SILOXANE-OXYALKYLENE COPOLYMER SURFACTANT COMPOSITIONS

Siloxane-oxyalkylene copolymer surfactants in combination with alkyl esters of fatty acids are disclosed. Alkyl esters of fatty acids are represented by the general formula Z-COO-Y where Z is a saturated or unsaturated C10-24 alkyl or alkylene group and Y is typically a C1-6 alkyl, alkylene linear or branched group. The siloxane- oxyalkylene copolymer surfactants that are typically used with the fatty esters have the general formula MDxD'yM wherein M represents (CH3)3SiO1/2 or R(CH3)2SiO1/2, D represents (CH3)2SiO2/2, D' represents (CH3)RSiO2/2, and the value of x+y is from 50 to 220, and theratio x/y is from 5 to 15 inclusive. In the above formulae for M and D', R is a polyether-containing substituent. The siloxane-oxyalkylene copolymer surfactants used in conjunction with the fatty ester contains a major fraction (60-80 wt.%) of siloxane- oxyalkylene with one pendant R typically defined as CnH2nO(C2H4O) a (C3H6O)bR' moieties having weight average molecular weights of from about 1400-2000 and wherein n is 1