High rigidity weather resistant pbt/asa alloy

Abstract

The invention relates to a high-rigidity weather-proof PBT / ASA alloy, and belongs to the technical field of high polymer materials. The PBT / ASA alloy comprises the following components in parts by weight: 40-50 parts of PBT (polybutylece terephthalate) resin, 10-20 parts of ASA (acrylonitrile styrene acrylate copolymer), 30-45 parts of high-strength short polyester glass fiber, 0.01-0.1 part of a metal deactivator, 0.5-2 parts of nano-ZnS, 0.02-0.05 part of an antioxygen 1010; 0.02-0.05 part of an antioxygen 168, 0.5-2 parts of a heat stabilizer, 1-3 parts of a toughening compatilizer and 0.5-2 parts of a lubricant. The PBT / ASA alloy has excellent mechanical properties, and has the characteristics of being high-rigidity and weather-proof.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, in particular to a heat-resistant and aging-resistant high-performance engineering composite material used in conjunction with metal parts. Background technique [0002] PBT is one of the most commonly used engineering thermoplastic materials. It is a semi-crystalline material with very good chemical stability, mechanical strength, electrical insulation properties and thermal stability, and has very weak hygroscopicity. However, PBT has the disadvantages of low notched impact strength and large molding shrinkage. [0003] ASA is an acrylonitrile-acrylate-styrene terpolymer, which is an engineering plastic developed for the disadvantage of ABS's poor weather resistance. It has good weather resistance, even if it is exposed to outdoor ultraviolet rays, humidity, rain, light and ozone for a long time, it can maintain stable physical properties without painting. Especially suitable for di...

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Problems solved by technology

[0004] Conventional PBT / ASA has poor rigidity, and generally adds 10-20% glass fiber, which has poor rigidity and cannot be used as a structural or load-bearing material in a special environment.

[0005] Conventional PBT / ASA will accelerate the decomposition of plastics under continuous high temperature or high humidity conditions, resulting in material performance degradation and poor weather resistance stability

[0006] When conventional PBT / ASA is used in contact with metal, especially copper, it will accelerate the decomposition of plastic due to the influence of metal ions, resulting in a decrease in material performance and poor weather resistance stability

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