| 摘要 |
A particular class of tertiary alcohol substituted organosilicone polymers are provided which comprise chemically combined monofunctional siloxy units (Mo) and difunctional siloxy units (Do) and, for every two moles of Mo, an average of from about two to about 100 silicon-bonded tertiary alcohol groups (Q) and an average of from about 2 to about 30 silicon-bonded E DEG groups where E DEG is hydrogen or a polyoxyalkylene block (E). When E DEG is hydrogen, the polymers are tertiary alcohol-substituted polyalkylsiloxane hydrides and, when E DEG is E, the polymers are tertiary alcohol-substituted polyalkylsiloxane-polyoxyalkylene copolymers. The monofunctional siloxy units encompassed by Mo have at least two alkyls bonded to the respective silicon atoms thereof and the difunctional siloxy units encompassed by Do have at least one alkyl bonded to the respective silicon atoms thereof, the remaining group bonded to silicon of said Mo and Do units being alkyl, Q or E DEG . The tertiary alcohol-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.
|
