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Silicon rubber mixings composition and method for making same

A technology of rubber compound and composition, which is applied in the field of silicone rubber compound compound and its preparation, and can solve the problems such as poor reinforcing performance of compound rubber

Active Publication Date: 2011-05-18
ZHEJIANG XINAN CHEM INDAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this existing preparation method is that the reinforcing performance of the prepared mixed rubber is not very good

Method used

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  • Silicon rubber mixings composition and method for making same
  • Silicon rubber mixings composition and method for making same
  • Silicon rubber mixings composition and method for making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] The average degree of polymerization is 8000, 100 parts by weight of methyl vinyl raw rubber with a vinyl content of 0.08 mol%, 3 parts by weight of hydroxy silicone oil (viscosity at 25°C is 15mm 2 / s, the structuring control agent of hydroxyl content is 6.0%) and the anti-yellowing agent (KF-99, hydrogen content is 1.54%, Japan Shin-Etsu Company production) of 0.5 weight part once drops into the kneading of preheating insulation 80 ℃ 1 hour In the machine, add white carbon black in 3 times [the specific surface area is 380m 2 6 parts by weight of fumed silica (Aerosil380, produced by Degussa company) with an average particle diameter of 20 nm and a specific surface area of ​​180 m 2 / g, precipitation method silica (TMG, produced by Jilin Tonghua Co., Ltd.) with an average particle size of 1 μm], after kneading each component, the glue is released, the glue is divided into blocks, stored for 2 hours, and then put into In the kneader, the temperature is raised to about...

Embodiment 2

[0082] In addition to changing the fumed white carbon black (Aerosil380, produced by Degussa company) to 10 parts by weight and the specific surface area is 180m 2 / g, the precipitated white carbon black (TMG, produced by Jilin Tonghua Co., Ltd.) with an average particle diameter of 1 μm is changed to 33 parts by weight, except adding in 4 times, other components are as in Example 1, each component is kneaded, and glue is produced , divide the rubber material into block materials, store it for 1 hour, and then put it into the kneader (or internal mixer) and heat it up to about 170°C for high-temperature banburying, heat preservation, removal of low molecular weight, glue out, and the rubber material Divide into sheet-like rubber material, cool for 1 hour, carry out kneading, filter the rubber to obtain the mixed rubber, operate in the same way as in the embodiment, prepare curable silicone rubber and rubber sheet, detect its mechanical properties, processability and yellowing p...

Embodiment 3

[0084] In addition to changing the fumed silica (Aerosil380, produced by Degussa Company) to 21 parts by weight and the specific surface area is 180m 2 / g, the precipitated white carbon black (TMG, produced by Jilin Tonghua Co., Ltd.) with an average particle diameter of 1 μm is changed to 22 parts by weight, and the same operation as in Example 1 is performed to prepare curable silicone rubber and rubber sheet, and detect its mechanical properties , processability and yellowing performance, the results are shown in Tables 1 and 2.

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Abstract

The invention provides a silicone rubber compound and a preparation method thereof. The silicone rubber compound comprises (A) poly-organo-siloxanes containing at least two alkenes, (B) polysiloxane or organosilane, (C) the mixture, whose specific surface area is 50m<2> / g, composed by gas white carbon black and deposition white carbon black, (D) yellow-resistant agent and (E) curing agent. According to the preparation method which separates the combination and the refinement, the thus obtained silicone rubber compound has a good processability and stable storage, and the mechanical property of the silicon rubber compound is not decreased.

Description

(1) Technical field [0001] The invention relates to a silicone rubber compound composition and a preparation method thereof. (2) Background technology [0002] Due to its excellent heat resistance, cold resistance, environmental resistance, electrical insulation, low compression set and fatigue resistance, silicone rubber compounds have been widely used in electronics, electrical, Machinery manufacturing, chemical industry, food, daily necessities, medical and health and other fields. In recent years, the performance requirements of silicone rubber have been increasing, and the development of silicone rubber compounds with excellent performance is imminent. [0003] Silicone rubber compound is obtained by kneading, kneading and filtering with methyl vinyl silicone rubber raw rubber with additives and reinforcing fillers. Reinforcing fillers generally use silica fumed or precipitated silica. Since the specific surface area of ​​silica exceeds 100m 2 / g, and there are a lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/00C08L83/04
Inventor 王伟詹学贵邵月刚邓冬云佘慧玲
Owner ZHEJIANG XINAN CHEM INDAL GROUP