the composition with desirable aesthetic
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or physical properties. Silicones, as described above for
shampoo compositions, are particularly preferred conditioning
agents for hair.
As further optional components for inclusion in shampoo or
conditioner compositions of the invention, in addition to
water, may be mentioned the following conventional adjunct
materials known for use in cosmetic compositions: suspending
agents, thickeners, pearlescing agents, opacifiers, salts,
perfumes, buffering agents, colouring agents, emollients,
moisturisers, foam stabilisers, sunscreen materials,
antimicrobial agents, preservatives, antioxidants, natural
oils and extracts, propellants.
The compositions of the invention are primarily intended for
topical application to the hair and/or scalp of a human
subject to improve hair fibre surface properties such as
smoothness, softness, manageability, cuticle integrity, and,
in particular shine.
The invention accordingly provides the use of a composition as
defined above for enhancing at least one of the following hair
surface properties: shine, smoothness, manageability, softness
and cuticle integrity.
Components (i) and (ii) may also be used independently, in
suitable amounts as described above, in a hair treatment
composition to supply hair integral lipid fatty acid
precursors to the hair follicle.
Accordingly, the invention also provides the use of (i) or
(ii) in a hair treatment composition as hair integral lipid
fatty acid precursors for enhancing at least one of the
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following hair fibre surface properties: shine, smoothness,
manageability, softness and cuticle integrity.
The invention will now be further illustrated by the
following, non-limiting Examples.
EXAMPLE 1
Demonstration of incorporation of isoleucine into lipids by
human hair follicles in vitro
Human hair follicles were isolated by the method of Philpott
et al (1990, J Cell Sci 97: 463-470) and cultured in the
presence of radiolabelled isoleucine. The follicles were
incubated for 2 days at 37~C, 5% C02 in air and >95% humidity.
At the end of the total incubation period, the lipid content
of the follicles was extracted and analysed.
The results showed clearly that the major labelled species was
18MEA (The identity of the other radiolabelled species was not
determined.
EXAMPLE 2
Demonstration of incorporation of acetate into lipids by
human hair follicles in vitro
Follicles were isolated as described in example 1 and cultured
in the presence of radiolabelled acetate. The follicles were
incubated for 3 days in conditions stated above for example 1.
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At the end of the total incubation period, the lipid content
of the follicles was extracted and analysed.
The results showed clearly that the major labelled species (in
decreasing order of amount of radiolabel present) were;
palmitic, stearic, myristic, arachidic acids and 18-MEA. The
identity of the other species was not determined.
EXAMPLE 3
Demonstration of incorporation of glucose into lipids by
human hair follicles in vitro
Follicles were isolated as described in example 1 and cultured
in the presence of radiolabelled glucose. The follicles were
incubated for 2 days in conditions stated above for example 1.
At the end of the culture period, the lipids were extracted as
described above in example 1.
The results showed clearly that the major labelled species (in
decreasing order of amount of radiolabel) were: 18MEA,
palmitic and stearic acids.
EXAMPLES 4 and 5
The following formulations illustrate shampoo compositions
according to the invention.
Ingredient %(by weight based on total weight)
Ex.4 Ex.5
Sodium lauryl ether 20 20
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sulphate(2EO);70%active
Cocamidopropylbetaine 6.67 6.4
5 Sodium benzoate 0.5 0.5
Perfume 0.55 0-55
Vitamin E acetate 0.05 0.05
Titanium dioxide coated mica
(TIMIRON MP 1001 ex Merck) 0.2 0.2
Silicone emulsion 0. 8 0.4
15 (DC 1784 ex Dow Corning)
Guar hydroxypropyltrimonium 0.1 0.1
chloride (JAGUAR C13S ex Meyhall)
Citric acid 0.42 0.42
Sodium chloride 0.7 0.7
Sodium hydroxide 0.15 0.15
L-Isoleucine 0.1 0.1
D-Glucos e 0.1 0.1
CARBOPOL 9 80 0.4 0. 4
(Crosslinked polyacrylate
ex BF Goodrich)
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_ ~ g _
Water to 100% to 100%
The shampoos of Examples 4 and 5 were both opacified liquids
of viscosity 4000 to 6000 cps and pH 4.5 to 5.
S
EXAMPLES 6 and 7
The following formulations illustrate further shampoo
compositions according to the invention.
Ingredient %(by weic~ht based on total weight)
Ex.6 Ex.7
Sodium lauryl ether 20 20
sulphate(2EO);70%active
Cocamidopropylbetaine 6.67 6.66
Sodium benzoate 0.5 0.5
Perfume 0-55 0 55
Vitamin E acetate 0.05 0.05
Titanium dioxide coated mica
~TIMIRON MP 1001 ex Merck) 0.2
30 Silicone emulsion 4.0
(DC 1784 ex Dow Corning)
Guar hydroxypropyltrimonium 0.1 0.05
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chloride(JAGUAR C13S ex Meyhall)
Citric acid 0.5 0,5
5 Sodium chloride 0.8 0.8
Sodium hydroxide 0.2 0.05
L-Isoleucine 0.1 0.1
D-Glucose 0.1 0.1
CARBOPOL 980 0.4
(Crosslinked polyacrylate
15 ex BF Goodrich)
Water to 100% to 100%
The shampoos of Examples 6 and 7 were liquids of viscosity
3500 to 5000 cps and pH 4.5 t:o 5. Example 6 was opacified and
Example 7 was clear.
The shampoos of Examples 4-7 all imparted excellent shine and
smoothness to the hair.
EXAMPLES 8 and 9
The following formulations i:Llustrate post-wash hair
conditioning compositions according to the invention.
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Ingredient %(by weiyht based on total weight)
Ex.8 Ex.9
Cetyl trimethylammonium
5 chloride 2.4 2.4
Cetearyl alcohol 3.0 2. 3
Paraffin 52/54 1.00
Glyceryl stearate 0.7
Silicone emulsion 3.0 3.0
15 (DC 1784 ex Dow Corning)
Hydrophobically modified - 0.03
hydroxyethylcellulose
(POLYSURF 67 ex Aqualon)
Perfume 0.5 0-5
Vitamin E acetate 0.05 0.05
25 Preservative 0.2 0.2
Phenoxyethanol 0.4
L-Isoleucine 0.1 0.1
D-Glucose 0.1 0.1
Citric acid - 0.025
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Water to 100% to 100%
The conditioner of Example 8 had a pH of 4.5-5.0 and that of
Example 9 had a pH of 3.0 to 3.5. Both were opacified liquids
of viscosity 7000-11000 cps.
Both conditioners imparted excellent shine and smoothness to
shampooed hair.
