A kind of anti-tiger skin pattern polypropylene composite material for spray-free bottom guard plate and preparation method thereof

A composite material and tiger-skin-resistant technology, which is applied in the field of polypropylene modified materials for spray-free bottom guards and its preparation, can solve the problem of limited compatibility between styrene-butadiene impact-resistant transparent resin and polypropylene, and the reinforcement effect of polypropylene Limited, high extruder process requirements and other problems, to achieve the effect of improving apparent defects, reducing paint spraying process, and good melting state

Active Publication Date: 2022-07-12
WANHUA CHEMICAL (NINGBO) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has high requirements on the extruder process, and the scope of application is limited, which is not conducive to the transmission of mold pressure, and the cost of changing the mold is high and the risk is high
[0005] Chinese patent CN201610608271 discloses a way to suppress the tiger skin pattern of polypropylene materials by introducing styrene-butadiene impact-resistant transparent resin and surface-modified porous silica with hydroxyl groups, but the reinforcing effect of silica spherical fillers on polypropylene Limited, the prepared materials cannot be applied to parts with high rigidity requirements such as bumpers and grilles, and the compatibility of styrene-butadiene impact-resistant transparent resin with polypropylene is limited, which affects the toughness of materials

Method used

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  • A kind of anti-tiger skin pattern polypropylene composite material for spray-free bottom guard plate and preparation method thereof
  • A kind of anti-tiger skin pattern polypropylene composite material for spray-free bottom guard plate and preparation method thereof
  • A kind of anti-tiger skin pattern polypropylene composite material for spray-free bottom guard plate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] S1: Place the impact-resistant polypropylene (K7760H) in a xylene solvent and heat it to 140°C and stir to dissolve fully. Wherein the mass of soluble matter is 1kg, after cooling and cooling for 2h, the insoluble matter is filtered with a Buchner funnel to obtain a solution containing 14.4kg of soluble matter;

[0068] S2: Add 20 g of superconducting carbon black, 0.5 g of cross-linking agent DCP and 1 kg of UHMWPE together into a low-temperature grinder and grind them together into powder. Use liquid nitrogen to cool down to minus 100 °C, and rotate at 8000 rpm / min to form superconducting carbon black. and DCP-coated powder UHWMPE10 (particle size less than 10 microns), add 1.0kg UHMWPE10 powder to the S1 solution, stir and mix evenly, then heat and rotate at 80 °C to remove the solvent, and finally obtain 2.0kg of surface soluble matter Coated UHMWPE10 powder;

[0069] S3: Add 20g of calcium carbonate to the above modified powder, stir and mix well to obtain mineral...

Embodiment 2

[0073] S1: Place the impact-resistant polypropylene (SP179P) in a xylene solvent and heat it to 140° C. and stir to fully dissolve. Wherein, the mass of soluble matter is 1.5kg, and after cooling for 2h, the insoluble matter is filtered with a Buchner funnel to obtain 13.1kg of a solution containing soluble matter;

[0074] S2: Add 50 g of superconducting carbon black and 2.4 g of DCP together with 1 kg of UHMWPE into a low-temperature grinder and grind them together into powder. Use liquid nitrogen to cool down to minus 100 °C, and rotate at 8000 rpm / min, and finally form a superconducting carbon black and DCP package. Coated powder UHWMPE5 (particle size is less than 5 microns), add 1.0kg UHMWPE5 powder into the S1 solution, stir and mix evenly, and then remove the solvent by heating and rotary evaporation at 80 °C, and finally obtain 2.5kg of surface soluble matter-coated powder. UHMWPE5 powder;

[0075] S3: Add 50g talc powder to the above modified powder, stir and mix we...

Embodiment 3

[0079] S1: The impact polypropylene (K8303) is placed in a xylene solvent and heated to 140°C and stirred to be fully dissolved, wherein the mass ratio of impact polypropylene and xylene solvent is 1:2, and the mass of impact polypropylene is 9.1kg. Wherein, the mass of soluble matter is 2.0kg, and after cooling for 2h, the insoluble matter is filtered with a Buchner funnel to obtain 20.2kg of a solution containing soluble matter;

[0080] S2: add 90g of zinc oxide and 9g of DCP and 1kg of UHMWPE together into a low-temperature grinder and grind into powder together, use liquid nitrogen to cool down to minus 100 ℃, rotate speed 8000rpm / min, and finally form powder UHWMPE2 ( particle size is less than 2 microns), 1.0kg of UHMWPE2 powder was added to the S1 solution, and then the solvent was removed by heating and rotary evaporation at 80°C, and finally 3.0kg of UHMWPE2 powder coated with surface solubles was obtained;

[0081] S3: Add 90 g of talc powder to the above modified p...

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Abstract

The invention provides a non-spraying-free polypropylene composite material for a tiger skin pattern and a preparation method thereof. The composite material comprises: modified polypropylene, talc powder, aluminum powder, antioxidant, lubricant, wherein the modified polypropylene is a UHMWPE powder coated with a polypropylene soluble matter as a dispersed phase, and homopolymerized Propylene and / or random copolymerized polypropylene serve as continuous phase. The prepared polypropylene composite material can be used for polypropylene products with anti-tiger skin pattern requirements, especially for the polypropylene bottom guard plates of passenger cars without spraying, and good appearance effects can be obtained.

Description

technical field [0001] The invention belongs to the technical field of polypropylene composite materials, and in particular relates to a polypropylene modified material for a spray-free bottom guard plate with anti-tiger skin pattern and a preparation method thereof. Background technique [0002] Polypropylene plastic is a thermoplastic resin obtained by polymerizing propylene. It has rich raw material sources, good chemical resistance, easy molding and processing, low price, and can be recycled many times. As environmental protection requirements become more and more stringent, modified polypropylene materials are more and more widely used in surface sprayed parts, but polypropylene modified materials are prone to tiger skin patterns when injection molding parts, which seriously affects the appearance of products, resulting in Polypropylene materials are limited in their application as exterior parts. [0003] The reason for the tiger skin pattern of polypropylene parts is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/14C08L23/12C08L23/06C08K13/02C08K5/14C08K5/098C08K3/34C08K3/08C08K3/04C08K3/22
CPCC08L23/14C08L23/12C08L2207/068C08L2205/02C08K2003/0812C08K2003/2296C08L23/06C08K13/02C08K5/14C08K5/098C08K3/34C08K3/08C08K3/04C08K3/22
Inventor 李保印陆佳伟吴志超陈连清
Owner WANHUA CHEMICAL (NINGBO) CO LTD
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