Spraying-free polybutylene terephthalate fiber-added composite material and preparation method thereof

Abstract

The invention provides a spraying-free polybutylene terephthalate fiber-added composite material and a preparation method thereof. The spraying-free polycarbonate fiber-added composite material is prepared from the following raw materials in percentage by weight: 59-85 percent of polybutylene terephthalate, 10-30 percent of glass fiber, 0.2-1 percent of hyperbranched polyester copolymer, 3-8 percent of toughening agent, 0.1-0.5 percent of antioxidant, 0.5-1.5 percent of lubricating agent and 0.1-0.5 percent of anti-UV (Ultraviolet) agent. The hyperbranched polyester copolymer is a copolymer ofcarboxyl-containing hyperbranched polyester acrylate and glycidyl methacrylate; The carboxyl-containing hyperbranched polyester acrylate is obtained by modifying hyperbranched polyester with butanedioic anhydride, hexamethylene diisocyanate and hydroxyethyl acrylate. The spraying-free polybutylene terephthalate fiber-added composite material has the advantages of low floating fiber on the surface, high gloss, high hardness, excellent mechanical properties, excellent heat resistance and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, in particular to a spray-free polybutylene terephthalate fiber-reinforced composite material and a preparation method thereof. Background technique [0002] Glass fiber reinforced polybutylene terephthalate composite materials are widely used in lamps housings, hair straightener handles and other products due to their good mechanical properties, temperature resistance and chemical resistance. Usually, after the glass fiber reinforced polybutylene terephthalate composite material is injection molded, the plastic on the surface of the part is sprayed to make up for the lack of floating fibers on the surface of the product and low surface hardness. In recent years, with the introduction of spray-free materials, compared with traditional plastic materials, spray-free materials have the advantages of rich colors, good surface gloss, good chemical resistance, more environmental prot...

AI Technical Summary

Problems solved by technology

[0003] At present, there are still some problems to be solved in the field of spray-free polybutylene terephthalate composite materials, especially the problem of floating fibers on the surface and the problem of poor surface gloss

Existing research generally uses the following two methods to improve the above problems: 1. Reduce the amount of glass fiber added, which will lead to a great reduction in the comprehensive mechanical properties, temperature resistance, and chemical resistance of such products; 2. Add a compatibilizer, and most of the compatibilizers are grafts of maleic anhydride. Since the surface activity of these compatibilizers is not high, if the addition amount is small, the compatibilization effect is limited and the surface floating fiber cannot be improved; if the addition amount If it is too large, it will not only destroy the overall mechanical properties and temperature resistance of the composite material, but also make the processing performance of the material worse.

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