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 an appropriate medium, at least one polymer with a highly specific ordered structure is disclosed. These compositions find a specific application in the field of make-up and are capable of being applied to keratinous fibers, in particular to the nails, eyelashes, eyebrows and hair. In particular, these compositions can make it possible to obtain a film which exhibits good resistance to chipping, to impacts, to rubbing movements, to scratches and/or to pressing actions.
Claims71
A film-forming 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;
- pj is greater than or equal to 2;
- there are at least two branches, which 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 0° C.;
- wherein said at least one polymerized monomeric unit Mi contained by at least one of said at least two branches is chosen from polymerized monomeric units Mj, which may be identical or different, wherein a homopolymer formed by the corresponding polymerized monomeric units Mj has a Tg of less than or equal to 0° C.;
- wherein said at least one polymerized monomeric unit Mi chosen from polymerized monomeric units Mk is present in an amount ranging from 55 to 98 percent by weight relative to the total weight of the polymerized monomeric units Mi;
- and
- wherein said at least one polymerized monomeric unit Mi chosen from polymerized monomeric units Mj is present in an amount ranging from 2 to 45 percent by weight relative to the total weight of the polymerized monomeric units Mi,
- wherein said film-forming polymer forms a film having a hardness of less than 110.
A composition, comprising, in a physiologically acceptable medium, at least one film-forming 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;
- pj is greater than or equal to 2;
- there are at least two branches, which 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 0° C.;
- and
- wherein said at least one polymerized monomeric unit Mi contained by at least one of said at least two branches is chosen from polymerized monomeric units Mj, which may be identical or different, wherein a homopolymer formed by the corresponding polymerized monomeric units Mj has a Tg of less than or equal to 0° C.,
- wherein said at least one film-forming polymer forms a film having a hardness of less than 110.
A process for treating a keratinous substance, comprising applying to said keratinous substance a composition, comprising, in a physiologically acceptable medium, at least one film-forming 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;
- pj is greater than or equal to 2;
- there are at least two branches, which 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 0° C.;
- and
- wherein said at least one polymerized monomeric unit Mi contained by at least one of said at least two branches is chosen from polymerized monomeric units Mj, which may be identical or different, wherein a homopolymer formed by the corresponding polymerized monomeric units Mj has a Tg of less than or equal to 0° C.,
- wherein said at least one film-forming polymer forms a film having a hardness of less than 110.
A process for preparing a cosmetic or pharmaceutical composition which is able to form a film, comprising introducing, in a physiologically acceptable medium, at least one film-forming polymer in an amount effective increasing resistance to chipping, impact, rubbing movement, scratches, or pressing action of said film to said cosmetic or pharmaceutical composition, wherein said at least one film-forming 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;
- pj is greater than or equal to 2;
- there are at least two branches, which 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 0° C.;
- and
- wherein said at least one polymerized monomeric unit Mi contained by at least one of said at least two branches is chosen from polymerized monomeric unit Mj, which may be identical or different, wherein a homopolymer formed by the corresponding polymerized monomeric units Mj has a Tg of less than or equal to 0° C.,
- wherein said at least one film-forming polymer forms a film having a hardness of less than 110.
Dependencies are inferred from the claim text.