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Scratching-resistant polypropylene composite material capable of resisting stress whitening and preparation method thereof

A technology of anti-stress whitening and composite materials, which is applied in the field of automotive interior parts, can solve the problems of product stress whitening, etc., and achieve the effects of low production cost, improved scratch resistance, and excellent scratch resistance

Inactive Publication Date: 2015-04-29
SHANGHAI PRET COMPOSITES +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to improve the scratch resistance of polypropylene composite materials and solve the problem of serious stress whitening of products caused by the addition of polysiloxane scratch resistance agents, the technical solution of the present invention is to add reaction Reactive high polysiloxane and initiator, in the process of extrusion blending, reactive high polysiloxane and polypropylene material are cross-linked, so as to significantly improve the scratch resistance of polypropylene material and solve the problem of The addition of polysiloxane anti-scratch agent leads to serious stress whitening of the product

Method used

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  • Scratching-resistant polypropylene composite material capable of resisting stress whitening and preparation method thereof
  • Scratching-resistant polypropylene composite material capable of resisting stress whitening and preparation method thereof
  • Scratching-resistant polypropylene composite material capable of resisting stress whitening and preparation method thereof

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Embodiment Construction

[0027] Below in conjunction with embodiment, the present invention is described in further detail:

[0028] In the composite material formulations of Examples and Comparative Examples, the polypropylene used is a copolymerized polypropylene produced by Shanghai Petrochemical, and the trade name is M2600R. The talc powder is 5000 mesh talc powder with an average particle size of 2.5 microns. The toughening agent POE used is a linear ethylene-octene copolymer produced by Dupont Company of the United States, the brand name is Engage 8180, the density is 0.863g / cm3, and the melt flow rate is 0.5g / 10min. The reactive polysiloxane used is self-made polysiloxane containing vinyl reactive functional groups, and the molecular weight is between 10,000 and 30,000. The initiator used is 1,3,5-triisopropylbenzene from Shanghai Ethyl Chemical Co., Ltd., with a molecular formula of C15H24 and a molecular weight of 204.4. Used main antioxidant is the DSTP that British ICE company produces, ...

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Abstract

The invention discloses a scratching-resistant polypropylene composite material capable of resisting stress whitening and a preparation method thereof. The polypropylene composite material is prepared from the following raw materials in percentage by weight: 45-98% of polypropylene, 0-30% of talcum powder, 0-15% of a flexibilizer POE, 1-5% of reaction type high polysiloxane, 0.1-1% of an initiator, 0.1-1% of an antioxidant, 0.1-1% of a light stabilizer, and 0-2% of other auxiliaries. According to the preparation method disclosed by the invention, under the action of the initiator, the reaction type high polysiloxane and the polypropylene material are crosslinked, so that when the scratching resistance of the polypropylene material is improved, the stress whitening problem of the product caused by addition of the polysiloxane scratching-resistant agent can be solved; the scratching-resistant polypropylene composite material is simple in preparation process and convenient to use.

Description

technical field [0001] The invention relates to a scratch-resistant and stress-resistant whitening polypropylene composite material and its preparation method. It is a polypropylene composite material with simple process, low cost and good comprehensive performance. It is mainly used in automotive interior parts and belongs to the polymerization industry. Material modification and processing technology field. Background technique [0002] Polypropylene is widely used in automotive interior and exterior trims because of its good processing performance, physical, mechanical and chemical properties, light weight and low price. It is currently the fastest growing general-purpose thermoplastic. However, due to the low surface hardness of polypropylene, automotive interior parts made of polypropylene materials have poor scratch resistance and the surface is easily scratched. At the same time, the surface of the product is also prone to stress whitening, which directly affects the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L53/00C08L23/08C08L83/07C08K13/02C08K3/34B29C47/92B29C48/92
CPCC08L23/12B29C48/92C08K2201/005C08L53/00C08L2205/02C08L2205/03C08L23/0815C08L83/04C08K13/02C08K3/34
Inventor 康兴宾张鹰张祥福周文
Owner SHANGHAI PRET COMPOSITES
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