High-tear strength silicone rubber and preparation method thereof

A silicone rubber, high resistance technology, applied in the field of silicone rubber material preparation, can solve the problem of increasing the production cost of silicone rubber, the failure of finished products to meet the requirements of practical applications, the hardness, elasticity, and heat resistance of silicone rubber. Tensile strength at break, etc. Problems such as the decline of physical comprehensive performance can save production time, ensure scientificity and safety, and improve tear strength.

Active Publication Date: 2014-03-26
QINGDAO HUILU SILICONE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method not only increases the production cost of silicone rubber, but also makes the physical comprehensive properties of silicone rubber such as hardness, elasticity, heat resistance, and tensile strength at break drop rapidly, and the finished products produced still cannot meet the requirements of practical applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0042] In addition, the present invention also provides a preparation method of the above-mentioned high tear-resistant silicone rubber, comprising the following steps:

[0043] (1) Put 100 parts of methyl vinyl raw rubber, 0.5-2 parts of hydroxyl silicone oil, 0.5-1 part of vinyltrimethoxysilane, and 0.1-0.4 parts of release aid into a kneader for kneading;

[0044] (2) Add 30-60 parts of white carbon black in 3 to 5 batches, mix to form a mass, heat up and vacuumize;

[0045] (3) After cooling to 60-80°C, add 4-6 parts of vinyl silicone oil in 3 to 5 batches, mix it into a ball and pack it out to obtain high tear-resistant silicone rubber.

[0046] The preparation method of the high-tear-resistant silicone rubber also includes: while adding vinyl silicone oil in step (3), 3-7 parts of hydrogen-containing silicone oil are also added to accelerate the reinforcement of the vinyl silicone oil to the silicone rubber network structure effect.

[0047] Described film release aid ...

Embodiment 1

[0057]A high tear-resistant silicone rubber, its raw materials include: 100 parts of methyl vinyl raw rubber, 40 parts of surface-treated fumed silica, 5 parts of vinyl silicone oil, 5 parts of hydrogen-containing silicone oil, 1 part of hydroxyl silicone oil, vinyl 0.8 part of trimethoxysilane, 0.3 part of zinc stearate as a release aid. Among them, the vinyl content of vinyl silicone oil is 8%; the hydrogen content of hydrogen silicone oil is 1.5%.

Embodiment 2

[0059] A high tear-resistant silicone rubber, its raw materials include: 100 parts of methyl vinyl raw rubber, 30 parts of fumed silica, 4 parts of vinyl silicone oil, 3 parts of hydrogen-containing silicone oil, 0.5 parts of hydroxyl silicone oil, vinyl trimethoxy 0.5 part of silane, 0.1 part of calcium stearate as a release aid. Among them, the vinyl content of vinyl silicone oil is 5%; the hydrogen content of hydrogen-containing silicone oil is 0.5%.

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PUM

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Abstract

The invention discloses high-tear strength silicone rubber which comprises the following raw materials: 100 parts of methylvinyl crude rubber, 30-60 parts of white carbon black, 4-6 parts of vinyl silicone oil, 0.5-2 parts of hydroxyl silicone oil, 0.5-1 part of vinyltrimethoxy silane and 0.1-0.4 part of demoulding auxiliary. The invention also discloses a preparation method of the high-strength silicone rubber, which comprises the following steps: (1) putting the methylvinyl crude rubber, hydroxyl silicone oil, vinyltrimethoxy silane and a demoulding auxiliary into a kneading machine for kneading; (2) adding the white carbon black in 3-5 batches, mixing into agglomerate, heating and vacuumizing; and (3) cooling to 60-80 DEG C, adding the vinyl silicone oil in 3-5 batches, mixing into agglomerate and discharging and packaging to obtain the high-strength silicone rubber. In the invention, by adding the vinyl silicone oil into the raw materials of the high-strength silicone rubber, the tear strength of silicone rubber is remarkably improved while guaranteeing the hardness, elasticity, heat resistance and tensile strength of the silicone rubber; and the preparation method is simple in process, and the production efficiency is high.

Description

technical field [0001] The invention relates to the preparation of silicone rubber materials, in particular to a silicone rubber with high tear strength and a preparation method thereof. Background technique [0002] Silicone rubber refers to a type of elastomer whose main molecular chain is -Si-O-inorganic structure and the side chain is an organic group. It has good high and low temperature resistance, strong corrosion resistance, aging resistance and excellent electrical insulation properties. And other characteristics, are widely used in electrical appliances, communications, aviation, medical, food and other fields. However, since silicone rubber is a straight-chain polymer structure, the molecular chain is very supple, and the interaction force between the chains is weak, resulting in poor mechanical strength, bonding strength, and weak tear resistance, so it has been widely used in practical applications. many restrictions. [0003] In order to improve its tear resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/06C08L83/05C08K9/00C08K3/36C08K5/098
Inventor 栾义生
Owner QINGDAO HUILU SILICONE CO LTD
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