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Thixotropic foam silicone rubber and preparation method thereof

A silicone rubber and foam technology, applied in the field of thixotropic foamed silicone rubber and its preparation, can solve the problems of complex process, limited application of foamed silicone rubber, and high preparation cost of thixotropic silicone rubber, and achieves wide application, low cost and smooth surface. Effect

Active Publication Date: 2018-01-05
CHENGDU GUIBAO SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the above-mentioned patents and related documents, it can be seen that the preparation cost of existing thixotropic silicone rubber is relatively high, and the process is relatively complicated, which greatly limits the application of foamed silicone rubber.

Method used

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  • Thixotropic foam silicone rubber and preparation method thereof
  • Thixotropic foam silicone rubber and preparation method thereof
  • Thixotropic foam silicone rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A thixotropic foam silicone rubber, which is prepared by mixing component A and component B according to an equal mass ratio; component A:

[0040]

[0041] B component:

[0042]

[0043] Weigh the required raw materials for A and B components according to the above formula:

[0044] Weigh α, ω-hydroxyl-terminated polydimethylsiloxane, heavy calcium carbonate, vinyl silicone oil and carbon black into a kneader according to the amount, dehydrate and knead for 180 minutes at a temperature of 120°C under vacuum, and cool to obtain Base A. Then add the base material A, hydrogen-containing silicone oil, and diallyl maleate into the planetary mixer, mix for 15 minutes, then add rod-shaped calcium carbonate according to the amount, stir and mix for 30 minutes, and vacuum stir for 20 minutes to obtain component A.

[0045]Weigh α, ω-hydroxyl-terminated polydimethylsiloxane, vinyl silicone oil and heavy calcium carbonate into a kneader, knead at a temperature of 120°C fo...

Embodiment 2

[0048] A thixotropic foam silicone rubber, which is prepared by mixing component A and component B according to an equal mass ratio; component A:

[0049]

[0050]

[0051] B component:

[0052]

[0053] Weigh the required raw materials for A and B components according to the above formula:

[0054] Weigh α, ω-hydroxyl-terminated polydimethylsiloxane, quartz sand, vinyl silicone oil and carbon black into a kneader according to the amount, dehydrate and knead for 240 minutes at a temperature of 130°C under vacuum, and cool to obtain the base material a. Then add the base material A, hydrogen-containing silicone oil, and diallyl maleate into the planetary mixer, mix for 15 minutes, then add rod-shaped calcium carbonate according to the amount, stir and mix for 30 minutes, and vacuum stir for 20 minutes to obtain component A.

[0055] Weigh α, ω-hydroxyl-terminated polydimethylsiloxane, vinyl silicone oil and heavy calcium carbonate into a kneader, knead at a temperatu...

Embodiment 3

[0058] A thixotropic foam silicone rubber, which is prepared by mixing component A and component B according to an equal mass ratio; component A:

[0059]

[0060] B component:

[0061]

[0062] Weigh the required raw materials for A and B components according to the above formula:

[0063] Weigh α, ω-terminated hydroxyl polydimethylsiloxane, heavy calcium carbonate, vinyl silicone oil and phthalocyanine blue into a kneader, dehydrate and knead for 180 minutes at a temperature of 120°C in a vacuum state, and cool down. Get base material A. Then add the base material A, hydrogen-containing silicone oil, and phenylacetylene into the planetary mixer, mix for 15 minutes, then add rod-shaped calcium carbonate according to the amount, stir and mix for 30 minutes, and vacuum stir for 20 minutes to obtain component A.

[0064] Weigh α, ω-hydroxyl-terminated polydimethylsiloxane, vinyl silicone oil and heavy calcium carbonate into a kneader, knead at a temperature of 120°C for ...

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Abstract

The invention discloses thixotropic foam silicone rubber. The thixotropic foam silicone rubber is prepared by mixing a component A and a component B according to equivalent mass; the component A is prepared from 100 parts by weight of alpha, omega-hydroxy-terminated poly-dimethylsiloxane, 4 to 10 parts by weight of vinyl-terminated silicone oil, 10-40 parts by weight of containing hydrogen silicone oil, 0.4 to 1.0 part by weight of inhibitors, 15 to 40 parts by weight of thixotropic agents, 30 to 50 parts by weight of reinforcing filler and 0.5 to 1 part by weight of color matching agents; thecomponent B is prepared from 100 parts by weight of alpha, omega-hydroxy-terminated poly-dimethylsiloxane, 4 to 10 parts by weight of vinyl-terminated silicone oil, 5 to 10 parts of hydroxy-terminated silicone oil, 30 to 70 parts of reinforcing filler, 0.8 to 1.5 parts by weight of catalysts and 15 to 40 percent of thixotropic agents. At room temperature, the components A and B which are uniformly mixed are applied to a sealed part within 10 to 20 minutes, and are subjected to standing and foaming to obtain the silicone rubber. The thixotropic foam silicone rubber disclosed by the invention is low in cost and good in thixotropism; a preparation method of the thixotropic foam silicone rubber is simple in process, wide in application field and simple and convenient in construction.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to the field of room temperature vulcanized foamed silicone rubber, and more particularly to a thixotropic foamed silicone rubber and a preparation method thereof. Background technique [0002] Room temperature vulcanization (RTV) foam silicone rubber generally consists of two or more components. At room temperature, the components are evenly mixed, and can be quickly vulcanized into a foamy or spongy elastomer. RTV foam silicone rubber has the characteristics of low density, small dielectric constant, heat insulation, and good mechanical properties of absorption. It is also non-toxic, odorless, soft, elastic, corrosion-resistant, and physiologically inert. It can be used as high-performance materials such as insulation, sealing, heat insulation, and shock absorption. It is widely used in the fields of transportation, aerospace, petrochemical, and electronic industries, especially ...

Claims

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Application Information

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IPC IPC(8): C08L83/06C08L83/05C08L83/07C08K7/08C08K7/00C08K3/26C08K3/36C08K3/34C08J9/00
Inventor 王天强刘旭周静李世昌
Owner CHENGDU GUIBAO SCI & TECH
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