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Oil-resistant silicon rubber and preparation method thereof by in-situ reaction

A silicone rubber and oil-resistant technology, applied in the field of oil-resistant silicone rubber and its in-situ reaction preparation, can solve the problems of affecting the performance of silicone rubber materials, high production cost, poor compatibility, etc., and achieve high-efficiency rubber processing technology and improve oil resistance. Effect

Active Publication Date: 2013-08-28
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production cost of these rubbers is high, the technical barriers are high, and it is difficult to promote them on a large scale.
On the other hand, the oil resistance of silicone rubber materials can be improved by adding fillers or blending with other polar polymers, but due to the poor compatibility of silicone rubber with polar polymers or fillers, blending The method is not easy to achieve uniform dispersion of the two phases, which will affect the performance of silicone rubber materials

Method used

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  • Oil-resistant silicon rubber and preparation method thereof by in-situ reaction
  • Oil-resistant silicon rubber and preparation method thereof by in-situ reaction
  • Oil-resistant silicon rubber and preparation method thereof by in-situ reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] At room temperature, add 100g methyl vinyl silicone rubber and 40g fumed silica to the open mill and mix for 20 minutes, then add 2g hydroxy silicone oil and mix for 5 minutes, place the obtained silicone rubber mixture for 6 hours, and then add it to In an open mill, add 10g of HEMA into the rubber mix at room temperature. After the HEMA is added, mix for 5 minutes, then add 2g of TBPB and mix for 5 minutes to obtain a silicone rubber mix. Put the mixed rubber in the mold, pressurize and exhaust, press at 145°C for 30 minutes (the in-situ grafting reaction occurs within this period), take it out from the mold, and obtain an oil-resistant silicone rubber material.

Embodiment 2

[0020] At room temperature, add 100g methyl vinyl silicone rubber and 30g fumed silica to the open mill and mix for 10 minutes, then add 1g hydroxy silicone oil and mix for 5 minutes, place the obtained silicone rubber mixture for 24 hours, then add it to In the open mill, add 20g of HEMA into the rubber mixture at room temperature. After the HEMA is added, mix for 10 minutes, then add 2g of BPO and mix for 10 minutes to obtain a silicone rubber mixture. Put the mixed rubber in the mold, pressurize and exhaust, press at 110°C for 60 minutes (the in-situ grafting reaction occurs within this period), take it out from the mold, and obtain an oil-resistant silicone rubber material.

Embodiment 3

[0022] At room temperature, add 100g methyl vinyl silicone rubber and 40g fumed silica to the open mill and mix for 15 minutes, then add 2g hydroxy silicone oil and mix for 5 minutes, place the obtained silicone rubber mixture for 10 hours, and then add it to In the open mill, 5g of HPMA was added to the rubber mix at room temperature. After the HPMA was added, it was mixed for 8 minutes, and then 1g of TBPB was added and mixed for 8 minutes to obtain a silicone rubber mix. Put the mixed rubber in the mold, pressurize and exhaust, press at 140°C for 35 minutes (the in-situ grafting reaction occurs within this period), take it out from the mold, and obtain an oil-resistant silicone rubber material.

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Abstract

The invention relates to an oil-resistant silicon rubber and a preparation method thereof by in-situ reaction. The oil-resistant silicon rubber is composed of the following components in parts by weight: 100 parts of silicon rubber, 30-50 parts of white carbon black, 1-5 parts of hydroxy silicon oil, 5-20 parts of polar monomer with active group and 0.5-3 parts of crosslinking agent. The preparation method comprises the following steps: mechanically blending to uniformly disperse the silicon rubber base, white carbon black, hydroxy silicon oil, polar monomer with active group and crosslinking agent, and carrying out in-situ reaction on the compounded rubber at 110-180 DEG C to obtain the oil-resistant silicon rubber material. By adopting the in-situ reaction method, the generated polar polymer phase can be uniformly dispersed in the silicon rubber base, thereby solving the problem that the two phases can not be easily dispersed when the silicon rubber and polar polymer are directly blended to prepare the oil-resistant rubber material. The silicon rubber material prepared by in-situ reaction has favorable oil resistance.

Description

Technical field: [0001] The invention relates to an oil-resistant silicone rubber and an in-situ reaction preparation method thereof. Background technique: [0002] Silicone rubber has excellent properties such as high and low temperature resistance, weather resistance, ozone resistance, dielectric properties and physiological inertness. It has been widely used in many fields such as aerospace, automotive machinery, electrical and electronic and biomedicine, and has become an indispensable part of the national economy. A missing class of elastomeric materials. However, most silicone rubbers (such as the most widely used methyl vinyl silicone rubber) have poor oil resistance, which limits their application in automobiles and other industrial fields that are in contact with solvents. Therefore, it is necessary to improve the oil resistance of silicone rubber. is of great significance. [0003] To improve the oil resistance of silicone rubber, on the one hand, polar groups ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/12C08K3/36C08K5/14C08J3/24
Inventor 张立群孟阳魏征储俊峰刘超豪
Owner BEIJING UNIV OF CHEM TECH
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