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Addition-type heat-resistant silicon rubber and preparation method thereof

A silicone rubber and addition molding technology is applied in the field of engineering materials, which can solve the problems of not meeting the heat resistance requirements of silicone rubber and the heat resistance requirements, and achieve the effect of simple and fast production process and high production efficiency.

Inactive Publication Date: 2015-01-21
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent CN102276990A discloses a method for preparing heat-resistant and acid-resistant silicone rubber. The heat-resistant temperature of silicone rubber products prepared by this method can reach 280°C, which cannot meet the heat-resistant requirements of silicone rubber under special conditions; Chinese patent CN102643553A discloses a A high-temperature-resistant silicone rubber additive and method, the heat-resistant additive prepared by the method can make the heat-resistant temperature of silicone rubber reach 300°C, and cannot meet the heat-resistant requirements of silicone rubber under special conditions; Chinese patent CN101899214A discloses a silicone rubber Heat-resistant additive and method, the heat-resistant additive prepared by this method can make the heat-resistant temperature of silicone rubber reach 320°C, but still cannot meet the heat-resistant requirements of silicone rubber under special conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh 100 parts of methylphenylvinyl silicone oil (4 wt% vinyl content), 3 parts of chloroplatinic acid-tetramethyldivinyldisiloxane complex and stir in a high-speed disperser for 15 minutes; add silane in sequence Auxiliary filler and heat-resistant additive for surface treatment of coupling agent 3-aminopropyltriethoxysilane: 240 parts of Al with an average particle size of 6 μm 2 o 3 , 120 parts of ZnO with an average particle size of 1 μm, 40 parts of AlN with an average particle size of 3 μm, and 1.6 parts of nano-CeO 2 , 1.6 parts of nano-Fe 2 o 3 and 0.8 parts nano-SnO 2 , Continue to stir for 30 minutes after the feeding is completed to obtain component A. Weigh 100 parts of methylphenyl vinyl silicone oil (vinyl content: 4wt%), 2 parts of methylphenyl hydrogen-containing silicone oil (hydrogen content: 1.0wt%), and 0.12 parts of diallyl maleate at high speed Stir in the disperser for 15 minutes; add silane coupling agent 3-aminopropyltriethoxysilane surfac...

Embodiment 2

[0033] Weigh 100 parts of methylphenylvinyl silicone oil (4 wt% vinyl content), 3 parts of chloroplatinic acid-tetramethyldivinyldisiloxane complex and stir in a high-speed disperser for 15 minutes; add silane in sequence Auxiliary filler and heat-resistant additive for surface treatment of coupling agent n-octyltriethoxysilane: 270 parts of Al with an average particle size of 6 μm 2 o 3 , 135 parts of ZnO with an average particle size of 1 μm, 45 parts of AlN with an average particle size of 3 μm, and 1.6 parts of nano-CeO 2 , 1.6 parts of nano-Fe 2 o 3 and 0.8 parts nano-SnO 2 , Continue to stir for 30 minutes after the feeding is completed to obtain component A. Weigh 100 parts of methylphenyl vinyl silicone oil (vinyl content is 4wt%), 2 parts of methylphenyl hydrogen-containing silicone oil (hydrogen content is 1.0wt%), and 0.12 parts of diethyl fumarate in a high-speed dispersion Stir in the machine for 15 minutes; add silane coupling agent n-octyltriethoxysilan...

Embodiment 3

[0035] Weigh 100 parts of methylphenylvinyl silicone oil (4 wt% vinyl content), 3 parts of chloroplatinic acid-tetramethyldivinyldisiloxane complex and stir in a high-speed disperser for 15 minutes; add silane in sequence Auxiliary filler and heat-resistant additive for surface treatment of coupling agent dodecyltrimethoxysilane: 300 parts of Al with an average particle size of 6 μm 2 o 3 , 150 parts of ZnO with an average particle size of 1 μm, 50 parts of AlN with an average particle size of 3 μm, and 1.6 parts of nano-CeO 2 , 1.6 parts of nano-Fe 2 o 3and 0.8 parts nano-SnO 2 , Continue to stir for 30 minutes after the feeding is completed to obtain component A. Weigh 100 parts of methylphenyl vinyl silicone oil (vinyl content is 4wt%), 2 parts of methylphenyl hydrogen-containing silicone oil (hydrogen content is 1.0wt%), 0.12 parts of 3-methyl-1-yne- Stir the 3-alcohol in a high-speed disperser for 15 minutes; sequentially add the silane coupling agent dodecyltrimetho...

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Abstract

The invention discloses addition-type heat-resistant silicon rubber and a preparation method thereof. The heat-resistant silicon rubber comprises a component A and a component B, wherein the component A is prepared from the following ingredients in parts by weight: 100 parts of methyl phenyl vinyl silicone oil, 2-4 parts of catalyst, 4-12 parts of heat-resistant additive processed by a silane coupling agent, and 400-500 parts of auxiliary packing processed by the silane coupling agent; the component B is prepared from the following ingredients in parts by weight: 100 parts of methyl phenyl vinyl silicone oil, 1.8-2.5 parts of cross-linkingagent, 0.1-0.15 parts of inhibitor, 4-12 parts of heat-resistant additive processed by the silane coupling agent, and 400-500 parts of auxiliary packing processed by the silane coupling agent; and the components A and B are evenly mixed according to the equal mass ratio, defoamed in vacuum and cured to prepare the addition-type heat-resistant silicon rubber. The heat-resisting temperature of the addition-type heat-resistant silicon rubber disclosed by the invention can achieve 460 DEG C; and the heat-resisting requirements of the fields such as aeronautics and astronautics, ignition cable protecting bushes of automobiles, and high-temperature sealing elements on the silicon rubber can be met.

Description

technical field [0001] The invention relates to the field of engineering materials, in particular to the technical field of heat-resistant silicone rubber, in particular to an addition-type heat-resistant silicone rubber and a preparation method thereof. Background technique [0002] Silicone rubber is a special rubber with excellent performance. It has excellent heat resistance, insulation, cold resistance and dielectric properties, so it is widely used. Ordinary silicone rubber has a heat resistance between 200 and 300°C. With the development of science and technology, under certain conditions, higher requirements are placed on the heat resistance of silicone rubber, especially with the development of aerospace technology, further improving the heat resistance of silicone rubber has great significance. [0003] Chinese patent CN102276990A discloses a method for preparing heat-resistant and acid-resistant silicone rubber. The heat-resistant temperature of silicone rubber ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08K13/06C08K9/06C08K3/22C08K3/28
Inventor 周正发宋远周徐卫兵任凤梅马海红
Owner HEFEI UNIV OF TECH
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