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Silicone rubber heat-resistant additive, high-temperature-resistant transparent silicone rubber and preparation method thereof

A technology of heat-resistant additives and silicone rubber, which is applied in the field of silicone rubber heat-resistant additives, and can solve the problems of reduced transparency and impact

Active Publication Date: 2016-08-10
上海庸捷新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the temperature resistance of silicone rubber, it is more effective to add iron oxide, cerium oxide, titanium oxide and other metal oxides, but a large number of additives can improve the temperature resistance of silicone rubber while reducing its transparency. It affects the use in fields that require material temperature resistance and transparency, such as seals, molds, and coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Preparation of heat-resistant additives

[0035] 1) Add 695.6 g of tris-(trimethylsilyl) phosphate and 200 g of copper acetate into the reaction vessel.

[0036] 2) Introduce nitrogen protection, start stirring, start heating, control the reaction temperature at 120~130°C, react for 6 hours, and cool down.

[0037] 3) Distill the above-mentioned reactant under reduced pressure for 3 hours under the condition of vacuum degree of 5~6mmHg, then stop the reaction.

[0038] 4) Take 200g of the product obtained above, 120g of methylphenyl silicone rubber, 30g of alkoxy-terminated polysiloxane, 24g of hydrogen-containing silicone oil, and 60g of fumed silica, and banbury in a vacuum mixer for 3 hours. Obtain silicone rubber heat-resistant additives.

[0039] 2. Preparation of high temperature resistant transparent silicone rubber

[0040] 1) Mix 500g of methylphenyl silicone rubber, 175g of silanized fumed silica, 100g of methyl MQ resin, 25g of heat-resistant additive, ...

Embodiment 2

[0052] 1. Preparation of heat-resistant additives

[0053] 1) Add 695.6 g of tris-(trimethylsilyl) phosphate and 200 g of copper acetate into the reaction vessel.

[0054] 2) Introduce nitrogen protection, start stirring, start heating, control the reaction temperature at 120~130°C, react for 6 hours, and cool down.

[0055] 3) Distill the above reactants under reduced pressure for 4 hours under the condition of vacuum degree 5~6mmHg, then stop the reaction.

[0056] 4) Take 200g of the product obtained above, 110g of methyl vinyl silicone rubber, 30g of alkoxy-terminated polysiloxane, 20g of hydrogen-containing silicone oil, and 50g of fumed silica, and banbury in a vacuum mixer for 4 hours. Obtain silicone rubber heat-resistant additives.

[0057] 2. Preparation of high temperature resistant transparent silicone rubber

[0058] 1) Mix 500g of methyl vinyl silicone rubber, 190g of silanized fumed silica, 110g of vinyl MQ resin, 30g of heat-resistant additive, and 5g of di(...

Embodiment 3

[0070] 1. Preparation of heat-resistant additives

[0071]1) Add 728.5 g of tris-(trimethylsilyl) phosphate and 200 g of copper acetate into the reaction vessel.

[0072] 2) Introduce nitrogen protection, start stirring, start heating, control the reaction temperature at 130~140°C, react for 4 hours, and cool down.

[0073] 3) Distill the above reactants under reduced pressure for 4 hours under the condition of vacuum degree 5~6mmHg, then stop the reaction.

[0074] 4) Take 200g of the product obtained above, 120g of methylphenyl silicone rubber, 30g of alkoxy-terminated polysiloxane, 30g of hydrogen-containing silicone oil, and 50g of fumed silica, and banbury in a vacuum mixer for 4 hours. Obtain silicone rubber heat-resistant additives.

[0075] 2. Preparation of high temperature resistant transparent silicone rubber

[0076] 1) Mix 500g of methylphenyl silicone rubber, 210g of silanized fumed silica, 90g of methyl MQ resin, 40g of heat-resistant additive, and 18g of ben...

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PUM

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Abstract

The invention relates to a silicone rubber heat-resistant additive, high-temperature-resistant transparent silicone rubber and a preparation method of the additive and the rubber. Tri-(trimethylsilyl) phosphate, tri-(trimethylsilyl) boric acid ester and the like react with copper acetate, so that the silicone rubber heat-resistant additive is prepared; a rubber compound material which has high temperature resistance and transparency is prepared by using the compounded additive, and can be applicable to a mold, a sealing piece, a coating layer and the like which have requirements for temperature resistance and transparency. The maximum service temperature of the high-temperature-resistant transparent silicone rubber is 350 DEG C, the tensile strength is larger than 3.0 MPa, the elongation rate at break is larger than 210%, and the transmittance is larger than 85%.

Description

[technical field] [0001] The invention relates to a silicone rubber heat-resistant additive, silicone rubber and a preparation method thereof, in particular to a heat-resistant additive capable of increasing the high-temperature resistance of silicone rubber, a transparent silicone rubber containing the heat-resistant additive and a preparation method thereof. [Background technique] [0002] The heat-resistant temperature of silicone rubber in the air is generally around 230°C, and when it exceeds 250°C, the silicone rubber will quickly become brittle and crack. In order to improve the temperature resistance of silicone rubber, it is more effective to add iron oxide, cerium oxide, titanium oxide and other metal oxides, but a large number of additives can improve the temperature resistance of silicone rubber while reducing its transparency. It affects the use in fields that require material temperature resistance and transparency, such as seals, molds, and coatings. [0003]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08L83/05C08K13/02C08K5/5419C08K3/36
Inventor 黄新武罗洪坚刘旭军章基凯
Owner 上海庸捷新材料科技有限公司