Highly impact-resistant polypropylene resin composition and preparation method thereof

Abstract

The invention belongs to the field of synthetic resin and particularly relates to a highly impact-resistant polypropylene resin composition and a preparation method thereof. The highly impact-resistant polypropylene resin composition comprises the following components in parts by weight: 50-90 parts of polypropylene, 10-50 parts of polybutylene alloy, 0-5 parts of an antioxidant, 0-30 parts of packing and 0-1 part of a nucleating agent; the polybutylene alloy comprises the following components in percentages by weight: 60-90wt% of polybutylene, 9.9-35wt% of polypropylene and 0.1-5wt% of a polybutylene-polypropylene block copolymer. By adding the specific polybutylene alloy into polypropylene, the toughness and impact-resistance of the composition are remarkably improved while heat deformation resistance and rigidity of polypropylene are maintained. In addition, in the resin composition provided by the invention, the compatibility of the polybutylene alloy and polypropylene is good, and a coupling agent needs not to be additionally added or the polybutylene alloy needs not to be treated on the surface, so that the production cost can be lowered.

Description

technical field [0001] The invention belongs to the field of synthetic resins, in particular to a high-impact polypropylene resin composition and a preparation method thereof. Background technique [0002] Polypropylene is a thermoplastic resin produced by the polymerization of propylene. According to the position of the methyl group, it is divided into three types: isotactic polypropylene, atactic polypropylene and syndiotactic polypropylene. Polypropylene has become one of the most widely used general-purpose plastics due to many advantages such as abundant raw material sources, simple synthesis process, low price, and good comprehensive performance. However, polypropylene has fatal defects of low toughness and poor impact resistance. [0003] Studies have found that in the process of propylene polymerization, introducing an appropriate amount of ethylene or butene as a comonomer into its molecular chain can significantly improve the toughness and impact resistance of pol...

AI Technical Summary

Problems solved by technology

Polypropylene has become one of the most widely used general-purpose plastics due to its rich sources of raw materials, simple synthesis process, low price, and good comprehensive performance. However, polypropylene has fatal defects of low toughness and poor impact resistance.

[0003] Studies have found that in the process of propylene polymerization, introducing an appropriate amount of ethylene or butene as a comonomer into its molecular chain can significantly improve the toughness and impact resistance of polypropylene, but this chemical modification method will suffer from heat deformation. The constraints of performance deterioration and rigidity reduction, that is, its improvement of polypropylene toughness and impact resistance is limited, otherwise it will lead to a decrease in the heat distortion temperature of polypropylene and deterioration of physical properties such as bending strength

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