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Silicon rubber and preparation method thereof

A technology of silicone rubber and rubber material, which is applied in the field of silicone rubber with high electrical properties and its preparation, can solve the problems of rising critical service temperature, reducing the insulation of silicone rubber, and limiting the application in cold regions, so as to improve cold resistance and broaden the scope of production. The effect of application range

Inactive Publication Date: 2013-04-03
JIANGSU TIANCHEN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the insulation of silicone rubber will be greatly reduced at low temperatures, and its critical service temperature will rise sharply, which greatly limits the application in cold regions.

Method used

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  • Silicon rubber and preparation method thereof
  • Silicon rubber and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0012] A method for preparing silicone rubber with low temperature resistance and high dielectric properties. The preparation steps are as follows: knead methylphenylvinyl silicone rubber raw rubber and zinc stearate in a vacuum kneader for 3 minutes, and then vapor phase whitening Add carbon black and hydroxy silicone oil to the vacuum kneader in 4 times, fully stir after each addition, stir the mixture at a speed of 10-50 rpm, stir and mix the mixture evenly, heat up to 160°C after the rubber is kneaded and shaped, heat up 90 minutes, then evacuated to a vacuum degree of -0.07MPa, after 30 minutes of vacuuming, the glue was released, and then the rubber material was thinly passed on the double-roller open rubber mixing machine for 3 times, and then filtered on the rubber filter to obtain clean The rubber without impurities, and then mix the rubber with 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane evenly in an open rubber mixer, and put it on a flat vulcanizing machine Carry ...

Embodiment 2

[0014] A preparation method of silicone rubber with low temperature resistance and high dielectric properties, the preparation steps are as follows: knead methylphenyl vinyl silicone rubber raw rubber and zinc stearate in a vacuum kneader for 4 minutes, and then precipitate white Add carbon black and hydroxy silicone oil to the vacuum kneader in 3 times, fully stir after each addition, stir the mixture at a speed of 10-50 rpm, stir and mix the mixture evenly, heat up to 170°C after the rubber is kneaded and shaped 100 minutes, then evacuated to a vacuum degree of -0.06MPa, after 45 minutes of vacuuming, the glue was released, and then the rubber material was thinly passed 4 times on the double-roller open rubber mixer, and then filtered on the rubber filter to obtain clean The rubber without impurities, and then mix the rubber with 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane evenly in an open rubber mixer, and put it on a flat vulcanizing machine Carry out molding vulcanizati...

Embodiment 3

[0016] A preparation method of silicone rubber with low temperature resistance and high dielectric performance, the preparation steps are as follows: knead methylphenyl vinyl silicone rubber raw rubber and zinc stearate in a vacuum kneader for 5 minutes, and then vapor phase whitening Carbon black and hydroxy silicone oil are added to the vacuum kneader in 5 times, fully stirred after each addition, the stirring speed is 10-50 rpm, and the mixture is stirred evenly. 120 minutes, then evacuated to a vacuum degree of -0.05MPa, after 60 minutes of vacuuming, the glue was released, and then the rubber material was passed through the double-roller open rubber mixing machine for 5 times, and then filtered on the rubber filter to obtain clean The rubber without impurities, and then mix the rubber with 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane evenly in an open rubber mixer, and put it on a flat vulcanizing machine Carry out molding vulcanization, the vulcanization temperature is 1...

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Abstract

The invention discloses a silicon rubber and a preparation method thereof, belonging to the technical field of rubber materials. The silicon rubber is prepared from rubber and a reinforced material in a kneading machine through physical change and chemical change by mixing, wherein the reinforced material is white carbon black, the white carbon black is used as the reinforced material so that the strength of vulcanizing silicon rubber can be increased, the rubber is methyl phenyl vinyl silicone rubber so that the cold resistance can be effectively improved; hydroxyl silicone oil is a structure control agent, zinc stearate is a release agent, and 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane without toxicity and pungent smell and with good high-temperature vulcanization effect is selected as a peroxide vulcanization agent. The silicon rubber provided by the invention has low-temperature resistance and high dielectric property, can meet the special requirement of some products on the market, is remarkably unchanged in hardness, tear strength and elongation at break, and thus the application range of the silicon rubber is enlarged.

Description

technical field [0001] The invention belongs to the technical field of rubber materials, in particular to a silicone rubber with high electrical properties and a preparation method thereof. Background technique [0002] Silicone rubber (Silicone Rubber, SR) as a special rubber, belongs to synthetic rubber. The structure of SR with silicon atoms and oxygen atoms alternately arranged in the main chain makes it more stable to heat and oxygen than ordinary organic polymers. There is no conductive structure in the silicone polymer, and there are no conductive particles in the polymer molecule, so the polymer is a good insulator with a large volume resistivity. Compared with ordinary rubber, silicone rubber has the following advantages: it has excellent properties such as high and low temperature resistance, electrical insulation, ozone resistance, radiation resistance, flame retardant, water repellency, corrosion resistance, non-toxic and tasteless, and physiological inertia. H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/06C08K3/36C08K5/098C08K5/14B29C35/02
Inventor 徐文俊姚恒玺徐庆锟
Owner JIANGSU TIANCHEN NEW MATERIALS
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