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Highly impact-resistant polypropylene resin composition and preparation method thereof

A high-impact polypropylene and resin composition technology, applied in the field of synthetic resins, can solve the problems of reduced thermal deformation temperature of polypropylene, poor impact resistance, low toughness, etc., and achieve production cost savings, good compatibility, and improved Effects of toughness and impact resistance

Active Publication Date: 2017-04-05
CHAMBROAD CHEM IND RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Highly impact-resistant polypropylene resin composition and preparation method thereof
  • Highly impact-resistant polypropylene resin composition and preparation method thereof
  • Highly impact-resistant polypropylene resin composition and preparation method thereof

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preparation example Construction

[0033] The invention provides a method for preparing a high-impact polypropylene resin composition, comprising the following steps:

[0034] a), blending and extruding raw materials to obtain a high-impact polypropylene resin composition;

[0035] The raw materials include 50-90 parts by weight of polypropylene, 10-50 parts by weight of polybutene alloy, 0-5 parts by weight of antioxidant, 0-30 parts by weight of filler and 0-1 part by weight of nucleating agent;

[0036] The polybutene content in the polybutene alloy is 60-90 wt%, the polypropylene content is 9.9-35 wt%, and the polybutene-polypropylene block copolymer content is 0.1-5 wt%.

[0037] In the preparation method provided by the invention, the raw materials are directly blended and extruded. Wherein, the raw materials are consistent with the components contained in the above resin composition, and will not be repeated here. In the present invention, the blending extrusion temperature is preferably 170-240°C, more...

Embodiment 1

[0041] 1) Composition design:

[0042]

[0043] 2) Prepare the resin composition:

[0044] According to the design composition in 1), feed the raw materials into a twin-screw extruder with a length-to-diameter ratio of 40:1. The temperature of zone 4 is set to 205°C, the temperature of zone 5 is set to 210°C, the temperature of zone 6 is set to 205°C, the temperature of the head is set to 200°C, and the screw speed is set to 195r / min. The raw materials are blended and extruded in a twin-screw extruder to obtain a high-impact polypropylene resin composition.

Embodiment 2

[0046] 1) Composition design:

[0047]

[0048]

[0049] 2) Prepare the resin composition:

[0050] According to the design composition in 1), feed the raw materials into a twin-screw extruder with a length-to-diameter ratio of 40:1. The temperature of zone 4 is set to 215°C, the temperature of zone 5 is set to 220°C, the temperature of zone 6 is set to 225°C, the temperature of the head is set to 210°C, and the screw speed is set to 205r / min. The raw materials are blended and extruded in a twin-screw extruder to obtain a high-impact polypropylene resin composition.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/20C08L53/00C08K13/02C08K3/34C08K3/26C08K3/36
CPCC08K2201/003C08L23/12C08L2201/08C08L2205/02C08L2205/03C08L2207/10C08L23/20C08L53/00C08K13/02C08K3/34C08K2003/265C08K3/36
Inventor 张新财马韵升柳金章刘振学丁其维李海艳高立花贾福祥高雨
Owner CHAMBROAD CHEM IND RES INST CO LTD
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