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Prepn process of mixable silicon rubber structure controlling agent

A technology of silicone rubber and structurant, applied in the field of preparation of kneading silicone rubber anti-structural agent, can solve the problems of high yield of volatile components, cumbersome and energy-consuming post-processing, difficult solvent recovery, etc., and achieve excellent anti-structural agent. performance, improved tear strength, and easy handling

Active Publication Date: 2006-03-01
ZHEJIANG XINAN CHEM INDAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process has problems such as difficult solvent recovery, environmental pollution, cumbersome post-treatment and energy consumption, more volatile components with lower boiling points in the product and low yield, etc.

Method used

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  • Prepn process of mixable silicon rubber structure controlling agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation of embodiment 1 mixing type silicone rubber anti-structural agent

[0028] Take 300g D 4 First carry out vacuum distillation to remove 15g of cyclic body and water, then add 60g of dimethyldimethoxysilane, stir evenly, heat up to 80°C, add 15g of granular activated clay (80 mesh), stir for 1 hour at constant temperature, and then slowly Slowly raise the temperature to 100°C and continue to stir and heat-retain for 3 hours, then cool down to 80°C, add 18g of water and heat-retain for 3 hours at 64°C, cool to room temperature, filter to remove activated clay, and distill the filtrate under reduced pressure to remove 30g of low-molecular substances, and finally obtain 310g Colorless, transparent liquid, the yield is 85%, and its viscosity is 11.5mm 2 / s, the hydroxyl content is 6.62% (mass percentage, the same below), and the methoxy content is 4.27%.

Embodiment 2

[0029] The preparation of embodiment 2 mixing type silicone rubber anti-structural agent

[0030] Take 300g D 4First carry out vacuum distillation to remove 15g of ring body and water, then add 58g of dimethyldiethoxysilane, stir evenly, then raise the temperature to 100°C, add 18g of cation exchange resin, stir and react at constant temperature for 1.5 hours, and then slowly raise the temperature to 110°C Continue to stir and keep warm for 3 hours at ℃, cool down to 90 ℃, add 21g of water at 78 ℃ and keep warm for 3 hours, cool to normal temperature, filter and remove activated clay, and obtain 340g of colorless, transparent liquid with a yield of 93% and a viscosity of 18.0 mm 2 / s, the hydroxyl content is 6.02%, and the ethoxy content is 3.86%.

Embodiment 3

[0031] Embodiment 3 Preparation of mixing type silicone rubber anti-structural agent

[0032] Take 300g of DMC and first carry out vacuum distillation to remove 15g of DMC and water, then add 60g of dimethyldimethoxysilane, stir evenly, heat up to 80°C, add 21g of activated clay (60 mesh), stir and react at constant temperature for 1 hour, and then Slowly raise the temperature to 100°C and continue to stir and keep warm for 3 hours, then cool down to 70°C, add 18g of water at 64°C and keep warm for 3 hours, then cool to normal temperature, filter to remove activated clay, and distill the filtrate under reduced pressure at 150°C (-0.1Mpa) Slough off 25g low-molecular matter, finally obtain 321g colorless, transparent liquid, yield 88%, and its viscosity is 13.5mm 2 / s, the hydroxyl content is 6.24% (mass percentage, the same below), and the methoxy content is 4.08%.

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Abstract

The preparation process of mixed silicon rubber structure controlling agent includes the following steps: 1. reflux reaction of dimethyl siloxane and dimethyl dialkoxyl silane under the action of acid solid catalyst to produce alpha, omega-dialkoxyl dimethyl siloxane oligomer; and 2. reflux reaction of alpha, omega-dialkoxyl dimethyl siloxane oligomer and water and post-treatment to obtain the mixed silicon rubber structure controlling agent. The preparation process needs no solvent, has low power consumption, simple post-treatment and high product yield.

Description

(1) Technical field [0001] The invention relates to a preparation method of a mixing type silicone rubber anti-structure agent. (2) Background technology [0002] Due to its excellent weather resistance, electrical properties, low compression set, heat resistance and cold resistance, the mixing type silicone rubber has been widely used in electrical appliances, automobiles, construction, medical and food. each field. [0003] In the production process, structuring can easily lead to problems such as poor processability of mixing silicone rubber, difficulty in re-milling, short storage period, poor rheology and high Mooney viscosity, which may easily cause product defects. Severely structured mixed rubber is tough and elastic like vulcanized rubber, and it is extremely difficult to re-mill, or even impossible to re-mill. Two methods can be used to treat reinforcing filler silica in advance and add anti-structural agent during mixing. The treatment of silica is to use oligos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/04C08G77/08
Inventor 王伟邵月刚詹学贵佘慧玲宋新锋
Owner ZHEJIANG XINAN CHEM INDAL GROUP
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