Anti-ultraviolet halogen-free flame-retardant PC/ABS (polycarbonate/acrylonitrile butadiene styrene) alloy and method for preparing same

Abstract

The invention discloses anti-ultraviolet halogen-free flame-retardant PC / ABS (polycarbonate / acrylonitrile butadiene styrene) alloy and a method for preparing the same. The anti-ultraviolet halogen-free flame-retardant PC / ABS alloy comprises, by weight, 30-55 parts of polycarbonate, 20-45 parts of ABS resin, 1-15 parts of halogen-free flame retardants, 3-8 parts of toughening agents, 2-5 parts of compatibilizers, 0.3-2 parts of light stabilizers, 0.5-5 parts of nano-metal oxide, 0.3-1 part of antioxidants and 0.3-0.5 part of lubricants. The method includes 1), adding various raw materials intoa high-speed stirring machine and uniformly mixing the various raw materials with one another; 2), adding materials obtained at the step 1) into a twin-screw extruder and carrying out extruding, rinsing drawing, grain-sized dicing and drying. The anti-ultraviolet halogen-free flame-retardant PC / ABS alloy and the method have the advantages that the anti-ultraviolet halogen-free flame-retardant PC / ABS alloy is excellent in anti-ultraviolet ability, ageing resistance, flame-retardant property and comprehensive performance and high in impact strength, processes for preparing the anti-ultraviolet halogen-free flame-retardant PC / ABS alloy are simple, and large-scale industrial production can be facilitated.

Description

technical field [0001] The invention relates to an ultraviolet-resistant halogen-free flame-retardant PC / ABS alloy and a preparation method thereof, belonging to the technical field of flame-retardant composite materials. Background technique [0002] PC / ABS material is a polymer alloy material with excellent comprehensive properties, which combines the hardness, mechanical strength, high heat distortion temperature of polycarbonate and the good processability and formability of ABS. PC / ABS alloy is an alloy material that has been widely used in recent years. This material solves the problems of high melt strength and easy stress cracking of products in PC materials, and at the same time improves the hardness and impact of ABS. strength and heat deflection temperature. However, the poor UV aging resistance of PC / ABS alloys severely limits its application in the outdoor field, especially in the application of automotive exterior materials. The content of PC has a great infl...

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Problems solved by technology

[0004] CN 101168614A discloses a flame-retardant and anti-ultraviolet PC / ABS composition, which mainly adds benzotriazole ultraviolet absorbers and hindered amine light stabilizers, and adds rutile titanium dioxide as a light shielding agent to achieve Anti-ultraviolet light performance, but the hindered amine ultraviolet absorber has weak alkalinity, it is easy to cause PC to decompose in the process of high temperature and high humidity processing, resulting in the deterioration of various properties of the material

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