Silicon rubber thermal insulation material and preparation method thereof

A thermal insulation material, silicone rubber technology, applied in the field of silicone rubber thermal insulation materials and its preparation, can solve the problems of low strength, limited ablation resistance and flame retardancy of pure silicone rubber, low cohesive energy between molecules, etc., to achieve elasticity Good, strong resistance to small molecule migration

Inactive Publication Date: 2019-01-15
芜湖市颂晖商贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of polymer is easy to decompose at high temperature, and its side chain is flammable, so the ablation resistance and flame retardancy of pure silicone rubber are limited; in addition, the cohesive energy between silicone rubber molecules is low, and the molecular chain is flexible, resulting in mechanical properties Unsatisfactory, manifested in low intensity, etc.

Method used

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  • Silicon rubber thermal insulation material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0023] This embodiment provides a silicone rubber thermal insulation material, which is prepared from the following raw materials: 50 parts of methyl vinyl silicone rubber, 50 parts of methyl vinyl phenyl silicone rubber, 25 parts of white carbon black, 8 parts of nano calcium carbonate parts, carbon fiber 12 parts, 2,5-dimethyl-2,5-bis-hexane 1.0 parts.

[0024] The preparation method of the silicone rubber thermal insulation material of the present embodiment comprises the following steps:

[0025] (1) Weighing methyl vinyl silicone rubber and methyl vinyl phenyl silicone rubber, adding them into a mixer and kneading to a transparent state to prepare a silicone rubber matrix;

[0026] (2) Take white carbon black and carbon fiber and add in the silicone rubber matrix that step (1) obtains, knead until mixing;

[0027] (3) take nano-calcium carbonate, add in the silicone rubber matrix that obtains in step (2), knead to mix;

[0028] (4) Weigh 2,5-dimethyl-2,5-bis-hexane, add...

Embodiment 2

[0031] This embodiment provides a silicone rubber thermal insulation material, which is prepared from the following raw materials: 40 parts of methyl vinyl silicone rubber, 60 parts of methyl vinyl phenyl silicone rubber, 20 parts of white carbon black, 15 parts of nanometer calcium carbonate 10 parts of carbon fiber, 1.5 parts of 2,5-dimethyl-2,5-bis-hexane.

[0032] The preparation method of the silicone rubber thermal insulation material of the present embodiment comprises the following steps:

[0033] (1) Weighing methyl vinyl silicone rubber and methyl vinyl phenyl silicone rubber, adding them into a mixer and kneading to a transparent state to prepare a silicone rubber matrix;

[0034] (2) Take white carbon black and carbon fiber and add in the silicone rubber matrix that step (1) obtains, knead until mixing;

[0035] (3) take nano-calcium carbonate, add in the silicone rubber matrix that obtains in step (2), knead to mix;

[0036] (4) Weigh 2,5-dimethyl-2,5-bis-hexane...

Embodiment 3

[0039] This embodiment provides a silicone rubber thermal insulation material, which is prepared from the following raw materials: 60 parts of methyl vinyl silicone rubber, 40 parts of methyl vinyl phenyl silicone rubber, 30 parts of white carbon black, 2 parts of nanometer calcium carbonate parts, carbon fiber 15 parts, 2,4-dimethyl 2,4-bishexane 0.5 parts.

[0040] The preparation method of the silicone rubber thermal insulation material of the present embodiment comprises the following steps:

[0041] (1) Weighing methyl vinyl silicone rubber and methyl vinyl phenyl silicone rubber, adding them into a mixer and kneading to a transparent state to prepare a silicone rubber matrix;

[0042] (2) Take white carbon black and carbon fiber and add in the silicone rubber matrix that step (1) obtains, knead until mixing;

[0043] (3) take nano-calcium carbonate, add in the silicone rubber matrix that obtains in step (2), knead to mix;

[0044] (4) Weigh 2,4-dimethyl 2,4-bis-hexane,...

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Abstract

The invention discloses a silicone rubber thermal insulation material and a preparation method thereof, and belongs to the technical field of thermal insulation materials, and the silicone rubber thermal insulation material is prepared from the following raw materials: 40-60 parts of methyl vinyl silicone rubber, 40-60 parts of methyl vinyl phenyl silicone rubber, 20 to 30 parts of white carbon black, 2 to 15 parts of nano calcium carbonate, 10 to 15 parts of carbon fiber, and 0.5 to 1.5 parts of a vulcanizing agent. The silicone rubber thermal insulation material can form a high melting pointceramic-like layer in the process of smelting erosion, and has the advantages of high temperature resistance, ablation resistance, good elasticity and strong resistance to migration of small molecules.

Description

technical field [0001] The invention relates to the technical field of thermal insulation materials, in particular to a silicone rubber thermal insulation material and a preparation method thereof. Background technique [0002] Silicone rubber heat insulation material is a heat insulation layer material that has been researched and applied more at home and abroad in recent years. It can form a high-melting point ceramic-like layer during the ablation process. It has good heat resistance and flame retardancy, good oxidation resistance, and small molecule resistance. With the advantages of strong migration ability and strong versatility, it is expected to replace EPDM rubber in the engine afterburning chamber, because the high-speed gas at thousands of degrees Celsius in the engine afterburning chamber poses a great threat to the structural integrity of the engine shell. Therefore, insulation materials must be used to protect the shell from preheating. [0003] Silicone rubbe...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08K9/06C08K3/26C08K7/06C08K3/36
CPCC08K2003/265C08K2201/004C08K2201/011C08L83/04C08L2201/08C08L2205/025C08K9/06C08K3/26C08K7/06C08K3/36
Inventor 汪琦郭元
Owner 芜湖市颂晖商贸有限公司
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