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Coating-free polypropylene composition with paint brightness and metal texture and preparation method thereof

A polypropylene composition and metal texture technology, applied in the field of modified plastics, can solve the problems of no metal effect, no paint gloss, easy residual monomers in the paint, etc., and achieve good paint gloss and metal texture, The effect of simplified process and high product yield

Active Publication Date: 2012-07-18
WUHAN JINFA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method still requires a spraying process, and the coating is prone to residual monomers, causing air pollution in the car
CN101392077A discloses a polypropylene coloring masterbatch with pearlescent interference effect, which is used for the processing of polypropylene products, but this kind of color masterbatch with pearlescent interference effect can not produce metallic effect, and will not have paint luster

Method used

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  • Coating-free polypropylene composition with paint brightness and metal texture and preparation method thereof
  • Coating-free polypropylene composition with paint brightness and metal texture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A spray-free polypropylene composition with a glossy metallic texture of paint, prepared by the following method:

[0039] According to the formula in Table 1, homopolypropylene, flaky aluminum powder (with a particle size of 5 μm), and titanium dioxide-coated mica (with a purity of 95% and a particle size of 10 μm) were weighed. Mix homopolypropylene, flake aluminum powder, and titanium dioxide-coated mica in a mixer for 1 to 3 minutes at a speed of 800 to 1500 rpm to obtain a premix; the premix is ​​melted by a twin-screw extruder Extrusion, the temperature of each zone of the screw is 190-250 ℃, and vacuum granulation to make polypropylene with glossy paint and no spraying.

[0040] Evaluate the paint luster and metallic texture of the injection molded samples, and the specific evaluation grades are listed in Table 1.

Embodiment 2

[0042] A spray-free polypropylene composition with a glossy metallic texture of paint, prepared by the following method:

[0043] According to the formula in Table 1, homopolypropylene, ethylene-propylene copolymer, talcum powder, flake aluminum powder (50 μm in particle size), and mica coated with titanium dioxide (98% in purity and 50 μm in particle size) were weighed. Mix polypropylene and elastomer in a high mixer for 1 to 3 minutes, then add talcum powder, flake aluminum powder, titanium dioxide-coated mica and mix for 1 to 3 minutes at a speed of 800 to 1500 rpm to obtain The premixed material is melted and extruded by a twin-screw extruder, and the temperature of each zone of the screw is 190-250 ° C. Vacuum granulation is used to obtain the glossy and spray-free polypropylene.

[0044] Evaluate the paint luster and metallic texture of the injection molded samples, and the specific evaluation grades are listed in Table 1.

Embodiment 3

[0046] A spray-free polypropylene composition with a glossy metallic texture of paint, prepared by the following method:

[0047] According to the formula in Table 1, homopolypropylene, ethylene-octene copolymer, talcum powder, flake aluminum powder (100 μm in particle size), and titanium dioxide-coated mica (98% in purity and 80 μm in particle size) were weighed. The mixing method and preparation method were the same as in Example 2, and the paint gloss and metallic texture of the injection molded samples were evaluated, and the specific evaluation grades were listed in Table 1.

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Abstract

The invention discloses a coating-free polypropylene composition with paint brightness and metal texture, which is prepared from the following components in percentage by mass: 50-99.8% of polypropylene, 0-20% of elastomer, 0-30% of talc powder, 0.1-2% of sheet-shaped aluminum powder and 0.1-2% of color brighter, wherein the mass ratio of the sheet-shaped aluminum powder to the color brighter is 1:(2-5). The coating-free polypropylene composition with paint brightness and metal texture can be directly made into a component through injection molding, wherein the component has excellent paint brightness and metal texture, and the appearance effect of the component is close to a paint coating effect. The preparation method of the coating-free polypropylene composition with paint brightness and metal texture has the advantages of avoiding complex operation of the traditional paint coating technique, greatly simplifying operation steps, being simple in preparation process, having low device requirement and high product yield, saving energy, protecting environment and reducing cost.

Description

technical field [0001] The invention belongs to the field of modified plastics, and in particular relates to a polypropylene composition, in particular to a spray-free polypropylene composition with a glossy metallic texture of paint and a preparation method and application thereof. Background technique [0002] Plastics play an irreplaceable role in other materials in terms of car aesthetics, comfort, safety, anti-corrosion, lightweight and design freedom. Among the many plastic varieties used in automobiles, the development and application of modified PP materials in automobiles has always been the focus of attention of the automobile industry and the plastics industry. Modified PP materials that meet the different functional requirements of various automotive parts can be obtained through various modification processing methods. In addition to its excellent cost performance, various toughened, filled and reinforced PP materials have been obtained in the major assembly sys...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/14C08K13/06C08K9/10C08K3/34C08K3/08C08K3/22B29C47/92B29C48/92
Inventor 杨波李永华陈锐李晟吴国峰罗忠富陈延安黄达丁超
Owner WUHAN JINFA TECH CO LTD
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