High-temperature/pressure-resistant vapor-resistant fluororubber compounded rubber

Abstract

The invention relates to a high-temperature / pressure-resistant vapor-resistant fluororubber compounded rubber which is prepared by mixing the following raw materials in parts by weight: 90 parts of unvulcanized fluororubber, 10 parts of master batch, 1-2 parts of peroxide vulcanizing agent, 3-5 parts of peroxide vulcanization accelerator, 10-40 parts of carbon black filler, 0-10 parts of PTFE (polytetrafluoroethylene) resin, 1-3 parts of mold release agent and 10-25 parts of acid acceptor. By optimizing the proportioning of the basic unvulcanized rubbers and mixing proportioning of the novel assistants, the fluororubber compounded rubber prepared by the special preparation method has higher physical properties and improved vapor resistance, and satisfies the resistance to harsh chemical mediators. Therefore, the improved fluororubber compounded rubber has excellent tensile strength, percentage of elongation and high-temperature properties, also has improved vapor resistance as compared with the traditional fluororubber, and meanwhile, ensures excellent resistance to chemical mediators.

Description

technical field [0001] The invention relates to the field of organic high molecular compounds, in particular to a fluorine-containing organic high molecular polymer. Background technique [0002] In the rubber industry, fluorine rubber has incomparable excellent properties of other rubbers. It is a new type of polymer material with excellent heat resistance, medium resistance and oil resistance, as well as good physical and mechanical properties, electrical insulation and radiation resistance. Sex, etc., known as the "King of Rubber". It is widely used in automobile manufacturing, petrochemical, machinery manufacturing, aerospace, construction engineering and other fields. [0003] Vinylidene fluoride-hexafluoropropylene (VDF-HFP), vinylidene fluoride-chlorotrifluoroethylene (VDF-CTFE), vinylidene fluoride-hexafluoropropylene-tetrafluoroethylene (VDF-HFP-TFE), tetrafluoroethylene Fluoroethylene (TFE)-perfluoro(alkyl vinyl ether) or the above-mentioned fluoroelastomers with...

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Problems solved by technology

[0004] Chinese patent CN 1702112A discloses a high-temperature steam-resistant, high-temperature-resistant fluororubber gasket, which is mainly used for plate heat exchanger seals that use high-temperature steam to heat oil on oil production lines. After various additives, use F26 and HNBR glue to improve the water vapor resistance (about 180°C) performance of the gasket made of F26 rubber, but this method does not fundamentally change the high temperature and high pressure resistance of fluorine rubber, water performance of steam

[0005] Chinese patent CN 101307165A discloses a heat-resistant fluororubber composition and its vulcanized molded product. The invention refers to a fluororubber composition containing 100 parts by weight of fluororubber, 0.1-10 parts by weight of rare earth metal oxide and 0.05- 10 parts by weight of vulcanizing agent mainly refers to the excellent heat resistance of vulcanization molding, but does not mention the performance of water vapor resistance

[0006] So far, no fluororubber compound with improved water vapor resistance that can be widely used in high temperature and high pressure applications has been developed in the prior art

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