Easy-to-spray high-rigidity alloy material and preparation method thereof

Abstract

The invention discloses an easy-to-spray high-rigidity alloy material and a preparation method thereof, and relates to the technical field of high polymer materials. The alloy material is prepared from the following components in parts by weight: 5 to 30 parts of aromatic polyester, 20 to 70 parts of polycarbonate, 5 to 30 parts of a styrene-acrylonitrile copolymer, 2 to 8 parts of a flexibilizer, 10 to 30 parts of a filler, 0.5 to 2 parts of a heat stabilizer, 1 part of a coloring agent, 0.4 to 1 part of an antioxidant, 0.2 to 0.5 part of a lubricant and 0.1 to 0.5 part of an ester exchange inhibitor. The easy-to-spray high-rigidity alloy composition provided by the invention has the characteristics of high flowability, high rigidity, good dimensional stability, low linear expansion coefficient, corrosion resistance and easy spraying; the alloy material is especially suitable for replacing a metal material to be applied to the field of interior and exterior decoration coating with high strength requirements, such as skylight decoration strips, and also has a good application effect in the field of frameworks with high requirements for material rigidity and dimensional stability.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to an easy-to-spray high-rigidity alloy material and a preparation method thereof. Background technique [0002] PC / ABS is a mixture of polycarbonate and acrylonitrile-butadiene-styrene copolymer. It takes into account the advantages of both PC and ABS. Compared with ordinary materials, it has excellent mechanical properties and can be widely used in automotive interior and exterior parts. Components, 5G communications, household appliances and other fields. Especially in recent years, with the popularization of automobiles and home appliances, the application of PC / ABS alloy materials in the above fields has been continuously improved, and good results have been achieved. However, due to the defects in corrosion resistance of PC / ABS alloy materials and the limitation of processing fluidity, in the field of spraying with complex structures, there are still glu...

AI Technical Summary

Problems solved by technology

However, due to the defects in corrosion resistance of PC / ABS alloy materials and the limitation of processing fluidity, in the field of spraying with complex structures, there are still glue shortages in injection molding, paint bite, pinholes, stress cracking, and fluctuations in the gap between metal assemblies, etc. Appearance and use defects

In the application field of replacing steel with plastic, it often shows rigidity defects. In many cases, due to the lack of rigidity of the material, the wall thickness design has to be increased in the structural design stage, which will not only increase the cost but also affect the structure. design creates additional constraints

In addition, it is necessary to consider the risk of the change of the assembly surface difference in the extremely cold and extremely hot environment.

[0003] The PC / PET and PC / PBT alloys that have been widely used have good impact and heat resistance, and excellent chemical resistance, but due to the presence of residual Ti catalysts in the synthesis process of PBT or PET, the addition of too much The transesterification reaction in the production and processing process cannot be completely avoided. For complex structures, there are usually problems such as shear resistance and high temperature silver wires in practical applications. At the same time, there are also defects such as rigidity and dimensional instability, especially when the PET content of PC / PET alloys is high. When it is high, due to the limitation of the crystallization speed and degree, it often shows defects such as drawing die, part collapse and deformation, which seriously affects the normal production and assembly use effect of the product.

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