Formula for novel auxiliary agent capable of improving TPV

Abstract

The invention discloses a formula for a novel auxiliary agent capable of improving TPV. The formula comprises the following raw materials by weight: 60 to 70 parts of EPDM rubber, 14 to 16 parts of anethylene-vinyl acetate copolymer, 11 to 13 parts of polyethylene, 10 to 12 parts of chlorinated polyvinyl chloride, 7 to 9 parts of polypropylene, 5 to 7 parts of chitosan antibacterial microspheres,1 to 2 parts of a flame retardant, 2 to 3 parts of a cross-linking agent, 0.3 to 0.5 part of sulfur, 0.5 to 1 part of naphthenic oil, 0.2 to 0.4 part of an ultraviolet absorber and 0.3 to 0.5 part ofa lubricant. According to the formula provided by the invention, through addition of the ethylene-vinyl acetate copolymer, the processing technology of the TPV can be improved, and the TPV has stronger adaptability in the process of production; meanwhile, through addition of the polyethylene, the TPV after production can be greatly improved in modulus and is improved in the performance of poor compression deformation resistance, and the problems of difficult processing and poor modulus and compression deformation resistance of the TPV for a long time are solved; and the ethyl acetate end of the ethylene-vinyl acetate copolymer has good fusion effect with the polypropylene, so a softening effect is exerted on vulcanization of the EPDM rubber and the polypropylene.

Description

technical field [0001] The invention belongs to the technical field of TPV, and in particular relates to a new additive formula for improving TPV. Background technique [0002] Thermoplastic EPDM dynamically vulcanized elastomer (TPV) is a polymer elastomer material composed of highly vulcanized EPDM particles dispersed in continuous polypropylene PP phase. The physical properties and functions of TPV at room temperature are similar to those of thermosetting rubber. At high temperatures, they behave like thermoplastics, and can be processed quickly, economically and conveniently. TPV thermoplastic EPDM dynamically vulcanized elastomer / rubber The vulcanized rubber material is dynamically vulcanized to disperse EPDM in the polypropylene PP plastic matrix with particles less than 2 microns in size, and the properties of rubber and plastic are very good. Combined together, high-performance elastomer materials with excellent comprehensive properties are obtained. [0003] The m...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of new auxiliary agent formula that improves TPV, add the ethylene-vinyl acetate copolymer of scientific ratio in formula, can improve the processing technology of TPV, make the adaptability of TPV become stronger in the production process, simultaneously , the addition of polyethylene can greatly increase the modulus of postpartum TPV, and at the same time improve the performance of poor compression deformation resistance, and solve the long-standing problems of TPV difficult to process and poor modulus and compression deformation resistance; moreover, in terms of structure, ethylene -The fusion effect of the ethyl acetate end of the vinyl acetate copolymer and polypropylene is good, and it has a soft effect on the vulcanization of EPDM rubber and polypropylene. The performance of polyethylene is softer than that of polypropylene, so when adding After adding polyethylene, the modulus and compression deformation resistance of the product are significantly improved