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Silicone rubber for low-compression-set rubber roller and preparation method thereof

A permanent deformation and low compression technology, which is applied in the field of silicone rubber for low compression permanent deformation rubber rollers and its preparation, can solve the problems of poor heat resistance, high compression set rate, and poor compression set rate, and achieve excellent mechanical properties , The effect of low temperature resistance

Inactive Publication Date: 2020-06-09
GUANGDONG POLYSIL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent document CN104262973A, date of publication 2015.01.07 discloses a mixed silicone rubber material for industrial rubber rollers. In this invention, polymethylvinylsilsesquioxane spherical micropowder is added to the mixed silicone rubber, and the rubber roller after vulcanization No adhesion on the surface, low coefficient of friction, but poor heat resistance, high compression set
The silicone rubber material obtained in this invention has good compression deformation rate and excellent aging resistance after vulcanization, but the liquid silicone rubber used in it has high equipment requirements and more complicated processes in the process of processing and use.
[0005] To sum up, some progress has been made on silicone rubber materials for rubber rollers, but there are still deficiencies such as complex preparation process, poor compression set rate and poor heat resistance.

Method used

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  • Silicone rubber for low-compression-set rubber roller and preparation method thereof
  • Silicone rubber for low-compression-set rubber roller and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Each raw material composition is as follows:

[0077] 50 parts of methyl vinyl silicone rubber with a molar mass of 600,000 g / mol and a vinyl content of 0.16%, 50 parts of methyl vinyl silicone rubber with a molar mass of 600,000 g / mol and a vinyl content of 0.22% 50 parts of glue, BET method specific area is 200m 2 35 parts of fumed silica per g, 55 parts of silicon micropowder with a particle size of 1.5 μm, 2 parts of hexamethyldisilazane, 2 parts of dimethyldimethoxysilane, 1 part of deionized water, 1 part of nano-titanium dioxide with a particle size of 5nm, 1 part of nano-cerium oxide with a particle size of 7nm, 0.2 part of zinc stearate, 0.1 part of stearic acid, 2,5-dimethyl-2,5-di-tert-butyl peroxide 1.2 parts of hexane oxide.

[0078] The preparation method of silicone rubber is as follows:

[0079] A. Add all methyl vinyl silicone rubber raw rubber and part of white carbon black into the kneader, then pour hexamethyldisilazane, dimethyldimethoxysilane, d...

Embodiment 2

[0084] Each raw material composition is as follows:

[0085] 60 parts of methyl vinyl silicone rubber with a molar mass of 700,000 g / mol and a vinyl content of 0.15%, 60 parts of methyl vinyl silicone rubber with a molar mass of 500,000 g / mol and a vinyl content of 0.25% 40 parts of glue, the specific area of ​​BET method is 150m 2 40 parts per gram of fumed silica, 50 parts of silicon micropowder with a particle size of 1 μm, 3 parts of hexamethyldisilazane, 3 parts of dimethyldimethoxysilane, 2 parts of deionized water, granules 0.5 parts of nano-titanium dioxide with a particle size of 7nm, 1.5 parts of nano-cerium dioxide with a particle size of 7nm, 0.2 parts of zinc stearate, 0.2 parts of stearic acid, 2,5-dimethyl-2,5-di-tert-butyl peroxide 1.0 parts of hexane oxide.

[0086] The preparation method of silicone rubber is the same as that of Example 1.

Embodiment 3

[0088] Each raw material composition is as follows:

[0089] 40 parts of methyl vinyl silicone rubber with a molar mass of 650,000 g / mol and a vinyl content of 0.18%, 40 parts of methyl vinyl silicone rubber with a molar mass of 550,000 g / mol and a vinyl content of 0.20% 60 parts of glue, BET method specific area is 380m 2 30 parts / g of fumed silica, 60 parts of silicon micropowder with a particle size of 2 μm, 1 part of hexamethyldisilazane, 1 part of dimethyldimethoxysilane, 1 part of deionized water, hard 0.1 part of zinc fatty acid, 0.1 part of stearic acid, and 0.8 part of 2,5-dimethyl-2,5-di-tert-butylperoxyhexane.

[0090] The preparation method of silicone rubber is the same as that of Example 1.

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Abstract

The invention discloses silicone rubber for a low-compression-set rubber roller. The low-compression-set rubber roller comprises the following components in parts by weight: 100 parts of raw methyl vinyl silicone rubber, 30 to 40 parts of white carbon black, 50 to 60 parts of silica powder, 0.5 to 2 parts of nanometer titanium dioxide, 0.5 to 2 parts of nanometer cerium oxide, 2-6 parts of a structured control agent, 1 to 2 parts of deionized water, 0.1 to 0.5 part of a release agent and 0.5-1.5 parts of 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane. The invention also provides a preparation method of the silicone rubber for the low-compression-set rubber roller. The prepared silicone rubber for the low-compression-set rubber roller is low in cost, simple in process and excellent in physicalperformance, and has low compression set performance, high heat resistance and the like.

Description

【Technical field】 [0001] The invention relates to the field of polymer materials, in particular to a silicone rubber for low compression set rubber rollers and a preparation method thereof. 【Background technique】 [0002] Rubber rollers are a main variety of rubber products, widely used in metallurgy, papermaking, fiber textiles, printing and dyeing, wood processing, plastic film processing, office equipment manufacturing and other industries, and are important industrial accessories. Various rubber roller materials made of silicone rubber with heat resistance, low compression set, and anti-adhesive properties are widely used in office supplies such as photocopiers, fax machines, computers, and various industrial rubber rollers. With the expansion of the application field of rubber rollers, people's requirements for rubber rollers are gradually increasing. Many rubber rollers are now required to have good compression set, heat resistance, heat transfer, dimensional stabilit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08K13/04C08K7/26C08K3/36C08K3/22C08K5/14C08K5/5445C08K5/5419
CPCC08K2003/2213C08K2003/2241C08K2201/003C08K2201/011C08L83/04C08L2201/08C08L2205/025C08K13/04C08K7/26C08K3/36C08K3/22C08K5/14C08K5/544C08K5/5419
Inventor 贡玉圭王丰马汉喜
Owner GUANGDONG POLYSIL TECH CO LTD
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