A kind of heat-resistant ABS resin with excellent blow molding surface and preparation method thereof

Abstract

The invention relates to a heat-resisting ABS (Acrylonitrile Butadiene Styrene) resin with an excellent blow-molded surface and a preparation method of the heat-resisting ABS resin. The heat-resisting ABS resin comprises the following components in parts by weight: 20-80 parts of ABS rubber powder, 20-80 parts of AS (Acrylonitrile Styrene) resin, 1-20 parts of melt reinforcing agent, 5-25 part of heat-resisting agent and 0.1-1 part of antioxygen. The preparation method comprises the following steps: a, the raw materials are put in a high-speed mixer to be mixed for 5-30 min and then are discharged to obtain a mixture; b, the mixture is extruded and pelletized through a double-screw extruder, wherein the temperature of the extruder is 180-250 DEG C, the degree of vacuum is strictly controlled to be greater than 0.09 Mpa, and the rotational speeds of screws are 180-600 turns per minute the heat-resisting ABS resin prepared by the invention is used for blow molding, has the extremely excellent blow-molded surface, higher melt strength and heat-resisting quality and a favorable impact property and is especially suitable for blow molding of an automobile tail wing of which the postprocessing is paint spraying.

Description

technical field [0001] The invention relates to a modified resin, in particular to a heat-resistant ABS resin with an excellent blow molding surface and a preparation method thereof. Background technique [0002] Styrene-acrylonitrile-butadiene copolymer (ABS) has been widely used in the electrical and electronic and automotive industries due to its good impact resistance, heat resistance, chemical resistance and dimensional stability. In the field of auto parts, blow-molded tail fins are generally post-processed with a painting process, and are required to be placed in an environment of 95-105°C for 24-168h without deformation. The heat-resistant ABS resin used for this kind of parts must have good Excellent mechanical properties, must also have high melt strength, heat resistance and good surface. Generally heat-resistant ABS requires a higher processing temperature due to the addition of heat-resistant agents, and when the processing temperature rises, the fluidity incre...

AI Technical Summary

Problems solved by technology

The high-melt-strength special composition for automobile tail fins has the characteristics of high melt strength, good balance between longitudinal and transverse extensions, good dimensional stability, high heat distortion temperature, and easy processing. It mainly solves the problem of heat-resistant ABS blow molding automobiles at home and abroad. There are problems such as insufficient melt strength, poor wall hanging, poor thermal stability, deformation in high and low temperature cycle tests, and uneven surface of the product in the empennage

However, it does not disclose the surface appearance of blow molding, and as mentioned above, the small molecular monomers generated during processing lead to poor surfaces, and this invention does not solve the problem of small molecular monomers generated during material processing

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