Patent ID: 7199185

Claim:
A process for the production of an oil-in-water emulsion having an oil discontinuous phase and an aqueous continuous phase, said process comprising: (i) reacting a polymeric stabiliser of formula (I) said stabiliser being a random graft copolymer or a block copolymer and including a plurality of vinylic monomers, not being exclusively of vinylic esters or of their hydrolysed products and being soluble or dispersible in the aqueous continuous phase wherein: G is a group * or “Hydrophile”; “Hydrophile” is the residue of a hydrophilic initiator group; R, R1, and R2 are independently H or methyl; X is a hydrophilic moiety; L is a moiety containing a cross-linking group capable of undergoing a cross-linking nucleophilic or condensation reaction at the interface of the discontinuous and continuous phases of said emulsion, wherein said cross-linking group is selected from —SH, —OH and —NHA where A is hydrogen or C 1 –C 4 alkyl; and —COOH or a salt thereof; Y is a hydrophobic moiety; e is from 0.005 to 0.33; f is from 0.05 to 0.4; and g is from 0.1 to 0.9; with (ii) one or more substances dissolved in the liquid discontinuous oil phase and which react with said cross-linking group.