High-glossiness low-odor high-low-temperature-toughness flame-retardant PC/ABS (polycarbonate/acrylonitrile-butadiene-styrene) composition

Abstract

The invention provides a high-glossiness low-odor high-low-temperature-toughness flame-retardant PC / ABS (polycarbonate / acrylonitrile-butadiene-styrene) composition which is prepared from the following raw materials in percentage by mass: 30-90% of PC, 5-25% of phosphorus-containing flame retardant and 5-50% of ABS-low-temperature toughening modifier one-step material, totaling 100%. The ABS-low-temperature toughening modifier one-step material is prepared from the following raw materials in percentage by mass: 50-80% of ABS and 20-50% of low-temperature toughening modifier. The selected ABS material and the produced ABS-low-temperature toughening modifier one-step material are proportionally mixed with the flame retardant and PC to perform modification in an extruder, thereby obviously improving the problems of the odor of the PC / ABS composition, the defects in the compacting process and the like.

Description

technical field [0001] The invention belongs to the field of polymer modification, and in particular relates to a flame-retardant PC / ABS composition with high gloss, low odor, high and low temperature toughness. Background technique [0002] Polycarbonate (PC) is a thermoplastic engineering plastic with excellent physical and mechanical properties. It has excellent transparency and flame retardancy, and has a wide range of applications; Stress cracking occurs, poor solvent resistance, and easy to decompose when exposed to water at high temperatures, which limit its application to a certain extent. Generally, through the modification technology, the processability and internal stress are improved by adding acrylonitrile-butadiene-styrene graft copolymer (ABS), and selecting the appropriate type of ABS can reduce the impact on the gloss of the material due to the addition of ABS. Influence; adding impact modifiers to improve the toughness of polycarbonate compositions, especi...

AI Technical Summary

Problems solved by technology

However, due to the introduction of dispersants or other additives during the synthesis of ABS and impact modifiers, after making a flame-retardant PC / ABS composition, due to the characteristics of the PC molecular structure, these small molecules are detrimental to material properties, such as injection molding The process produces material flowers, mold scale, etc.; at the same time, materials containing small molecules will emit unfriendly odors during use, which limits their applications to a large extent

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