High notched impact PA/ASA alloy material and its preparation method

Abstract

The invention discloses a high notched impact PA / ASA alloy material and its preparation method. The high notched impact PA / ASA alloy material comprises the following components of: by weight, 30-90 parts of PA, 20-80 parts of ASA, 3-15 parts of a compatilizer, 3-20 parts of a flexibilizer, 0.2-0.5 part of a lubricant, 0.2-1 part of an anti-oxidant. The raw materials are weighed according to the above proportion and are mixed and extruded by a double screw extruder to prepare the PA / ASA alloy. Similar to PA / ABS, the prepared PA / ASA has good impact strength, good thermal stability and more excellent dimensional stability than PA. As ASA is used to replace ABS, PA / ASA has better weatherability and chemical resistance than PA / ABS. Due to self-lubricating property of PA, PA / ASA has better wear resistance than PC / ASA. The PA crystal material and the ASA amorphous material are mixed to possess good noise abatement and damping performance. The preparation method provided by the invention is used to greatly raise the notched impact strength of alloy without influencing processing performance and other mechanical properties, and is suitable for products which have high requirements on toughness. The product provided by the invention is an excellent substitutive material in the fields of automobile, electronics and electricity and the like.

Description

technical field [0001] The invention discloses a high notch impact PA / ASA alloy material and a preparation method thereof. Background technique [0002] Since PA is a polymer with crystallinity, strong polarity and low melt strength, and ASA is a polymer with non-crystallization and weak polarity, the solubility parameters of the two are quite different, which belongs to thermodynamic incompatibility. Compatibility, simple blending leads to high interfacial tension between the two phases, resulting in poor mechanical properties. [0003] ASA resin is a melt blend of ASA (Acrylate-Styrene-Acrylonitrile) graft copolymer and styrene-acrylonitrile copolymer (SAN resin). Compared with ABS, due to the introduction of acrylate rubber without double bonds to replace butadiene rubber, the weather resistance has been substantially improved, which is about 10 times higher than that of ABS; while other mechanical properties, processing properties, electrical insulation, Chemical resis...

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Problems solved by technology

Only a small number of ABS manufacturers in the world produce ASA at the same time. The reason is that although the manufacturing process has obvious similarities, there are also significant differences in synthesis. Foreign products are produced outside China, and the core production technology is only mastered by a few foreign countries. In the hands of large chemical companies, such as Germany's BASF and Saudi Basic Industries Corporation (formerly GE Plastics in the United States)

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