siloxanyl - phosphate mixture and their use for the stabilisation metal - silanolates in siloxanes polymers

摘要

Siloxanyl-phosphate mixtures are prepared by reacting cyclopolydimethylsiloxane and a silylphosphate mixture. The siloxanyl- phosphate mixture is a mixture of 5 to 30 weight percent of a monosiloxanyl-phosphate of the formula ##STR1## 70 to 85 weight percent of a disiloxanyl-phosphate of the formula ##STR2## 2 to 11 weight percent of a trisiloxanyl-phosphate of the formula wherein x has an average value of from 3 to 30.PPThese siloxanyl-phosphate mixtures are useful in stabilizing basic polymerization catalyst such as potassium hydroxide or potassium silanolate and can either be used effectively per se or in combination with carbon dioxide.