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A kind of silicone rubber and preparation method thereof

A technology of silicone rubber and silicone oil, applied in the field of silicone rubber, can solve the problems of poor ablation resistance and adhesion of silicone rubber

Active Publication Date: 2016-01-06
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of silicone rubber and its preparation method in order to solve the problem of poor ablation resistance and adhesion of existing silicone rubber

Method used

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  • A kind of silicone rubber and preparation method thereof
  • A kind of silicone rubber and preparation method thereof
  • A kind of silicone rubber and preparation method thereof

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preparation example Construction

[0030] The present invention also provides a kind of preparation method of silicone rubber, comprises as follows:

[0031] Step 1: reacting the phenolic resin monomer with formaldehyde to obtain the first intermediate;

[0032] Step 2: reacting the first intermediate obtained in step 1 with epichlorohydrin to obtain a second intermediate;

[0033] Step 3: reacting the second intermediate obtained in Step 2 with a transition metal catalyst and organic silicone oil to obtain silicone rubber.

[0034] According to the present invention, first put the phenolic resin monomer and formaldehyde into the reaction container, add an organic solvent, the organic solvent is preferably toluene, after stirring evenly, heat up the reaction to obtain the first intermediate, the reaction temperature is preferably 70-90°C, more preferably 80°C, the reaction time is preferably 3-5h, more preferably 4h; the molar ratio of the phenolic resin to formaldehyde is preferably 1:1. The phenolic resin m...

Embodiment 1

[0047]

[0048] Add 1 mol of m-cresol, 1 mol of formaldehyde and 80 ml of toluene into the reactor, stir evenly, raise the temperature to 80°C and stir for 4 hours to obtain the first intermediate; cool the temperature inside the reactor to room temperature, then add 1 mol of epichlorohydrin and 0.01 mol tetrabutylammonium bromide, stirred at room temperature for 2h, heated to 70°C and stirred for 2h to obtain the second intermediate; the temperature in the reactor was cooled to room temperature, and 0.003mol dibutyltin dilaurate and 50% hydrogen Add potassium oxide aqueous solution into the reaction kettle, continue to add 60ml of toluene, then gradually increase the temperature to 80°C, stir for 2 hours, take a sample for detection, stop heating after the viscosity reaches 120mPas, and distill under reduced pressure to remove toluene, water and volatile small molecules generated by the reaction to obtain the reaction solution; at 50°C, slowly add 1 mol of commercially avai...

Embodiment 2

[0055]

[0056]

[0057] Add 1 mol of m-ethylphenol, 1 mol of formaldehyde and 80 ml of toluene into the reactor and stir evenly, heat up to 70°C and stir for 5 hours to obtain the first intermediate; cool the temperature in the reactor to room temperature and add 1 mol of epichlorohydrin and 0.01 Tetrabutylammonium bromide, stirred at room temperature for 2 hours, heated to 60°C and stirred for 3 hours to obtain the second intermediate; the temperature in the reactor was cooled to room temperature, and 0.005mol dibutyltin dilaurate and 50% hydroxide Add potassium aqueous solution into the reaction kettle, continue to add 60ml of toluene, then gradually increase the temperature to 70°C, stir for 3 hours, take a sample for testing, stop heating after the viscosity reaches 120mPas, and distill under reduced pressure to remove toluene, water and volatile small molecules generated by the reaction to obtain a reaction solution ; At 40°C, slowly add 1 mol of commercially availa...

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Abstract

The invention provides silicone rubber and a preparation method thereof and belongs to the technical field of silicone rubber. The silicone rubber has a structure shown in the formula (I). Through introduction of a benzene ring-containing organic group and use of high carbon content of a phenolic epoxy group, burning-resistance of the silicone rubber is improved. Through use of excellent adhesion of the phenolic epoxy group, silicone rubber surface polarity is changed and silicone rubber adhesion is obtained. An experiment result shows that in fire resistance and peel strength tests on a silicone rubber composite material sheet prepared from the silicone rubber, the silicone rubber composite material sheet is not burned-through by burning at a temperature of 1050-1100 DEG C for 15min and thus the silicone rubber composite material sheet has good burning-resistance and has peel strength of 1.6kN / m.

Description

technical field [0001] The invention belongs to the technical field of silicone rubber, and in particular relates to a silicone rubber and a preparation method thereof. Background technique [0002] As a polymer elastic material, rubber has unique comprehensive properties due to the combination of inorganic and organic polymers in its molecules, such as high and low temperature resistance, low compression set, weather resistance, hydrophobicity, ozone aging resistance, etc. It has become an indispensable precious material for modern industry. [0003] According to the vulcanization mechanism, silicone rubber can be divided into three categories: room temperature vulcanization type, heating vulcanization type and addition reaction type. Among them, the addition reaction silicone rubber can be used for a long time in the temperature range of -65°C-200°C, and can maintain its soft and elastic properties, and has excellent electrical properties and chemical stability. It also h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G81/00C08G77/38C08G8/36C08L87/00
Inventor 郑春柏郑红星李智明倪江南吉红岩曹桂珍
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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