PBT material with high flow, fine finish and no basecoat and preparation method thereof

Abstract

The invention belongs to the field of macromolecule composites and relates to a PBT material with high flow, fine finish and non-basecoat and the preparation method thereof. The PBT material of the invention comprises the following constituents: 88 to 98 parts of PBT; 1 to 5 parts of nucleation a agent; 0.5 to 4 parts of a lubricant; 0.1 to 3 parts of a antioxidant; 0.05 to 0.1 parts of a meso-material. The preparation method comprises the steps of, putting all raw materials into a twin-screw machine after 10 to 15 min of mixing in a high speed mixer; performing melt extrusion and granulation. The twin-screw machine is divided into 10 zones from a feeding inlet to a head. The PBT material of the invention has a detailed uniform micro spherulite structure and a good surface finish. An injection molding blank obtained by the PBT material can be directly aluminized in vacuum and can solve the problem of severe micromolecule migration to the aluminum layer of non-basecoat PBT material when used in high temperature. The material has strong mold reproduction capability and the obtained products are more delightful.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, and relates to a polymer modified polybutylene terephthalate (hereinafter referred to as PBT) material and a preparation method of the material, in particular to a high fluidity, high smoothness and bottom-free PBT-coated material and its preparation method. Background technique [0002] PBT has excellent properties such as high heat resistance, toughness, fatigue resistance, self-lubrication, low friction coefficient, weather resistance, and low water absorption. Currently, it is widely used in electronic appliances, auto parts, machinery, household products, etc. In terms of automotive interior parts, pure PBT material injection molding rough parts have average brightness and defects such as air spots, and the surface layer of the material must be coated with a primer before it can be aluminum-plated to produce bright parts. On the one hand, the application of primer solvent adds a p...

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Problems solved by technology

[0003] Modified plastic factories and research institutes at home and abroad have made a lot of efforts to develop PBT materials with excellent performance in all aspects, but they have ignored the fact that primerless PBT materials are easy to migrate to the aluminum layer when using small molecular materials in high temperature environments. Cause problems such as decreased gloss, fogging or multicolored aluminum layer surface

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