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Polypropylene-high molecular weight high density polyethylene-filling material 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: 2013-05-01
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-filling material blend and preparation method thereof
  • Polypropylene-high molecular weight high density polyethylene-filling material blend and preparation method thereof
  • Polypropylene-high molecular weight high density polyethylene-filling material blend and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Get the homopolymeric PP 1650g that melt index is 30g / min, HWM-HDPE (density is 0.945g / cm 3 , molecular weight is 250000, melt index is 12g / min) 450g, calcium carbonate 600g, EPDM 150g, PP-g-MAH 150g, titanate coupling agent 15g, antioxidant (antioxidant 1010: antioxidant 168= 0.5:1) 0.6g; first mix titanate coupling agent and calcium carbonate at high speed, then add homopolymer PP, HWM-HDPE, EPDM, PP-g-MAH and antioxidant into the mixer in sequence , mixed uniformly at a speed of 1000 rpm, and then the mixed material was extruded and granulated in a twin-screw extruder, and the granulation temperature was 160°C. After drying, it is injected into a standard sample and tested for performance. The performance index test results of the obtained blend A2 are shown in Table 1.

Embodiment 2

[0027] Get the homopolymeric PP 900g that melt index is 40g / min, HMW-HDPE (density is 0.945g / 10cm 3 , molecular weight 300000, melt index 10g / min) 750g, talc powder 900g, EPDM 132g, POE 88g, PP-g-MAH 135g, PE-g-MAH (polyethylene grafted maleic anhydride) 67.5g, aluminum acid Ester coupling agent 22.5g, antioxidant (antioxidant 1010: antioxidant 168=1: 1) 0.9g; Aluminate coupling agent and talcum powder are mixed at high speed first, then homopolymerized PP, Add HMW-HDPE, EPDM, POE, PP-g-MAH, PE-g-MAH and antioxidants into the mixer in turn, mix evenly at a speed of 800 rpm, and then mix the mixed materials in the twin-screw Extrude and granulate in an extruder, and the granulation temperature is 180°C. After drying, it is injected into a standard sample and tested for performance. The performance index test results of the obtained blend B2 are shown in Table 1.

Embodiment 3

[0031]Get the copolymerization type PP 1650g that melt index is 30g / min, HMW-HDPE (density is 0.945g / 10cm 3 , molecular weight 400000, melt index 8g / min) 450g, mica powder 600g, propylene-based elastomer 90g, LLDPE (linear low density polyethylene) 60g, PP-g-MAH 135g, silane coupling agent 15g, antioxidant agent (antioxidant 1010:antioxidant 168=1.5:1) 0.6g; first mix the silane ester coupling agent and mica powder at high speed, and then mix the copolymerized PP, HMW-HDPE, propylene-based elastomer, LLDPE, PP-g-MAH and antioxidants are added to the mixer in turn, mixed evenly at a speed of 600 rpm, and then the mixed material is extruded into granules in a twin-screw extruder, and the granulation temperature is 200 ℃. After drying, it is injected into a standard sample and tested for performance. 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 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 modify through copolymerization, blending, filling and reinforcement due to its low density, good impact resistance, non-toxicity, strong chemical corrosion resistance, excellent electrical insulation performance and easy processing, and it is cost-effective It is widely used in home appliances, automobiles, packaging and chemical fiber and other fields. Compared with polystyrene (PS), acrylonitrile-styrene-butadiene (ABS) and other resins, polypropylene has poor rigidity and usually needs to be enhanced by filling minerals, but mineral filling often causes toughness to decrease. Therefore, some kind of substance needs to be used for toughening. At present, rubber is ...

Claims

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Application Information

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Patent Type & Authority Applications(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
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