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Spray-free polypropylene material for automotive exterior decorations and preparation technology thereof

A polypropylene material and preparation process technology, applied in the field of polypropylene materials, can solve the problems of restricting the application of spray-free polypropylene composite materials, unqualified appearance of products, etc., achieve good gloss and metallic texture, improve surface quality, and simplify the process. Effect

Inactive Publication Date: 2018-06-15
陈昭
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, while the spray-free technology endows polypropylene composites with a colorful appearance, some shortcomings of its products are also revealed and magnified
Due to the high gloss and bright colors of spray-free polypropylene, static electricity will inevitably be generated during production, transportation and use, thereby absorbing dust, seriously affecting the appearance of the material, and resulting in unqualified appearance of the product
These disadvantages severely limit the application of spray-free polypropylene composites

Method used

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  • Spray-free polypropylene material for automotive exterior decorations and preparation technology thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Spray-free polypropylene material for automotive exteriors, prepared from the following mass percentages of raw materials: 2.3% silver powder, 1.2% pearl powder, 3% ethylene-ethyl acrylate, 9% talc, 0.25% triethylene glycol ether -Bis(3-tert-butyl-4-hydroxy-5-methylphenyl)propionate, 0.3% N,N'-ethylene bisstearamide, 6% polymer type phosphorus flame retardant, 0.2 %1-bromo-5,5-dimethylhydantoin, 0.25% 5-chloro-2-(((dimethylamino)methylene)amino)benzophenone, the balance is polypropylene.

[0042] The preparation process of the above-mentioned spray-free polypropylene material for automobile exteriors includes the following steps:

[0043] (1) Add the raw materials to the mixer and stir and mix for 8 minutes at a speed of 1000r / min to obtain a mixture;

[0044] (2) Put the mixture into a twin-screw extruder, melt and extrude the strips, cool with water, blow off the water on the surface of the strips, and cut into cylindrical pellets with a diameter of 3mm×3mm to obtain automo...

Embodiment 2

[0046] Spray-free polypropylene material for automotive exteriors, prepared from the following mass percentages of raw materials: 2.3% silver powder, 1.2% pearl powder, 3% ethylene-ethyl acrylate, 9% modified talc, 0.25% triethylene Alcohol ether-bis(3-tert-butyl-4-hydroxy-5-methylphenyl) propionate, 0.3% N,N'-ethylene bisstearamide, 6% polymer type phosphorus-containing flame retardant , 0.2% 1-bromo-5,5-dimethyl hydantoin, 0.25% 5-chloro-2-(((dimethylamino)methylene)amino)benzophenone, the balance is polypropylene.

[0047] The modified talc powder was prepared by the following method: 100g talc powder was added to 1000g deionized water, and then 25.2g ammonium carbonate and 4.7g cerium nitrate were added at a rotational speed of 300r / min for 10min, and then 0.06mol / L hydrochloric acid Adjust the pH to 4, continue stirring at a temperature of 90°C at 300r / min for 60 minutes, centrifuge at a speed of 6000r / min for 20 minutes, and roast the precipitate in 100% steam at a temperat...

Embodiment 3

[0052] Spray-free polypropylene material for automotive exteriors, prepared from the following mass percentages of raw materials: 2.3% silver powder, 1.2% pearl powder, 3% ethylene-ethyl acrylate, 9% modified talc, 0.25% triethylene Alcohol ether-bis(3-tert-butyl-4-hydroxy-5-methylphenyl) propionate, 0.3% N,N'-ethylene bisstearamide, 6% polymer type phosphorus-containing flame retardant , 0.2% 1-bromo-5,5-dimethyl hydantoin, 0.25% 5-chloro-2-(((dimethylamino)methylene)amino)benzophenone, the balance is polypropylene.

[0053] The modified talc powder was prepared by the following method: 100g talc powder was added to 1000g deionized water, and then 25.2g ammonium carbonate and 4.7g cerium nitrate were added at a rotational speed of 300r / min for 10min, and then 0.06mol / L hydrochloric acid Adjust the pH to 4, continue stirring at a temperature of 90°C at 300r / min for 60 minutes, centrifuge at a speed of 6000r / min for 20 minutes, and roast the precipitate in 100% steam at a temperat...

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Abstract

The invention relates to a spray-free polypropylene material for automotive exterior decorations and a preparation technology thereof. The spray-free polypropylene material for the automotive exteriordecorations is prepared from the following raw materials in percent by mass: 1.5-3% of a metal powder , 0.5-2% of a pearl powder, 5-15% of a talcum powder, 0.1-0.4% of triethylene glycol ether-bis(3-tert-butyl-4-hydroxy-5-methylphenyl)propionate, 0.2-0.4% of N, N'-ethylene bisstearamide, 3-8% of a flame retardant, 0.1-0.3% of 1-bromo-5, 5-dimethylhydantoin, 0.1-0.4% of an ultraviolet absorbent and the balance of polypropylene. The spray-free polypropylene material for the automotive exterior decorations has good luster and metal texture, and the appearance effect thereof is similar to the painting effect; the process is greatly simplified; the preparation technology is simple; the equipment requirements are low; the product yield rate is high; the surface quality of the spray-free material is obviously improved; the problems of surface blurring, gas mark and skin layering phenomena in the injection moulding process thereof are solved; the using requirements thereof in automotive interior and exterior decorations are met.

Description

Technical field [0001] The invention relates to a polypropylene material, in particular to a spray-free polypropylene material for automobile exterior decoration and a preparation process thereof. Background technique [0002] Spray-free polypropylene composite material is a new type of material that can achieve spraying effects through direct injection molding without spraying. The preparation method of this kind of spray-free polypropylene composite material is mainly to achieve its special color effect by filling special effect pigments such as metal pigments and pearlescent pigments in the resin substrate. Its parts have the characteristics of gorgeous colors, which can meet the customers' increasing diversified and personalized demand for products. In addition, the spray-free polypropylene composite material not only avoids the spraying process that pollutes the environment and operators, improves production efficiency and reduces the overall cost of the parts. The parts ca...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/08C08K3/08C08K3/34C08K5/134C08K5/20C08K9/02C08K3/22C08K13/06
CPCC08L23/12C08K2003/0806C08K2003/2244C08L23/0869C08K3/08C08K3/34C08K5/1345C08K5/20C08K9/02C08K3/22C08K13/06
Inventor 陈昭
Owner 陈昭
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