Siloxanyl-phosphate mixture and its use in stabilizing metal silanolates in siloxane 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 <CHEM> 70 to 85 weight percent of a disiloxanyl-phosphate of the formula <CHEM> and 2 to 11 weight percent of a trisiloxanyl-phosphate of the formula <CHEM> wherein x has an average value of from 3 to 30. These 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. <IMAGE>