Silane compound and preparation method thereof, and translucent dealcoholization type room temperature curing silicon rubber and preparation method thereof

Abstract

The present invention discloses a silane compound and a preparation method thereof, and a translucent dealcoholization type room temperature curing silicon rubber and a preparation method thereof. According to the present invention, amino-containing alkoxysilane and polyfunctional acrylate are subjected to a Michael addition reaction at a high temperature to synthesize novel alkoxysilane having a secondary amine structure and an ester structure, and the translucent dealcoholization type room temperature curing silicon rubber prepared by using the novel silane compound has characteristics of excellent storage stability, excellent adhesion with most substrates, especially polycarbonate, aluminum, copper and the like, and the like.

Description

technical field [0001] The invention relates to the field of silicone rubber, in particular to a silane compound and a preparation method thereof, and a translucent dealcoholized room temperature curing silicone rubber prepared from the silane compound and a preparation method thereof. Background technique [0002] In recent years, one-component room temperature curing silicone rubber has been widely used in electronic and electrical products due to its convenient use and storage, excellent adhesion to substrates, large product function adjustability, large technical content and excellent comprehensive performance after curing. Insulation sealing, elastic protection, bonding positioning, etc. [0003] Dealcoholized one-component room-temperature-curing silicone rubber has outstanding technical advantages due to its environmental protection, non-corrosion, low odor, and excellent heat and humidity resistance. In the dealcoholized silicone rubber, titanate and its chelate are...

AI Technical Summary

Problems solved by technology

In the dealcoholized silicone rubber, the product using titanate and its chelate as a catalyst, because the titanate chelate itself is yellow or red, makes it subject to certain restrictions on translucent products

At the same time, due to the high activity of the titanium catalyst, it can chemically interact with most organosilane tackifiers and lose its catalytic effect. Therefore, conventional organosilane tackifiers, such as γ-aminopropyltriethoxysilane, γ-glycidyl etheroxypropyltrimethoxysilane, γ-(methacryloxy)propyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, etc. It is limited to a certain extent, which leads to the problem that the adhesion of translucent dealcoholized silicone rubber to copper, PC, PMMA and other substrates is not high enough

[0004] A series of silicon-nitrogen heterocyclic tackifiers synthesized in the patent US 5945555 are added to translucent dealcoholized one-component silicone rubber. Although they have good adhesion to copper, PC and other substrates after curing, the curing speed is relatively slow. slow, and turbid after curing, which affects transparency; patent CN 101275016 B uses titanium catalyst in the form of oligomers to prepare room temperature vulcanized silicone rubber (RTV-1) type dealcoholized glue, which has the advantages of easy preparation, stable storage, and good adhesion to resins. Good advantage, but, have added filler in the system, cause transparency poor, and the titanium of oligomer form is difficult to catalyze the purchase, or difficult to control when synthesizing; Under the action of catalyst, the silicon-hydrogen bond can generate a certain amount of hydrogen with the dehydrogenation of silicon hydroxyl in silicone oil, which affects the stability; US596255A1 discloses a silazacyclopentane structure as a hydroxyl scavenger and auxiliary tackifier for Organotin-catalyzed dealcoholization type silica gel, but the synthesis process of this compound is complex, and its volatile matter has high toxicity; US5244938 introduces a silane compound containing polyalkoxy and ester groups as a hydroxyl scavenger for RTV-1 Dealcoholized fluorosilicone rubber, but the compound has a strong odor due to the use of acrylates in the synthesis process

[0005] Therefore, the synthesis of a new low-odor silane compound that helps to improve stability and adhesion is helpful for the preparation of a translucent dealcoholized room-temperature-curing silicone rubber that cures quickly, is stable in storage, and adheres well to most substrates. It has very important significance, but there are few reports on this aspect in current patents

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