A kind of low internal stress heat-resistant ABS resin and preparation method thereof

Abstract

The invention provides low-internal-stress heat-resistant ABS resin and a preparation method and application thereof and belongs to the technical field of modified resin. The low-internal-stress heat-resistant ABS resin is prepared from, by weight, 20-40 parts of ABS rubber powder, 2-10 parts of low-molecular-weight SAN resin, 42-77 parts of high-acrylonitrile-content SAN resin, 1-8 parts of a heat resistant agent, 0.1-1 part of an antioxidant, 0.1-1 part of a lubricant and 0.1-1 part of a weather resistance agent according to a formula. Compared with the prior art, the prepared low-internal-stress heat-resistant ABS resin greatly improves the liquidity of a material on the basis that heat resistance and impact are guaranteed, can obviously reduces the internal gravity in the injection molding process and can be applied to interior decorative parts and exterior decorative painted parts of automobiles.

Description

technical field [0001] The invention relates to a modified resin, in particular to a heat-resistant ABS resin with low internal stress and a preparation method thereof. Background technique [0002] Acrylonitrile-butadiene-styrene terpolymer (ABS) is a common general-purpose resin. ABS has excellent characteristics such as high toughness, easy processing, and easy coloring. Its comprehensive performance is good, and it is widely used in automobiles, electronics, military, machinery and other industries. With the development of modern technology, the demand for ABS is also growing rapidly, especially in the automotive industry. With the increase in car sales, the amount of ABS is also increasing. [0003] ABS for automobiles is generally used for plastic parts for interior and exterior decoration of automobiles. The interior decoration has high requirements on the heat resistance of materials. According to the material standards of various OEMs, the Vicat softening point is ...

AI Technical Summary

Problems solved by technology

CN1126734A discloses the method that adopts maleimide modification to prepare heat-resistant ABS resin, and this method now uses a kind of maleimide copolymer, a kind of ABS graft copolymer and a kind of AS copolymer to make heat-resistant Masterbatch, further blending heat-resistant masterbatch with ABS and AS to prepare heat-resistant ABS resin, the heat resistance of the resin has been significantly improved, but the fluidity has been significantly reduced

The reduction of fluidity will lead to a large residual internal stress in the injection molding process. The existence of internal stress will cause deformation of the part in the subsequent heat storage test, dimensional deviation in the assembly process, and in the process of painting. The problem of paint absorption, a series of problems such as poor electroplating during the electroplating process

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