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Silicone rubber/unsaturated carbon chain rubber compatilizer based on hydrosilylation and preparing method and application thereof

A hydrosilylation reaction and unsaturated technology, which is applied in the field of rubber additives, can solve the problems of sacrificial system damping, high hardness of blended rubber, compatibilizer consumption, etc., and achieve good compatibilization effect, low raw material cost, and improved Effect of Tensile Strength and Tear Strength

Active Publication Date: 2017-03-15
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the compatibilizers used in this patent document all consume a certain amount of unsaturated bonds, which requires ethylene-propylene rubber and silicone rubber to have a higher vinyl content, which will lead to a high hardness of the blend rubber, making the combination The elasticity of the system is reduced, and the performance of the system such as damping will be sacrificed

Method used

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  • Silicone rubber/unsaturated carbon chain rubber compatilizer based on hydrosilylation and preparing method and application thereof
  • Silicone rubber/unsaturated carbon chain rubber compatilizer based on hydrosilylation and preparing method and application thereof
  • Silicone rubber/unsaturated carbon chain rubber compatilizer based on hydrosilylation and preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] (1) Preparation of hydrogen-containing silicone oil

[0059] 30g D 4 , 48g D 4 H Put into the polymerization reactor for dehydration, the dehydration conditions are -0.01~-0.02MPa, 40~80°C, 2h, dry nitrogen and ventilate, then raise the temperature to the polymerization temperature of 80~120°C, add hexamethyldisiloxane end-capping agent, Potassium hydroxide catalyst, normal pressure reaction for 24 hours, after the polymerization, the temperature was raised to 150°C, and the small molecule low boiling substances in the material were removed at 133-1330Pa, and the time was 4 hours to obtain hydrogen-containing silicone oil, the molecular weight of which was determined by hexamethyl di The amount of siloxane end-capping agent and potassium hydroxide catalyst is controlled, the number average molecular weight is about 7000, and the molar content of Si-H is about 66%.

[0060] The structural formula of the obtained hydrogen-containing silicone oil is as follows:

[0061...

Embodiment 2

[0070] (1) Preparation of hydrogen-containing silicone oil

[0071] 30g D 4 , 48g D 4 H Put into the polymerization reactor for dehydration, the dehydration conditions are -0.01~-0.02MPa, 40~80°C, 2h, dry nitrogen and ventilate, then raise the temperature to the polymerization temperature of 80~120°C, add hexamethyldisiloxane end-capping agent, Tetramethylammonium hydroxide catalyst, reaction at normal pressure for 24 hours, after polymerization, raise the temperature to 150°C, and remove small molecular low boiling substances in the material at 133-1330Pa, and the time is 4 hours to obtain hydrogen-containing silicone oil, whose molecular weight passes six The amount of methyldisiloxane end-capping agent and tetramethylammonium hydroxide catalyst is controlled, the number average molecular weight is about 5000, and the Si-H molar content is about 66%.

[0072] The structural formula of the obtained hydrogen-containing silicone oil is as follows:

[0073]

[0074] (2) P...

Embodiment 3

[0082] (1) Preparation of hydrogen-containing silicone oil

[0083] 30g D 4 , 24g D 4 H Put into the polymerization reactor for dehydration, the dehydration conditions are -0.01~-0.02MPa, 40~80°C, 2h, dry nitrogen and ventilate, then raise the temperature to the polymerization temperature of 80~120°C, add hexamethyldisiloxane end-capping agent, Concentrated sulfuric acid catalyst, react at normal pressure for 24 hours, after the polymerization, raise the temperature to 150°C, remove small molecular low boiling substances in the material at 133-1330Pa, and get hydrogen-containing silicone oil for 4 hours, the molecular weight of which is passed by hexamethyldisilica The amount of oxane end-capping agent and concentrated sulfuric acid catalyst is controlled, the number average molecular weight is about 5000, and the Si-H molar content is about 50%.

[0084] The structural formula of the obtained hydrogen-containing silicone oil is as follows:

[0085]

[0086] (2) Prepara...

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Abstract

The invention relates to a silicone rubber / unsaturated carbon chain rubber compatilizer based on hydrosilylation and a preparing method and application thereof. The compatilizer has a structure shown in a formula (I), wherein in the formula (I), R is alkyl or hydroxyl, M is unsaturated hydroxyl. 10<=x+l+m<=3000, x / (l+m)>0; 0< l / (l+m)<=1, 2<=n<=30, and x, y, l, m and n are all integers. The invention further provides a preparing method and application of the compatilizer. The silicone rubber / unsaturated carbon chain rubber compatilizer based on the hydrosilylation is good in compatibility effect, can significantly improve tensile strength and tear strength of a silicone rubber / unsaturated carbon chain rubber blending system, tensile strength can reach up to 3.81MPa and tear strength can reach up to 2.45 KN / m. The formula (I) is defined in the specification.

Description

technical field [0001] The invention relates to a silicone rubber / unsaturated carbon chain rubber compatibilizer based on hydrosilylation reaction and its preparation method and application, belonging to the technical field of rubber additives. Background technique [0002] At present, unsaturated carbon chain rubber including butyl rubber, natural rubber, and nitrile rubber is the most widely used type of rubber. Taking butyl rubber (IIR) as an example, because the methyl group on the molecular chain is very dense, forming a worm-like structure, it has a high loss factor, and because there is a secondary transition near the glass transition temperature of butyl rubber , resulting in high and wide internal friction peaks, so butyl rubber has excellent shock absorption effect, and the damping materials prepared with it have been widely used in aerospace, automobile manufacturing and other fields. However, the temperature range in which butyl rubber plays a damping role is na...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/38C08G77/16C08G77/12C08L83/04C08L83/07C08L23/22C08L7/00C08K13/02C08K3/36C08K5/09C08K3/06C08K3/22
CPCC08G77/12C08G77/16C08G77/38C08L83/04C08L2205/025C08L2205/03C08L2205/08C08L23/22C08K13/02C08K3/36C08K5/09C08K3/06C08K2003/2296C08L7/00C08L83/06
Inventor 张洁李旭光
Owner SHANDONG UNIV
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