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Light porcelainized silicone 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 and tensile strength lower than 3MPa, and achieve the effects of excellent mechanical properties, simple preparation method and good application prospects.

Active Publication Date: 2021-08-27
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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  • Light porcelainized silicone rubber and preparation method thereof
  • Light porcelainized silicone rubber and preparation method thereof
  • Light porcelainized silicone rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A kind of lightweight porcelainable silicone rubber, its preparation method 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 620000g / mol), 7 parts by mass of methyl vinyl silicone rubber with a vinyl content of 3.0 mol% (number average molecular weight 640000g / mol) mol), 40 mass parts specific surface area 280m 2 / g of fumed silica, 6 parts by mass of hydroxyl silicone oil with a hydroxyl content of 8.5wt%, 0.6 parts by mass of hydrogen-containing silicone oil with a hydrogen content of 1.2wt%, and 2 parts by mass of γ-piperazinylpropylmethyl dimethyl Add oxysilane to the kneader, knead for 2 hours, then raise the temperature to 150°C and knead for 3 hours, then vacuumize and knead at 120°C for 1 hour, cool to room temperature, and obtain the silicone rubber base rubber;

[0045] 2) The silicone rubber base rubber of step 1), 0.4 parts by mass of boron oxide wi...

Embodiment 2

[0048] A kind of lightweight porcelainable silicone rubber, its preparation method 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 700000g / mol), 2 parts by mass of methyl vinyl silicone rubber with a vinyl content of 4.0 mol% (number average molecular weight 500000g / mol) mol), 50 mass parts specific surface area 200m 2 / g of fumed silica, 9 parts by mass of hydroxyl 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 trimethyl Add oxysilane to the kneader, knead for 2 hours, then raise the temperature to 160°C and knead for 2 hours, then vacuumize and knead at 130°C for 0.5h, cool to room temperature, and obtain the silicone rubber base rubber;

[0050] 2) the silicone rubber base rubber of step 1), 0.3 parts by mass of boron oxide wit...

Embodiment 3

[0053] A kind of lightweight porcelainable silicone rubber, its preparation method comprises the following steps:

[0054] 1) 95 parts by mass of methyl vinyl silicone rubber with a vinyl content of 0.08mol% (number average molecular weight 500000g / mol), 5 parts by mass of methyl vinyl silicone rubber with a vinyl content of 2.0mol% (number average molecular weight 700000g / mol) mol), 30 mass parts specific surface area 300m 2 / g of fumed silica, 5 parts by mass of hydroxyl silicone oil with a hydroxyl content of 10.0wt%, 0.9 parts by mass of hydrogen-containing silicone oil with a hydrogen content of 1.0wt%, and 3 parts by mass of γ-aminopropyltriethoxysilane added Kneader, knead for 1 hour, then heat up to 140°C and knead for 4 hours, then vacuumize and knead at 120°C for 1.5 hours, cool to room temperature, and obtain the silicone rubber base glue;

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

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Abstract

The invention discloses light porcelainized silicone rubber and a preparation method thereof. The light porcelainized silicone rubber comprises the following components: methyl vinyl silicone rubber, fumed silica, boric oxide, a platinum compound, nitrogen-containing silane, hydroxyl silicone oil, hydrogen-containing silicone oil and a vulcanizing agent. The preparation method comprises the following steps: 1) mixing methyl vinyl silicone rubber, fumed silica, nitrogen-containing silane, hydroxyl silicone oil and hydrogen-containing silicone oil to prepare silicone rubber base rubber; and 2) mixing the silicone rubber base rubber, boron oxide, a platinum compound and a vulcanizing agent, and vulcanizing to obtain the light porcelainized silicone rubber. The porcelainized silicone rubber is low in density, has excellent mechanical properties at normal temperature, can be converted into a hard and compact ceramic body at high temperature, and is excellent in porcelainization performance, the preparation method is simple, raw materials are easy to obtain, and large-scale production is facilitated.

Description

technical field [0001] The invention relates to the technical field of silicone rubber, in particular to a light-weight porcelain-able silicone rubber and a preparation method thereof. Background technique [0002] Porcelainable 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, which can effectively improve the performance of silicone rubber in high temperature environments. It is safe to use and has important applications in the fields of construction engineering, aerospace, and electrical and electronic. [0003] Traditional ceramicable silicone rubber is mainly composed of silicone rubber matrix, reinforcing filler, ceramic filler (such as: mica, wollastonite, calcium carbonate and kaolin, etc.), low melting point flux (such as: low melting point glass powder and boric acid ...

Claims

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Application Information

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Patent Type & Authority Applications(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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