Stress and whitening-resistant filled/modified polypropylene and preparation method thereof

A technology of anti-stress whitening and polypropylene, which is applied in the field of preparation of filled modified polypropylene and filled modified polypropylene, and can solve problems such as unqualified products, affecting appearance, and whitening

Inactive Publication Date: 2011-04-20
SUZHOU SUNWAY POLYMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When modified polypropylene is used for injection molding products and when parts are assembled, it is easy to produce whitening at the ejector pin or assembly, which affects the appearance and even leads to unqualified products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] In order to clearly understand technical content of the present invention, the present invention will be further described below in conjunction with embodiment:

[0042]

[0043] First mix PP, toughener and compatibilizer at 1400 rpm for 2 minutes at high speed; then add dispersant, antioxidant and light stabilizer, and mix at 1400 rpm for 2 minutes at high speed; finally add minerals, Mix at high speed at 1500 rpm for 3 minutes to obtain a premixed material; then extrude and granulate through a twin-screw extruder to obtain a filled modified polypropylene that resists stress whitening. The measured properties are shown in the table below.

[0044]

[0045] In summary, the stress whitening resistant filled modified polypropylene prepared by the present invention has good mechanical properties while solving the stress whitening phenomenon.

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PUM

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Abstract

The invention belongs to the field of polypropylene compound materials, and relates to a stress and whitening-resistant filled / modified polypropylene. The stress and whitening-resistant filled / modified polypropylene comprises the following compositions in parts by weight: 50 to 80 parts of PP, 5 to 25 parts of toughening agent, 10 to 25 parts of minerals, 1 to 5 parts of compatibilizer, 0.1 to 1 part of dispersant; 0.1 to 1 part of antioxygen, and 0.1 to 1 part of light stabilizer, wherein sum of the weight parts of the PP, the toughening agent, the mineral and the compatibilizer is 100. The prepared polypropylene compound material in the invention both has a good stress and whitening-resistant performance and an excellent comprehensive mechanical property. The preparation method in the invention is simple and easy to operate without special processing methods, and can be promoted and applied in large scale.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, and specifically relates to a stress-whitening-resistant filled modified polypropylene; the invention also relates to a preparation method of the stress-whitened-resistant filled modified polypropylene. Background technique [0002] Modified polypropylene composites are increasingly being used in automotive and other applications due to their recyclability, light weight and low cost. However, with the increasing technical level of plastic modification, more and more performance requirements are put forward for materials. [0003] When the modified polypropylene is used in injection molding products and in the assembly of components, it is easy to produce whitening at the ejector pin or assembly, which will affect the appearance and even lead to unqualified products. Therefore, a new requirement was born: "How to solve the problem of stress whitening on the basis of ensuring the compreh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/16C08L51/06C08K13/02C08K3/34B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 余林华顾在春任俊
Owner SUZHOU SUNWAY POLYMER
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