PC (polycarbonate)/PBT (polybutylene terephthalate) alloy material and preparation method thereof

Abstract

The invention provides a PC (polycarbonate) / PBT (polybutylene terephthalate) alloy material and a preparation method thereof. The PC / PBT alloy material comprises, by weight, 60-85 parts of PC, 10-35 parts of PBT, 10-30 parts of metallic pigments, 10-30 parts of antibacterial master batch, 0.1-1.0 part of coupling agents and 0.1-0.2 part of zinc stearate. The PC / PBT alloy material has super-high stereoscopic scintillation sense and designed high-unsaturated colors, metal effect after injection molding can reach paint spraying effect, so that processing cost and ecological environmental pollution caused by paint spraying are reduced, bacteria and mold on the surface of a plastic product can be rapidly prevented and killed by the antibacterial master batch, the problem of discoloration causedby excessive processing temperature in plastic processing is solved by the aid of safety and heat resistance of the antibacterial master batch, and the alloy material has a good application prospect.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to a PC / PBT alloy material and a preparation method thereof. Background technique [0002] PC (polycarbonate) / PBT (polybutylene terephthalate) alloy has good heat resistance, impact resistance and toughness, and is easy to process. It is an ideal material for manufacturing automotive fuel tank caps, handles, and radiator grilles. . However, while improving its anti-aging performance and heat resistance, the improvement of other aspects of the alloy is often ignored. For example, after the alloy is injected, the wear resistance of the metal surface is poor, the cost of painting is high, and it is easy to cause environmental pollution; the temperature may cause the material to change color during processing, etc., and there are certain problems at present. [0003] CN103351593A discloses a PC-PBT plastic alloy, which consists of the following components in parts by weight: 100 parts o...

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Problems solved by technology

The PC-PBT plastic alloy prepared by this method only solves the impact of anti-aging performance, and further painting is required, and the processing cost and environmental pollution are relatively high.

[0004] CN104710742A discloses a PC / PBT alloy with excellent comprehensive properties, its components are proportioned by mass percentage: PC resin 30%-60%, PBT resin 20%-40%, permanent antistatic agent 1%-3%, Halogen-free flame retardant masterbatch 2%~8%, nano calcium carbonate 5%~10%, aluminum titanium composite coupling agent 0.1%~0.5%, elastomer graft 3%~8%, triphenyl phosphite 0.1% % ~ 1%, compatibilizer 1% ~ 3%, antioxidant 0.1% ~ 0.5%, other additives 0 ~ 1.5%, the PC / PBT alloy prepared by this method has both the original PC and PBT At the same time of excellent performance, it has good antistatic performance and halogen-free flame retardant modification effect, and has good mechanical properties of impact strength, tensile strength and bending strength, and has the advantages of good processing fluidity, but the surface wear resistance is poor. Additional painting is required during injection molding, which increases processing costs

[0005] CN105086409A discloses an antistatic antibacterial PC / PBT alloy and a preparation method thereof, by combining PC, PBT and MWCNT-g-SiC-NH 2 ‐g‐PBT masterbatch is obtained by melt blending, in which: MWCNT‐g‐SiC‐NH 2 ‐g‐PBT masterbatches were mixed with MWCNT‐g‐SiC‐NH 2 , DBTO and PBT graft copolymerization, the PC / PBT alloy prepared by this method has antistatic, antibacterial, temperature resistance, high hardness and wear resistance, but the alloy prepared by this method can not directly form the spray paint effect after injection molding

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