Dibutyltin dilaurate catalyzes the method for synthesizing methoxyxime ketone silane

Abstract

The invention discloses a method for synthesizing methoxyssilane under catalysis of dibutyltin dilaurate, and relates to the cross-linking field. The method comprises the following steps of adding 1 part of tetramethoxysilane, 0.2-2.5 parts of diacetylmonoxime and 0.0005-0.005 part of dibutyltin dilaurate in parts by weight to a reaction kettle with a gaseous-phase extraction device, stirring for reacting for 3-7 hours under the condition that the temperature in the reaction kettle is in the range from 121 DEG C to 129 DEG C and then obtaining a product to be distilled, distilling the product to be distilled under the conditions of a temperature ranging from 100 DEG C to 120 DEG C and pressure ranging from -0.095 MPa to -0.098MPa, and then obtaining a methoxyssilane compound. According to the method, the dibutyltin dilaurate can be taken as a catalyst for molding silicone rubber by vulcanizing at the room temperature, and also can be left in the reaction products after the reaction is completed, and the reaction steps are quite simple; the tetramethoxysilane is taken as the raw material of the method so that the synthesis cost of the method is quite low.

Description

technical field [0001] The invention relates to the field of crosslinking agents, in particular to a method for catalyzing the synthesis of methoxyximeketosilane by dibutyltin dilaurate. Background technique [0002] Existing room temperature vulcanized silicone rubber usually uses methyl tributylketoxime silane, tetrabutyl ketoxime silane, methyl trimethoxysilane and oxime ketone methoxy silane compound as cross-linked silicone rubber in the curing molding process. Linking agent to realize the curing and molding of room temperature vulcanized silicone rubber. [0003] When methyl tributylketoxime silane is used as a crosslinking agent, the curing speed of room temperature vulcanized silicone rubber is relatively slow; when tetrabutylketoxime silane is used as a crosslinking agent, due to the high freezing point (about 40°C), tetrabutylketoxime silane is easy to crystallize when used, which makes it difficult to control the curing and molding speed of room temperature vulca...

AI Technical Summary

Problems solved by technology

The boiling point of the amine compound and the methoxyxime ketone silane complex is relatively close, and it is difficult to separate the amine compound from the methoxy oximone silane complex; the synthetic crosslinking agent crosslinks due to the residue of the amine compound in the reaction product. The linkage activity is low, and the reaction product of amino compound remains and it is easy to turn yellow after long-term storage

[0008] (2) The methoxyxime ketone-based silane compound uses chlorosilane and organochlorosilane as raw materials. The reaction between chlorosilane and organochlorosilane will produce hydrogen chloride gas, which will pollute the environment, and there are certain hidden dangers in safety