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A kind of light porcelain silicon rubber and preparation method thereof

A silicone rubber, lightweight technology, applied in the field of silicone rubber, can solve the problems of low elongation at break, tensile strength lower than 3MPa, etc., achieve excellent mechanical properties, simple preparation method, and improve the effect of porcelain performance

Active Publication Date: 2022-05-24
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Li et al added 20 parts by mass of aluminum hydroxide as a porcelain filler, 30 parts by mass of zinc borate, 30 parts by mass of glass powder with a melting point of 600°C and 60 parts by mass of glass powder with a melting point of 800°C as a flux in silicone rubber. Rubber has good porcelain properties, but the tensile strength is lower than 3MPa, and the elongation at break is lower than 325% (Study of flame-retardedsilicone rubber with ceramicifiable property, Fire and Materials, 2020,44(4):487- 496)
[0007] In summary, although the existing porcelainable silicone rubber has good porcelainizing performance, there are obvious defects, and it is still difficult to fully meet the needs of practical applications. Silicone Rubber with Performance and Lightweight Features

Method used

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  • A kind of light porcelain silicon rubber and preparation method thereof
  • A kind of light porcelain silicon rubber and preparation method thereof
  • A kind of light porcelain silicon rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A light-weight porcelainizable silicone rubber, the preparation method of which comprises the following steps:

[0044] 1) 93 parts by mass of methyl vinyl silicone rubber with a vinyl content of 0.05 mol% (number-average molecular weight 620,000 g / mol) and 7 parts by mass of methyl vinyl silicone rubber with a vinyl content of 3.0 mol % (number-average molecular weight of 640,000 g / mol) mol), 40 parts by mass specific surface area 280m 2 / g of fumed silica, 6 parts by mass of hydroxy silicone oil with a hydroxyl content of 8.5 wt %, 0.6 parts by mass of hydrogen-containing silicone oil with a hydrogen content of 1.2 wt %, and 2 mass parts of γ-piperazinyl propyl methyl dimethyl dimethyl Oxysilane was added to the kneader, mixed for 2 hours, then heated to 150 °C and mixed for 3 hours, then vacuum-mixed at 120 °C for 1 hour, and cooled to room temperature to obtain a silicone rubber base rubber;

[0045] 2) Combine the silicone rubber base rubber of step 1), 0.4 parts ...

Embodiment 2

[0048] A light-weight porcelainizable silicone rubber, the preparation method of which comprises the following steps:

[0049]1) 98 parts by mass of methyl vinyl silicone rubber with a vinyl content of 0.03 mol % (number average molecular weight 700,000 g / mol) and 2 mass parts of methyl vinyl silicone rubber with a vinyl content of 4.0 mol % (number average molecular weight of 500,000 g / mol) mol), 50 parts by mass specific surface area 200m 2 / g of fumed silica, 9 parts by mass of hydroxy silicone oil with a hydroxyl content of 5.0 wt %, 0.5 parts by mass of hydrogen-containing silicone oil with a hydrogen content of 1.5 wt %, and 1.5 parts by mass of N-phenyl-3-aminopropyl trimethylene Oxysilane was added to the kneader, mixed for 2 hours, then heated to 160°C and mixed for 2 hours, then vacuum-mixed at 130°C for 0.5 hours, and cooled to room temperature to obtain a silicone rubber base rubber;

[0050] 2) The silicone rubber base rubber of step 1), 0.3 parts by mass of boro...

Embodiment 3

[0053] A light-weight porcelainizable silicone rubber, the preparation method of which comprises the following steps:

[0054] 1) 95 parts by mass of methyl vinyl silicone rubber with a vinyl content of 0.08 mol% (number-average molecular weight 500,000 g / mol) and 5 parts by mass of methyl vinyl silicone rubber with a vinyl content of 2.0 mol % (number-average molecular weight of 700,000 g / mol) mol), 30 parts by mass specific surface area 300m 2 / g fumed silica, 5 parts by mass of hydroxy silicone oil with a hydroxyl content of 10.0 wt %, 0.9 parts by mass of hydrogen-containing silicone oil with a hydrogen content of 1.0 wt %, and 3 parts by mass of γ-aminopropyltriethoxysilane Kneader, kneading for 1 hour, then heated to 140°C and mixed for 4h, then vacuum-mixed at 120°C for 1.5h, cooled to room temperature to obtain silicone rubber base rubber;

[0055] 2) The silicone rubber base rubber of step 1), 0.8 parts by mass of boron oxide with an average particle size of 100 μm, ...

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Abstract

The invention discloses a light porcelainable silicon rubber and a preparation method thereof. The components of the light porcelainable silicone rubber of the present invention include methyl vinyl silicone rubber, fumed white carbon black, boron oxide, platinum compound, nitrogen-containing silane, hydroxyl silicone oil, hydrogen-containing silicone oil and vulcanizing agent, and its preparation The method comprises the following steps: 1) mixing methyl vinyl silicone rubber, fumed white carbon black, nitrogen-containing silane, hydroxyl silicone oil and hydrogen-containing silicone oil to prepare a silicone rubber base rubber; 2) mixing the silicone rubber base rubber, boron oxide , platinum compound and vulcanizing agent are mixed and then vulcanized to obtain light porcelainable silicone rubber. The porcelainable silicone rubber of the present invention has low density, has excellent mechanical properties at room temperature, can be transformed into a hard and dense ceramic body at high temperature, has excellent porcelain performance, and its preparation method is simple, raw materials are easy to obtain, and it is easy to carry out. mass production.

Description

technical field [0001] The invention relates to the technical field of silicone rubber, in particular to a light-weight porcelain-ceramic silicone rubber and a preparation method thereof. Background technique [0002] Porcelain silicone rubber is a kind of silicone rubber that can maintain good electrical insulation, high and low temperature resistance and weather resistance at room temperature, and can be transformed into a hard and dense ceramic body at high temperature. It is safe to use and has important applications in construction engineering, aerospace and electrical and electronic fields. [0003] The traditional porcelainizable silicone rubber is mainly composed of silicone rubber matrix, reinforcing filler, porcelain-forming filler (for example: mica, wollastonite, calcium carbonate and kaolin, etc.), low melting point flux (for example: low melting point glass powder and boric acid) salt, etc.) and other additives. Porcelain-forming fillers and low-melting-point...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08L83/04C08L83/05C08K5/544C08K3/38C08K5/5425C08K3/24C08K5/5455
CPCC08L83/04C08L2205/025C08L2205/035C08L2201/08C08K5/544C08K3/38C08K3/24C08K5/5455
Inventor 曾幸荣王焰林赖学军李红强
Owner SOUTH CHINA UNIV OF TECH
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