Polycarbonate composition and preparation method thereof

Abstract

The invention discloses a polycarbonate composition. The polycarbonate composition comprises the following components including, by weight, a, 29.9-79.9 parts of polycarbonate, b, 8.1-50.1 parts of a graft polymer, c, 4.8-24.8 parts of a fire retardant and d, 0-9.9 parts of other auxiliaries; the sum of the parts by weight of the four components including the a, the b, the c and the d is 100 parts, and the composition is based on the fact that the content of phosphorus oxychloride in the total weight of the polycarbonate composition is less than or equal to 80 ppm and lager than or equal to 0.1 ppm. According to the polycarbonate composition, in the polycarbonate composition formula, on the basis that when the content of the tested phosphorus oxychloride in the total weight of the polycarbonate composition does not exceed 80 ppm, the generation of stable compounds such as phosphoric acid and polymetaphosphate is facilitated by the trace level reserved phosphorus oxychloride, the generation of carbon layers is further promoted, meanwhile, the dispersing of phosphorus containing the fire retardant in the composition is improved, finally, the fire resistance and the melt stability of the polycarbonate composition can be evidently improved, and in addition, the polycarbonate composition is particularly suitable for occasions with high using environment requirements.

Description

technical field [0001] The invention relates to the technical field of engineering plastics, in particular to a polycarbonate composition and a preparation method thereof. Background technique [0002] Polycarbonate PC has high impact resistance and heat resistance. In order to improve its processing performance and the shortcomings of notch impact sensitivity, it is usually possible to add rubber modified polymers, such as ABS, MBS, ACR and silicone rubber. , especially the PC / ABS alloy with PC and ABS as the main raw materials is an important engineering plastic. On the one hand, it can improve the heat resistance and tensile strength of ABS, and on the other hand, it can reduce the viscosity of PC melt and improve processing performance. , to reduce the sensitivity of product internal stress and impact strength to product thickness. PC / ABS materials are widely used in various fields such as automobiles, machinery and home appliances. In many occasions, flame retardant ...

AI Technical Summary

Problems solved by technology

[0005] So far, there is no report about the impact of the content of phosphorus oxychloride on the flame retardancy and melt stability of the polycarbonate composition