organosilicones polymers carrying groups sulfolanyloxyalkyle, and their use for the production of a foam of polyurethane

摘要

A particular class of sulfolanyloxyalkyl-substituted organosilicone polymers are provided which comprise chemically combined monofunctional siloxy units (M.sub.o) and difunctional siloxy units (D. sub.o) and, for every two moles of M.sub.o, an average of from about two to about 100 silicon-bonded sulfolanyloxyalkyl groups (Q) and an average of from about 2 to about 30 silicon-bonded E groups where E is hydrogen or a polyoxyalkylene block (E). When E is hydrogen, the polymers are sulfolanyloxyalkyl-substituted polyalkylsiloxane hydrides and, when E. degree. is E, the polymers are sulfolanyloxyalkyl- substituted polyalkylsiloxane-polyoxyalkylene copolymers. The monofunctional siloxy units encompassed by M.sub.o have at least two alkyls bonded to the respective silicon atoms thereof and the difunctional siloxy units encompassed by D. sub.o have at least one alkyl bonded to the respective silicon atoms thereof, the remaining group bonded to silicon of said M. sub.o and D.sub.o units being alkyl, Q or E. The sulfolanyloxyalkyl-modified polyalkylsiloxane hydrides are especially useful as hydrosilation and condensation agents such as in forming the correspondingly modified polyalkylsiloxane-polyoxyalkylene copolymers of the invention. The copolymers in turn find particular application in the manufacture of cellular urethane products including urethane foam containing a flame-retardant.