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Fire-proof and heat-insulating silicone rubber and preparation method thereof

A technology of silicone rubber and phenyl silicone rubber, which is applied in the field of fire-proof and heat-insulating silicone rubber and its preparation

Active Publication Date: 2018-02-16
NORTHWEST RUBBER & PLASTIC RES & DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Compared with traditional nitrile rubber, neoprene, and EPDM, silicone rubber ablation-resistant materials have obvious advantages in heat resistance, ablation resistance, and smoke generation; the working time of supersonic missile ramjet More than 300S, traditional thermal insulation materials are difficult to meet the environmental requirements of its working conditions, and silicone rubber ablation-resistant materials can solve the problem of long-term thermal protection of the afterburner of ramjet engines

Method used

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  • Fire-proof and heat-insulating silicone rubber and preparation method thereof
  • Fire-proof and heat-insulating silicone rubber and preparation method thereof
  • Fire-proof and heat-insulating silicone rubber and preparation method thereof

Examples

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Effect test

preparation example Construction

[0064] A preparation method of fireproof and heat-insulating silicone rubber, comprising the following steps:

[0065] Step 1: Use a double-roll mill to adjust the roller distance to 3-5mm, and add the base material at a certain roller temperature;

[0066] Step 2: Add reinforcing agent, other additives, flame retardant and high-temperature-resistant functional fillers to the double-roller mill in sequence, mix and heat-treat after mixing;

[0067] Step 3: After the heat treatment is completed, after the temperature drops to room temperature, add other additives in the double-roll mill, and thin the film through multiple times;

[0068] Step 4: After the lower piece is parked for 24 hours, vulcanize it with a flat vulcanizing machine to make a fire-proof and heat-insulating silicone rubber sample.

[0069] The substrate in step 1 is 100 parts of phenyl silicone rubber;

[0070] The reinforcing agent in step 2 is 30 parts of meteorological silica; Described other additives ar...

Embodiment

[0077]Using a double-roll mill, adjust the roll distance to 3-5 mm, add 100 grams of phenyl silicone rubber at a temperature of 0-50 ° C, then add 30 grams of meteorological white carbon black, diphenylsilanediol 4 grams, 10 grams of melamine polyphosphate, 30 grams of aluminum hydroxide, 12 grams of silicon carbide, and 10 grams of boron nitride, mixed for 20 minutes and then heat treated at 200°C for 1 hour. After the heat treatment is completed, wait until the temperature drops to room temperature , add 1 gram of vulcanizing agent dicumyl peroxide to the open mill, thin pass 3 times and take off the tablet; after parking for 24 hours, vulcanize with a flat vulcanizer at 10MPa, 160°C for 10 minutes to make a test sample.

[0078] The fire-proof test of the fire-proof and heat-insulating silicone rubber sample prepared by the above method is as follows:

[0079] 1. 3000K ablation test

[0080] ⑴. Test condition: 3000K×20s

[0081] ⑵. Test method: GJB323A-96

[0082] ⑶. ...

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Abstract

The invention relates to a fire-proof and heat-insulating silicone rubber and a preparation method thereof. The components of the fire-proof and heat-insulating silicone rubber include: a base material, a high-temperature-resistant functional filler, a flame retardant, a reinforcing agent and other auxiliary agents; the mass of each component The percentage range is: base material 45%-55%; high temperature resistant functional filler 10%-15%; flame retardant 15%-25%; reinforcing agent 10%-20%; other additives 1%-5%; The sum of the percentages of the components is 100%. The preparation method of the fire-proof and heat-insulating silicone rubber includes four steps. The invention provides a silicone rubber material with excellent fire-proof and heat-insulating properties prepared by optimizing the formula and cooperating with high-temperature-resistant functional materials, flame-retardant materials, reinforcing materials and other additives; the fire-proof and heat-insulating silicon rubber material prepared by the invention Rubber is especially suitable for the fire and heat insulation performance requirements of rocket engines and the potential conditions of aircraft fire zone conditions.

Description

technical field [0001] The invention belongs to the field of silicone rubber composite materials, and in particular relates to a fire-proof and heat-insulating silicone rubber and a preparation method thereof. Background technique [0002] Silicone rubber is a polymer elastic material with both inorganic and organic molecular chains. Its molecular main chain is composed of silicon atoms and oxygen atoms alternately (-Si-O-Si-), and the bond energy of silicon-oxygen bonds is as high as 370kj. / mol, has high thermal stability, and can reach 300°C in a short time. Introduce methyl, vinyl and diphenylsilane chain links into the main chain of the silicone rubber molecule, that is, phenyl silicone rubber. In addition to the high temperature and aging resistance of silicone rubber, it also has radiation resistance and ablation resistance. performance. [0003] Compared with traditional nitrile rubber, neoprene, and EPDM, silicone rubber ablation-resistant materials have obvious a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08K13/02C08K3/34C08K3/38C08K3/22C08K5/3492C08K3/36C08K5/14B29C35/02
Inventor 李林辉张敏范旭东
Owner NORTHWEST RUBBER & PLASTIC RES & DESIGN INST CO LTD