| abstract |
Described is the preparation of water-in-oil emulsions of preferably polar oils by adding as emulsifiers or stabilizers 0.1 to 10 % by wt., relative to the oil phase, of block copolyesters of the general formula (I) R?1CO-(OR2CO)¿y-(OC2H4O)x-O-(COR2O)z-COR1, in which R1CO is an acyl group with 1-22 C-atoms or a hydroxyacyl group derived from a fatty acid with 16-22 C-atoms or a hydroxyacyl group (OR2CO) derived from a fatty acid with 16-22 C-atoms, x is a number from 5 to 150 and y and z are numbers from 2 to 75, the group (OC¿2?H4)x making up 10 to 20 % by wt. of the total molecular weight. |