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High-temperature resistant and erosion resistant rubber composition and preparation method thereof

A rubber composition and anti-ablation technology, applied in the field of polymer processing, can solve the problems of material loss of elasticity and flexibility, loss of sealing, etc., and achieve simple preparation and molding process, good elasticity and mechanical properties, and wide applicability Effect

Inactive Publication Date: 2012-04-25
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of these patents focus on the flame retardancy and flame retardancy of silicone rubber, and rarely involve the ablation resistance of silicone rubber materials that can withstand high-temperature and high-speed airflow, or the material has certain ablation resistance, but it can only be used as a coating It is difficult to be used as an independent component. More importantly, in some existing solutions, the thicker part or the whole of the silicone rubber forms an inorganic layer after ablation. Although it shows good heat resistance performance, the material is lost. Loss of elasticity and flexibility, almost lost the function of sealing, especially dynamic sealing

Method used

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  • High-temperature resistant and erosion resistant rubber composition and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0036] Example 1 : Add 100 parts of methyl vinyl silicone rubber, gas phase SiO 2 30 parts, 0.5 parts of platinum black, 10 parts of copper oxide, 5 parts of aluminum oxide, 15 parts of boron nitride ceramic fiber, 50 parts of wollastonite, and knead until uniformly mixed; after natural aging at room temperature for 8 hours, put them in a double-roll mill Continue mixing and add 5 parts of α-type silicon carbide whiskers and 1.5 parts of bis(2,4-dichlorobenzoyl peroxide) successively. After 20 minutes of kneading, the sheet is produced, and vulcanized in a flat vulcanizing machine at 200°C for 25 minutes to form .

Embodiment 2

[0037] Example 2 : 50 parts of methyl vinyl silicone rubber, 50 parts of methyl phenyl vinyl silicone rubber, precipitation SiO 2 20 parts, 0.8 parts of chloroplatinic acid, 5 parts of magnesium oxide, 20 parts of iron oxide, silicon nitride (Si 3 N 4) 5 parts of ceramic fiber and 80 parts of mica were kneaded until evenly mixed; after natural aging at room temperature for 8 hours, the kneading was continued in a double-roll mill and 15 parts of β-type silicon carbide whiskers, 0.8 dicumyl peroxide After 30 minutes of kneading, the sheets are released, and they are vulcanized in a flat vulcanizing machine at 200°C for 30 minutes.

Embodiment 3

[0038] Example 3: Add 100 parts of dimethyl silicone rubber, gas phase SiO 2 30 parts, 0.05 parts of chloroplatinic acid organosiloxane complex, 15 parts of zinc oxide, 25 parts of zirconia, 25 parts of SiBN ceramic fiber, 30 parts of quartz powder, 30 parts of diatomaceous earth, knead until uniformly mixed; After aging for 8 hours, continue mixing in a double-roller mill and add 1 part of silicon carbide whiskers and 2 parts of di-tert-butane peroxide in sequence. After 30 minutes of kneading, the sheet is released, and vulcanized in a flat vulcanizer at 180 ° C for 30 Shaped in minutes.

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PUM

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Abstract

The invention relates to a high-temperature resistant and erosion resistant rubber composition and a preparation method thereof. The high-temperature resistant and erosion resistant rubber composition is prepared by using the following components: 100 parts of silicon rubber, 5-30 parts of silicon dioxide, 5-50 parts of metallic oxide, 1-25 parts of nitride ceramic fibre, 0.5-20 parts of silicon carbide whisker, 20-100 parts of heat resistant packing, 0.01-0.5 parts of catalyst and 0-4 parts of cross-linking agent through double-roll milling, hot-pressing, vulcanizing and molding.

Description

technical field [0001] The invention relates to a high-temperature-resistant and anti-ablation rubber composition and a preparation method thereof, belonging to the field of polymer processing. Background technique [0002] Silicone rubber has excellent performance in properties such as high and low temperature resistance, weather resistance, insulation and physiological inertia. It can be formed into various complex shapes through molding and injection molding. It has a wide range of applications in medical and other fields. However, pure silicone rubber generally does not have flame retardant properties, and it will continue to burn when it is away from the fire. At the same time, its ablation resistance is also poor. Temperature conditions require materials to have certain physical and mechanical properties, such as good flexibility, elastic sealing performance, and mechanical strength required as an independent component, even in more extreme cases It is required that ...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/04C08K13/04C08K7/10C08K7/04C08K3/36C08K3/22C08K3/34C08K3/24
Inventor 邹华维梁梅罗文洲陈洋刘昊鹏刘鹏波
Owner SICHUAN UNIV
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