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Open- cells silicon rubber foam material and its preparation process and use

A foam material and silicone rubber technology, which is applied in the field of open-cell silicone rubber foam material and its preparation, can solve the problems of decreased mechanical properties, reduced cross-linking efficiency, slow heating and the like, and achieves excellent comprehensive performance, simple process and easy operation. Effect

Inactive Publication Date: 2006-12-27
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Silicone rubber foam materials are prepared by dissolution method. The traditional vulcanization method uses peroxide crosslinking, which consumes a lot of energy. Acidic substances and substances that are prone to hydrogen generation can easily passivate free radicals generated by peroxides and reduce crosslinking efficiency. In addition, the uniformity of peroxide crosslinking is affected by its dispersion state in silicone rubber. Due to the poor heat transfer of silicone rubber, the internal heating is slower than the surface layer, which often results in inconsistent surface and internal crosslinking degrees of the rubber; Oxide residues will also lead to late degradation of the product and a decrease in mechanical properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0024] 1. Mix 100 grams of dimethyl silicone rubber, 15 grams of fumed silica, and 2 grams of hydroxyl silicone oil at room temperature for 8 minutes with a double-roller open mill, and then store the mixed rubber at room temperature After 1 day, heat treatment at a temperature of 150°C for 5 hours, re-mill and add 150 grams of urea, 4 grams of triallyl isocyanurate, mix evenly, the mixing time is 8 minutes, and then vulcanize on a flat plate at room temperature On-machine compression molding into panels; available in cylindrical form 60 Co gamma ray source, in the air at room temperature, conducts radiation crosslinking to the silicone rubber compound, and the radiation dose is 30kGy. Soak the cross-linked film in boiling water, wash out the pore-forming agent, and dry it in an oven at a temperature of 40-50°C.

[0025] 2. Mix 100 grams of methyl vinyl silicone rubber, 25 grams of fumed silica, and 7 grams of octamethylcyclotetrasiloxane with an internal mixer at room temper...

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PUM

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Abstract

The invention discloses the open cell silicon rubber foamed material and preparing method, comprising the following steps: mixing the 100 parts silicon rubber, 15-80 parts strengthening agent, 2-15 parts structure control agent, 150-300 parts pore former and 0-4 parts cross-linking agent, radiating with electron beam or gamma ray with 20-100kGy radiation dose, washing cross-linking silicon rubber, getting pore former, and getting the product. The product can be used in damping, insulation and acoustic material.

Description

technical field [0001] The invention relates to an open-cell silicone rubber foam material, a preparation method and application thereof, and belongs to the field of polymer material processing. Background technique [0002] Silicone rubber foam material is a porous polymer elastic material prepared by foaming silicone rubber. According to the different cell structures, it can be divided into closed-cell, open-cell and mixed-cell silicone rubber foams. Silicone rubber foam material combines the properties of silicone rubber and foam material. It not only has the excellent properties of silicone rubber, but also has good high-energy impact resistance, sound insulation and heat insulation. It can be used for sealing, shock absorption, sound insulation and heat insulation. And other materials are increasingly widely used in the fields of transportation, petroleum, chemical industry, electronics industry and aerospace. [0003] There are two methods for preparing foam materials...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/14C08J9/00C08K5/54C08K5/29C08K3/34
Inventor 刘鹏波刘道龙徐闻
Owner SICHUAN UNIV
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