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A kind of silicone rubber and its preparation method and application

A silicone rubber and silane-based technology, which is applied in the field of silicone rubber and its preparation, can solve the problems of high strength, high temperature, low thermal weight loss, performance that cannot meet the requirements, and physical property decline, and achieve low thermal weight loss, excellent mechanical properties, and fast curing. Effect

Active Publication Date: 2022-05-10
兆舜科技(广东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the existing one-component adhesive sealing silicone rubber can no longer meet the needs, especially in terms of high strength, high temperature and low thermal weight loss, etc.
There are also some problems in the single-component adhesive sealing silicone rubber widely used at present: (1) its physical properties drop by more than 50% after long-term use at high temperatures, resulting in its performance not meeting the requirements or frequent replacement
(2) The thermal weight loss is too high for a long time at high temperature, exceeding 3%, resulting in insufficient weight in the later stage

Method used

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  • A kind of silicone rubber and its preparation method and application
  • A kind of silicone rubber and its preparation method and application
  • A kind of silicone rubber and its preparation method and application

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Experimental program
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Embodiment 1

[0065] This embodiment provides a kind of silicone rubber, the preparation raw material of described silicone rubber comprises the following components by weight percentage: base material 55%, α, ω-dihydroxypolydimethylsiloxane (viscosity is 20000cps) 30%, methyl tributyl ketoxime silane 4%, vinyl tributyl ketoxime silane 1%, hexamethyldisilazane 0.2%, (3-methacryloyloxypropyl) trimethoxysilane 0.2%, γ-aminopropyltriethoxysilane 1%, dibutyltin dilaurate 0.2%, red iron oxide color paste 2% and fumed silica (particle size 50nm) 6.4%.

[0066] The raw materials for the preparation of the above-mentioned base material include the following components by weight percentage: α, ω-dihydroxy polydimethylsiloxane (viscosity is 20000cps) 45%, untreated alumina (particle size is 30 μm) 15% %, titanium dioxide (particle diameter is 50nm) 22%, nano calcium carbonate (particle diameter is 100nm) 15% and fumed white carbon black (particle diameter is 50nm) 3% through stearic acid surface trea...

Embodiment 2

[0071] This embodiment provides a kind of silicone rubber, the preparation raw material of described silicone rubber comprises the following components by weight percentage: base material 40%, α, ω-dihydroxypolydimethylsiloxane (viscosity is 10000cps) 50%, methyl tributyl ketoxime silane 1%, vinyl tributyl ketoxime silane 1.5%, hexamethyldisilazane 0.5%, (3-glycidoxypropyl) trimethoxysilane 0.5 %, γ-aminopropyltrimethoxysilane 2%, dibutyltin dilaurate 1%, red iron oxide color paste 1%, and fumed white carbon black (particle size 80nm) 2.5%.

[0072] The raw materials for the preparation of the above-mentioned base material include the following components by weight percentage: α, ω-dihydroxy polydimethylsiloxane (viscosity is 10000cps) 40%, untreated alumina (particle size is 40 μm) 20% %, titanium dioxide (particle size is 40nm) 20%, nano calcium carbonate (particle size is 100nm) 10% and fumed white carbon black (particle size is 80nm) 10% through stearic acid surface treatm...

Embodiment 3

[0077] This embodiment provides a kind of silicone rubber, the preparation raw material of described silicone rubber comprises the following components by weight percentage: base material 60%, α, ω-dihydroxypolydimethylsiloxane (viscosity is 30000cps) 20%, methyl tributyl ketoxime silane 7%, vinyl tributyl ketoxime silane 0.3%, hexamethyldisilazane 0.1%, (3-glycidoxypropyl) trimethoxysilane 0.2 %, 0.3% of γ-aminopropyltrimethoxysilane, 0.1% of dibutyltin dilaurate, 2% of red iron oxide color paste and 10% of fumed white carbon black (particle size: 20nm).

[0078] The raw materials for the preparation of the above-mentioned base material include the following components by weight percentage: α, ω-dihydroxy polydimethylsiloxane (viscosity is 30000cps) 49%, untreated alumina (particle size is 30 μm) 10% %, titanium dioxide (particle size is 40nm) 20%, nano calcium carbonate (particle size is 100nm) 20% and fumed white carbon black (particle size is 80nm) 1% through stearic acid ...

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Abstract

The invention provides a silicone rubber and its preparation method and application. Based on the total weight of the raw materials for the preparation of silicone rubber as 100%, the raw materials for the preparation of the silicone rubber include the following components in terms of weight percentage: base material 40-70%, α,ω-dihydroxy polydimethylsiloxane 20-50% alkane, 1-10% composite crosslinking agent, 0.03-0.5% hexamethyldisilazane, 0.03-0.5% silane coupling agent, 0.3-2.0% tackifier and 0.05-1.0% catalyst, The composite crosslinking agent includes methyl tributylketoxime silane and vinyl tributylketoxime silane. The silicone rubber can be obtained by curing at room temperature, has fast curing, has suitable tensile strength, elongation at break and hardness, low thermal conductivity, low thermal weight loss and good adhesiveness.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a silicone rubber and its preparation method and application. 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. Ordinary silicone rubber is mainly composed of silicone chains containing methyl groups and a small amount of vinyl groups. It has good high temperature resistance and low temperature resistance, and can work for a long time in the temperature range between -55°C and 180°C. There are two types of silicone rubber, high temperature vulcanization and room temperature vulcanization. High-temperature vulcanized silicone rubber refers to the process of polysiloxane becoming elastomer through high-temperature vulcanization. It mainly uses high-molecular-weight polymethylvinylsiloxane as raw rubber...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J183/04C09J11/04C09J11/06
CPCC09J183/04C09J11/04C09J11/06C08K2201/003C08K2201/011C08K2003/2227C08K2003/265C08K2003/2241C08K13/06C08K9/04C08K3/26C08K3/22C08K3/36C08K5/5465C08K5/544C08K5/5425C08K5/5435
Inventor 翁祝强李江华刘金明王小双林旭锋
Owner 兆舜科技(广东)有限公司
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