High-heat resistance and high-toughness polycarbonate composition and preparation method thereof

Abstract

The invention discloses a high-heat resistance and high-toughness polycarbonate composition and a preparation method thereof. The composition comprises, by weight, 60-90 parts of polycarbonate, 1-20 parts of a butadiene copolymer, 5-25 parts of a phosphate ester homopolymer, 0-8 parts of a flexibilizer and 0-9.6 parts of other assistants, and the quantity sum of weight parts of all above components is 100. Compared with the prior art, the preparation method has the following advantages: addition of the phosphate ester homopolymer to the raw material formula well overcomes an abuse that present organophosphate flame retardant greatly reduces the heat deformation temperature and the toughness of polycarbonate, effectively improves the heat resistance and the toughness of the polycarbonate composition, has a very good flame retardation effect, and effectively improves the flame retardation grade of the polycarbonate composition; and the phosphate ester homopolymer has extremely good compatibility with polycarbonate, has no plasticizing effect on alloy, and obviously improves the heat resistance of the polycarbonate composition without influencing the flame retardation grade or the toughness of the polycarbonate composition.

Description

technical field [0001] The invention relates to the technical field of engineering plastics, in particular to a polycarbonate composition with high heat resistance and high toughness and a preparation method thereof. Background technique [0002] Polycarbonate PC has the advantages of high impact resistance, heat resistance, good dimensional stability, electrical insulation performance, etc., but at the same time, PC has the disadvantages of being sensitive to notches and poor processing performance. In order to improve these defects, rubber modified polymers can usually be added, especially the PC / ABS alloy with PC and ABS as the main raw material is an important engineering plastic, which can not only improve the heat resistance and tensile strength of ABS, but also It can reduce the viscosity of PC melt, improve processing performance, and reduce the sensitivity of product internal stress and impact strength to product thickness. [0003] In addition, in order to meet th...

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Problems solved by technology

Therefore, the application of aromatic phosphate flame retardants has been greatly limited

[0004] Chinese patent CN104583316 discloses a method for manufacturing a flame-retardant, high-heat-resistant, high-toughness polycarbonate composition. It uses PC with a special structure and adds a phosphazene flame retardant to improve the high-heat-resistant, high-toughness polycarbonate composition. The heat distortion temperature of the material, but the special structure of PC largely limits the large-area application of this method, and the high price of phosphazene flame retardant also limits the application of this method

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