Silicone rubber foaming sealing material and preparation method thereof

A foamed sealing material and silicone rubber technology, applied in the field of silicone rubber materials, can solve the problems of compressive stress relaxation, compression permanent deformation, low mechanical properties, etc., and achieve the effects of less smoke and increased reactive cross-linking points.

Active Publication Date: 2022-03-18
ZHUZHOU TIMES NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to design and propose a silicone rubber foam sealing material and its preparation method to solve the problems of thin surface skin, low mechanical properties, compression set and compressive stress relaxation existing in the current silicone rubber foam sealing material. big problem

Method used

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  • Silicone rubber foaming sealing material and preparation method thereof
  • Silicone rubber foaming sealing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]A silicone rubber foam sealing material, mainly prepared from the following raw materials in parts by weight: methyl vinyl silicone rubber (vinyl content 0.06%, molecular weight 500,000, hardness 50 Shore A) 100g, structural formula ( 1) 4g of vinyl silicone oil (viscosity of 10,000mPa·s, vinyl content of 8.5%), vinyl MQ silicone resin (viscosity of 5000mPa·s, vinyl content of 2.4%) 3g, flame retardant filler 40g (cyanide Uric acid melamine salt 30g, aluminum hydroxide 10g), 5000ppm platinum flame retardant 0.8g, azobisisobutyronitrile 3.5g, composite vulcanizing agent 1.76g (including PMBP 0.8g, odorless DCP 0.8g, TAIC 0.16g).

[0038] The preparation method of the silicone rubber foam sealing material of the present embodiment may further comprise the steps:

[0039] (1) Methyl vinyl silicone rubber (vinyl content 0.06%, molecular weight 500,000, hardness 50 Shore A) 100g, vinyl silicone oil (viscosity 10,000 mPa·s, ethylene Base content is 8.5%) 4g, vinyl MQ silicone...

Embodiment 2

[0044] A silicone rubber foam sealing material, mainly prepared from the following raw materials in parts by weight: 100 g of methyl vinyl silicone rubber (vinyl content 0.05%, molecular weight 400,000, hardness 60 Shore A), structural formula ( 2) 4g of vinyl silicone oil (viscosity of 15,000mPa·s, vinyl content of 5%), vinyl MQ silicone resin (viscosity of 8000mPa·s, vinyl content of 2.1%) 3g, flame retardant filler aluminum hydroxide 60g, 5000ppm platinum flame retardant 1.0g, azobisisobutyronitrile 3g, composite vulcanizing agent 1.76g (including PMBP 1g, odorless DCP 0.4g, TAIC 0.08g).

[0045] A preparation method of silicone rubber foam sealing material, comprising the following steps:

[0046] (1) Methyl vinyl silicone rubber (vinyl content 0.05%, molecular weight 400,000, hardness 60 Shore A) 100g, vinyl silicone oil with structural formula (2) (viscosity 15,000 mPa·s, vinyl Content is 5%) 4g, vinyl MQ silicone resin (viscosity 8000mPa·s, vinyl content 2.1%) 3g, flam...

Embodiment 3

[0051] Replace 30 g of flame-retardant filler melamine cyanurate and 10 g of aluminum hydroxide with 60 g of flame-retardant filler melamine cyanurate and 30 g of aluminum hydroxide. The content and preparation method of other components are the same as in Example 1 to obtain sample 3.

[0052] The performance test results of sample 3 are shown in Table 1.

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Abstract

The invention relates to a silicone rubber foaming sealing material and a preparation method thereof. The silicone rubber foaming sealing material comprises 100 parts of silicone rubber, 1-8 parts of vinyl silicone oil, 1-6 parts of vinyl MQ silicone resin, 1-10 parts of a foaming agent, 1-5 parts of a composite vulcanizing agent and 20.5-102 parts of a composite flame retardant. The composite flame retardant is prepared from 20 to 100 parts of flame-retardant filler and 0.5 to 2 parts of platinum flame retardant; the invention also discloses a preparation method of the silicone rubber foaming sealing material. The silicone rubber sealing material prepared by the invention has the advantages of excellent flame retardant property, low compression set at high temperature, good compressive stress relaxation resistance and excellent long-time sealing protection performance.

Description

technical field [0001] The invention relates to the technical field of silicone rubber materials, in particular, the invention relates to a silicone rubber foam sealing material and a preparation method thereof. Background technique [0002] Silicone rubber foam material combines the characteristics of silicone rubber material and foam material. It not only has the high and low temperature resistance, weather resistance, chemical resistance, good flame retardancy and excellent electrical insulation of silicone rubber material, but also Low density, high flexibility, high resilience and good vibration and noise reduction properties of foam materials. Silicone rubber foam materials are widely used in the fields of rail transit, aerospace, automobile industry, electronic communication and chemical equipment as functional polymer materials such as vibration reduction, noise reduction, heat insulation, sound insulation, damping, and flame retardancy. [0003] As a sealing materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08K5/3492C08K3/22C08K5/14C08J9/10C08J9/00
CPCC08J9/10C08J9/0061C08J9/0095C08J2383/07C08J2483/07C08J2203/04C08K5/34928C08K2003/2227C08K5/14
Inventor 陈彰斌陈琪颜渊巍秦伟熊昌义高玮朱伟符玄
Owner ZHUZHOU TIMES NEW MATERIALS TECH
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