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1,2-ditrialkoxy silane crosslinking agent and preparation method and application thereof

A technology of bistrialkoxysilane and crosslinking agent, applied in the field of silicone rubber, can solve the problem of slow deep curing speed of vulcanized silicone rubber, and achieve the effects of improving slow deep curing, enhancing compatibility and wide application prospect.

Inactive Publication Date: 2016-05-18
兆舜科技(广东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The commonly used silicone crosslinking agent on the market is methyltrimethoxysiloxane or vinyltrimethoxysiloxane. The vulcanized silicone rubber prepared by this crosslinking agent has a slow curing speed in the deep layer, which limits its application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In this example, the 1,2-bistrialkoxysilane crosslinking agent was prepared from the following raw materials in parts by weight:

[0037] (CH 3 O) 3 SiH80 parts by weight

[0038] CH 2 =CHSi(OCH 2 CH 3 ) 3 100 parts by weight

[0039] 0.3 parts by weight of chloroplatinic acid;

[0040] The preparation method is as follows:

[0041] (1) the raw material (CH 3 O) 3 SiH and CH 2 =CHSi(OCH 2 CH 3 ) 3 Mix and stir for 1 hour at 25°C;

[0042] (2) Add chloroplatinic acid to the mixture liquid obtained in step (1), and stir for 0.5 hour at 25° C.;

[0043] (3) Heating to 65°C for 6 hours, vacuuming to remove low molecules, cooling down and discharging to obtain (CH 3 O) 3 SiCH 2 CH 2 Si(OCH 2 CH 3 ) 3 .

Embodiment 2

[0045] In this example, the 1,2-bistrialkoxysilane crosslinking agent was prepared from the following raw materials in parts by weight:

[0046] (CH 3 CH 2 O) 3 SiH100 parts by weight

[0047] CH 2 =CHSi(OCH 3 ) 3 80 parts by weight

[0048] 0.3 parts by weight of chloroplatinic acid;

[0049] The preparation method is as follows:

[0050] (1) the raw material (CH 3 CH 2 O) 3 SiH and CH 2 =CHSi(OCH 3 ) 3 Mix and stir for 3 hours at 20°C;

[0051] (2) Add chloroplatinic acid to the mixture liquid obtained in step (1), and stir for 1 hour at 20° C.;

[0052] (3) Heating to 50°C for 8 hours, vacuuming to remove low molecules, cooling down and discharging to obtain (CH 3 O) 3 SiCH 2 CH 2 Si(OCH 2 CH 3 ) 3 .

Embodiment 3

[0054] In this example, the 1,2-bistrialkoxysilane crosslinking agent was prepared from the following raw materials in parts by weight:

[0055] (CH 3 CH 2 O) 3 SiH90 parts by weight

[0056] CH 2 =CHCH 2 Si(OCH 2 CH 3 ) 3 90 parts by weight

[0057] 0.01 parts by weight of chloroplatinic acid;

[0058] The preparation method is as follows:

[0059] (1) the raw material (CH 3 CH 2 O) 3 SiH and CH 2 =CHCH 2 Si(OCH 2 CH 3 ) 3 Mix and stir for 2 hours at 25°C;

[0060] (2) Add chloroplatinic acid to the mixture liquid obtained in step (1), and stir at 30°C for 0.8 hours;

[0061] (3) Heating to 80°C for 3 hours, vacuuming to remove low molecules, cooling down and discharging to obtain (CH 3 CH 2 O) 3 SiCH 2 CH 2 CH 2 Si(OCH 2 CH 3 ) 3 .

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PUM

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Abstract

The invention provides a 1,2-ditrialkoxy silane crosslinking agent and a preparation method and application thereof. The 1,2-ditrialkoxy silane crosslinking agent has the structure as follows: (R1O)3SiCH2CH2(CH2)nSi(R2O)3, wherein the R1 and the R2 are independently any one of -CH3, -CH2CH3 or -CH2CH2CH3, and the n is an integer of 0-3. The 1,2-ditrialkoxy silane crosslinking agent prepared by means of the preparation method can strengthen the compatibility of a crosslinking agent and siloxane and has wide application prospect, deep curing is fast, the curing depth within 24 hours can reach 3-7 mm, and the shortcoming that a domestic dealcoholization type sealant is slow in deep curing can be overcome.

Description

technical field [0001] The invention belongs to the field of silicone rubber, and relates to a 1,2-bistrialkoxysilane crosslinking agent and a preparation method and application thereof. Background technique [0002] The silicone crosslinking agent contains two active groups with different properties on the same silicon atom, one is a silicon-functional reactive group, which can chemically react with the surface of the inorganic filler to form a Si-O-Si chemical bond; The other is a carbon-functional reactive group, which can react with an organic polymer and become an active ingredient of the polymer, so that two materials with very different properties can be well bonded. The silicone crosslinking agent acts as a bridging agent at the interface of two substances, and the chemical bond formed couples two substances with different properties. [0003] The commonly used silicone crosslinking agent on the market is methyltrimethoxysiloxane or vinyltrimethoxysiloxane. The vulc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/5419C08L83/04C07F7/18
CPCC08K5/5419C07F7/1804C07F7/1876C08L83/04
Inventor 翁祝强张彬孙鹏陈天广陈军
Owner 兆舜科技(广东)有限公司
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