ABS resin with high dimensional stability and preparation method thereof

Abstract

The invention relates to ABS resin with high dimensional stability and a preparation method thereof. The ABS resin is prepared from the following components in parts by weight: 40 to 60 parts of ABS resin, 10 to 18 parts of ABS high rubber powder, 25 to 45 parts of highly branched styrene-acrylonitrile copolymer, 0 to 2 parts of a heat-resisting agent, 10 to 20 parts of a toughening agent and 0.5to 5 parts of an auxiliary agent. Compared with the prior art, the ABS resin with a high precision shrinkage rate is obtained by controlling the content of the high rubber powder ABS and introducing the highly branched SAN and the toughening agent, so that the ABS can be used in structural parts with high requirements on the shrinkage rate, such as automobiles, household appliances and the like, and has a wide market application prospect.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to an ABS resin with high dimensional stability and a preparation method thereof. Background technique [0002] ABS plastic is a widely used general-purpose thermoplastic, which is synthesized from acrylonitrile, butadiene and styrene as main components. Most of the ABS parts are formed by injection molding, which involves the design of injection molds. The design of injection molds is generally based on the plastic shrinkage rate to design the size of the plastic cavity, but the general plastic is affected by the type of plastic, modification method, mold structure, and process conditions. The size changes greatly, that is, the plastic shrinkage rate changes greatly. Large, and some even reach 6% change, which cannot provide a good reference for mold design. [0003] With the increasing technical level requirements for modified ABS in the automobile, home appliance and other indu...

AI Technical Summary

Problems solved by technology

The design of injection molds is generally based on the plastic shrinkage rate to design the size of the plastic cavity, but the general plastic is affected by the type of plastic, modification method, mold structure, and process conditions. The size changes greatly, that is, the plastic shrinkage rate changes greatly. Large, some even reach 6% change, which can not provide a good reference for mold design

[0003] With the increasing technical level requirements for modified ABS in the automobile, home appliance and other industries, high requirements are also placed on the dimensional stability of ABS. Usually, the shrinkage rate of pure ABS of injection molding grade is 0.3-0.6%, and the shrinkage rate range When applied to small parts, it has little effect on the size of the part, but for some parts with high precision requirements or large sizes, the shrinkage range still cannot meet the requirements, and a higher precision shrinkage range is required, that is, the size ABS resin with better stability

It is very difficult to maintain the high dimensional stability of ABS while maintaining high fluidity, good toughness and excellent appearance.