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High-damping high-temperature silicon sulfide rubber and preparation method and application thereof

A high-temperature vulcanization and high damping technology, which is applied in the field of polymer materials, can solve problems such as unsatisfactory, low glass transition temperature, and low damping coefficient, and achieve the effect of improving quality, simple method, and stable damping and vibration reduction performance

Inactive Publication Date: 2016-07-20
GUANGZHOU BAIYUN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The special silicon-oxygen bond structure makes high-temperature vulcanized silicone rubber have a lower glass transition temperature (-70 to -140°C), and its mechanical properties are relatively stable in a wide temperature range (-50°C to 150°C). The change is small, but its damping coefficient is low, which cannot meet the needs of automobiles, ships, rail transit locomotives and other fields that require high damping performance

Method used

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  • High-damping high-temperature silicon sulfide rubber and preparation method and application thereof
  • High-damping high-temperature silicon sulfide rubber and preparation method and application thereof
  • High-damping high-temperature silicon sulfide rubber and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 5 parts of methyl vinyl phenyl silicone rubber raw rubber (vinyl molar content: 0.21%, Phenyl molar content: 20%, average molecular weight: about 590,000), 5 parts of acrylic damping agent (ethylene-acrylic acid copolymer with a molar ratio of 80:20, average molecular weight: about 6000), 2 parts of mica, 40 parts of gas phase French silica (specific surface area: 300m 2 / g), 10 parts of α, ω-dihydroxy polydimethylsiloxane (average degree of polymerization: 6), fully kneaded in a kneader for 2 hours, and then kneaded at 170°C for 4 hours under normal pressure , and finally mixed at 170°C for 2 hours under the condition that the absolute pressure was not higher than 20KPa, and the compound rubber I without vulcanizing agent was obtained;

[0032] Cool the rubber compound Ⅰ to room temperature, add 0.5 parts of vulcanizing agent 2,4-dichlorobenzoyl peroxide to 100 parts of the Agent compound II;

[0033] Feed the mixed rubber II containing vulcanizing agent into th...

Embodiment 2

[0036] Add 30 parts of methyl vinyl phenyl silicone rubber raw rubber (vinyl molar content: 0.30%, Phenyl molar content: 5%, average molecular weight: 460,000), 0.5 parts of 4,4'-bis(α,α-dimethylbenzyl) diphenylamine, 1 part of wollastonite, 50 parts of precipitated silica (Specific surface area: 200m2 / g), 6 parts of diphenylsilanediol, mixed in a kneader for 4 hours (temperature: 180°C, pressure: normal pressure), and finally mixed at 180°C, absolute pressure not higher than 20KPa for 0.5 hours , to prepare compound III without vulcanizing agent.

[0037] Cool the rubber compound III to room temperature, add 2 parts of benzoyl peroxide to 100 parts of the rubber compound, and mix it on a two-roll mill for 5 times to obtain the rubber compound IV containing a vulcanizing agent;

[0038] Feed the mixed rubber IV containing vulcanizing agent into the filter machine to make a rubber compound strip with a diameter of 4 cm, then feed the mixed rubber strip containing vulcanizing ...

Embodiment 3

[0041] Add 20 parts of methyl vinyl phenyl silicone rubber raw rubber (vinyl molar content: 0.1%, Phenyl molar content: 30%, average molecular weight: 460,000), 1 part of 2,6-di-tert-butyl-4-methylphenol, 3 parts of graphite, 20 parts of fumed silica (specific surface area: 380m 2 / g), 25 parts of precipitated silica (specific surface area: 260m 2 / g), 12 parts of hexamethyldisilazane, fully kneaded in a kneader for 2 hours, then kneaded at 100°C for 4 hours under normal pressure, and finally at 100°C, the absolute pressure was not higher than 20KPa Down mixing for 2 hours, the mixed rubber V without vulcanizing agent was obtained;

[0042] Cool the rubber compound V to room temperature, add 1 part of 2,4-dichlorobenzoyl peroxide and 1 part of 2,5-dimethyl-2,5-di-tert-butyl peroxide to 100 parts of the rubber compound Hexane was oxidized, and Botong was mixed 5 times on a two-roll mill to obtain vulcanizing agent-containing rubber compound VI;

[0043] Feed the mixed rubber...

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Abstract

The invention relates to high-damping high-temperature silicon sulfide rubber and a preparation method and application thereof. The high-damping high-temperature silicon sulfide rubber is prepared from, by mass, 100 parts of a vulcanizing-agent-free mixed material and 0.5-3 parts of a vulcanizing agent. The vulcanizing-agent-free mixed material is prepared from, by mass, 100 parts of raw methyl vinyl silicone rubber, 5-30 parts of raw polymethylvinylphenylsiloxane rubber, 1-20 parts of a damping agent, 40-105 parts of filler and 1-12 parts of an anti-structuring agent. The damping coefficient of the high-damping high-temperature silicon sulfide rubber in the temperature range of 50-100 DEG C is larger than or equal to 0.2, stable damping and vibration-reducing performance can be kept in the wide temperature range, quality of prepared finished products is improved, and the high-damping high-temperature silicon sulfide rubber can be widely used in the wide-temperature-range fields such as automobiles, rail transit locomotives, ships, food and aerospace.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a high-damping high-temperature vulcanized silicone rubber and its preparation method and application. Background technique [0002] Vehicles, ships, rail locomotives and other vehicles will inevitably generate vibration during operation. These vibrations will not only cause fatigue damage to various components and physical impact damage between components, reduce the service life of the vehicle, but also generate vibration. Noise is transmitted to the interior of the compartment or cabin, reducing ride comfort. Therefore, the sealing strips used in automobiles, ships and rail transit locomotives not only need to have good fixing, waterproof, sound insulation, heat insulation and dustproof properties, but also must have excellent vibration damping performance to reduce the impact of vibration on various vehicles. Damage to components and impact on ride comfort. In add...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L33/08C08L23/08C08L25/14C08L83/06C08K13/06C08K9/06C08K3/36C08K5/14C08K13/02C08K3/34C08K3/04B29B7/00B29C35/02
CPCC08L83/04B29B7/002B29C35/02C08K2201/006C08K2201/014C08L2201/08C08L2205/02C08L2205/025C08L2205/035C08L23/0869C08L83/06C08K13/02C08K3/34C08K3/36C08K5/14C08K5/18C08K5/5419C08K5/13C08K3/04C08L33/08C08K13/06C08K9/06C08L25/14
Inventor 蒋坤王运利付子恩刘光华陈建军黄恒超
Owner GUANGZHOU BAIYUN CHEM IND
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