Low compression set liquid silastic and preparation method thereof

A technology of liquid silicone rubber and permanent deformation, which is applied in the field of addition-type liquid silicone rubber. It can solve the problems of low hardness and dimensional stability, and cannot meet low compression permanent deformation at the same time, so as to improve compression permanent deformation, low hardness and low hardness. Effect

Active Publication Date: 2014-03-12
ZHEJIANG XINAN CHEM INDAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

None of these compositions can simultaneously satisfy...

Method used

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  • Low compression set liquid silastic and preparation method thereof
  • Low compression set liquid silastic and preparation method thereof
  • Low compression set liquid silastic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Basic rubber formula (1):

[0038] formula

Vinyl polysiloxane

filler

Auxiliary

Types of

Viscosity 50,000 centipoise Vinyl content 0.8%

Precipitated silica

Hexamethyldisilazane

Fraction

100

30

6

[0039] Liquid silicone rubber formula:

[0040] formula

Embodiment 2

[0042] Basic rubber formula:

[0043] formula

Vinyl polysiloxane

filler

Auxiliary

Types of

Viscosity 50,000 centipoise Vinyl content 0.8%

Precipitated silica

Hexamethyldisilazane

Fraction

100

40

8

[0044] Liquid silicone rubber formula:

[0045] formula

Embodiment 3

[0047] Basic rubber formula:

[0048] formula

Vinyl polysiloxane

filler

Auxiliary

Types of

Viscosity 50,000 centipoise Vinyl content 0.8%

Aluminum oxide

KH-560

Fraction

100

40

1

[0049] Liquid silicone rubber formula:

[0050] formula

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PUM

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Abstract

The invention relates to a low compression set liquid silastic and a preparation method thereof. The low compression set liquid silastic is prepared from components A and B according to a certain mass ratio, wherein the component A is prepared from the following components in parts by weight: 100 parts of liquid silastic base rubber and 0.2-0.5 part of a catalyst; the component B is prepared from following components in parts by weight: 100 parts of liquid silastic base rubber, 6-25 parts of a crosslinking agent and 0.1-0.3 part of an inhibitor.

Description

technical field [0001] The invention relates to a liquid silicone rubber with low compression set and a preparation method thereof, mainly referring to a liquid silicone rubber product with low compression set, high rebound and low hardness after molding, and belongs to the technical field of addition-type liquid silicone rubber. Background technique [0002] Because liquid silicone rubber has excellent properties such as high and low temperature resistance, ultraviolet resistance, radiation resistance, weather resistance, electrical insulation, high air permeability, and physiological inertia, it is widely used in aviation, aerospace, electronic appliances, chemicals, machinery, medicine, daily necessities, etc. has been widely applied. Silicone rubber for rubber rollers used in laser printers, copiers, fax machines, and ATMs requires properties such as low hardness, low compression set, and dimensional stability. [0003] Compositions having low compression set upon cross...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/05C08K5/05C08K3/36C08K3/34C08K5/5445C08K5/5435C08L83/06
Inventor 王伟陈丽云谢亚军邓圣志宋新锋周海峰
Owner ZHEJIANG XINAN CHEM INDAL GROUP
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