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Blend of fluorubber and silastic, and preparation thereof

A fluororubber and silicone rubber technology, applied in the field of fluororubber and silicone rubber blending materials and their preparation, can solve the problems of insufficiently uniform blending, poor mechanical properties, large phase domains, etc. The method is simple and feasible, and the effect of low compression set

Inactive Publication Date: 2009-04-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the rubber matrix of this fluorosilicone blend rubber is fluorosilicone rubber, which belongs to a polymer copolymer, not a blend of fluororubber and silicone rubber. Due to the high cost of fluorosilicone rubber itself, the industrial application is limited.
[0006] To sum up, at present, there are few varieties of fluorine rubber and silicone rubber blends at home and abroad, and the mechanical properties are not good. This is mainly due to the large difference in polarity and viscosity between fluorine rubber and silicone rubber, resulting in blending Insufficient uniformity, large phase domains, and small interface bonding, so the mechanical properties are low
In order to improve the mechanical properties of the blend, it is necessary to select a suitable compatibilizer to improve the compatibility of fluororubber and silicone rubber, but there is no report about fluororubber and silicone rubber compatibilizer in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In this embodiment, the percentages of each component in the formula of the fluororubber and silicone rubber blend to the total weight of the formula are as follows:

[0037] Copolymer of vinylidene fluoride, hexafluoropropylene and tetrafluoroethylene 46.7%;

[0038] Methyl vinyl silicone rubber 11.7%;

[0039] Fluorine rubber grafted vinyl triethoxysilane 2.9%;

[0040] Magnesium Oxide 1.8%;

[0041] Calcium Hydroxide 3.5%;

[0042] Fumed silica 17.5%;

[0043] Hydroxyfluorosilicone 1.8%;

[0044] Calcium Fluoride 11.7%;

[0045]Dicumyl peroxide (DCP) 1.2%;

[0046] Triallyl isocyanurate (TAIC) 1.2%.

[0047] The preparation method of fluorine rubber and silicone rubber blend is as follows:

[0048] (1) The fluorine rubber (terpolymer) of 100 parts by weight, the vinyltriethoxysilane of 10 parts by weight and the DCP of 1 part by weight are mixed homogeneously on the open mill, add in the internal mixer and mix, The rotor speed is 60 rpm, the mixing temperatu...

Embodiment 2

[0056] In this embodiment, the percentages of each component in the formula of the fluororubber and silicone rubber blend to the total weight of the formula are as follows:

[0057] Copolymer of vinylidene fluoride, hexafluoropropylene and tetrafluoroethylene 29.2%;

[0058] Methyl vinyl silicone rubber 29.2%;

[0059] Fluorine rubber grafted γ-methacryloxypropyltrimethoxysilane 4%;

[0060] Magnesium Oxide 3%;

[0061] Calcium Hydroxide 2.3%;

[0062] Fumed silica 17.1%;

[0063] Hydroxy silicone oil 1.8%;

[0064] Calcium Fluoride 11%;

[0065] Dicumyl peroxide (DCP) 1.2%;

[0066] Triallyl cyanurate (TAC) 1.2%.

[0067] The preparation method of fluorine rubber and silicone rubber blend is as follows:

[0068] (1) 100 parts by weight of vinylidene fluoride, hexafluoropropylene and tetrafluoroethylene copolymer, 8 parts by weight of γ-methacryloxypropyl trimethoxysilane and 1 part by weight of DCP on the open mill Mix evenly, add it to the internal mixer for mixing,...

Embodiment 3

[0076] In this embodiment, the percentages of each component in the formula of the fluororubber and silicone rubber blend to the total weight of the formula are as follows:

[0077] Vinylidene fluoride, hexafluoropropylene copolymer 46.7%;

[0078] Methylphenyl vinyl silicone rubber 11.7%;

[0079] Fluorine rubber grafted vinyl tritertbutylperoxysilane 2%;

[0080] Magnesium Oxide 1.8%;

[0081] Calcium Oxide 3.5%;

[0082] Fumed silica 19.5%;

[0083] Hydroxyfluorosilicone 1.8%;

[0084] Diatomaceous earth 10%;

[0085] 2,5-Dimethyl-2,5-di-tert-butylperoxyhexane (bis-25) 1.5%;

[0086] Triallyl Isocyanurate 1.5%.

[0087] The preparation method of fluorine rubber and silicone rubber blend is as follows:

[0088] (1) Mix 100 parts by weight of fluororubber (dipolymer), 10 parts by weight of vinyltritertbutyl peroxysilane and 1 part by weight of DCP on the open mixer, and add them into the internal mixer for mixing For refining, the rotor speed is 65 rpm, the mixing te...

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Abstract

The invention relates to a blend of fluorine rubber and silicone rubber, as well as a preparation method thereof. The composition in weight percentage of the blend of fluorine rubber and silicone rubber is as follows: 12 to 50 percent of fluorine rubber, 12 to 50 percent of silicone rubber, 2.5 to 10 percent of compatibilizer, 2.5 to 10 percent of acid-acceptor, 12 to 35 percent of reinforcing filler, 0.5 to 7 percent of constitution controller, 0.5 to 3 percent of vulcanizing agent and 0.5 to 4 percent of crosslinking additive. The blend of fluorine rubber and silicone rubber is prepared by a mechanical blending method and is vulcanized by use of peroxides. Vulcanized rubber has good mechanical properties, heat resistance, low-temperature resistance, oil resistance and low-compression permanent deformation performance, and can be used for producing and manufacturing high-performance rubber tubes, adhesive tapes, sealing elements, rubber linings and the like needed in automobile, mechanical, chemical, aerospace and other industries.

Description

technical field [0001] The invention relates to the field of rubber blending materials, in particular to a fluorine rubber and silicone rubber blending material and a preparation method thereof, and belongs to the field of rubber and plastic modification and molding processing. Background technique [0002] Fluorine rubber is a special rubber with excellent performance. It has excellent high temperature resistance, oil resistance, solvent resistance and chemical corrosion resistance. It is mainly used in aerospace, machinery, petrochemical, automobile manufacturing and other industries. However, fluorine rubber also has disadvantages such as poor elasticity, poor low-temperature performance, large high-temperature compression permanent deformation, and high price. [0003] The molecular chain of silicone rubber is composed of Si-O chain links, which has excellent high and low temperature resistance, insulation, thermal conductivity, waterproof and non-toxic and non-polluting...

Claims

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Application Information

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IPC IPC(8): C08L27/12C08L83/04C08L51/00C08K13/02B29B13/00
Inventor 郭建华曾幸荣许传臻顾京生罗权焜
Owner SOUTH CHINA UNIV OF TECH
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