Thermal resistant mixed silicon rubber and preparation method thereof

A technology of mixing silicone rubber and silicone rubber raw rubber, which is applied in the field of silicone rubber, can solve problems such as decomposition, high temperature aging of silicone rubber, loss of use value, etc., and achieve the effects of reducing the amount of addition, good binding force, and improving compatibility

Inactive Publication Date: 2018-12-21
莆田市涵江华源电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Under high temperature conditions, silicone rubber is easily decomposed by heat to form free oxygen radicals, which attack the main chain of silicone rubber molecules, causing the molecular structure of rubber to decompose, resulting in high temperature aging of silicone rubber and loss of use value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0039] The modified liquid crystal polyester amide is prepared by the following method: in parts by weight, 10 parts of liquid crystal polyester amide, 1-2 parts of hindered amine light stabilizer, 0.5-1 part of glyceryl tristearate, hydroxyl 0.5-1 part of propyl methylcellulose, mixed uniformly, the obtained mixture is put into a twin-screw extruder for melting and mixing, and then extruded, drawn, cooled and granulated to obtain the modified liquid crystal polyester amide.

[0040] The catecholethylamine modified silicon dioxide is prepared by the following method: silicon dioxide, catecholethylamine, and fluorosilane coupling agent are mixed according to the mass ratio of 1:0.5-0.8:0.3-1 to obtain a modified The raw material is 1:100-200 according to the mass ratio of the modified raw material and the alkaline buffer solution, and the modified raw material is added to a pH 8.0-9.0 alkaline buffer solution, filtered after reacting at room temperature for 2-3 hours, and washed...

Embodiment 1

[0048] A preparation method for heat-resistant mixing silicone rubber:

[0049] (1) Preparation of modified liquid crystal polyester amide: in parts by weight, take 10 parts of liquid crystal polyester amide, 1.5 parts of hindered amine light stabilizer, 0.7 part of glyceryl tristearate, and 0.8 part of hypromellose. The materials are mixed evenly, and the obtained mixture is put into a twin-screw extruder for melting and kneading, and then extruded, drawn, cooled, and granulated to obtain a modified liquid crystal polyester amide;

[0050] (2) Preparation of catecholethylamine-modified silica: mix silica, catecholethylamine, and fluorosilane coupling agent at a mass ratio of 1:0.65:0.75 to obtain modified raw materials. The mass ratio to the alkaline buffer solution is 1:180, the modified raw material is added to the alkaline buffer solution with a pH of 8.5, reacted at room temperature for 2.5 hours, filtered, washed, and dried to obtain catecholethylamine modified dioxide ...

Embodiment 2

[0065] A preparation method for heat-resistant mixing silicone rubber:

[0066] (1) Preparation of modified liquid crystal polyester amide: in parts by weight, take 10 parts of liquid crystal polyester amide, 1 part of hindered amine light stabilizer, 0.5 part of glyceryl tristearate and 0.5 part of hypromellose, and mix The materials are mixed evenly, and the obtained mixture is put into a twin-screw extruder for melting and kneading, and then extruded, drawn, cooled, and granulated to obtain a modified liquid crystal polyester amide;

[0067] (2) Preparation of catecholethylamine-modified silica: mix silica, catecholethylamine, and fluorosilane coupling agent at a mass ratio of 1:0.5:0.3 to obtain modified raw materials. The mass ratio to the alkaline buffer solution is 1:100, the modified raw material is added to the alkaline buffer solution with a pH of 8.0, reacted at room temperature for 2 hours, filtered, washed, and dried to obtain catecholethylamine modified dioxide ...

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PUM

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Abstract

The invention belongs to the technical filed of silicon rubber and in particular discloses thermal resistant mixed silicon rubber and a preparation method thereof. The thermal resistant mixed siliconrubber is prepared from the following raw materials in parts by weight: 100 parts of crude silicon rubber, 8-12 parts of modified liquid crystal polyesteramide, 25-30 parts of catechol modified silicon dioxide, 3-5 parts of a plasticizer, 3-5 parts of a thermal resistant additive, 2-10 parts of a vulcanizing agent and 0.5-1 part of a defrosting compound, wherein the modified liquid crystal polyesteramide is prepared from 10 parts of liquid crystal polyesteramide, 1-2 parts of a hindered amine light stabilizer, 0.5-1 part of glyceryl tristearate and 0.5-1 part of hydroxypropyl methylcellulose.The thermal resistant mixed silicon rubber is low in cost and simple and convenient in process, and the prepared silicon rubber is high in thermal strength, excellent in comprehensive property and convenient in industrial popularization and application.

Description

technical field [0001] The invention relates to the technical field of silicone rubber, in particular to a heat-resistant mixing silicone rubber and a preparation method thereof. Background technique [0002] Silicone rubber refers to the rubber whose main chain is composed of silicon and oxygen atoms alternately, and there are usually two organic groups attached to the silicon atoms. As an important synthetic rubber, silicone rubber has important applications in the fields of life and scientific research. [0003] Under high temperature conditions, silicone rubber is easily decomposed by heat to form free oxygen radicals, which attack the main chain of silicone rubber molecules, causing the molecular structure of rubber to decompose, resulting in high temperature aging of silicone rubber and loss of use value. With the development of science and technology, higher requirements are put forward for the heat resistance of silicone rubber. In addition, with the improvement of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/04C08L77/12C08K13/06C08K9/04C08K9/06C08K3/36C08K5/103C08K3/22
CPCC08K2003/2231C08K2201/011C08L83/04C08L2201/02C08L2201/08C08L2205/025C08L2205/03C08L77/12C08K13/06C08K9/04C08K9/06C08K3/36C08K5/103C08K3/22
Inventor 何建华
Owner 莆田市涵江华源电子有限公司
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