PROCESS FOR THE PREPARATION OF HEAT-SETTING SILICONE RESINS, PARTICULARLY APPLICABLE AS ELECTRICALLY INSULATING RESINS

摘要

The invention relates to a process for the preparation of heat-curable resins, usable especially as electrically insulating resins, by the reaction of alkoxy siloxanes of the formula in which OR1 represents an alkoxy group of primary or secondary aliphatic alcohols with 1 to 4 carbon atoms, R2 represents an alkyl or a phenyl group, a has a value of 1.0 to 1.5, b has a value of 0.1 to 1.0; with a mixture of low molecular weight, multihydric alcohols consisting of (a) 25 to 95 mole percent of neopentylglycol hydroxypivalate, and (b) 75 to 5 mole percent of a low molecular weight, at least trihydric alcohol at temperatures of 80 DEG to 200 DEG C. The resins thus prepared can be utilized advantageously for the insulation of generators, transformers and the like. They possess high elasticity and excellent adhesion.