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A kind of impact-resistant polypropylene composition for automobile bumper and preparation method thereof

A technology of polypropylene composition and automobile bumper, which is applied in the direction of bumper, etc. It can solve the problems of poor stability, low flexural modulus and heat distortion temperature, and production load drop, and achieve the effect of high impact strength

Active Publication Date: 2015-10-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Domestic demand for high-impact high-modulus copolymerized PP is relatively large, but there are few manufacturers and output
The main reason is that the production process of impact PP with high rubber content is poor in stability, easy to stick to the kettle, and the production load drops more
While obtaining high impact performance, the flexural modulus and heat distortion temperature are often low. Due to the limitation of PP polymerization equipment and process, it is difficult to achieve long-term stable production
[0004] Although domestic petrochemical companies have done a lot of work in developing high-performance PP, there are still few brands of copolymerized PP resins, especially high-flow copolymerized products, and they cannot fully meet the needs of the automotive industry in terms of performance and production quantity. There is no relevant patent report on the production of impact-resistant copolymerized PP materials for automobile bumpers with controllable rheology through reactor polymerization and direct production in China.

Method used

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  • A kind of impact-resistant polypropylene composition for automobile bumper and preparation method thereof
  • A kind of impact-resistant polypropylene composition for automobile bumper and preparation method thereof
  • A kind of impact-resistant polypropylene composition for automobile bumper and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Take comonomer as ethylene, 100 parts of block copolymerized polypropylene with ethylene content of 10wt%, tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and triphosphate Take 0.15 parts of (2.4-di-tert-butylphenyl) ester at a ratio of 1:1, 0.10 parts of high-purity calcium stearate, and mix the nucleating agent methylene bis(2,4-di-tert-butylphenyl)phosphoric acid The ester hydroxyl aluminum salt is loaded on the carrier of nanoscale powder rubber to make 0.15 parts of nanocomposite nucleating agent, and the nanoscale powder rubber is prepared by the method comprising the following steps: the slurry of inorganic particles, nucleating agent, The synthetic rubber latex is evenly mixed to obtain a mixed emulsion, and then the mixed emulsion is spray-dried. The above-mentioned materials are placed in a high-speed mixer and stirred evenly to obtain a base material for later use. Weigh 100 parts of homopolypropylene and 0.65 parts of dicumy...

Embodiment 2

[0028] Take comonomer as ethylene, 100 parts of block copolymerized polypropylene with ethylene content of 13wt%, hindered phenolic antioxidant tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] Pentaerythritol ester and tris (2.4-di-tert-butylphenyl) phosphite get 0.15 part in the ratio of 1:1, 0.10 part of high-purity calcium stearate, the nucleating agent methylene bis (2,4-di tert-butylphenyl) phosphate hydroxyaluminum salt is loaded on the carrier of nanoscale powder rubber to make 0.2 parts of nanocomposite nucleating agent, and the preparation method of nanoscale powder rubber is the same as in Example 1. The above-mentioned materials are placed in a high-speed mixer and stirred evenly to obtain a base material for later use. Weigh 100 parts of homopolypropylene and 0.65 parts of dicumyl peroxide, put the above materials in a high-speed mixer and stir evenly, and process them into a peroxide masterbatch with a twin-screw extruder for later use. The obtaine...

Embodiment 3

[0030]Take comonomer to be ethylene, ethylene content is 100 parts of the block copolymerization polypropylene of 12wt%, tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester and phosphorous acid Weigh 0.15 parts of tris(2.4-di-tert-butylphenyl) ester in a ratio of 1:1, 0.10 parts of high-purity calcium stearate, and mix nucleating agent methylene bis(2,4-di-tert-butylphenyl ) phosphate ester hydroxyaluminum salt is loaded on the carrier of nanoscale powder rubber to make 0.25 parts of nanocomposite nucleating agent, and the preparation method of nanoscale powder rubber is the same as in Example 1. The above-mentioned materials are placed in a high-speed mixer and stirred evenly to obtain a base material for later use. Weigh 100 parts of homopolypropylene, 1 part of 1,1-bis(tert-butyl peroxide)-3,3,5-trimethylcyclohexane, place the above materials in a high-speed mixer and stir evenly, and use The twin-screw extruder is processed into a peroxid...

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Abstract

The invention provides an antishock polypropylene composition used for an automobile bumper and a preparation method of the composition. The composition comprises following components: 100 parts of blocked co-polypropylene, 0.15-0.3 part of an auxiliary agent, 0.15-0.3 part of a nano composite nucleating agent, and 0.15-0.3 part of a peroxide master batch. The composition has high toughness, high rigidity and a flexural modulus not less than 1000 MPa. Under a precondition of a high melt flow rate, the material is guaranteed to have high impact strength, flexural modulus and heat resistance, and to have a characteristic that the rigidity and the toughness are balanced. The composition is suitable for production of high-end automobile bumper injection molding products.

Description

technical field [0001] The invention belongs to the field of new materials, and in particular relates to an impact-resistant polypropylene composition for automobile bumpers and a preparation method thereof. The prepared impact-resistant polypropylene composition is mainly used in the production of high-end automobile bumper impact-resistant parts. It can be widely used in all kinds of automotive interior and exterior trim parts, furniture, electrical plastic parts, etc. that require high rigidity and toughness balance of polypropylene resin. Background technique [0002] At present, there are mainly three kinds of special materials for forming car bumpers in foreign countries: a, polypropylene (PP) copolymer / EPDM blend; b, propylene / ethylene block copolymer (EPM) / polyolefin thermoplastic elastomer (POE) blend; c, impact-resistant PP / EPM reactor blend with a rubber content of up to 35%. At present, most domestic car bumpers use the first two types. Although EPDM has a good...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L53/00C08L23/12C08K13/02C08K5/134C08K5/526C08K5/098C08K5/053C08K5/523C08K5/14B29B9/06B29C47/92B60R19/03B29C48/92
CPCB29C48/04
Inventor 魏峰黎地徐振明傅勇
Owner CHINA PETROLEUM & CHEM CORP