A class of silicone surfactants suitable for use in the present invention are those represented by the following formula described in Zaske et al., Journal of Cellular Plastics, Nov-Dec, pg. 38-45 (1981): ##STR1## wherein R1 and R2 are a lower alkyl group, for example, containing 1 to 8 carbon atoms, M is a divalent linking group, such as alkylene (CH2)q where q is 0 to 10, POA is (Cn H2n O)m R1 c