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Stress whitening resistant modified polypropylene material and preparation method thereof

A polypropylene material and stress-resistant technology, applied in the field of modified polypropylene and its preparation, can solve the problems of increasing material costs and achieve the effects of low cost, broad application prospects, and easy industrialized large-scale production

Active Publication Date: 2013-01-09
中广核俊尔(上海)新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this technical solution, the blending of POE or EPDM or EPR and polypropylene copolymer is used to improve stress whitening, which also has the problem of increasing material cost

Method used

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  • Stress whitening resistant modified polypropylene material and preparation method thereof
  • Stress whitening resistant modified polypropylene material and preparation method thereof
  • Stress whitening resistant modified polypropylene material and preparation method thereof

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Embodiment 1～4

[0044] Weigh the raw materials according to the components and contents listed in Table 1, first mix polypropylene resin, filler (talcum powder), polyethylene, antioxidant (antioxidant 1010 and antioxidant 168), lubricant (stearic acid) Calcium acid and talcum powder), titanium dioxide and pigments were mixed in a pre-mixer (800-1200 rpm, slowly increasing from low speed to high speed) for 30 minutes, mixed evenly to obtain a mixture, and then the mixture was added to the twin-screw extruder Melting and kneading, extruding and granulating in the extruder, the temperature of melting and kneading in the twin-screw extruder is 180 ° C ~ 230 ° C (that is, the temperature of the mixture passing through the twin-screw extruder in turn is 180 ° C, 190 ° C, 200 ° C , 210 ° C, 210 ° C, 210 ° C, 220 ° C, 220 ° C, 220 ° C, the melting and mixing zone of the die head 225 ° C) to obtain stress whitening modified polypropylene material.

[0045] The stress-whitening-resistant modified polyp...

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Abstract

The invention discloses a stress whitening resistant modified polypropylene material. The material comprises, by weight, 60-83 parts of polypropylene resin, 10-25 parts of filling agents, 5-15 parts of polyethylene, 0.2-1 part of antioxidant, 0.2-1 part of lubricating agent, 0.3-2 parts of titanium pigment and 0.01-0.3 part of pigment, wherein grain diameters of the titanium pigment are in a range from 0.1 mu m to 0.5 mu m, the titanium pigment is added and is combined with other components, the polypropylene stress whitening phenomenon is reduced, the production cost is reduced and the good mechanical property of the material is kept. The invention also discloses a preparation method of the stress whitening resistant modified polypropylene material. The implementation is easy, industrial production of a prior twin-screw extruder in a mature technology is achieved, the preparation is simple, the large-scale industrial production is easy, and the method and the device have good economical benefits and wide application prospects.

Description

technical field [0001] The invention relates to a modified polypropylene and its preparation field, in particular to a modified polypropylene material resistant to stress whitening and a preparation method thereof. Background technique [0002] Polypropylene is one of the five general-purpose plastics and has a wide range of applications, especially in the automotive field in recent years. Although the use of polypropylene materials for vehicles is increasing year by year, the performance requirements for polypropylene materials are becoming more and more stringent. At the same time, there are also certain requirements for the processing performance of polypropylene materials. While decorating the performance of the material, the stress whitening and dimensional stability requirements of the polypropylene material are also considered. [0003] In order to make the polypropylene material meet the requirements of use, it is necessary to modify the polypropylene material to im...

Claims

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Application Information

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IPC IPC(8): C08L23/14C08L23/06C08L23/08C08K13/02C08K3/22B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/40
Inventor 彭楠黄志杰罗长令沈岳新左绍文
Owner 中广核俊尔(上海)新材料有限公司
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