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Addition type liquid fluorosilicone rubber composition and preparation method thereof

A technology of rubber composition and liquid fluorosilicone, which is applied in the field of liquid fluorosilicone rubber, can solve problems such as insufficient crosslinking of addition-type liquid fluorosilicone rubber, and achieve the effects of good solvent resistance, good mechanical properties, and high degree of reaction

Active Publication Date: 2018-12-11
福建拓烯新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to overcome the deficiencies of the prior art, provide an addition type liquid fluorosilicone rubber composition, and fundamentally solve the problem of insufficient crosslinking of the addition type liquid fluorosilicone rubber

Method used

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  • Addition type liquid fluorosilicone rubber composition and preparation method thereof

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preparation example Construction

[0029] Preparation of Vinyl Fluorosilicone Oil 1

[0030] Add 100 parts by mass of trimethyltri(trifluoropropyl)cyclotrisiloxane, 0.5 parts by mass of tetramethyltetravinylcyclotetrasiloxane and 3 parts by mass of tetramethyl Divinyldisiloxane, add 1 mass part of 1 wt% amine gel catalyst under stirring, heat up to 120°C for 2 hours, heat up to 160°C for 0.5 hours, reduce pressure to below -0.09MPa to remove low boilers 1 hour, to obtain vinyl fluorosilicone oil 1, the structural formula is ViMe 2 SiO(R f MeSiO) 87.9 (ViMeSiO) 1.2 SiMe 2 Vi.

[0031] Preparation of vinyl fluorosilicone oil 2

[0032] Add 100 parts by mass of trimethyltri(trifluoropropyl)cyclotrisiloxane, 20 parts by mass of octamethylcyclotetrasiloxane, 3 parts by mass of tetramethyldivinyl Disiloxane, add 1.2 parts by mass of amine gel catalyst under stirring, heat up to 110-120°C for 2 hours, heat up to 160-170°C for 0.5 hours, and decompress to -0.09MPa to remove low boilers for 1 hour , to obtain vi...

Embodiment 1

[0039]Each component has the following mass ratios: 1100 parts by mass of vinyl fluorosilicone oil, 1110 parts by mass of mercaptopropyl fluorosilicone oil, 10 parts by mass of benzoin dimethyl ether, 80 parts by mass of fumed white carbon black, and 5 parts by mass of high vinyl fluorosilicone oil Parts, 10 parts by mass of low-viscosity hydroxyfluorosilicone oil,

[0040] Add vinyl fluorosilicone oil 1, fumed silica and low-viscosity hydroxyl fluorosilicone oil into the kneader. Vinyl fluorosilicone oil, mercaptopropyl fluorosilicone oil 1 and benzoin dimethyl ether were stirred evenly to obtain liquid fluorosilicone rubber 1.

Embodiment 2

[0042] The components are in the following mass ratios: 2100 parts by mass of vinyl fluorosilicone oil, 2120 parts by mass of mercaptopropyl fluorosilicone oil, 6 parts by mass of benzoin butyl ether, 60 parts by mass of fumed silica, 6 parts by mass of fluorosilazane,

[0043] Add vinyl fluorosilicone oil 2, fumed silica and fluorosilazane into the kneader, stir well, raise the temperature to 100°C, reduce the pressure to <-0.08MPa, raise the temperature to 150°C, and continue stirring for 1 hour. Cool, add mercaptopropyl fluorosilicone oil 2 and benzoin butyl ether, and stir evenly to obtain liquid fluorosilicone rubber 2.

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Abstract

The invention relates to the field of liquid fluorosilicone rubber, in particular to an addition type liquid fluorosilicone rubber composition and a preparation method thereof. The liquid fluorosilicone rubber is prepared from the following components in percentage by weight: 100 parts of vinyl fluorosilicone oil, 70 to 120 parts of mercaptopyl fluorosilicone oil, 5 to 10 parts of a photoinitiator, 0 to 100 parts of filler, high vinyl fluorosilicone oil, and 0 to 15 parts of an auxiliary agent. The vinyl fluorosilicone oil and the mercaptopyl fluorosilicone oil provided by the invention are irradiated with ultraviolet light by the photoinitiator, and are subjected to addition and crosslinking to obtain the liquid fluorosilicone rubber. The method provided by the invention is simple, does not need to be heated, and does not need to use expensive precious metal catalysts, and the liquid fluorosilicone rubber having different oil resistance can be obtained by adjusting the content of trifluoropropyl group in the fluorosilicone oil.

Description

technical field [0001] The invention relates to the field of liquid fluorosilicone rubber, in particular to an addition-type liquid fluorosilicone rubber composition and a preparation method. Background technique [0002] Liquid fluorosilicone rubber has excellent properties such as high and low temperature resistance (-55-205°C), chemical resistance, fuel resistance, and ultraviolet resistance. Addition-type liquid fluorosilicone rubber can be injection-molded, and parts of different shapes can be prepared according to requirements. [0003] Generally, addition-type liquid fluorosilicone rubber is obtained by heating, cross-linking and curing vinyl fluorosilicone oil and hydrogen-containing fluorosilicone oil under the presence of a hydrosilylation catalyst. However, in the molecular chain of vinyl fluorosilicone oil, since the structure of the trifluoropropyl group is longer than the length of the vinyl structure, the trifluoropropyl group causes partial shielding of the ...

Claims

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Application Information

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IPC IPC(8): C08L83/08C08K3/36C08G77/28C08G77/24
CPCC08G77/24C08G77/28C08K2201/006C08L83/08C08L2205/025C08L2205/035C08K3/36
Inventor 翁松青
Owner 福建拓烯新材料科技有限公司
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