Weather-resistant PC/polyester alloy material as well as preparation method and application thereof

Abstract

The invention provides a weather-resistant PC / polyester alloy material as well as a preparation method and application thereof. The weather-resistant PC / polyester alloy material comprises the following components: PC resin, PBT resin, a flexibilizer, an ester exchange inhibitor, an antioxidant, a lubricant, a light stabilizer and bis-eugenol-terminated polysiloxane. The flexibilizer is an organic silicon type flexibilizer, and the silicone rubber content of the organic silicon type flexibilizer is 50%-70%; and the PC resin is phosgene bisphenol A type polycarbonate. According to the weather-resistant PC / polyester alloy material disclosed by the invention, the bis-eugenol-terminated polysiloxane and the organic silicon type toughening agent with specific silicone rubber content are added, so that the weather-resistant PC / polyester alloy material not only has relatively high weather resistance, but also can improve the low-temperature impact property; the requirements of automobile exterior decoration dry-state (PV3929) and wet-state (PV3930) xenon lamp aging and cold-hot alternating experiments and fatigue experiments are met.

Description

technical field [0001] The invention relates to the technical field of polymer materials, and more particularly, to a weather-resistant PC / polyester alloy material and a preparation method and application thereof. Background technique [0002] Blending PC and PBT can achieve complementary performance on the one hand. It maintains the chemical resistance, high temperature resistance and easy forming properties of the crystalline material PBT, and has the toughness and dimensional stability of the amorphous material PC. However, due to the poor weather resistance of PC, it is easy to age and discolor, resulting in the general weather resistance of PC alloys. In addition, the molecular chain of PC and PBT will be broken during processing, resulting in active groups COOH, Ph-OH, R-OH, and the number of active carbonyl groups and hydroxyl groups will increase sharply. [0003] In order to improve the weather resistance of PC / PBT alloy materials, a lot of research has been done....

AI Technical Summary

Problems solved by technology

For example, the prior art discloses a light-resistant PC / PBT alloy material for automobiles, which discloses a synergistic effect between a triazine ultraviolet absorber and a benzotriazole light stabilizer to improve the PC / PBT alloy material. The light resistance, thermal stability and chemical resistance of the alloy material, but it only meets the PV1303 condition for the interior, and the weather resistance lasts for about 624 hours, and has not yet reached the PV3929 and PV3930 weather resistance conditions for the exterior

In addition, the prior art discloses a PC / PBT resin combination with high impact resistance and high weather resistance, which discloses the addition of a graft copolymer of POE and GMA as a polyester toughening agent to improve the PC / PBT heat and oxygen aging resistance problem, but It cannot meet the requirements of dry (PV3929) and wet (PV3930) xenon lamp aging, alternating heat and cold experiments and fatigue experiments of automobile exterior decoration.

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