Preparation method for alternating multilayer microporous silicone rubber foam material

A foam material and silicone rubber technology, which is applied in the field of preparation of alternate multi-layer microporous silicone rubber foam materials, can solve the problems of compatibility and processing conditions affecting the actual performance of composite materials, and achieve high compression resistance and improved compression strength. Effect

Active Publication Date: 2019-03-29
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above literature research mainly focuses on the use of different raw materials for alternate multi-layer co-extrusion. The compatibility between raw materials and processing conditions will seriously affect the actual performance of composite materials.

Method used

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  • Preparation method for alternating multilayer microporous silicone rubber foam material
  • Preparation method for alternating multilayer microporous silicone rubber foam material
  • Preparation method for alternating multilayer microporous silicone rubber foam material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of alternating multilayer microporous silicone rubber foam material, comprising the following steps:

[0032] (1) Preparation of silicone rubber compound

[0033] The distribution ratio of each component of silicone rubber A is: 100 parts of methyl vinyl silicone rubber, 40 parts of fumed silica, 8 parts of hydroxyl silicone oil, and 1 part of vulcanizing agent dicumyl peroxide;

[0034] The distribution ratio of each component of silicone rubber B is: 100 parts of methyl vinyl silicone rubber, 40 parts of precipitated silica, 4 parts of hydroxyl silicone oil, and 1 part of dicumyl peroxide;

[0035] (2) Preparation of multilayer silicone rubber composites

[0036] The temperature of each section of the two extruders of the alternating multi-layer co-extrusion equipment is about 80°C, and the speed ratio is 1:1, and an 8-layer silicone rubber alternating multi-layer composite material is prepared, and its size is about 500×50×2mm 3 ;

[0037] (3)...

Embodiment 2

[0044] (1) Preparation of silicone rubber compound

[0045] The distribution ratio of each component of silicone rubber A is: 100 parts of methyl vinyl silicone rubber, 50 parts of fumed silica, 8 parts of hydroxyl silicone oil, 1 part of vulcanizing agent dicumyl peroxide; the distribution of each component of silicone rubber B The ratio is: 100 parts of methyl vinyl silicone rubber, 50 parts of precipitated silica, 4 parts of hydroxyl silicone oil, and 1 part of dicumyl peroxide;

[0046] (2) Preparation of multilayer silicone rubber composites

[0047] The temperature of each section of the two extruders of the alternating multi-layer co-extrusion equipment is about 80°C, and the speed ratio is 2:3. A 16-layer silicone rubber alternating multi-layer composite material is prepared, and its size is about 500×50×2mm 3 ;

[0048](3) Preparation of multi-layer silicone rubber samples to be foamed

[0049] The length x width x thickness is 40 x 30 x 2mm 3 The multi-layer sili...

Embodiment 3

[0055] (1) Preparation of silicone rubber compound

[0056] The distribution ratio of each component of silicone rubber A is: 100 parts of methyl vinyl silicone rubber, 40 parts of fumed silica, 8 parts of hydroxyl silicone oil, 1 part of vulcanizing agent dicumyl peroxide; the distribution of each component of silicone rubber B The ratio is: 100 parts of methyl vinyl silicone rubber, 40 parts of precipitated silica, 4 parts of hydroxyl silicone oil, and 1 part of dicumyl peroxide;

[0057] (2) Preparation of multilayer silicone rubber composites

[0058] The temperature of each section of the two extruders of the alternating multi-layer co-extrusion equipment is about 80°C, and the speed ratio is 2:1. A 32-layer silicone rubber alternating multi-layer composite material is prepared, and its size is about 500×50×2mm 3 ;

[0059] (3) Preparation of multi-layer silicone rubber samples to be foamed

[0060] The length x width x thickness is 40 x 30 x 2mm 3 The multi-layer sil...

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Abstract

The invention discloses a preparation method for an alternating multilayer microporous silicone rubber foam material. The preparation method comprises the following steps that (1), silicone rubber compound is prepared; (2) coextrusion is performed, and a silicone rubber composite material with an alternating multilayer structure is obtained; (3), a multi-layer silicone rubber sample to be foamed is prepared; (4), supercritical fluid foaming is performed, wherein the prepared multi-layer silicone rubber sample to be foamed is placed into an autoclave, heating and pressurizing are performed to the set conditions so as to convert gas into a supercritical state, quick decompressing is performed after swelling and saturation for a period of time, and the multi-layer silicone rubber foamed sample is obtained; and (5), vulcanization is performed. According to the preparation method, by utilizing the difference of reinforcing and nucleation efficiency of different fillers in a silicone rubbermatrix, the difference of cells in adjacent layers of the prepared alternating multilayer microporous silicone rubber foam material is obvious, so that the compression strength of the silicone rubberfoam material is greatly improved, and the compression resistance of the silicone rubber foam material is remarkably higher than that of the silicone rubber foam material with single distribution anddouble distribution of the cells.

Description

technical field [0001] The invention belongs to the technical field of silicon rubber foam materials, and in particular relates to a preparation method of alternating multilayer microporous silicon rubber foam materials. Background technique [0002] Silicone rubber foam material has the advantages of high resilience, high and low temperature resistance, and aging resistance, and can be used as a shock-absorbing, buffering, and thermal insulation material in a more complex environment. However, silicone rubber foam is an elastic foam material, and its compressive stress-strain curve is not obvious. How to improve and broaden the compressive stress-strain platform of silicone rubber foam, realize the maximum energy absorption and constant stress maintenance to realize the function of mechanical self-adaptation, and achieve the purpose of better shock absorption and protection are important issues in the research of silicone rubber foam materials. Xiang Bin and others prepare...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C67/20C08L83/07C08L83/04C08K3/36C08K5/12
CPCB29C67/20C08J9/0023C08J9/0061C08J9/0066C08J9/0095C08J9/12C08J9/122C08J2203/06C08J2203/08C08J2383/07C08J2483/04
Inventor 刘涛贾亚兰张风顺向斌雷雅杰贺江平戴西洋
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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