EVA (ethylene-vinyl acetate) copolymer and preparation method thereof

Abstract

The invention discloses an EVA copolymer and a preparation method thereof, wherein the EVA copolymer comprises the following components by weight percentage: 50-70% of EVA particles, 10-30% of phenolic resin, and 10-30% of methyl acrylate. 50%, ammonia water 1-10%, cellulose 5-20%, calcium carbonate 5-20%, magnesium carbonate 5-20%, color paste 0-3.8%, emulsifier 3-9%, coupling agent 0-0.5% %, 0.5-5% accelerator, 1-5% preservative, 20-40% deionized water, the EVA copolymer prepared by the present invention has high melt tension and very low probability of gel or fisheye formation EVA copolymer . The crosslinked EVA copolymer thus obtained can be used as a raw material for shoe soles and electric wires.

Description

technical field [0001] The invention belongs to the field of fine chemicals, in particular to an EVA copolymer and a preparation method thereof. Background technique [0002] In order to form a stable and good foam, the EVA copolymer resin used in the foam should have optimum melt tension and melt index (MI). Among EVA resins, resins with higher vinyl acetate (VA) content generally enable highly stretchable foam products. However, the higher the VA content, the more difficult it is to obtain products with high melt tension or low MI. In order to reduce the MI of EVA copolymer resins containing high VA content while increasing the melt tension, various treatments can be tried. In the case where the EVA copolymer resin is used for foams, it is more preferable to use an organic peroxide to reduce the MI of the EVA copolymer resin by crosslinking, rather than crosslinking by radiation or using a compound with Cross-linking by copolymerization of monomers with double bonds red...

AI Technical Summary

Problems solved by technology

However, direct crosslinking with organic peroxides has several disadvantages when applied to films or wires

[0003] Among them, in the invention patent in China, the authorized announcement number is CN 102382353 B, which provides the application of EVA materials in the production of road cones, but it cannot be used as raw materials for shoe soles and wires

And in the Chinese invention patent, the application number is 201410336944.6, which provides an improved EVA, which has the advantages of high temperature resistance, corrosion resistance and non-toxicity, but it cannot be used as raw material for shoe soles and wires