Method for preparing phenyl vinyl silicon resin by non-hydrolyzing method

Abstract

The invention discloses a method for preparing phenyl vinyl silicon resin by a non-hydrolyzing method. The method adopts the non-hydrolyzing method to conduct condensation polymerization on a certain amount of hydroxyl-terminated organosilane and vinyl-terminated organosilane in an environment without water and solvent under the catalysis of a metal hydroxide or a metal organic salt hydroxide to prepare the phenyl vinyl silicon resin. The specific steps are as follows: the hydroxyl-terminated organosilane, the vinyl-terminated organosilane and the metal hydroxide or the metal organic salt hydroxide are stirred and heated up to be at 75-85 DEG C under the nitrogen protection in a flask until the three are homogeneous and transparent, subjected to pressure reduction to dehydrate, are heated up to be at 90-95 DEG C for polymerization, continuously heated up be at 150 DEG C after being in a balanced reaction for 3 hours, and vacuumized to remove low-molecular substances to obtain the phenyl vinyl silicon resin. The preparation method is simple; the synthetic technique is clean and environmentally-friendly; poisonous three-waste byproducts are avoided. The preparation method is suitable for LED packaging materials.

Description

technical field [0001] The invention relates to a method for preparing phenylvinyl silicone resin by a non-hydrolysis method, which belongs to the research field of new organic silicon materials. Background technique [0002] The synthesis of traditional silicone resins is generally made from a mixture of various organosilanes through hydrolysis, polycondensation, neutralization and other reactions in a mixed solvent. A large amount of acid water and toxic volatile gases are produced during the reaction process. The synthesis process It is not conducive to the sustainable development of the organic silicon industry, and has also caused great harm to the environment. Silicone resins synthesized by traditional chlorosilane or alkoxysilane hydrolysis methods tend to generate linear, cyclic or crosslinked polysiloxanes with different degrees of polymerization during polycondensation due to the different degrees of hydrolysis of organosilicon monomers. The existence of the str...

AI Technical Summary

Problems solved by technology

[0002] The synthesis of traditional silicone resins is generally made from a mixture of various organosilanes, which are prepared through hydrolysis, polycondensation, neutralization and other reactions in a mixed solvent. The reaction process A large amount of acid water and toxic volatile gases are produced in the process. This synthesis process is not conducive to the sustainable development of the organic silicon industry and has caused great harm to the environment.

Silicone resins synthesized by traditional chlorosilane or alkoxysilane hydrolysis methods tend to generate linear, cyclic or cross-linked polysiloxanes with different degrees of polymerization during polycondensation due to the different degrees of hydrolysis of organosilicon monomers. The existence of the structure directly leads to the instability of the physical and chemical properties of the synthesized silicone resin