Synthesis of organosilicon resin

Abstract

The synthesis of organosilicon resin includes the following steps: selecting at least one kind of alkyl trialkoxy silane RSi(OR1)3 with R / Si ration of 0.7-1.5 as the initial material, where R is one-valent alkyl radical, one-valent aryl radical, one-valent unsaturated group, etc; and R1 represents C1-C4 alkyl radical; adding water, weak polarity or non-polyarity solvent ad 0.1 N hydrochloric acid solution, refluxing under stirring at 60-100 deg.c of 1-6 hr, further stirring for 0.5 hr after stopping heating, re-heating to 65-130 deg.c, curing for 40-120 min, stopping reaction, and cooling to obtain colorless transparent homogeneous organosilicon resin solution. The process has no HCl produced, no corrosion to the apparatus and no environmental pollution, and can meet the special requirement of coating or soaking with organosilicon resin with little water content.

Description

technical field

[0001] The present invention relates to the preparation method of silicone resin, specifically, the present invention relates to a kind of synthesis method of the silicone resin solution that can be dissolved in weak polar or non-polar solvents such as toluene. Background technique

[0002] In some special applications, such as controlling the low dielectric loss of the product, it is necessary to carry out special moisture-proof coating treatment on the product interface. When using a silicone resin solution as a coating or composite impregnating solution, it is required that no moisture can be brought in. Therefore, a silicone resin solution in a polar solvent such as ethanol is not allowed. In the existing silicone resin synthesis methods, the silicone resin solutions synthesized from alkoxysilanes such as methyltriethoxysilane and phenyltriethoxysilane as raw materials all use ethanol as a solvent. Because the hydrolysis of alkoxysilane directly produces...