Crosslinking sensitizer for fluorine-containing polymer

Abstract

The invention discloses a crosslinking sensitizer for a fluorine-containing polymer. The crosslinking sensitizer is characterized by being formed by mixing a component A and a component B according to the mass ratio of 1 to 0.1-10; the component A conforms to the structural formula (1) (please see the formula in the specifications), wherein X represents vinyl or allyl or methylallyl or propargyl, n ranges from 2 to 15, and the weight-average molecular weight of X ranges from 600 to 5000; the component B is at least one of triallyl isocyanate, trimethyl allyl isocyanate, triallyl cyanate and trimethyl allyl cyanate. At a machining temperature, the fluorine-containing polymer is not prone to self-polymerization, low in volatility and not prone to volatilization or self-polymerization, and product stability can be improved; it is found in the machining process that a sample of the crosslinking sensitizer is small in smoke amount, white and luster in color, free of after-radiation color changes and quite high in product stability in the use process.

Description

Technical field [0001] The present invention relates to the technical field of cross-linking sensitizers, in particular to cross-linking sensitizers for fluoropolymers. Background technique [0002] The crosslinking and degradation of fluorine-containing polymers occur simultaneously under radiation, and a crosslinking sensitizer must be added to obtain a high degree of crosslinking at room temperature. At present, the crosslinking sensitizers used in fluoropolymers are mainly triallyl isocyanate (TAIC), triallyl cyanate (TAC) and so on. However, because the processing temperature of fluoropolymers is basically above 200°C, and TAIC and TAC have low melting points, they are very volatile at the processing temperature of fluoropolymers, or have self-polymerized, so that a large amount of Toxic fumes, and will affect product stability. [0003] Therefore, it is very worthwhile for those skilled in the art to provide a radiation crosslinking sensitizer that is not easy to self-polym...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a crosslinking sensitizer for fluorine-containing polymers, which solves the problem of current crosslinking sensitizers for fluorine-containing polymers in fluorine-containing The polymer is easy to self-polymerize and volatile at the processing temperature, producing a large amount of toxic smoke and poor product stability. The fluoropolymer is not easy to self-polymerize at the processing temperature and has low volatility, which can improve product stability. It is not easy to volatilize and is not easy Self-polymerization, and found in the process of processing, the sample using the cross-linking sensitizer of the present invention has a small amount of smoke, the color of the sample is white, does not change color after irradiation, and the product stability is very good

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