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
2003-05-13
Delcotto, Gregory (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S123000, C510S125000, C510S127000, C510S130000, C510S158000, C510S159000, C510S499000, C510S505000, C510S475000
Reexamination Certificate
active
06562772
ABSTRACT:
The present invention relates in general to compositions for washing keratin materials, based on a detergent surfactant, a nacreous and/or opacifying agent and an acrylic terpolymer, as well as to a washing process using these compositions.
Nacreous and/or opacifying agents are commonly used in shampoos in order to give these shampoos a nacreous appearance, which is preferred by consumers. It has been found that, due to the low density of these nacreous agents, they often have the drawback of rising to the surface of the shampoo and forming a layer thereat, which consumers find aesthetically unpleasant. Polymers, in particular crosslinked acrylic acid such as Carbopols, are frequently used to avoid the appearance of this phenomenon; however, they have the drawback of reducing the cosmetic performance qualities of shampoos, in particular by making keratin fibres coarser and more charged.
There is thus a need for a detergent cosmetic composition, in particular a shampoo, which has a nacreous and/or opacified appearance while at the same time giving acceptable cosmetic performance qualities on keratin materials, i.e. in particular the hair and the scalp; and more particularly as regards the lightness, softness and feel of the hair.
The Applicant has discovered, surprisingly, that it is possible to formulate compositions for washing keratin materials, in particular shampoos with a nacreous and/or opacified appearance while at the same time having the desired aesthetic and cosmetic properties, by using in these compositions a detergent surfactant and a nacreous and/or opacifying agent combined with a specific acrylic terpolymer, defined below. Specifically, it has been found that the use of the said acrylic terpolymer gives keratin materials, and in particular the hair, satisfactory cosmetic properties, particularly by making them lighter and by making wet hair feel soft and by giving dried hair greater softness, smoothness, suppleness, manageability and sheen.
It has also been found that the compositions according to the invention have good solubility and good skin tolerance.
A subject of the invention is thus compositions for washing keratin materials, essentially characterized in that they comprise, in a cosmetically acceptable medium:
1) at least one anionic, amphoteric or nonionic detergent surfactant;
2) at least 1.5% by weight, relative to the total weight of the composition, of at least one nacreous and/or opacifying agent chosen from:
i) esters of polyols containing more than two carbon atoms and of long-chain fatty acids;
ii) long-chain fatty acid alkanolamides;
iii) esters of long-chain monoalcohols and of long-chain fatty acids;
iv) long-chain fatty alkyl ethers;
v) long-chain esters of long-chain alkanolamides;
vi) single-chain fatty alcohols containing more than 20 carbon atoms;
vii) long-chain amine oxides;
viii) N,N-dihydrocarbyl(C
10
-C
30
, preferably C
12
-C
22
) amidobenzoic acid and their salts;
ix) alcohols containing from 27 to 48 carbon atoms and comprising one or two ether and/or thioether or sulphoxide groups; and
x) titanium oxides and micas;
3) and 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
1-4
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 monoisocyanate 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 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 C
8
-C
30
; 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-diethylaminoethyl methacrylate, N-t-butylaminoethyl acrylate, N-t-butylaminoethyl methacrylate, N,N-dimethylaminopropylacrylamide, N,N-dimethylaminopropylmethacrylamide, N,N-diethylaminopropylacrylamide and N,N-diethylaminopropylmethacrylamide. N,N-Dimethylaminoethyl methacrylate is most particularly preferred.
The preferred monomers (c) are the copolymerizable ethylenic unsaturated surfactant monomers obtained by condensing a nonionic surf actant 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, 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 phth
Beauquey Bernard
Maurin Veronique
Delcotto Gregory
Jacobson & Holman PLLC
L'Oreal
LandOfFree
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