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US 6,476,124 B1Granted
Composition comprising polymers having a star structure, the polymers, and their use
AssigneeL'oreal
InventorNathalie Mougin
Life of this patent
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Abstract
A composition, comprising, in a physiologically acceptable medium, at least one polymer with a highly specific ordered structure is disclosed. These compositions find a specific application in the field of caring for or making up keratinous fibres, in particular as a mascara composition for the eyelashes or for the hair.
Claims67
A polymer having a star structure chosen from structures of formula (I):
- A—[(M1)p1—(M2)p2. . . (Mi)pj]n (I)
- in which:
- A is chosen from polyfunctional centers having a functionality n;
- [(M1)p1—(M2)p2 . . . (Mi)pj] represents a branch comprising at least one polymerized monomeric unit Mi having a polymerization index pj;
- n is an integer greater than or equal to 2;
- i is greater than or equal to 1;
- pj is greater than or equal to 2;
- the at least two branches may be identical or different;
- and
- said at least two branches are grafted covalently to A;
- wherein said at least one polymerized monomeric unit Mi comprised by at least one of said at least two branches is chosen from polymerized monomeric units Mk, which may be identical or different, wherein a homopolymer formed by the corresponding polymerized monomeric units Mk has a Tg of greater than or equal to 10° C.;
- and
- wherein said at least one polymerized monomeric unit Mi chosen from polymerized monomeric units Mk is present in an amount greater than or equal to 45 percent by weight relative to the total weight of the polymerized monomeric units Mi;
- and
- wherein said polymer forms a film having a retraction of the isolated stratum corneum which is greater than or equal to 1 percent when measured using a dermometer, at 30° C., under a relative humidity of 40 percent, for a concentration of 7 percent of said polymer in a solvent.
12 more elements
A composition, comprising, in a physiologically acceptable medium, at least one polymer having a star structure chosen from structures of formula (I):
- A—[(M1)p1—(M2)p2. . . (Mi)pj]n (I)
- in which:
- A is chosen from polyfunctional centers having a functionality n;
- [(M1)p1—(M2)p2 . . . (Mi)pj] represents a branch comprising at least one polymerized monomeric unit Mi having a polymerization index pj;
- n is an integer greater than or equal to 2;
- i is greater than or equal to 1;
- pj is greater than or equal to 2;
- the at least two branches may be identical or different;
- and
- said at least two branches are grafted covalently to A;
- and
- wherein said at least one polymerized monomeric unit Mi comprised by at least one of said at least two branches is chosen from polymerized monomeric units Mk, which may be identical or different, wherein a homopolymer formed by the corresponding polymerized monomeric units Mk has a Tg of greater than or equal to 10° C.;
- and
- wherein said polymer forms a film having a retraction of the isolated stratum corneum which is greater than or equal to 1 percent when measured using a dermometer, at 30° C., under a relative humidity of 40 percent, for a concentration of 7 percent of said polymer in a solvent.
11 more elements
A process for treating a keratinous fibers, comprising applying to said keratinous fibers a composition, comprising, in an acceptable medium, at least one polymer having a star structure chosen from structures of formula (I):
- A—[(M1)p1—(M2)p2. . . (Mi)pj]n (I)
- in which:
- A is chosen from polyfunctional centers having a functionality n;
- [(M1)p1—(M2)p2 . . . (Mi)pj] represents a branch comprising at least one polymerized monomeric unit Mi having a polymerization index pj;
- n is an integer greater than or equal to 2;
- i is greater than or equal to 1;
- pj is greater than or equal to 2;
- the at least two branches may be identical or different;
- and
- said at least two branches are grafted covalently to A;
- and
- wherein said at least one polymerized monomeric unit Mi comprised by at least one of said at least two branches is chosen from polymerized monomeric units Mk, which may be identical or different, wherein a homopolymer formed by the corresponding polymerized monomeric units Mk has a Tg of greater than or equal to 10° C.;
- and
- wherein said polymer forms a film having a retraction of the isolated stratum corneum which is greater than or equal to 1 percent when measured using a dermometer, at 30° C., under a relative humidity of 40 percent, for a concentration of percent of said polymer in a solvent.
11 more elements
A process for preparing a cosmetic composition, comprising introducing, in a cosmetically acceptable medium, at least one polymer in an amount effective for curling keratinous fibers, wherein said at least one polymer having a star structure chosen from structures of formula (I):
- A—[(M1)p1—(M2)p2. . . (Mi)pj]n (I)
- in which:
- A is chosen from polyfunctional centers having a functionality n;
- [(M1)p1—(M2)p2 . . . (Mi)pj] represents a branch comprising at least one polymerized monomeric unit Mi having a polymerization index pj;
- n is an integer greater than or equal to 2;
- i is greater than or equal to 1;
- pj is greater than or equal to 2;
- the at least two branches may be identical or different;
- and
- said at least two branches are grafted covalently to A;
- and
- wherein said at least one polymerized monomeric unit Mi comprised by at least one of said at least two branches is chosen from polymerized monomeric units Mk, which may be identical or different, wherein a homopolymer formed by the corresponding polymerized monomeric units Mk has a Tg of greater than or equal to 10° C.;
- and
- wherein said polymer forms a film having a retraction of the isolated stratum corneum which is greater than or equal to 1 percent when measured using a dermometer, at 30° C., under a relative humidity of 40 percent, for a concentration of 7 percent of said polymer in a solvent.
11 more elements
Dependencies are inferred from the claim text.