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Silicon rubber for high-temperature-resistant mold and preparation method of silicon rubber

A silicone rubber, high temperature resistant technology, applied in high temperature resistant mold silicone rubber and its preparation, silicone rubber and its preparation field, can solve the problems affecting product qualification rate, low production efficiency, surface cracking, etc., to inhibit oxidation aging, The effect of prolonging the service life and slowing down the aging rate at high temperature

Inactive Publication Date: 2013-10-02
JIANGSU TIANCHEN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The usual silicone rubber in the prior art is prone to aging phenomena during use, such as cracks on the surface, which will cause defects in the jewelry made, resulting in defective products, thereby affecting the pass rate of the product. Common in the prior art When the mold made of silicone rubber is used for production, the number of times of mold turning is only 30-40, and the production efficiency is low. Therefore, it is necessary to explore a silicone rubber specially used for high temperature resistant molds to improve the number of times of mold turning and the use of abrasive tools. life

Method used

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  • Silicon rubber for high-temperature-resistant mold and preparation method of silicon rubber

Examples

Experimental program
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Effect test

Embodiment 1

[0021] A preparation method of silicone rubber for high temperature resistant molds, the preparation steps are as follows: 100 parts of methyl vinyl silicone rubber raw rubber, 10 parts of methyl vinyl phenyl silicone rubber raw rubber, 20 parts of fumed white Add carbon black, 2 parts of hydroxy silicone oil and 0.17 parts of zinc stearate into the vacuum kneader for kneading. After the materials are kneaded into a ball, raise the temperature to 160°C, keep the temperature at this temperature for 2 hours, and then evacuate to the vacuum degree. It is -0.05MPa, after vacuuming for 30 minutes, the glue is released, and then 1 part of silicone resin and 1 part of nano-cerium oxide are added to the rubber on the double-roller mill for mixing, and finally filtered on the rubber filter, that is The silicone rubber for the high temperature resistant mold can be obtained.

Embodiment 2

[0023] A preparation method of silicone rubber for high temperature resistant molds, the preparation steps are as follows: 100 parts of methyl vinyl silicone rubber raw rubber, 10 parts of methyl vinyl phenyl silicone rubber raw rubber, 40 parts of fumed white Add carbon black, 6 parts of hydroxy silicone oil and 0.18 parts of zinc stearate into a vacuum kneader for kneading. After the materials are kneaded into a ball, heat up to 165°C, keep the temperature at this temperature for 2.5 hours, and then evacuate to a vacuum. The density is -0.06MPa, after vacuuming for 40 minutes, the rubber is released, and then 2 parts of silicone resin and 3 parts of nano-cerium oxide are added to the rubber on the double-roller mill for mixing, and finally filtered on the rubber filter. The silicone rubber for the high temperature resistant mold can be obtained.

Embodiment 3

[0025] A preparation method of silicone rubber for high temperature resistant molds, the preparation steps are as follows: 100 parts of methyl vinyl silicone rubber raw rubber, 10 parts of methyl vinyl phenyl silicone rubber raw rubber, 60 parts of fumed white Add carbon black, 8 parts of hydroxy silicone oil and 0.2 parts of zinc stearate into the vacuum kneader for kneading. After the materials are kneaded into a ball, heat up to 170°C, keep the temperature at this temperature for 3 hours, and then evacuate to vacuum It is -0.07MPa, after evacuating for 60 minutes, the glue is released, and then 4 parts of silicone resin and 4 parts of nano-cerium oxide are added to the rubber on the double-roller mill for mixing, and finally filtered on the rubber filter, that is The silicone rubber for the high temperature resistant mold can be obtained.

[0026] Add the liquid vulcanizing agent bis(2,4-dichlorobenzoyl peroxide) to the prepared high-temperature-resistant mold with silicone...

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Abstract

The invention discloses silicon rubber for a high-temperature-resistant mold and a preparation method of the silicon rubber. The preparation method of the silicon rubber for the high-temperature-resistant mold comprises the steps of: adding raw high-temperature-resistant methyl vinyl phenyl silicon rubber in raw methyl vinyl silicone rubber, and cooperatively utilizing silicon resin and nanometer cerium oxide as heat resistant agents to better inhibit the oxidative aging of a molecular chain and slow down the high-temperature aging speed of the silicon rubber. Since the silicon rubber disclosed by the invention has good high-temperature resistance, a grinding tool manufactured by the silicon rubber is unlikely to crack in the application process, the mould overturning times of the grinding tool are greatly increased, the utilization efficiency of the grinding tool is improved, and the service life of the grinding tool is greatly prolonged.

Description

technical field [0001] The invention relates to a silicone rubber and a preparation method thereof, in particular to a silicone rubber for high-temperature-resistant molds and a preparation method thereof, belonging to the technical field of rubber materials. Background technique [0002] In the prior art, silicon rubber abrasives are used for processing and forming zinc alloys. Since the melting point of zinc alloys is above 400° C., there is a high requirement for the high temperature resistance of the silicon rubber materials used in the abrasives. The usual silicone rubber in the prior art is prone to aging phenomena during use, such as cracks on the surface, which will cause defects in the jewelry made, resulting in defective products, thereby affecting the pass rate of the product. Common in the prior art When the mold made of silicone rubber is used for production, the number of times of mold turning is only 30-40, and the production efficiency is low. Therefore, it i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/06C08L83/04C08K3/36C08K5/098C08K3/22
Inventor 徐文俊郝冬冬徐庆琨
Owner JIANGSU TIANCHEN NEW MATERIALS
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