Drug – bio-affecting and body treating compositions – Live hair or scalp treating compositions – Polymer containing
Reexamination Certificate
2000-02-25
2003-07-08
Pryor, Alton N. (Department: 1616)
Drug, bio-affecting and body treating compositions
Live hair or scalp treating compositions
Polymer containing
Reexamination Certificate
active
06589519
ABSTRACT:
This Application is a 371 of PCT/FR98/01845 filed Aug. 24, 1998.
The present invention relates to novel cosmetic compositions comprising, in a cosmetically acceptable medium, at least one conditioner chosen from poly-&agr;-olefins, fluoro oils, fluoro waxes, fluoro gums, carboxylic acid esters having at least 10 carbon atoms, cationic polymers, silicones that are insoluble in the medium, mineral, plant or animal oils and at least one polyoxyalkylenated aminosilicone of (AB)
n
type, A being a polysiloxane block and B being a polyoxyalkylenated block containing at least one amine group.
It is well known that hair which has been sensitized (i.e. damaged and/or embrittled) to varying degrees under the action of atmospheric agents or under the action of mechanical or chemical treatments, such as dyes, bleaches and/or permanent-waving, is often difficult to disentangle and to style, and lacks softness.
It has already been recommended to use conditioners, in particular cationic polymers or silicones, in compositions for washing or caring for keratinous material such as the hair, in order to disentangle the hair and to give it softness and flexibility. However, the cosmetic advantages mentioned above are also unfortunately accompanied, on dried hair, by certain cosmetic effects considered as being undesirable, i.e. lankness of the hairstyle (lack of lightness of the hair), lack of smoothness (hair not uniform from the root to the tip) and insufficient sheen.
In addition, the use of cationic polymers for this purpose has various drawbacks. On account of their high affinity for the hair, some of these polymers become deposited thereon to a large extent during repeated use, and lead to adverse effects such as an unpleasant, laden feel, stiffening of the hair and interfibre adhesion which has an effect on styling. These drawbacks are accentuated in the case of fine hair, which lacks liveliness and body.
In order to improve the conditioning properties of hair products, it has also been recommended (FR-A-2,709,954 and FR-A-2,709,955) to use cosmetic compositions to treat hair containing a combination of a cationic or amphoteric polymer and a nonionic polyoxyalkylenated silicone of (AB)n type, A being a polysiloxane block and B being a polyoxyalkylenated block. However, these compositions are still not entirely satisfactory as regards the smoothness and softness properties imparted to the hair. Furthermore, the hair is made lank after repeated applications.
In summary, it turns out that the current cosmetic compositions containing conditioners are not entirely satisfactory.
The Applicant has now discovered that he combination of a specific aminosilicone with certain conditioners allows these drawbacks to be overcome on account of a synergistic effect.
Thus, after considerable research conducted in this matter, the Applicant has now found that by introducing a polyoxyalkylenated aminosilicone of (AB)n type, A being a polysiloxane block and B being a polyoxyalkylenated block containing at least one amine group, into the compositions, in particular the hair compositions, of the prior art based on conditioners, it is possible to limit, or even to eliminate altogether, the problems generally associated with the use of such compositions, i.e. in particular, the lankness and the lack of smoothness and softness of the hair, while at the same time retaining the other advantageous cosmetic properties which are associated with conditioner-based compositions.
This combination provides cosmetic properties that are considerably better than the properties obtained with one or other of the constituents used alone.
Moreover, when applied to the skin, in particular in the form of a bubble bath or a shower gel, the compositions of the invention provide an improvement in the softness of the skin.
Thus, according to the present invention, novel cosmetic compositions are now proposed comprising, in a cosmetically acceptable medium, at least one polyoxyalkylenated aminosilicone of (AB)n type, A being a polysiloxane block and B being a polyoxyalkylenated block containing at least one amine group and at least one conditioner chosen from poly-&agr;-olefins, fluoro oils, fluoro waxes, fluoro gums, carboxylic acid esters having at least 10 carbon atoms, cationic polymers, silicones that are insoluble in the medium, and mineral, plant or animal oils.
Another subject of the invention relates to a process for treating keratinous material such as the hair, characterized in that it consists in applying cosmetic compositions according to the invention to the said material.
The various subjects of the invention will now be described in detail. All of the meanings and definitions of the compounds used in the present invention given below are valid for all of the subjects of the invention.
The polyoxyalkylenated aminosilicones of (AB)n type, A being a polysiloxane block and B being a polyoxyalkylenated block containing at least one amine group, can consist of repeating units of the following general formula:
[SiMe
2
—O—(SiMe
2
O)
x
SiMe
2
—R—N(H)—R′—O—(C
2
H
4
O)
a
—(C
3
H
6
O)
b
—R′—N(H)—R—] (I)
in which:
a is an integer greater than or equal to 1, preferably between 5 and 200 and even more particularly between 5 and 100,
b is an integer between 0 and 200, preferably between 4 and 200 and even more particularly between 5 and 100,
R, which may be identical or different, represent a divalent organic group which is linked to the adjacent silicon atom via a carbon-silicon bond and to a nitrogen atom,
R′, which may be identical or different, represent a divalent organic group which is linked to the adjacent oxygen atom via a carbon-oxygen bond and to a nitrogen atom,
R is preferably a C
2
-C
12
hydrocarbon-based radical optionally containing one or more hetero atoms such as oxygen. More particularly, R denotes an ethylene, linear or branched propylene, linear or branched butylene or —CH
2
CH
2
CH
2
OCH(OH)CH
2
— radical,
R′ is a C
2
-C
12
hydrocarbon-based radical optionally containing one or more hetero atoms such as oxygen. More particularly, R′ denotes a divalent alkylene radical such as, for example, ethylene, linear or branched propylene or linear or branched butylene.
The siloxane blocks generally represent between 50 and 95 mol % relative to the total weight of the silicone, and more particularly between 70 and 85 mol %.
The amine content is generally between 0.02 and 0.5 meq/g of copolymer in a solution at 30% in dipropylene glycol, and more particularly between 0.05 and 0.2.
The weight-average molecular weight of the silicone is preferably between 5000 and 1,000,000 and even more particularly between 10,000 and 200,000.
The block copolymers used in the context of the present invention are prepared by processes known to those skilled in the art, for example by reaction of &agr;,&ohgr;-diepoxy- or -dichloro-silicone with an &agr;,&ohgr;-diamino polyoxyalkylene.
The polyoxyalkylenated aminosilicone is preferably used in an amount of between 0.01 and 20% by weight relative to the total weight of the composition. More preferably, this amount is between 0.1 and 15% by weight and even more particularly between 0.5 and 10% by weight.
The conditioners can be in liquid, semi-solid or solid form such as, for example, oils, waxes or gums.
According to the invention, the conditioners must be chosen from poly-&agr;-olefins, fluoro oils, fluoro waxes, fluoro gums and carboxylic acid esters having at least 10 carbon atoms, cationic polymers, silicones that are insoluble in the medium, and mineral, plant or animal oils, and the mixtures thereof. The preferred conditioners according to the invention are poly-&agr;-olefins, cationic polymers and silicones that are insoluble in the medium.
The poly-&agr;-olefins are, in particular:
of hydrogenated or non-hydrogenated polybutene type, and preferably hydrogenated or non-hydrogenated polyisobutene.
Isobutylene oligomers with a molecular weight of less than 1000 and mixtures thereof with polyisobutylenes with a molecular weight of greater tha
Cauwet-Martin Daniele
Restle Serge
Finnegan Henderson Farabow Garrett & Dunner LLP
L'Oreal (S.A.)
Pryor Alton N.
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