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Novel crosslinker of single-component de-alcoholized room temperature vulcanized silicone rubber and preparation method thereof

A room temperature vulcanization and dealcoholization technology, which is applied in the field of silicone polymer processing additives, can solve the problems of non-curing during extrusion, poor physical and mechanical properties, and short storage period, and achieve the effect of improving storage stability

Inactive Publication Date: 2010-01-13
朱旭 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the crosslinking agent of most commercially available one-component dealcoholized room temperature vulcanized silicone rubber is methyltrimethoxysilane, and the storage period of this kind of one-component dealcoholized room temperature vulcanized silicone rubber is short Disadvantages of extrusion not curing or curing in a closed package) and poor physical and mechanical properties
[0004] So far, there have been no reports on the use of polyalkylmethoxysilane as a crosslinking agent for one-component dealcoholized room temperature vulcanized silicone rubber and its preparation method

Method used

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  • Novel crosslinker of single-component de-alcoholized room temperature vulcanized silicone rubber and preparation method thereof
  • Novel crosslinker of single-component de-alcoholized room temperature vulcanized silicone rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Add 10 moles of methyltrichlorosilane to a 2-liter four-necked bottle equipped with stirring, a reflux condenser (connected to a drying bottle and an exhaust pipe to discharge hydrochloric acid gas through the exhaust pipe), a thermometer, and a dropping funnel, and start stirring , 30 moles of methanol were gradually dropped in through the dropping funnel, and the temperature was lowered in an ice bath to control the reaction temperature below 30°C. After methanol was added dropwise, the ice bath was removed, and the mixture was stirred without heating for 1 hour. Then heat up to 80°C-120°C, and keep the reflux reaction for 3 hours (the reflux flow is small at the beginning, and the reflux flow is gradually increased). The reaction temperature is lowered to below 50°C, and 10 moles of water are gradually added dropwise under stirring, and the rate of addition is based on controlling the reaction temperature to be lower than 50°C. After dripping water, the mixture was ...

Embodiment 2

[0043] In a 2-liter four-necked bottle equipped with stirring, a reflux condenser (connected to a drying bottle and an exhaust pipe, and to discharge hydrochloric acid gas through the exhaust pipe), a thermometer, and a dropping funnel, add 5 moles of methyltrichlorosilane and 5 moles of Dimethyldichlorosilane was started to stir, and 25 moles of methanol were gradually dropped in through the dropping funnel, and the temperature was lowered in an ice bath to control the reaction temperature below 30°C. After methanol was added dropwise, the ice bath was removed, and the mixture was stirred without heating for 1 hour. Then heat up to 80°C-120°C, and keep the reflux reaction for 3 hours (the reflux flow is small at the beginning, and the reflux flow is gradually increased). The reaction temperature is lowered to below 50°C, and 10 moles of water are gradually added dropwise under stirring, and the rate of addition is based on controlling the reaction temperature to be lower than...

Embodiment 3

[0045] Add 10 moles of methyltrichlorosilane to a 2-liter four-necked bottle equipped with stirring, a reflux condenser (connected to a drying bottle and an exhaust pipe to discharge hydrochloric acid gas through the exhaust pipe), a thermometer, and a dropping funnel, and start stirring , 30 moles of methanol were gradually dropped in through the dropping funnel, and the temperature was lowered in an ice bath to control the reaction temperature below 30°C. After methanol was added dropwise, the ice bath was removed, and the mixture was stirred without heating for 1 hour. Then heat up to 80°C-120°C, and keep the reflux reaction for 3 hours (the reflux flow is small at the beginning, and the reflux flow is gradually increased). The reaction temperature was lowered to below 50°C, and 5 moles of water were gradually added dropwise under stirring, and the rate of addition was based on controlling the reaction temperature to be lower than 50°C. After dripping water, the mixture wa...

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Abstract

The invention relates to a method for synthesizing poly alkyl methoxy silane by taking alkylchlorosilane or alkyl methoxy silane as main raw materials, or the poly alkyl methoxy silane replaces methyl trimethoxy silane and other crosslinkers partially or wholly for being used as a novel crosslinker of single-component de-alcoholized room temperature vulcanized silicone rubber, so as to lead the storage stability and the physical mechanical properties (fracture tensile strength and fracture elongation) after being solidified to be improved.

Description

Technical field: [0001] The invention relates to an auxiliary agent for organic silicon polymer processing, its synthesis method and application. It specifically relates to a method for synthesizing polyalkylmethoxysilane by using alkylchlorosilane or alkylmethoxysilane as the main raw material, and using the polyalkylmethoxysilane as a new type of one-component dealcoholization type room temperature vulcanized silicone rubber crosslinking agent. Background technique: [0002] One-component dealcoholized room temperature vulcanized silicone rubber (also known as one-component alcohol-type RTV silicone rubber, which can be referred to as alcohol-type RTV-1 silicone rubber) will not corrode almost all substrates, and is resistant to various substrates. Good adhesion, so far it has been widely used as a sealing adhesive in construction, electronics, aerospace, automobile industry, medicine and health, etc. With the widespread use of building curtain walls, silicone building s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/18C08G77/06C08J3/24C08L83/06
Inventor 朱旭廖俊朱鹏
Owner 朱旭
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