Oil-resistant and easy-to-process fluorine-containing elastomer composition

Abstract

The invention discloses an oil-resistant and easy-to-process fluorine-containing elastomer composition which comprises the following components in parts by weight: 0.1-5 parts of high-fluorine alkyl ester, 100 parts of binary or multi-element fluorine rubber, 0-50 parts of filler, 1-5 parts of vulcanizing agent, 0.1-3 parts of accelerant, 4-25 parts of acid acceptor and 0.5-3 parts of internal release agent, the high fluorine alkyl ester is polyhexafluoropropylene oxide pentafluoromethyl propionate. The preparation method of the polyhexafluoropropylene oxide methyl pentafluoropropionate comprises the following step: carrying out reflux esterification dehydration reaction on polyhexafluoropropylene oxide monomethanol and pentafluoropropionic acid for 3-4 hours under the action of a catalyst phosphoric acid to obtain the polyhexafluoropropylene oxide methyl pentafluoropropionate. High-fluorine alkyl ester with medium and low molecular weight is added into the fluororubber, so that the fluororubber is softened, and the flowability, the demolding property and the roller separation property of the fluororubber are improved. The fluorine-containing elastomer has good solvent resistance, processing manufacturability, high temperature resistance, corrosion resistance and good mechanical strength.

Description

technical field [0001] The invention relates to an oil-resistant and easy-to-process fluorine-containing elastomer composition, belonging to the technical field of rubber materials. Background technique [0002] Due to its strong rigidity, fluororubber has problems such as sticking to molds and sticking rollers, and because fluororubber needs to be resistant to high temperature and oil, the traditional oil-filled rubber as a softener has problems such as high temperature resistance, oil resistance, and physical and mechanical properties. problem and not adopted. Usually, palm wax, organic wax or silicone polymer is added as an internal mold release agent and plasticizer. Too much addition will lead to a decline in physical and mechanical properties, and too little addition is not ideal. Especially, the rigidity of fluororubber requires The problem of being softened while maintaining good physical and mechanical properties is not well resolved. SUMMARY OF THE INVENTION ...

AI Technical Summary

Problems solved by technology

Usually palm wax, organic wax or silicone high molecular polymer is added as internal release agent and plasticizer. If the addition is too large, the physical and mechanical properties will be reduced. If the addition is too little, the effect is not ideal, especially for the high rigidity of fluororubber. The problem of being softened while maintaining good physical and mechanical properties is not well resolved

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