High-impact high-flame-retardant weather-resistant PBT/PC alloy material

Abstract

The invention discloses a weather-resistant PBT / PC alloy material with high impact resistance and high flame retardance and a preparation method thereof, and relates to the technical field of polymer composite material processing. The material is prepared from the following raw materials in parts by weight: 30 to 70 parts of polybutylene terephthalate, 10 to 28 parts of polycarbonate, 10 to 20 parts of weather-resistant master batch, 5 to 16 parts of a composite toughening agent, 0.1 to 1.0 part of a composite antioxidant, 0.3 to 3 parts of a lubricant, 2 to 8 parts of antimony trioxide, 5 to 15 parts of a flame retardant, 0.5 to 5 parts of titanium dioxide, 0.1 to 0.5 part of anhydrous sodium dihydrogen phosphate, 0.1 to 0.5 part of polytetrafluoroethylene and 0.1 to 3 parts of an ultraviolet light absorber. The environment-friendly PBT / PC alloy material provided by the invention can be suitable for outdoor weather conditions, that is, under the conditions of strong ultraviolet rays, high temperature and high humidity or low-temperature freezing, the environment-friendly PBT / PC alloy material still has long anti-aging time, high flowability, high impact resistance and high flame retardance, and can meet product requirements under any weather conditions.

Description

Technical field [0001] The present invention belongs to the field of high molecular composite materials, and more particularly to a PBT / PC alloy material having high resistance to high flame retardant weathering and a preparation method thereof. Background technique [0002] Polyethylene terephthalate (PBT), one of the five general engineering plastics in the world, is a milky white translucent to opaque crystalline thermoplastic polyester, high resistance, toughness, fatigue resistance, self Lubrication, low friction coefficient, low water absorption and only 0.1%, still maintain various physical properties (including electrical properties) in a humid environment, and excellent electrical insulation. However, the pBT has a low impact strength, large forming shrinkage, and the product is prone to warp, which is susceptible to halogenated hydrocarbon. It can be quickly crystallized at low temperatures, and the water stability is easily decomposed. [0003] Polycarbonate (PC) is ...

AI Technical Summary

Problems solved by technology

However, the notched impact strength of PBT is low, the molding shrinkage rate is large, the product is prone to warping, and is easily corroded by halogenated hydrocarbons. It can crystallize rapidly at low temperature, has poor stability to water, and is easy to decompose when encountering water.

[0003] Polycarbonate (PC) is a high molecular polymer containing carbonate groups in the molecular chain. It has high toughness, good heat resistance and impact resistance. Its main disadvantages are: poor fluidity, difficult processing, and prone to stress Cracking, easy to wear, poor chemical resistance, insufficient hydrolysis stability, sensitive to notches, organic chemical resistance, poor scratch resistance, yellowing when exposed to ultraviolet light for a long time

[0004] At present, the helmets, hard hats and electric energy meter shells / boxes that have been exposed to outdoor weather conditions for a long time in the market have always been made of ABS. ABS has poor heat resistance and weather resistance, and its mechanical properties are not ideal. Fading and cracking are prone to occur in wet environment, and its safety decreases rapidly

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