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Polypropylene-high molecular weight high-density polyethylene-filler blend and preparation method thereof

A high-density polyethylene and high-molecular-weight technology, which is applied in the field of polypropylene-polyethylene-filler blends and their preparation, can solve the problems of high crystallization speed of high-molecular-weight high-density polyethylene, poor toughening effect of polypropylene, and difficulty in injection molding. Large-scale products and other problems, to achieve the effect of easy rigidity and toughness balance, improved compatibility, and good cost performance

Active Publication Date: 2016-04-06
昆山博富新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In Chinese patents CN1394907A and CN1948379B, ultra-high molecular weight polyethylene and polypropylene are blended. Due to the large molecular weight of ultra-high molecular weight polyethylene, the melt fluidity is zero, and the ultra-high molecular weight polyethylene is dispersed in the polypropylene matrix like a filler to strengthen effect, but its fluidity is extremely poor, it is difficult to be used for injection molding large-scale products, and the price of ultra-high molecular weight polyethylene is much higher than that of ordinary polyethylene
However, compared with rubber, high-molecular-weight high-density polyethylene has a fast crystallization speed, high crystallinity, poor compatibility with high-fluidity polyethylene, and poor toughening effect on polypropylene

Method used

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  • Polypropylene-high molecular weight high-density polyethylene-filler blend and preparation method thereof
  • Polypropylene-high molecular weight high-density polyethylene-filler blend and preparation method thereof
  • Polypropylene-high molecular weight high-density polyethylene-filler blend and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Take homopolymeric PP1650g with a melt index of 30g / min, HWM-HDPE (density of 0.945g / cm 3 , molecular weight is 250000, melt index is 12g / min) 450g, calcium carbonate 600g, EPDM150g, PP-g-MAH150g, titanate coupling agent 15g, antioxidant (antioxidant 1010: antioxidant 168=0.5: 1) 0.6g; firstly mix the titanate coupling agent and calcium carbonate at high speed, then add the homopolymeric PP, HWM-HDPE, EPDM, PP-g-MAH and antioxidant into the mixer in turn to The speed of 1000 rpm is mixed uniformly, and then the mixed material is extruded and pelletized in a twin-screw extruder, and the pelletizing temperature is 160°C. After drying, injection molding into standard splines, and performance testing. The performance index test results of the obtained blend A2 are shown in Table 1.

Embodiment 2

[0027] Take homopolymeric PP900g with a melt index of 40g / min, HMW-HDPE (density of 0.945g / 10cm) 3 , molecular weight is 300000, melt index is 10g / min) 750g, talc 900g, EPDM132g, POE88g, PP-g-MAH135g, PE-g-MAH (polyethylene grafted maleic anhydride) 67.5g, aluminate coupling agent 22.5g, antioxidant (antioxidant 1010: antioxidant 168=1:1) 0.9g; firstly mix aluminate coupling agent and talcum powder at high speed, then mix homopolymeric PP, HMW-HDPE , EPDM, POE, PP-g-MAH, PE-g-MAH and antioxidants, etc. were added to the mixer in turn, mixed uniformly at a speed of 800 rpm, and then the mixed materials were put into the twin-screw extruder. Medium extrusion granulation, granulation temperature is 180 ℃. After drying, injection molding into standard splines, and performance testing. The performance index test results of the obtained blend B2 are shown in Table 1.

Embodiment 3

[0031]Take copolymerized PP1650g with melt index of 30g / min, HMW-HDPE (density of 0.945g / 10cm) 3 , molecular weight is 400000, melt index is 8g / min) 450g, mica powder 600g, propylene-based elastomer 90g, LLDPE (linear low density polyethylene) 60g, PP-g-MAH135g, silane coupling agent 15g, antioxidant (Antioxidant 1010: Antioxidant 168=1.5:1) 0.6g; firstly mix silane ester coupling agent and mica powder at high speed, and then mix copolymerized PP, HMW-HDPE, propylene-based elastomer, LLDPE, PP -g-MAH and antioxidants are added to the mixer in turn, mixed uniformly at a speed of 600 rpm, and then the mixed materials are extruded and granulated in a twin-screw extruder, and the granulation temperature is 200 ℃ . After drying, injection molding into standard splines, and performance testing. The performance index test results of the obtained blend C2 are shown in Table 1.

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Abstract

The invention discloses a polypropylene-high molecular weight high density polyethylene-filling material blend which comprises, by weight, 30 to 80 parts of polypropylene, 5 to 25 parts of high molecular weight high density polyethylene, 10 to 30 parts of a filling material, 2 to 8 parts of a compatilizer, 2 to 8 parts of a compatilizing agent and 0.01 to 0.03 part of an anti-oxidant. Polypropylene, high molecular weight high density polyethylene, the compatilizer, the compatilizing agent, the filling material and the anti-oxidant are successively added into a mixer and uniformly mixed at a speed of 500 to 1000 r / min, and a mixed material is put in a double-screw extruder for extrusion and granulation with granulation temperature being 160 to 210 DEG C. Compared with a conventional polypropylene-rubber-filling material blend, the polypropylene-high molecular weight high density polyethylene-filling material blend provided by the invention has excellent balanced rigidity and toughness, compatibility and better cost performance under the condition of a small usage amount of rubber.

Description

technical field [0001] The present invention relates to a polypropylene-polyethylene-filler blend and a preparation method thereof, in particular to a polypropylene-high molecular weight high-density polyethylene-filler blend and a preparation method thereof. Background technique [0002] Polypropylene (PP) is easy to be modified by copolymerization, blending, filling and reinforcement due to its low density, good impact resistance, non-toxicity, strong chemical corrosion resistance, excellent electrical insulation properties and easy processing, and it is cost-effective. And widely used in home appliances, automobiles, packaging and chemical fiber and other fields. Compared with resins such as polystyrene (PS) and acrylonitrile-styrene-butadiene (ABS), polypropylene has poor rigidity and usually needs to be reinforced by filling minerals, but the filling of minerals often causes a decrease in toughness. Therefore, it needs to be toughened by a certain substance. At present...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/14C08L23/08C08L23/16C08L51/06C08K9/04C08K9/06C08K3/34C08K3/26C08K5/134C08K5/526
Inventor 廖宇涛
Owner 昆山博富新材料科技有限公司