Thickening self-invertible inverse latex comprising, as an inverting agent, surfactant species of the polyglycerol ester family, and compositions containing same

Abstract

Disclosed is a self-invertible inverse latex including, as an inverting agent, surfactant species of the polyglycerol ester family; the use thereof as a thickening and/or emulsifying and/or stabilising agent for a cosmetic, dermopharmaceutical or pharmaceutical topical composition, and cosmetic, dermopharmaceutical or pharmaceutical topical compositions containing same. Also disclosed is a new surfactant composition containing polyglycerol esters.

1 . A self-invertible inverse latex of a crosslinked anionic polyelectrolyte (P) comprising, per 100 mol %:
 (a 1 )—of a proportion of greater than or equal to 30 mol % and less than 100 mol % of monomer units resulting from 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid in free acid or partially or totally salified form; and   (a 2 )—of a proportion of greater than 0 mol % and less than or equal to 1 mol % of monomer units resulting from at least one diethylenic or polyethylenic crosslinking monomer (AR);   the sum of said molar proportions of monomer units according to a 1 ) and a 2 ) being equal to 100 mol %;   
       said self-invertible inverse latex being an emulsion of water-in-oil (W) comprising, per 100% of its weight:
 a) —from 10% by weight to 90% by weight of said crosslinked anionic polyelectrolyte (P); 
 b) —from 5% by weight to 50% by weight of a fatty phase constituted of at least one oil (O); 
 c) —from 1% by weight to 50% by weight of water; 
 d) —from 0.5% by weight to 10% by weight of an emulsifying system of water-in-oil (S 1 ); and 
 e) —from 2% by weight to 10% by weight of an emulsifying system of oil-in-water (S 2 ); 
 the sum of the proportions by weight of a), b), c), d) and e) being equal to 100% by weight; 
 
       wherein said emulsifying system of oil-in-water (Sz) comprises, per 100% of its weight:
 f) —a proportion of greater than or equal to 50% by weight and less than or equal to 100% of a composition (C e ) which comprises, per 100% of its weight: 
 e 1 )—from 10% by weight to 60% by weight of at least one compound of formula (I):
   HO—[CH 2 —CH(OH)—CH 2 —O] n —H  (I)
 
 
 
       in which n represents an integer greater than or equal to 1 and less than or equal to 15; and
 e 2 )—from 40% by weight to 90% by weight of at least one compound of formula (II):
   R 1 —(C═O)[O—CH 2 —CH(OH)—CH 2 ] p —OH  (II),
 
 
 
       in which p, which is different from or identical to n, represents an integer greater than or equal to 1 and less than or equal to 15; and in which the R 1 —(C═O)— group represents a saturated or unsaturated and linear or branched aliphatic radical comprising from 6 to 22 carbon atoms;
 the sum of the proportions by weight of e 1 ) and e 2 ) being equal to 100% by weight. 
 
     
     
         2 . The self-invertible inverse latex as defined in  claim 1 , wherein said crosslinked anionic polyelectrolyte (P) is a copolymer of 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid and of acrylic acid which are partially or completely salified in the sodium salt or ammonium salt form, crosslinked by triallylamine and/or methylenebis(acrylamide); a copolymer of 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid (γ) partially or completely salified in the sodium salt form and of acrylic acid (δ) partially or completely salified in the sodium salt form in a molar ratio (γ)/(δ) of greater than or equal to 30/70 and less than or equal to 90/10, crosslinked by triallyl amine and/or methylenebis(acrylamide); or a copolymer of 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid (γ) partially or completely salified in the sodium salt form and of acrylic acid (δ) partially or completely salified in the sodium salt form in a molar ratio (γ)/(δ) of greater than or equal to 40/60 and less than or equal to 90/10, crosslinked by triallylamine and/or methylenebis(acrylamide). 
     
     
         3 . The self-invertible inverse latex as defined in  claim 1 , wherein, in the formula (I) as defined above, n represents an integer greater than or equal to 1 and less than or equal to 10, and wherein, in the formula (II) as defined above, p, which is identical to or different from n, represents an integer greater than or equal to 1 and less than or equal to 10, and the R 1 —(C═O)— group is chosen from octanoyl, decanoyl, ω-undecylenoyl, dodecanoyl, tetradecanoyl, hexadecanoyl, octadecanoyl, 9-octadecenoyl or 9,12-octadecadienoyl radicals. 
     
     
         4 . The self-invertible inverse latex as defined in  claim 2 , wherein, in the formula (I) as defined above, n represents an integer greater than or equal to 1 and less than or equal to 10, and wherein, in the formula (II) as defined above, p, which is identical to or different from n, represents an integer greater than or equal to 1 and less than or equal to 10, and the R1-(C═O)— group is chosen from octanoyl, decanoyl, ω-undecylenoyl, dodecanoyl, tetradecanoyl, hexadecanoyl, octadecanoyl, 9-octadecenoyl or 9,12-octadecadienoyl radicals. 
     
     
         5 . The self-invertible inverse latex as defined in  claim 1 , wherein in said emulsifying system of oil-in-water (S 2 ), said composition (C e ) as defined above consists of, per 100% of its weight:
 e 1 )—from 5% by weight to 15% by weight of at least one compound of formula (I) as defined above, and   e 2 )—from 60% by weight to 80% by weight of at least one compound of formula (II) as defined above.   
     
     
         6 . The inverse latex as defined in  claim 1 , wherein said emulsifying system of oil-in-water (S 2 ) is said composition (C e ) as defined above.