Polymeric agent for obtaining a stable aqueous composition comprising particles in suspension

Patent metadata

Field	Value
Publication number	US-9339447-B2
Application number	US-201314133724-A
Country	US
Kind code	B2
Filing date	Dec 19, 2013
Priority date	Dec 20, 2012
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

Agent for obtaining a stable aqueous composition comprising a polymer constituted of:
at least one A monomer of acrylic acid and/or methacrylic acid and/or any of their salts, at least one B monomer of alkyl acrylate and/or methacrylate, and at least one C monomer corresponding to the following formula (I):

T-[(EO) n (PO) n′ (BO) n″ ]-Z   (I)
 in which:
T represents one end enabling the co-polymerization of the C monomer, [(EO) n (PO) n′ (BO) n″ ] represents a polyalkoxylated chain constituted of alkoxylated units, distributed into blocks, alternatively or statistically, chosen from among EO ethoxylated units, PO propoxylated units and BO butoxylated units, representing, independently from each other, 0 or a whole number between 1 and 150, the sum of n, -n′ and n″ not being null, and Z represents a fatty chain, linear or branched, of at least 16 carbon atoms,
at least one crosslinked monomer D.

First claim

The invention claimed is:

1. An aqueous composition, comprising a polymer comprising, based on the total weight of the polymer, in polymerized form:
from 10 to 50 wt. % of monomer(s) A, which is methacrylic acid or a salt thereof,
from 50 to 65 wt. % of monomer B, which is an ethyl acrylate, and
from 0.05 to 12 wt. % of monomer(s) C selected from monomers of formula (I):
T-[(EO) n (PO) n′ (BO) n″ ]-Z  (I)

 in which:
T is a methacrylate,
[(EO) n (PO) n′ (BO) n″ ] is a polyalkoxylated chain of ethoxylated units EO, propoxylated units PO and butoxylated units BO, with n ranging from 15 to 30, n′ and n″ each representing 0, and
Z represents a branched fatty chain of at least 16 carbon atoms, and

from 0.05 to 1.5 wt. % cross linking monomer D having three ethylenic unsaturations.

2. The composition according to claim 1 , wherein said composition has a pH less than or equal to 7.

3. The composition according to claim 1 , wherein said composition has a pH less than or equal to 5.5.

4. The composition according to claim 1 , wherein Z represents a branched fatty chain of 16 to 32 carbon atoms.

5. The composition according to claim 1 , comprising from 0. 1 to 20 wt. % of said polymer based on the total weight of the composition.

6. The composition according to claim 1 , wherein said composition is a cosmetic composition.

7. A method for preparing the stable aqueous composition of claim 1 , said method comprising combining water, particles, and said polymer.

8. The method according to claim 7 , wherein Z represents a branched fatty chain of 16 to 32 carbon atoms.

9. A cosmetic composition, comprising water, a continuous phase, particles in suspension in the continuous phase, and a polymer comprising, based on the total weight of the polymer, in polymerized form:
from 10 to 50 wt. % of monomer(s) A, which is methacrylic acid or a salt thereof,
from 50 to 65 wt. % of monomer B, which is an ethyl acrylate, and
from 0.05 to 12 wt. % of monomer(s) C selected from monomers of formula (I):
T-[(EO) n (PO) n′ (BO) n″ ]-Z  (I)

 in which:
T is a methacrylate,
[(EO) n (PO) n′ (BO) n″ ] is a polyalkoxylated chain of ethoxylated units EO, propoxylated units PO and butoxylated units BO, with n ranging from 15 to 30, n′ and n″ each representing 0, and
Z represents a branched fatty chain of at least 16 carbon atoms, and

from 0.05 to 1.5 wt. % cross linking monomer D having three ethylenic unsaturations.

Assignees

• Coatex Sas

Inventors

• Souzy Renaud
• Kensicher Yves
• Guerret Olivier

Classifications

• A61K2800/48

  Thickener, Thickening system · CPC title

• A61Q19/10

  Washing or bathing preparations · CPC title

• A61K8/044 Primary

  Suspensions · CPC title

• A61Q5/02

  Preparations for cleaning the hair · CPC title

• A61K8/86

  Polyethers · CPC title