NOVEL OIL-IN-WATER EMULSIONS ENRICHED WITH SALT WHICH ARE HIGHLY VISCOUS AND STABLE OVER TIME

摘要

Disclosed is a composition in the form of an oil-in-water emulsion, including: 5-55 wt % of an oil phase; 0.025-3.75 wt % of at least one cross-linked anionic polyelectrolyte resulting from the polymerization of partially or completely salified 2-methyl 2-[(1-oxo 2-propenyl)amino]1-propanesulfonic acid, with at least one neutral monomer selected from acrylamide, (2-hydroxy ethyl)acrylate, and N,N-dialkyl arylamides. Each alkyl group includes 1-4 carbon atoms, and at least one monomer, where R is an alkyl radical including 8-20 carbon atoms and n is a number no smaller than one and no larger than twenty, in the presence of a cross-linking agent; 0.025-3.75 wt % of a galactomannan having a degree of substitution of approximately 1/3; 37.5-94.95 wt % of a cosmetically acceptable aqueous phase, the aqueous phase including 1-25 wt % of a salt, the weight ratio between the galactomannan and the cross-linked anionic polyelectrolyte being 1:3 to 3:1.

主权项

1. Composition (C1) presented in the form of an oil-in-water type emulsion, comprising for 100% of the weight thereof:
from 5 to 55% by weight of an oil phase (P1) consisting of at least one oil and optionally at least one wax, from 0.025% to 3.75% by weight of at least one cross-linked anionic polyelectrolyte (PA) resulting from the polymerisation of partially or completely salified 2-methyl 2-[(1-oxo 2-propenyl)amino]1-propane sulfonic acid, with at least one neutral monomer chosen from acrylamide, (2-hydroxy ethyl) acrylate, the N,N-dialkyl acrylamides, wherein each of the alkyl groups comprises between one and four carbon atoms and at least one monomer of formula (I): wherein R represents a linear or branched alkyl radical comprising from eight to twenty carbon atoms and n represents a number greater than or equal to one and less than or equal to twenty, in the presence of at least one cross-linking agent, from 0.025% to 3.75% by weight of at least one galactomannan (GM) having a degree of substitution (DS) of approximately 1/3, from 37.5% to 94.95% by weight of a cosmetically acceptable aqueous phase (P2), said aqueous phase (P2) comprising for 100% of the weight thereof from 1% to 25% by weight of at least one salt (S) presented in a dissolved form Wherein for said composition (C1), the ratio y weight between the galactomannan (GM) and the cross-linked anionic polyelectrolyte (PA) is greater than or equal to 1/3 and less than or equal to 3/1.