ABS (acrylonitrile butadiene styrene)/PBT (polybutylene terephthalate)/PCTG (polyethylene terephthalate glycol) composite material high in low-temperature toughness and solvent resistance and preparation method thereof

Abstract

The invention discloses an ABS (acrylonitrile butadiene styrene) / PBT (polybutylene terephthalate) / PCTG (polyethylene terephthalate glycol) composite material high in low-temperature toughness and solvent resistance. The shortcoming that ABS resin is poor in solvent resistance is overcome by introduction of PBT resin from the composite material; low-temperature falling ball impact of the composite material is greatly increased by introduction of PCTG resin, and problems about increasing density, solvent resistance performance degradation and the like due to the fact that existing PC is taken as third-component polyester are solved; a bulking agent is applied to the composite material, compatibility of the composite material can be more effectively improved especially by the adoption of an MGD comb-shaped polymer, and low-temperature falling ball toughness of the material is further improved; the composite material is good in solvent resistance, heat resistance and low-temperature falling ball performance, and strict requirements of kitchen appliances, industrial battery shells and the like can be met.

Description

technical field [0001] The invention relates to an ABS modified composite material and a preparation method thereof, in particular to an ABS / PBT / PCTG composite material with strong low-temperature toughness and solvent resistance and a preparation method thereof, belonging to the technical field of polymer composite materials and processing thereof. Background technique [0002] ABS (acrylonitrile-butadiene-styrene) resin has the advantages of high rigidity of acrylonitrile, good heat resistance, excellent toughness of butadiene and good gloss of styrene, high processing fluidity, and is widely used in electronics, electrical appliances, automobiles , textile equipment, construction and daily necessities, etc. However, the solvent resistance of ABS resin itself is poor, which leads to the problem of solvent cracking when it is used in many products such as kitchen appliances and battery material shells. PBT (polybutylene terephthalate) resin is a kind of crystalline polyest...

AI Technical Summary

Problems solved by technology

In the existing binary alloy technology, usually by adding a certain amount of PBT resin to the ABS resin, and adding a certain compatibilizer, an alloy with compatibility is prepared to solve the solvent resistance problem of the ABS resin, but it does not The low-temperature toughness and scratch resistance of the alloy are not considered, and its alloy products still have certain limitations

There are also reports on the low temperature of ABS / PCTG composites prepared from ABS and PCTG (polycondensed from three monomers of terephthalic acid, ethylene glycol and 1,4-cyclohexanedimethanol by transesterification). Compared with PCTG and ABS, the toughness is greatly improved, but the content of PCTG is too high, and there is no improvement in the solvent resistance of the composite material

In addition, there are technical reports using PC (polycarbonate) as the third component polyester to prepare ABS / PBT / PC composites, but the introduction of PC will have a negative impact on the solvent resistance of the ternary composite system, and PC material is more rigid, which will make the internal stress of the alloy higher, and the risk of stress cracking will occur

In summary, the existing composite material technology route cannot achieve excellent comprehensive properties such as good solvent resistance and low temperature toughness at the same time, and can be applied to the preparation of alloy materials for kitchen appliances such as dishwashers, industrial battery casings, etc.

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