Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
2000-09-28
2002-05-07
Boyer, Charles (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S121000, C510S122000, C510S123000, C510S124000, C510S125000, C510S126000, C510S127000, C510S128000, C510S130000, C510S421000, C510S422000, C510S466000, C510S477000, C510S398000
Reexamination Certificate
active
06383993
ABSTRACT:
The present invention relates in general to compositions for washing keratin materials, based on a detergent surfactant, a cationic galactomannan gum and an acrylic terpolymer, as well as to a washing process using these compositions.
Cationic guar gums are used in patent application EP 0 686 024 to improve the rheological properties of compositions containing crosslinked polymers. They are often used in shampoo compositions for the cosmetic qualities they impart to sensitized hair.
However, it has been found that these cationic galactomannan gums often have the drawback of reducing the cosmetic performance qualities of natural hair, in particular by making it more charged.
There is thus a need for a detergent cosmetic composition, in particular a shampoo, which gives acceptable cosmetic performance qualities on keratin materials, i.e. in particular the hair and the scalp and more particularly on natural hair.
The Applicant has discovered, surprisingly, that it is possible to formulate compositions for washing keratin materials, in particular shampoos, improving the cosmetic properties of keratin materials, and in particular of natural hair, by using in these compositions a detergent surfactant and a cationic galactomannan gum combined with a specific acrylic terpolymer, defined below. Specifically, it has been found that the use of the said acrylic terpolymer in the compositions of the present invention improves the cosmetic properties of keratin materials and in particular of natural hair, particularly by making wet natural hair feel softer and by giving dried natural hair greater lightness, softness, suppleness, smoothness, sheen and manageability.
A subject of the invention is thus compositions for washing keratin materials, essentially characterized in that they comprise, in a cosmetically acceptable medium:
i) at least one detergent surfactant;
ii) at least one cationic galactomannan gum; and
iii) at least one acrylic terpolymer consisting of:
from 5% to 80% by weight, preferably from 15% to 70% by weight and more preferably from 40% to 70% by weight, of an acrylate monomer (a) chosen from a C
1
-C
6
alkyl acrylate and a C
1
-C
6
alkyl methacrylate;
from 5% to 80% by weight, preferably from 10% to 70% by weight and more preferably from 20% to 60% by weight, of a monomer (b) chosen from a heterocyclic vinyl compound containing at least one nitrogen or sulphur atom, a (meth)acrylamide, a mono- or di(C
1
-C
4
)alkylamino(C
1
-C
4
)alkyl (meth)acrylate and a mono- or di(C
1
-C
4
) alkylamino (C
1
-C
4
) alkyl (meth) acrylamide;
from 0.1% to 30% by weight, preferably from 0.1% to 10% by weight, of a monomer (c) chosen from:
a urethane produced by reaction between a monoethylenic unsaturated isocyanate and a nonionic surfactant encompassing a block copolymer of 1,2-butylene oxide and of ethylene oxide containing a C
1
-C
4
alkoxy end;
a copolymerizable ethylenic unsaturated surfactant monomer obtained by condensing a nonionic surfactant with an &agr;,&bgr;-ethylenic unsaturated carboxylic acid or its anhydride;
a surfactant monomer chosen from reaction products such as urea of a monoethylenic unsaturated mono- isocyanate with a nonionic surfactant containing an amine function;
a (meth)allyl ether of formula CH
2
═CR
1
CH
2
OA
m
B
n
A
p
R
2
in which R
1
denotes a hydrogen atom or a methyl group, A denotes a propylenoxy or butylenoxy group, B denotes ethylenoxy, n is equal to zero or denotes an integer less than or equal to 200 and preferably less than or equal to 100, m and p denote zero or an integer less than n and R
2
is a hydrophobic group of at least 8 carbon atoms and preferably of 8 to 30 carbon atoms; and
a nonionic monomer such as urethane produced by reaction of a monohydric nonionic surfactant with a monoethylenic unsaturated isocyanate; the weight percentages of monomers being based on the total weight of the monomers constituting the terpolymer.
In the washing composition according to the invention, the acrylic terpolymer is present in a proportion of from 0.01% to 20% by weight of active material (A.M.), preferably 0.1% to 10% by weight, relative to the total weight of the composition.
