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A kind of preparation method of two-component condensation type room temperature vulcanization silicone rubber curing agent

A room temperature vulcanization and condensation type technology, applied in the direction of tin organic compounds, etc., can solve the problems of low stability and high organic tin content, and achieve the effects of small performance changes, high stability, and changing operation and vulcanization time

Inactive Publication Date: 2016-04-13
深圳市红叶杰科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention proposes a method for preparing a two-component condensation type room temperature vulcanized silicone rubber curing agent. The curing agent obtained by this method solves the problems of low stability and high organotin content in conventional methods.

Method used

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  • A kind of preparation method of two-component condensation type room temperature vulcanization silicone rubber curing agent
  • A kind of preparation method of two-component condensation type room temperature vulcanization silicone rubber curing agent
  • A kind of preparation method of two-component condensation type room temperature vulcanization silicone rubber curing agent

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] According to the method disclosed in the present invention, the inventor has carried out the following operations:

[0023] Mix ethyl orthosilicate and dibutyltin laurate in a weight ratio of 6:1, wherein, ethyl orthosilicate is 360g, dibutyltin dilaurate is 60g, and macroporous strong acid cations are added Exchange resin 70g, react for 15min, add 3g of water to continue the reaction for 1.5h, and obtain the finished product 1.

Embodiment 2

[0025] Add 0.5% tetraisopropyl titanate to finished product 1 to obtain finished product 2.

Embodiment 3

[0027] With the following raw materials: tetraethyl orthosilicate 490g, dibutyltin dilaurate 62g, methyltrimethoxysilane 85g, pure water 3g, macroporous strong acid cation exchange resin 75g is prepared according to the method in embodiment 1, obtains Finished product3.

[0028] The inventor made the finished product 1 made in August, and the operation time was 61 minutes when doing the vulcanization experiment, and stored it until February of the next year (the temperature was slightly lower than August) to continue the vulcanization experiment, and the operation time was 67 minutes, almost the same as before. At the same time, the vulcanization time is about 5 hours.

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Abstract

The invention provides a preparation method of a two-component condensed type room temperature vulcanized silicone rubber curing agent. The curing agent is prepared by reacting tetraethoxysilane and dibutyltin dilaurate under the catalysis of macroreticular strong-acid cation exchange resin. The curing agent prepared by the method has the advantages of good stability and proper heavy metal content, and the method is simple to operate.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a preparation method of a two-component condensation type room temperature vulcanized silicone rubber curing agent. Background technique [0002] Two-component condensation type room temperature vulcanized silicone rubber is a product with relatively mature technology, and people are used to express it with RTV-2. RTV-2 has excellent electrical insulation, arc resistance, water resistance, weather resistance, ozone and other properties, and also has excellent mold release properties, so it is widely used in the reproduction and reproduction of cultural relics, handicrafts, toys, artificial leather, electronic appliances, instruments and meters, etc. Manufactured, its raw rubber is usually hydroxyl-terminated polydimethylsiloxane, the structural formula is: [0003] [0004] There are many cross-linking agents capable of condensation reaction with the -OH of its terminal group...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08K5/57C08K5/101C08K5/5415C07F7/22
Inventor 李贵宾
Owner 深圳市红叶杰科技有限公司
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