Styrene-butadiene asbestos heat-resisting composite rubber and preparation method thereof

A technology of compounding rubber and styrene-butadiene asbestos is applied in the field of thermal protection materials for rocket engines, which can solve the problems of low tensile strength and elongation at break, and cannot meet product performance requirements, and achieve excellent thermal insulation performance. , The effect of slow vulcanization and flat vulcanization curve

Active Publication Date: 2012-10-03
航天科工火箭技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ordinary composite rubber materials used in the existing heat shields have low tensile strengt

Method used

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  • Styrene-butadiene asbestos heat-resisting composite rubber and preparation method thereof
  • Styrene-butadiene asbestos heat-resisting composite rubber and preparation method thereof
  • Styrene-butadiene asbestos heat-resisting composite rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A styrene-butadiene asbestos heat-resistant composite rubber, the main material contained styrene-butadiene rubber has a mass of 5kg, and the mass ratio of other raw materials is calculated as follows:

[0024]

[0025] The preparation method of preparing the above-mentioned materials into styrene-butadiene asbestos heat-resistant composite rubber comprises the following steps in turn:

[0026] 1) Plasticizing styrene-butadiene rubber: pass the broken styrene-butadiene rubber on the open mill for 4-6 times with a small roll distance of 0.5-1.0mm, and then add 2-mercaptobenzothiazole and Dibenzothiazole disulfide, after each stage of feeding, pass through a triangular bag, and control the temperature of the roller at 30~40°C;

[0027] 2) Mix dibutyl phthalate (DEP) and chrysotile fiber evenly to make it fully saturated with chrysotile fiber to make a pre-mixture of chrysotile fiber; adjust the roller distance of the mill to 0.5~1.0mm again, Add active agent zinc oxid...

Embodiment 2

[0029] A styrene-butadiene asbestos heat-resistant composite rubber, the main material contained styrene-butadiene rubber has a mass of 5kg, and the mass ratio of other raw materials is calculated as follows:

[0030]

[0031] The preparation method of preparing the above materials into styrene-butadiene asbestos heat-resistant composite rubber is the same as that in Example 1.

Embodiment 3

[0033] A kind of styrene-butadiene asbestos heat-resistant composite rubber, the contained main material styrene-butadiene rubber quality is 5kg, other raw material ratio quality except the following items, other are identical with embodiment 1:

[0034]

[0035] The preparation method of preparing the above materials into styrene-butadiene asbestos heat-resistant composite rubber is the same as that in Example 1.

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Abstract

The invention discloses styrene-butadiene asbestos heat-resisting composite rubber and a preparation method thereof. The styrene-butadiene asbestos heat-resisting composite rubber is prepared by styrene-butadiene rubber, chrysotile fiber and compounding agent as raw materials, wherein when the styrene-butadiene rubber is computed according to the mass m, the chrysotile fiber is 25-32%m; and the compounding agent comprises 4-6%m of zinc oxide, 1.8-2.2%m of stearic acid, 16-20%m of dibutyl phthalate, 1.8-2.2%m of N-phenyl-alpha-naphthylamine, 15-20m% of fumed silica, 0.6-0.8%m of 2- mercaptobenzothiazole, 2.5-3.5%m of dibenzothiazyl disulfide and 1.9-2.1%m of sulphur. The styrene-butadiene asbestos heat-releasing compound rubber can be obtained after plastifying, mixing and the like. The rubber has excellent aging resistance, ablation resistance and mechanical property; meanwhile, the preparation method is simple in operation so as to be suitable for mass production.

Description

technical field [0001] The invention belongs to the technical field of thermal protection materials for rocket engines, and specifically refers to a styrene-butadiene asbestos heat-resistant composite rubber and a preparation method thereof. Background technique [0002] The flexible nozzle is a kind of oscillating nozzle that implements the swing of the nozzle of the rocket engine by means of a flexible joint to achieve the purpose of thrust direction control. The flexible joint is bonded together alternately by several concentric ring-shaped elastic parts and reinforcing parts. The elastic part of the flexible joint is made of rubber material, and the reinforcing part of the flexible joint is made of metal material with better thermal conductivity. Generally, rubber materials can only work in the temperature range of 10~30°C, but when the solid rocket motor is working, the gas temperature exceeds 3000°C, which will increase the temperature of the metal reinforcement, whic...

Claims

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Application Information

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IPC IPC(8): C08L9/06C08K13/04C08K7/12C08K3/22C08K5/09C08K5/12C08K5/18C08K3/36C08K5/47C08K3/06
Inventor 朱兴涛晏述亮汪力凤万德芬
Owner 航天科工火箭技术有限公司
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