A kind of ultra-high melt strength blow molding ABS resin composition and preparation method thereof

Abstract

The invention relates to an ultra-high melt strength blow molding ABS resin composition and a preparation method thereof, comprising the following raw material components in parts by weight: 25-50 parts of ABS high rubber powder, 20-45 parts of SAN resin, SAN grafted 20-30 parts of permanent resin, 5-20 parts of heat-resistant agent, 0.1-1.0 part of crosslinking aid, 0.5-1.5 part of processing aid; its preparation method comprises the following steps: premixing the above-mentioned raw materials in a high-speed mixer for 3 -10 minutes, then the premixed material is extruded and granulated by a twin-screw extruder to obtain an ABS resin composition with ultra-high melt strength. Compared with the prior art, the present invention adopts the method of reactive extrusion blending, and macromolecular reactions occur between SAN grafted modified resins in the process of extrusion granulation, thereby preparing super-high melt strength and excellent comprehensive performance ABS resin, the resin composition is very suitable for blow molding of parts such as automobile tail fins and spoilers.

Description

technical field [0001] The invention relates to the technical field of polymer material processing, in particular to an ultra-high melt strength blow molding ABS resin composition and a preparation method thereof. Background technique [0002] ABS resin has good impact resistance, heat resistance, dimensional stability and excellent dyeing performance, and has been widely used in the fields of electronics, home appliances, and automobiles. Automobile rear fins and spoilers are usually prepared by blow molding. The ABS resin used for this kind of parts requires high melt strength and heat resistance in addition to good mechanical properties. Generally, the heat resistance of ABS is improved by adding a heat-resistant agent, which requires a higher processing temperature to ensure good plasticization and dispersion of the heat-resistant agent. Contradictory to this is that the increase in processing temperature increases the fluidity and decreases the melt strength, which eas...

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Problems solved by technology

Contradictory to this is that the increase in processing temperature increases the fluidity and decreases the melt strength, which easily causes uneven wall thickness and surface defects of blow molded products.

[0003] Patents US4430478, US5605963, and US5696204 disclose that the polymer produced by the emulsion polymerization process is mixed with the polymer produced by the bulk polymerization process to improve the impact performance of the material, but the material obtained by this method has low melt strength and poor blow molding performance

Patents CN200710171581.5 and CN200580040787.3 use emulsion polymerized ABS and bulk polymerized ABS raw materials to mix, but the melt index of the polymer cannot be improved, which is not conducive to blow molding

It is also reported in the literature that the melt strength can be improved by increasing the rubber content, but too high rubber content will inevitably lead to poor rigidity and low heat resistance of the material.

[0004] The deficiencies in the above-mentioned technical solutions have greatly limited the wide application of ABS resin in the field of blow molding products.

There is no report about a kind of ultra-high melt strength ABS resin composition with simple process, excellent physical and mechanical properties and low cost and its preparation method

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