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Silicone rubber closed-cell foam material and preparation method thereof

A foaming material and silicone rubber technology, applied in the field of foaming materials, can solve the problems of reduced elasticity, difficult gas preservation, serious shrinkage, etc., and achieve the effects of maintaining high and low temperature resistance, simple and easy preparation method, and good comprehensive performance of materials

Active Publication Date: 2017-06-16
YIBAO FUJIAN POLYMER MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the good air permeability of silicone rubber makes it difficult to preserve the gas after foaming, the bubbles collapse, the shrinkage is serious, the specific gravity increases, the elasticity decreases, and the advantages of foam materials are lost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0045] The type, quantity and source of the main equipment used are:

[0046] Internal mixer 75 liters 1 set Shanghai Yingbei Machinery Factory

[0047] Open mill cb22 2 sets Shanghai Yingbei Machinery Factory

[0048] Extruder 200 type 1 set Shanghai Yingbei Machinery Equipment Factory

[0049] Vulcanizing machine / 2 sets Jiangsu Wuxi Jinhe Technology Co., Ltd.

Embodiment 1

[0052] The preparation method of the silicone rubber closed-cell foam material of embodiment 1

[0053] (1) Internal mixer mixing: first put 100 parts of modified silicone rubber into the material chamber of a 75L pressurized internal mixer and knead for 5 minutes, then mix 20 parts of fumed silica, 2 parts of hydroxyl Put the silicone oil into the material chamber of the internal mixer, slowly press down the weight, and knead for 5 minutes. Put 0.3 parts of DCP, 0.3 parts of TAIC, and 0.5 parts of zinc oxide into the material chamber of the internal mixer, pressurize and knead for 15 minutes, and clean 3 times in the middle. When the materials are mixed evenly and the temperature rises to 70°C, the glue will be removed.

[0054] (2) Mixing in the open mill: Put the rubber material obtained in step (1) into two sets of open mills in two parts, and pass it three times at the same time, and check whether the raw materials and additives are dispersed. Then thin pass until compl...

Embodiment 2

[0062] The preparation method of the silicone rubber closed cell material of embodiment 2 is as follows:

[0063] (1) Internal mixer mixing: first put 100 parts of modified silicone rubber into the material chamber of a 75L pressurized internal mixer and knead for 5 minutes, then mix 40 parts of fumed silica, 6 parts of hydroxyl Put the silicone oil into the material chamber of the internal mixer, slowly press down the weight, and knead for 5 minutes. Put 0.4 parts of DCP, 0.4 parts of TAIC, and 1 part of zinc oxide into the material chamber of the internal mixer, pressurize and knead for 15 minutes, and clean 3 times in the middle. When the materials are mixed evenly and the temperature rises to 70°C, the glue will be discharged.

[0064] (2) Mixing in the open mill: Put the rubber material obtained in step (1) into two sets of open mills in two parts, and pass it three times at the same time, and check whether the raw materials and additives are dispersed. Then thin pass unt...

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Abstract

The invention relates to a foamed material, and in particular relates to a silicone rubber closed-cell foamed material and a preparation method thereof. The silicone rubber closed-cell foamed material provided by the invention is prepared from the following raw materials in parts by weight: 100 PHR (Parts Per Hundreds of Rubber) of modified silicone rubber, 20-60 PHR of reinforcing agent, 2-10 PHR of constitution controller, 0.5-1.5 PHR of cell regulator, 0.5-1.5 PHR of activator, 0.3-0.5 PHR of cross-linking agent, 0.3-0.5 PHR of auxiliary cross-linking agent and 3-9 PHR of foaming agent. According to the silicone rubber closed-cell foamed material and the preparation method thereof, the silicone rubber closed-cell foamed material which is light and soft, and high in elasticity can be obtained by cross-linking and foaming through appropriate formula and process, and properties such as high and low temperature resistance, moisture resistance and electric insulation of the silicone rubber can be kept.

Description

technical field [0001] The invention relates to a foaming material, in particular to a silicone rubber closed-cell foaming material and a preparation method thereof. Background technique [0002] Silicone rubber foam materials have good thermal stability, low temperature flexibility, moisture resistance, weather resistance and electrical insulation, and are widely used in various fields of the national economy. Used in the field of automotive electronics, it can be used as shock absorption, sound insulation, sealing, electrical insulation materials, etc. Used in the aerospace field, it can be used as a filling material for propellers and wing cabins. Used in the field of construction, it can be used as a sealing material for expansion joints and ground joints of high-rise buildings. Used in the medical field, it can be used as filling and repairing materials for medical orthopedic surgery. Used in daily life, it can be used as mattresses, cushions, shoulder pads. However...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08K13/02C08K3/36C08K5/103C08K3/22C08K5/14C08J9/10B29B7/28
Inventor 陈奕汲侯汝红
Owner YIBAO FUJIAN POLYMER MATERIALS
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