Modified polypropylene material as well as preparation method and application thereof

A technology of polypropylene material and bulk polypropylene, which is applied in the field of polymer modification, can solve the problems of reducing the aesthetics of products, poor surface scratch resistance, and poor impact resistance of PP, so as to save resource consumption, scratch resistance and Excellent processability and vehicle weight reduction effect

Inactive Publication Date: 2012-05-23
华砻树脂股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, our commonly used polypropylene (PP) material has the advantages of low density, good rigidity, high strength, warpage resistance, heat resistance above 100°C, and good chemical resistance, but PP also has poor impact resistance ( The notched impact strength at room temperature is only 4~6kJ / m 2 ), easy aging, large molding shrinkage and other shortcomings, which limit its application in the field of automotive interior parts
Moreover, the surface scratch resistance of PP materials is very poor, which greatly reduces the aesthetics of the products, and the scratches on the surface of the products will also lead to stress concentration, which limits its use. Therefore, it is necessary to improve the surface resistance of PP materials. Scratch performance is an important research topic

Method used

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  • Modified polypropylene material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 48 parts of bulk polypropylene powder, 21 parts of copolymerized polypropylene, 20 parts of polyolefin elastomer, 8 parts of linear low density polyethylene, 10 parts of wollastonite, 8 parts of maleic anhydride grafted polypropylene, reactive polymer Add 4 parts of siloxane, 0.6 parts of calcium stearate, 4 parts of composite antioxidant 2246 / DLTP (the mass ratio of composite antioxidant 2246 / DLTP is 1.5:1), and 1.8 parts of aluminate coupling agent into the reactor in sequence Stir in medium for 12 minutes; then mix in a high-speed mixer for 8 minutes, the speed of the mixer is 4000-6000r / min, and the heating temperature is 100-120°C; The diameter is 68mm, the length-to-diameter ratio is 25:1, the screw speed is 80r / min, and the extrusion temperature is 180-230°C; after cooling to room temperature, and then drying for 20-30min, injection molding samples are prepared, and the injection temperature is 190-220°C. Pressure: 40~80MPa, back pressure: 0.7MPa, exhaust port de...

Embodiment 2

[0036]42 parts of bulk polypropylene powder, 22 parts of copolymerized polypropylene, 15 parts of polyolefin elastomer, 6 parts of linear low density polyethylene, 8 parts of wollastonite, 8 parts of maleic anhydride grafted polypropylene, reactive polymer Add 5 parts of siloxane, 0.5 parts of calcium stearate, 3.5 parts of composite antioxidant 2246 / DLTP (the mass ratio of composite antioxidant 2246 / DLTP is 1.5:1), and 1.5 parts of aluminate coupling agent into the reactor in sequence Stir in medium for 10 minutes; then mix in a high-speed mixer for 6 minutes, the speed of the mixer is 4000-6000r / min, and the heating temperature is 100-120°C; The diameter is 68mm, the length-to-diameter ratio is 20:1, the screw speed is 60r / min, and the extrusion temperature is 180-230°C; after cooling to room temperature and drying for 20-30min, injection molding samples are prepared, and the injection temperature is 190-220°C. Pressure: 40~80MPa, back pressure: 0.7MPa, exhaust port depth: 0...

Embodiment 3

[0038] 42 parts of bulk polypropylene powder, 33 parts of copolymerized polypropylene, 18 parts of polyolefin elastomer, 15 parts of linear low density polyethylene, 8 parts of wollastonite, 6 parts of maleic anhydride grafted polypropylene, reactive polymer 6 parts of siloxane, 0.8 parts of calcium stearate, 4.4 parts of composite antioxidant 2246 / DLTP (the mass ratio of composite antioxidant 2246 / DLTP is 1.5:1), and 2.1 parts of aluminate coupling agent are added to the reactor in sequence Stir in medium for 15 minutes; then mix in a high-speed mixer for 5 minutes, the speed of the mixer is 4000-6000r / min, and the heating temperature is 100-120°C; The diameter is 68mm, the length-to-diameter ratio is 26:1, the screw speed is 90r / min, and the extrusion temperature is 180-230°C; after cooling to room temperature and drying for 20-30min, injection molding samples are prepared, and the injection temperature is 190-220°C. Pressure: 40~80MPa, back pressure: 0.7MPa, exhaust port de...

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Abstract

The invention belongs to the technical field of high molecule modification and processing and relates to a modified polypropylene material as well as a preparation method and application thereof. The material provided by the invention comprises the following components in parts by weight: 40-50 parts of bulk polypropylene, 20-35 parts of co-polypropylene, 15-24 parts of toughening agent, 0-15 parts of linear low-density polyethylene, 8-15 parts of filler retention aid, 6-12 parts of compatilizer, 0-8 parts of scratch-resistant smoothing agent, 0.5-1 part of lubricating agent, 3.5-5 parts of composite antioxidant and 1.5-3 parts of coupling agent. Compared with the prior art, the modified polypropylene material provided by the invention has the advantages of good rigidity, ductility, improvement on impact strength, heat resistance, ageing resistance, scratch resistance and excellent processing performance. The material provided by the invention can be widely applied to various interior trim parts of automobiles.

Description

technical field [0001] The invention belongs to the technical field of polymer modification and processing, and relates to a modified polypropylene material, a preparation method and an application thereof. Background technique [0002] With the development of the automobile industry, my country's automobile production has grown steadily, and the scale of automobile consumption has become increasingly large. According to data released by the China Association of Automobile Manufacturers, my country's output reached 9.3451 million vehicles in 2008, and the sales volume of automobiles reached 9.3805 million vehicles. Although the global economic crisis has had a serious impact on the auto industries of various countries, domestic auto manufacturers have actively responded, and with the support of government policies, China's auto sales have recently begun to pick up. From the perspective of the overall trend, my country's auto industry will still maintain a stable Sustained ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L53/00C08L23/08B29B9/06B29C47/92B29C45/76B29C48/92
CPCB29C48/04B29C48/92B29C2948/92561B29C2948/92704B29C2948/92895
Inventor 郭学林
Owner 华砻树脂股份有限公司
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