Abstract: A long chain alkyl modified organosilicon polyether copolymer (PMGC) was prepared from side chain hydrogen containing silicone oil,1-decene and allyl polyether as main raw material by siloxane addition reaction.The structure of the product was characterized by IR and ¹H NMR.The effects of hydrogen content and viscosity of the hydrogen containing silicone oil as well as 1-decene and allyl polyether molar ratio on the emulsifying ability,oil compatibility and formula skin feeling of the product were studied.Research shows that when the hydrogen containing silicone oil contains 0.4% hydrogen,the viscosity is 100 mPa·s,and n(1-decene)∶n(allyl polyether)=3∶1,the emulsifying ability and the compatibility with oil are both best.If it is applied in the BB cream formula,that cream will have optimal moisture and smooth sense.

Key words: organosilicon surfactant, hydrosilylation, emulsifier, personal care