Preferred acrylate monomers (a) in particular comprise C
2
-C
6
alkyl acrylates. Ethyl acrylate is most particularly preferred.
Examples of preferred monomers (b) which may be mentioned are N,N-dimethylaminoethyl methacrylate (DMAEMA), N,N-diethylaminoethyl acrylate, N,N-diethyl-aminoethyl methacrylate, N-t-butylaminoethyl acrylate, N-t-butylaminoethyl methacrylate, N,N-dimethylamino-propylacrylamide, N,N-dimethylaminopropylmethacrylamide, N,N-diethylaminopropylacrylamide and N,N-diethylamino-propylmethacrylamide. N,N-Dimethylaminoethyl methacrylate is most particularly preferred.
The preferred monomers (c) are the copolymerizable ethylenic unsaturated surfactant monomers obtained by condensing a nonionic surfactant with an &agr;,&bgr;-ethylenic unsaturated carboxylic acid or its anhydride, preferably C
3
-C
4
mono- or dicarboxylic acids or their anhydrides and more particularly acrylic acid, methacrylic acid, crotonic acid, maleic acid, maleic anhydride and most particularly itaconic acid and itaconic anhydride.
The monomers (c) that are particularly preferred correspond to the copolymerizable ethylenic unsaturated surfactant monomers obtained by condensing a nonionic surfactant with itaconic acid. Among the nonionic surfactants which may be mentioned in particular are C
10
-C
30
fatty alcohols alkoxylated with 2 to 100 mol and preferably from 5 to 50 mol of an alkylene oxide, such as, for example, polyethylene glycol ethers of C
10
-C
30
fatty alcohols and more particularly the polyethylene glycol ethers of cetyl alcohol which are known as Ceteth in the CTFA dictionary, 7th edition, 1997.
Conventional methods for preparing these acrylic terpolymers are known to those skilled in the art. Such methods include solution polymerization, precipitation polymerization and emulsion polymerization, for example. Terpolymers in accordance with the invention and methods for preparing them are described in particular in patent applications EP-A-0 824 914 and EP-A-0 825 200.
Among these terpolymers, it is preferred in particular to use the <<Structure® Plus>> polymer sold by the company National Starch, which consists of acrylates, amino(meth)acrylates and C
10
-C
30
alkyl itaconate, polyoxyethylenated with 20 mol of ethylene oxide polyoxyethylenated with 20 mol of ethylene oxide, in the form of an aqueous dispersion containing 20% A.M.
In addition to these monomers, the terpolymer can contain other monomers which allow the said terpolymer to be crosslinked. These monomers are used in relatively low proportions, of up to 2% by weight relative to the total weight of the monomers used to prepare the terpolymer. Such crosslinking monomers comprise aromatic monomers bearing several vinyl substituents, alicyclic monomers bearing several vinyl substituents, bifunctional esters of phthalic acid, bifunctional esters of methacrylic acid, multifunctional esters of acrylic acid, N-methylenebis-acrylamide and aliphatic monomers bearing several vinyl substituents such as dienes, trienes and tetraenes. Crosslinking monomers may be, in particular, divinylbenzenes, trivinylbenzenes, 1,2,4-trivinylcyclohexene, 1,5-hexadiene, 1,5,9-decatriene, 1,9-decadiene, 1,5-heptadiene, diallyl phthalates, ethylene glycol dimethacrylates, polyethylene glycol dimethacrylates, penta- and tetraacrylates, triallyl pentaerythritols, octaallyl sucroses, cycloparaffins, cycloolefins and N-methylenebisacrylamide.
The compositions in accordance with the invention also necessarily comprise a cationic galactomannan gum. The galactomannan gum is preferably a cationic guar gum.
The cationic galactomannan gums preferably have a cationic charge density of less than or equal to 1.5 meq/g and more particularly between 0.1 and 1 meq/g.
In general, for the purposes of the present invention, the expression <<cationic galactomannan gum>> means any galactomannan gum containing cationic groups and/or groups
Beauquey Bernard
Maurin Veronique
Boyer Charles
Jacobson & Holman PLLC
L'Oreal
LandOfFree
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