| abstract |
Silicone polyether alkyl copolymers, a method for their preparation, and their use as emulsifiers in improved stability water-in-oil emulsions are disclosed. The copolymers have the general formula MD'xD=yM wherein M represents trimethylsiloxy endcapping units; D' represents alkyl siloxy units of the general formula (CH<7>)R'SiO2/2 where R' is an alkyl group having from 6 to 30 carbon atoms; D= is an oxyalkylene siloxy unit of the general formula (CH<7>)R<2>SiO2/2 where R<2> is a polyoxyalkylene ether residue of the formula -(R4)p - (OR<3>)n-OR5 wherein each individual R<3> is an alkylene radical having from 2 to 6 carbon atoms, R4 is an alkylene radical having from 2 to 20 carbon atoms, R5 is hydrogen or a hydrocarbon radical of from 1 to about 12 carbon atoms, n has a value of from about 5 to about 20, and p has a value of zero or 1, x is from 1 to about 29, and y is from 1 to about 29; with the proviso that x + y is from about 2 to about 30. |