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High-shading polypropylene composition and preparation method thereof

A polypropylene composition, high shading technology, applied in the field of modified materials, can solve the problems of material mechanical properties decline, high addition amount, limit material application, etc., achieve compatibility improvement, less addition amount, good shading effect Effect

Pending Publication Date: 2022-03-01
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Adding titanium dioxide to polypropylene materials is a common practice to improve the shading performance of polypropylene, but in order to improve the shading effect, the addition of titanium dioxide is often high, which directly leads to the decline of the mechanical properties of the material and limits the application of the material

Method used

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  • High-shading polypropylene composition and preparation method thereof
  • High-shading polypropylene composition and preparation method thereof
  • High-shading polypropylene composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 60 parts of medium-fluidity polypropylene, 20 parts of high-fluidity polypropylene, 5 parts of surface-modified nano-titanium dioxide, 5 parts of surface-modified nano-barium sulfate, 0.5 parts of dispersant, 10 parts of toughening agent, and 0.5 parts of antioxidant Add it to a high-speed mixer and mix it at high speed for 5 minutes, then put the uniformly mixed material into a twin-screw extruder, knead, extrude, cool and cut into pellets to obtain the final product. The extrusion temperatures of each extrusion zone in the twin-screw extruder are 165°C, 175°C, 185°C, 195°C, 195°C, 195°C, 200°C, 200°C, 200°C, 200°C respectively. The product performance is shown in Table 1

Embodiment 2

[0032] 70 parts of medium-fluidity polypropylene, 15 parts of high-fluidity polypropylene, 4 parts of surface-modified nano-titanium dioxide, 4 parts of surface-modified nano-barium sulfate, 0.4 parts of dispersant, 7 parts of toughening agent, and 0.5 parts of antioxidant Add it to a high-speed mixer and mix it at high speed for 5 minutes, then put the uniformly mixed material into a twin-screw extruder, knead, extrude, cool and cut into pellets to obtain the final product. The extrusion temperatures of each extrusion section in the twin-screw extruder are 160°C, 170°C, 180°C, 190°C, 190°C, 190°C, 190°C, 195°C, 195°C, 195°C respectively. The product performance is shown in Table 1

Embodiment 3

[0034] 80 parts of medium-fluidity polypropylene, 10 parts of high-fluidity polypropylene, 3 parts of surface-modified nano-titanium dioxide, 2 parts of surface-modified nano-barium sulfate, 0.2 parts of dispersant, 5 parts of toughening agent, and 0.5 parts of antioxidant Add it to a high-speed mixer and mix it at high speed for 5 minutes, then put the uniformly mixed material into a twin-screw extruder, knead, extrude, cool and cut into pellets to obtain the final product. The extrusion temperatures of each extrusion zone in the twin-screw extruder are 155°C, 165°C, 175°C, 185°C, 185°C, 185°C, 185°C, 185°C, 185°C, 190°C respectively. The product performance is shown in Table 1

[0035] The performance detection of the product that each embodiment of table 1 makes

[0036]

[0037]

[0038] Note: The conditions of the above tests and the dimensions of the test strips in Table 1 are as follows:

[0039] Flexural modulus test: sample size 100mm*10mm*4mm, bending speed 2...

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Abstract

The invention discloses a high-shading polypropylene composition and a preparation method thereof. The polypropylene composition is prepared from the following components in parts by mass: 60-80 parts of medium-flowability polypropylene, 10-20 parts of high-flowability polypropylene, 3-5 parts of surface modified nano titanium dioxide, 2-5 parts of surface modified nano barium sulfate, 0.2-0.5 part of a dispersing agent, 5-10 parts of a toughening agent and 0.5 part of an antioxidant. Compared with the traditional titanium dioxide filled modified polypropylene, the polypropylene composition provided by the invention has the advantages that the addition amount of the surface modified nano titanium dioxide and the surface modified nano barium sulfate is small, the material density is small, and the polypropylene composition is more in line with the development trend of light weight of automobiles; under the action of the high-fluidity polypropylene, the mechanical property and the surface gloss of the material are obviously improved, and the comprehensive performance is excellent; in addition, under the combined action of the surface modified nano titanium dioxide and the surface modified nano barium sulfate, the material has a better shading effect.

Description

technical field [0001] The invention belongs to the field of modified materials, in particular to a high light-shielding polypropylene composition and a preparation method thereof. Background technique [0002] With the vigorous development of automobile lightweight in recent years, polypropylene materials are more and more widely used in automobiles. Among them, automobile dashboard, sun visor and pillar are three important parts in automobile interior parts, which not only require materials to have high dimensional stability and mechanical properties, but also require materials to have good astigmatism and shading properties. For instrument panels and pillars, the most important thing is to prevent the material surface from refracting light and affecting the driver's sight; while for sun visors, it is necessary to reduce the light transmittance of the material as much as possible to achieve the optimal shading effect. [0003] Adding titanium dioxide to polypropylene mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L23/12C08K13/06C08K9/10C08K9/04C08K3/30C08K3/22
CPCC08L23/14C08L2205/035C08L2201/08C08K2201/011C08K2003/3045C08K2003/2241C08L23/12C08K13/06C08K9/10C08K9/08C08K3/30C08K3/22
Inventor 杨桂生赵鑫姚晨光邹冲朱敏计娉婷廖雄兵
Owner HEFEI GENIUS NEW MATERIALS
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