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High-rigidity polypropylene composite without flow marks as well as preparation method of polypropylene composite

A technology of polypropylene and no flow marks, which is applied in the field of high-rigidity non-flow mark polypropylene composites and its preparation. , the effect of accelerating the cooling rate

Inactive Publication Date: 2014-03-05
SHANGHAI KINGFA SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] What the present invention aims to solve is the technical problem that existing polypropylene composites are prone to flow marks and affect appearance

Method used

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  • High-rigidity polypropylene composite without flow marks as well as preparation method of polypropylene composite
  • High-rigidity polypropylene composite without flow marks as well as preparation method of polypropylene composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 92 kg of polypropylene PP HP500N (CNOOC Shell), 1 kg of erucamide, 1 kg of acrylamide, 1 kg of LLDPE grafted with maleic anhydride graft Bondyram4108 in a twin-screw extruder with a length-to-diameter ratio of 40:1 Medium melt mixing and dispersion, 5 kg of 3000-mesh talc powder is fed into the twin-screw extruder from the side through a weight-loss weighing scale, and the temperature of each section of the extruder is set at 190-225 ° C, extruded and granulated, and finally the product is obtained.

[0022] Test its performance according to the corresponding standards, the list is as follows:

[0023] Table 1

[0024] performance

[0025] The uniformity of the surface gloss of the sample sheet is obviously improved by adding the low-flow mark substance, the appearance quality of the sample is improved, and the dispersibility of the filler and the compatibility with the resin are improved at the same time. Therefore, the bending modulus and bending strength o...

Embodiment 2

[0027] 75.5 kilograms of polypropylene PP T30S (Daqing Petrochemical Company), 0.5 kilograms of erucamide, 1.5 kilograms of ethylene bisstearamide, 1 kilogram of HDPE grafted maleic anhydride graft Bondyram5101, 0.2 kilograms of phenolic antioxidant 1010, 0.2 kg of phosphite antioxidant 168, 0.6 kg of processing aid EBS, and 0.5 kg of light stabilizer 770 were melt-mixed and dispersed in a twin-screw extruder with a length-to-diameter ratio of 40:1, and 20 kg of 3000-mesh talcum powder passed through the weight loss process. The type weighing scale is fed into the twin-screw extruder from the side, and the temperature of each section of the extruder is set at 190-225 ° C, extruded and granulated, and finally the product is obtained.

[0028] Test its performance according to the corresponding standards, the list is as follows:

[0029] Table 2

[0030] performance

[0031] By adding low-flow mark substances, the surface gloss of the final product is improved, and ap...

Embodiment 3

[0033] 62 kg of polypropylene PP YPJ-3860 (Yangzi Petrochemical), 1.5 kg of stearic acid amide, 2.5 kg of behenic acid amide, 0.5 kg of ethylene-octene copolymer maleic anhydride graft 493D, 0.5 kg of polypropylene Nuclear agent HPN-20E, 0.5 kg of phenolic antioxidant 1010, 0.5 kg of phosphite antioxidant 627A, 1 kg of processing aid calcium stearate, 1 kg of light stabilizer 944 in a 40:1 aspect ratio Melt, mix and disperse in the twin-screw extruder. 30 kg of 3000-mesh talc powder is fed into the twin-screw extruder from the side through a weight-loss weighing scale. Finally get the product.

[0034] Test its performance according to the corresponding standards, the list is as follows:

[0035] table 3

[0036] performance

[0037] By adding low-flow-mark substances and nucleating agents to eliminate the flow-mark appearance defects of the final sample, the appearance quality of the part is greatly improved. At the same time, the tensile strength, flexural stren...

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Abstract

The invention discloses a polypropylene composite for a fender as well as a preparation method of the polypropylene composite. The polypropylene composite is prepared from 42-92wt% of polypropylene, 2-5wt% of an oligomer with few flow marks, 1-5wt% of a polar monomer graft olefin polymer, 0-2wt% of a special nucleating agent for polypropylene, 0-4wt% of a processing aid, 0-2wt% of a light stabilizer and 5-40wt% of talcum powder. The preparation method comprises the following steps: melting, mixing and dispersing the polypropylene, the oligomer with few flow marks, the polar monomer graft olefin polymer, the special nucleating agent for polypropylene, the processing aid and the light stabilizer in a double-screw extruder; feeding the talcum powder into the double-screw extruder from one side by an agravic metering balance; and extruding and granulating, thereby finally obtaining the product, namely the polypropylene composite. The polypropylene composite has the characteristics of high rigidity, high gloss and no flow marks and meets the requirements of large-sized polypropylene parts on appearance, and polypropylene injection molded parts have no flow marks.

Description

technical field [0001] The invention relates to a high-rigidity non-flow mark polypropylene composite and a preparation method thereof, which belong to the field of polymer materials and their molding processing. Background technique [0002] Polypropylene material is cheap, has excellent electrical insulation and chemical corrosion resistance, mechanical properties and heat resistance are the highest among general-purpose thermoplastics, and has good fatigue resistance. Polypropylene has excellent processing performance, and various processing methods can be used to produce products that meet different purposes. Polypropylene is used in a large amount in injection molding products. General daily necessities are mainly ordinary polypropylene, and other uses are mainly reinforced or toughened polypropylene. For example: toughened polypropylene is used for automobile bumpers and wheel housing covers, while reinforced polypropylene is used for steering wheels, fan blades, hand...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L51/06C08K13/02C08K3/34B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/92C08L23/12B29B9/06B29C2948/92704C08L23/14C08L2205/03C08L51/06C08K13/02C08K3/34C08K5/20
Inventor 赵斌周英辉孙刚程文超陈延安
Owner SHANGHAI KINGFA SCI & TECH
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