Composition comprising polymers having a star structure, the polymers, and their use

• US 6,692,733 B1
• Filed: 04/05/2000
• Issued: 02/17/2004
• Est. Priority Date: 04/06/1999
• Status: Expired due to Fees

• Current Assignee: L'Oreal SA
• Original Assignee: L'Oreal SA
• Inventors: Mougin, Nathalie
• Primary Examiner(s): Padmanabhan, Sreeni
• Assistant Examiner(s): Wells, Lauren Q.
• Application Number:
  US09/544,394
• Time in Patent Office: 1,413 Days
• Field of Search: 424/401, 424/78.03, 424/78.18, 424/70.11, 526/72, 526/73, 526/319, 514/880, 525/64, 525/163, 525/222, 525/299, 525/314
• US Class Current: 424/78.18
• CPC Class Codes: A61K 2800/54 Polymers characterized by specific structures/properties
• CPC Class Codes: A61K 8/8152 Homopolymers or copolymers of esters, e.g. (meth)acrylic acid esters; Compositions of derivatives of such polymers
• CPC Class Codes: A61Q 19/00 Preparations for care of the skin
• CPC Class Codes: A61Q 19/08 Anti-ageing preparations
• CPC Class Codes: C08F 293/00 Macromolecular compounds obtained by polymerisation on to a macromolecule having groups capable of inducing the formation of new polymer chains bound exclusively at one or both ends of the starting macromolecule on to polymers modified by introduction of unsaturated end groups C08F290/02
• CPC Class Codes: C08F 293/005 using free radical "living" or "controlled" polymerisation, e.g. using a complexing agent

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 the skin, in particular of the face, and more especially for treating, that is to say decreasing, erasing and/or smoothing out, wrinkles and/or fine lines of the skin.

Claims

1. A process for treating a keratinous substance, comprising applying to said keratinous substance a composition, comprising, in a physiologically acceptable medium, at least one polymer having a star structure chosen from structures of formula (I):

2. A process according to claim 1, further comprising at least one polymerized monomeric unit Mi contained by at least one of said at least two branches 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 10°

C.; and

wherein said at least one polymerized monomeric unit Mi chosen from polymerized monomeric units Mj is present in an amount less than or equal to 55 percent by weight relative to the total weight of the polymerized monomeric units Mi.

3. A process according to claim 1, further comprising at least one film-forming agent.

4. A process according to claim 1, wherein said keratinous substance is chosen from skin from the face, neck, hands, and/or body.

5. A process according to claim 1, wherein said keratinous substance is chosen from human keratinous substances.

6. A process for cosmetic treatment of wrinkles or fine lines of skin, comprising applying to said wrinkles or fine lines at least one polymer in an amount effective for softening the wrinkle or fine line by producing a tightening effect, wherein said at least one polymer having a star structure chosen from structures of formula (I):

7. A process according to claim 6, further comprising at least one polymerized monomeric unit Mi contained by at least one of said at least two branches 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 10°

C.; and

wherein said at least one polymerized monomeric unit Mi chosen from polymerized monomeric units Mj is present in an amount less than or equal to 55 percent by weight relative to the total weight of the polymerized monomeric units Mi.

8. A process according to claim 6, further comprising at least one film-forming agent.