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Low-linear expansion scratch-resistant highlight polypropylene composite material

A low linear expansion, composite material technology, applied in the field of low linear expansion, scratch-resistant, high-gloss polypropylene composite materials, can solve the problem that the surface gloss is difficult to meet the high gloss requirements, the composite material does not have weather resistance, and the surface of the product is difficult to meet. Easy to crack and other problems, to achieve the effect of convenient control and optimization, good rigidity and toughness, and low production cost

Inactive Publication Date: 2014-04-30
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composite material does not have weather resistance, and the gloss of the surface is still difficult to meet the high gloss requirement; at the same time, due to the addition of the toughening agent, the surface hardness of the product decreases, and it is easy to be scratched by hard objects, which affects the appearance of the product
[0006] Chinese invention patent CN102250413 A discloses a high-gloss, low-shrinkage modified polypropylene composite material and its preparation method. This patent uses polypropylene and polystyrene Blending and adding barium sulfate inorganic mineral reinforcement at the same time prepared a polypropylene composite material with low shrinkage and high gloss. However, due to the large internal stress of styrene, the surface of the product is easy to crack, and cracks will lose gloss and affect its appearance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh 50 parts of dry homopolypropylene and 40 parts of compatibilizer PP-g-MAH according to the weight ratio, and add them to the internal mixing room with a temperature of 190 ° C and a speed of 60 rpm for 2 minutes, and then add dry phenolic 50 parts of resin, 0.1 part of antioxidant 1010, 0.1 part of antioxidant DSTDP, 0.1 part of nucleating agent NA-11, 0.1 part of lubricant N,N'-ethylene bisstearamide, 0.2 parts of silicone powder Parts, black masterbatch PE2772 is 2 parts and banburying for 5min, then adding curing agent HMTA to 5 parts and banburying for 1min, then adding the uniformly mixed material into the twin-screw extruder, through melt extrusion, and then through After water-cooling, it is cut into particles with a length of 1-5mm by a granulator to obtain the final product. Among them, the processing temperature of the extruder is 180°C, 195°C, 210°C, 210°C, and 220°C from the feeding port to the die port in sequence, the speed of the main machine is 70r...

Embodiment 2

[0035] Weigh 55 parts of dry homopolypropylene according to the weight ratio, and add 30 parts of compatibilizer PP-g-GMA into a banburying room with a temperature of 190 ° C and a speed of 60 rpm for 2 minutes, and then add dry phenolic 40 parts of resin, 0.2 parts of antioxidant 1010, 0.2 parts of antioxidant DSTDP, 0.2 parts of nucleating agent NA-11, 0.2 parts of lubricant N,N'-ethylene bisstearamide, 5 parts of black masterbatch 1 part, carry out banburying for 10 minutes, then add 5 parts of curing agent HMTA and banburying for 5 minutes, then put the evenly mixed material into the twin-screw extruder, melt and extrude, and then after water cooling, cut by pelletizer Particles with a length of 1-5mm are grown to obtain the final product. Among them, the processing temperature of the extruder is 180°C, 195°C, 210°C, 210°C, 220°C from the feeding port to the die port in sequence, the main engine speed is 65rpm, and the vacuum degree is 0.3MPa.

Embodiment 3

[0037] Weigh 60 parts of dry homopolypropylene according to the weight ratio, and add 20 parts of compatibilizer PP-g-GMA into a banburying room with a temperature of 190 ° C and a speed of 60 rpm for 5 minutes, and then add dry phenolic 30 parts of resin, 0.2 part of antioxidant 1010, 0.2 part of antioxidant 168, 0.2 part of nucleating agent TMA-3, 0.2 part of lubricant N,N'-ethylene bisstearamide, banburying for 1 minute, Then add 3 parts of curing agent HMMM and banbury for 5 minutes, then put the homogeneous banbury material into the twin-screw extruder, melt and extrude, and then water-cooled, cut into 1-5mm length by pelletizer particles to obtain the final product. Among them, the processing temperature of the extruder is 180°C, 195°C, 210°C, 210°C, 220°C from the feeding port to the die port in sequence, the main engine speed is 75rpm, and the vacuum degree is 0.3MPa.

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Abstract

The invention discloses a low-linear expansion scratch-resistant highlight polypropylene composite material and a preparation method thereof. The composite material is prepared from the following components in parts by weight: 50-80 parts of polypropylene, 10-50 parts of phenolic resin, 1-5 parts of curing agent, 10-40 parts of compatilizer, 0.1-0.4 part of antioxidant, 0.1-0.3 part of nucleating agent, 0.1-0.3 part of lubricating agent and 0-5 parts of other aids. The composite material has the characteristics of high glossiness, low linear expansion coefficient and scratch resistance and has high bending modulus and tensile strength of inorganic filler enhanced polypropylene composite material. Moreover, the preparation process is controllable, the production cost is low, and secondary pollution is avoided.

Description

[0001] technical field [0002] The invention belongs to the technical field of polymer composite materials, and in particular relates to a low linear expansion, scratch-resistant and high-gloss polypropylene composite material. [0003] technical background [0004] Polypropylene (PP) material is widely used due to its low density, excellent heat resistance, good bending fatigue resistance and low price. However, PP has poor low-temperature toughness and creep resistance, large molding shrinkage, poor dimensional stability and scratch resistance. Therefore, ordinary PP materials cannot be directly used to produce high-gloss, wear-resistant precision parts. Proper modification is required to achieve high-gloss, low-linearity and scratch-resistant polypropylene composite materials. The current production of PP to replace engineering plastics is mainly to adjust the shrinkage rate by adding inorganic minerals, or to increase the strength by adding fibers. However, not only...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L61/06C08K5/00B29B9/06B29C47/92B29C48/92
CPCB29B9/06B29C48/92B29C2948/9258B29C2948/92704C08L23/12C08L61/06C08L2205/03C08L2205/035C08L2312/04C08L51/06B29C48/04B29C48/40B29C48/875B29C2948/9218B29C2948/92371B29C2948/92514B29C2948/9259B29C2948/92885B29C2948/92895
Inventor 杨桂生汪海朱敏
Owner HEFEI GENIUS NEW MATERIALS
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