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Composite enhanced high-flexibility microporous silicone rubber foam material and preparation method thereof

A foam material and composite reinforcement technology are applied in the field of composite reinforced high-flexibility microporous silicone rubber foam materials and their preparation, which can solve the tedious work, requiring two times to complete, poor wear resistance of foam materials, and low material resilience. and other problems, to achieve the effects of excellent comprehensive performance, improved softness and wear resistance, and high production efficiency

Active Publication Date: 2015-09-09
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the reinforcing filler for silicone rubber foam is still mainly white carbon black, such as patent document CN1884378A "a kind of open-cell silicone rubber foam material and its preparation method and application", patent document CN101781464A "a kind of preparation of silicone rubber foam material Method", patent document CN102093718B "a preparation method of low density, high porosity silicone rubber foam material", patent document "a high temperature resistant silicone rubber foam material and its preparation method" and application number 201510180719.2 The patent document of 201510180679.1 "A Silicone Rubber Microporous Foam Material with Hybrid Cell Structure and Its Preparation Method", although the tensile strength of the silicone rubber foam will increase significantly with the increase of the amount of silica (Chen Meihua, Zhao Qi, Luo Shikai, et al. Research on rheological and mechanical properties of RTV silicone rubber foam materials by white carbon black. Elastomers, 2011,21(4):15-19.), but followed by material hardening, Decreased resilience, etc.
For example, the patent document with application number 201510180719.2 "a high temperature resistant silicone rubber foam material and its preparation method" and the patent document with application number 201510180679.1 "a silicone rubber microporous foam material with mixed cell structure and its preparation The Shore hardness of the foam material obtained in "method" is 19.5~23.5 and 20.03~30.56 respectively, and the compression set (50%, 23 ℃ × 22h, %) is respectively 3.29~5.52% and 2.86~3.81%. The texture of the material is relatively hard, the resilience of the material is low, and the wear resistance of the foam material prepared by the above method is poor. In addition, the existing preparation method of the silicone rubber foam material, as in the above two patent documents, dissolves and forms pores The steps of drying and drying are cumbersome and need to be completed twice

Method used

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  • Composite enhanced high-flexibility microporous silicone rubber foam material and preparation method thereof
  • Composite enhanced high-flexibility microporous silicone rubber foam material and preparation method thereof
  • Composite enhanced high-flexibility microporous silicone rubber foam material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Step 1. Add 100g of methyl vinyl silicone rubber base material with a vinyl content of 0.1mol% into a two-roll mill, masticate at 60°C for 5 minutes, then add 15g of fumed silica and 5g of carbon fiber, 1g of silane coupling agent KH550, 2.5mL of hydroxy silicone oil, mixed for 5 minutes, then added 80g of ammonium carbonate, 5g of triallyl cyanurate, 1g of chitin, and continued to mix for 5 minutes to obtain rubber, and then The preliminary mixed rubber material was stored statically for 30 hours, and then the rubber material was re-mixed at 60°C for 8 minutes. At room temperature, the mixed rubber material was molded into a sheet or block on a tablet press; The drum speed of the two-roll mill is set to 300r.min -1 ; The ammonium carbonate is ground before use to obtain particles with a particle size of 200 μm;

[0042] Step 2. After the formed sheet or block is plastic-sealed, place it in the air at room temperature 60 Radiation cross-linking is carried out in the C...

Embodiment 2

[0045] Step 1. Add 100g of methyl vinyl silicone rubber base material with a vinyl content of 0.1mol% into a two-roll mill, masticate at 50°C for 3 minutes, then add 5g of precipitated silica and 5g of carbon fiber, 2g silane coupling agent KH560, 2mL hexamethyldisilazane, knead for 5 minutes, then add 90g ammonium carbonate, 3g triallyl cyanurate, 1g chitin, 1g magnesium hydroxide, continue kneading for 5 Minutes to get the rubber material, and then store the rubber material after preliminary mixing for 30 hours, and then re-mix the rubber material at 50°C for 8 minutes, and mold the mixed rubber material on a tablet press at room temperature Formed into sheets or blocks; the rotary drum speed of the two-roll mill is set to 500r.min -1 ; The ammonium carbonate is ground before use to obtain particles with a particle size of 300 μm;

[0046] Step 2. After the formed sheet or block is plastic-sealed, place it in the air at room temperature 60 Radiation cross-linking is carrie...

Embodiment 3

[0049] Step 1. Add 100g of methyl vinyl silicone rubber base material with a vinyl content of 0.11mol% into a two-roll mill, masticate at 50°C for 5 minutes, then add 15g of precipitated silica and 10g of carbon fiber, 2g titanate CB-401, 2.5mL cyclic trisilazane, knead for 5 minutes, then add 80g ammonium chloride, 3g-1,6-hexanediol diacrylate, 1g chitin, 1g magnesium hydroxide , 1g of dihydroquinoline, and continue mixing for 4 minutes to obtain a rubber compound, then statically store the initially mixed rubber compound for 35 hours, then re-mix the rubber compound for 8 minutes at 50°C, and at room temperature, place the The rubber material that has been mixed is molded into a sheet or a block on a tablet press; the rotating drum speed of the two-roll mill is set to 400r.min -1 ; The ammonium chloride is ground before use to obtain particles with a particle size of 200 μm;

[0050] Step 2. After the formed sheet or block is plastic-sealed, place it in the air at room temp...

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Abstract

The invention discloses a composite enhanced high-flexibility microporous silicone rubber foam material and a preparation method thereof. The preparation method is characterized in that the preparation method comprises the steps of performing mixing and forming to 100 parts of silicone rubber base material, 10-25 parts of reinforcing agent, 2-3 parts of structure controlling agent, 80-100 parts of pore-forming agent, 0-3 parts of radiation sensitizer, 1-2 parts of tackifier and 1-3 parts of functional additive, performing radiation crosslinking at gamma ray absorbed dose of 40-60kGy, performing solventing-out pore forming through warm water, and performing drying to obtain the microporous silicone rubber foam material with excellent performance. The composite enhanced high-flexibility microporous silicone rubber foam material prepared by adopting the preparation method disclosed by the invention presents black gloss, is soft in texture, is tiny in pore diameter, is proper in crosslinking density and gel content, is higher in tensile strength and elongation at break and is excellent in resilience, the process is convenient, the energy saving performance and environmental friendliness are good, the repeatability is good and the production efficiency is high.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a composite reinforced highly flexible microporous silicon rubber foam material and a preparation method thereof. Background technique [0002] Silicone rubber foam material is an elastic porous material made of silicone rubber base material after foaming or forming holes in a certain form. It integrates the characteristics of silicone rubber and foam material, and not only has wide temperature range performance and electrical insulation performance. , radiation resistance, chemical stability, etc., and also has high flexibility, high elasticity, and excellent high-energy impact resistance and sound insulation performance (Xing Songmin, Wang Yilu. Silicone synthesis process and product application. Chemical Industry Press, Beijing. 2000. Wu Wenhao, Song Hongtao, Huang Wei, etc. Preliminary Theoretical Exploration of the Radiation Stability of Silicone Rubber Foam Mate...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/04C08K13/04C08K3/36C08K7/06C08K5/544C08K5/5435C08K5/10C08K5/5445C08K3/26C08K5/103
Inventor 宋宏涛黄玮安友李闯傅依备陈洪兵朱莎马亮陈琴
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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