Low after-shrinkage polypropylene composite for car bumper bar and preparation method of low after-shrinkage polypropylene composite

A technology of composite materials and polypropylene, applied in the field of low aftershrinkage polypropylene composite materials and its preparation, can solve the problems of reduced material toughness, floating fibers, and failure to meet the requirements of automobile bumpers, and achieve the effect of reducing the shrinkage rate

Inactive Publication Date: 2017-01-04
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above three methods all have disadvantages, which are: adding fillers or increasing the amount of fillers, which will inevitably lead to a decrease in material toughness; adding glass fibers will inevitably bring about injection molding problems such as floating fibers and warping; adding toughening agents The content will inevitably bring about the increase of cost and the decrease of modulus
[00

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] (1) Weigh 15 parts of basic magnesium sulfate whiskers into high-speed mixer A, then add 0.08 parts of zinc stearate and 0.12 parts of ethylene bis stearic acid amide and mix for 20 minutes to obtain a premix;

[0066] (2) Mix 3 / 5 of the total amount of the premix in (1) and 10 parts of 8000 mesh talcum powder in high-speed mixer A for 20 minutes. The speed of the high mixer A is 200 rpm, and the temperature is 50°C.

[0067] (3) Weigh 60 parts of polypropylene BX3900, 40 parts of polypropylene EP5077, 15 parts of ABS 8391, 15 parts of toughening agent POE 8150, 7 parts of toughening agent EM-500A, and 3 parts of toughening agent SEBS G1652 in a high-speed mixer In B, then add 0.25 parts of nucleating agent HPN-20E, 0.2 parts of coupling agent KH550 and mix for 20 minutes. The speed of the high mixer B is 200 rpm, and the temperature is 50°C.

[0068] (4) Add the mixture in step (2) to high-speed mixer B, then add 0.06 parts of antioxidant 1010 and 0.09 parts of antio...

Embodiment 2

[0088] (1) Weigh 45 parts of basic magnesium sulfate whiskers into high-speed mixer A, then add 0.21 parts of lubricant zinc stearate and 0.19 parts of lubricant ethylene bis stearic acid amide and mix for 30 minutes to obtain a premix;

[0089] (2) Mix 3 / 5 of the total amount of the premix in (1) and 35 parts of 11000 mesh talcum powder in high-speed mixer A for 30 minutes. The rotating speed of high mixer A is 300 rpm, and the temperature is 70°C.

[0090] (3) Weigh 58 parts of polypropylene BX3920, 42 parts of polypropylene EP5077, 30 parts of ABS 750, 30 parts of toughening agent POE 8150, 10 parts of toughening agent EM-500A, and 5 parts of toughening agent SEBS G1652 in a high-speed mixer In B, then add 0.5 parts of nucleating agent HPN-20E, 0.3 parts of coupling agent KH550 and mix for 30 minutes. The speed of high mixer B is 300 rpm, and the temperature is 70°C.

[0091] (4) Add the mixture in step (2) to high-speed mixer B, then add 0.22 parts of antioxidant 1010 an...

Embodiment 3

[0114] (1) Weigh 21 parts of basic magnesium sulfate whiskers into high-speed mixer A, then add 0.09 parts of lubricant zinc stearate and 0.17 parts of lubricant ethylene bis stearic acid amide and mix for 23 minutes to obtain a premix;

[0115] (2) Mix 3 / 5 of the total amount of the premix in (1) and 12 parts of 11000 mesh talcum powder with high-speed mixer A for 27 minutes. The rotating speed of high mixer A is 234 rpm, and the temperature is 57°C.

[0116] (3) Weigh 43 parts of polypropylene K7760H, 57 parts of polypropylene EP5077, 19 parts of ABS 8391, 19 parts of toughening agent POE 8150, 7 parts of toughening agent EM-500A, 5 parts of toughening agent SEBS G1652 and high-speed mixer In B, then add 0.29 parts of nucleating agent HPN-20E, 0.24 parts of coupling agent KH550 and mix for 24 minutes. The speed of high mixer B is 209 rpm, and the temperature is 59°C.

[0117] (4) Add the mixture in step (2) to high-speed mixer B, then add 0.16 parts of antioxidant 1010 and...

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PUM

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Abstract

The invention provides a low after-shrinkage polypropylene composite for a car bumper bar and a preparation method of the low after-shrinkage polypropylene composite. The low after-shrinkage polypropylene composite is prepared from 100 parts of polypropylene, 15-30 parts of acrylonitrile-butadiene-styrene, 15-45 parts of basic magnesium sulfate crystal whiskers, 10-35 parts of high-mesh talcum powder, 25-45 parts of flexibilizer, 0.25-0.5 part of nucleating agent, 0.4-0.8 part of lubricating agent, 0.2-0.3 part of coupling agent and 0.15-0.4 part of antioxygen. An acrylonitrile-butadiene-styrene copolymer, the basic magnesium sulfate crystal whiskers, the nucleating agent, the flexibilizer and the like are added into polypropylene to influence the crystallization property of PP, therefore, the shrinkage rate of the PP composite is reduced, the shrinkage rate change before and after coating of the prepared polypropylene composite is smaller than 0.1%, and the requirement of the car bumper bar is met.

Description

technical field [0001] The invention relates to the field of polymer material modification, in particular to a low aftershrinkage polypropylene composite material for automobile bumpers and a preparation method thereof. Background technique [0002] Polypropylene (PP) is widely used due to its low price, easy processing and molding, low density, chemical corrosion resistance and excellent physical and mechanical properties, and it has become one of the fastest growing general-purpose plastics. In recent years, with the requirements of automobile lightweight and the development of plastic modification industry, plastic materials are increasingly used in automobiles, electronic appliances, home appliances and other industries to meet the requirements of lightweight, energy saving and emission reduction. Polypropylene (PP) is widely used in automotive interior and exterior trims, such as bumpers, door panels, instrument panels, pillars, and steering wheels, due to its advantage...

Claims

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Application Information

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IPC IPC(8): C08L23/14C08L55/02C08L23/08C08L51/04C08L53/02C08L91/06C08K13/04C08K7/08C08K5/098C08K5/20C08K3/34B29C47/92B29C48/92
CPCC08L23/14B29C48/92B29C2948/92704C08K2201/003C08L2205/025C08L2205/035C08L2205/24C08L55/02C08L23/0815C08L51/04C08L53/025C08L91/06C08K13/04C08K7/08C08K5/098C08K5/20C08K3/34
Inventor 杨桂生俞飞
Owner HEFEI GENIUS NEW MATERIALS
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