A kind of low temperature resistant perfluoroether rubber and its synthesis method

A technology of perfluoroether rubber and synthesis method, which is applied in the field of polymer materials, can solve the problems of incapable of large-scale commercial production, slow polymerization speed, low reactivity of comonomers, etc., and achieve good chemical medium resistance and good vulcanization performance, easy operation
CN104530292BActive Publication Date: 2016-08-24ZHONGHAO CHENGUANG RES INST OF CHEMICALINDUSTRY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHONGHAO CHENGUANG RES INST OF CHEMICALINDUSTRY CO LTD
Publication Date
2016-08-24

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Abstract

The invention relates to a synthesis method of a low temperature-resistant perfluoroether rubber. The synthesis method comprises the following steps: 1) evenly mixing an emulsifier, fluoroether oil and water together and heating until 40 DEG C to form a microemulsion, and adding a comonomer A and a comonomer B to the microemulsion to obtain a mixed liquor; 2) adding deionized water and a pH regulator to a reaction kettle, adjusting the content of oxygen in the reaction kettle to be lower than 20ppm, increasing the temperature in the reaction kettle to the range of 70-120 DEG C, and adding the mixture of tetrafluoroethylene and perfluoromethyl vinyl ether to the reaction kettle; 3) adding the mixed liquor to the reaction kettle and adding the initiator potassium peroxodisulfate to start reacting, and adding a vulcanization point monomer and a chain transfer agent until the reaction ends, thereby obtaining a polymer; 4) performing electrolyte coagulation on the polymer and then washing, drying in vacuum and molding by plastifying to obtain the perfluoroether rubber. The synthesis method is simple to operate and mild in reaction conditions, and is capable of preparing the low-temperature-resistant perfluoroether rubber by adjusting the monomer structure.
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Description

technical field

[0001] The invention belongs to the field of polymer materials, and relates to a low-temperature-resistant perfluoroether rubber and a synthesis method thereof. Background technique

[0002] The commonly used monomers used in the production of perfluororubbers in the past ten years are tetrafluoroethylene (TFE) and perfluoromethyl vinyl ether (PMVE), and their glass transition temperature (Tg) generally can only reach 0 °C. Later application of other types of perfluoromonomers lowered the glass transition temperature to -17°C. Studies by Tatemoto et al. have shown that the glass transition temperature of TFE and CF2=CF-o-(CF2-CF(CF3))n-o-C3F7 (wherein N=1~3) high molecular copolymer is about -30 ℃, but the copolymerization single The low reactivity of the body and the slow polymerization rate make this material unable to be produced commercially in large quantities. Contents of the invention

[0003] Aiming at the defects of the prior art, the object of t...

Claims

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