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Polyethylene geomembrane resin composition and preparation method thereof

A technology of resin composition and geomembrane, which is applied in the field of polyethylene resin composition, can solve the problem of "fish eyes" in the film, and achieve the effects of significant reinforcement effect, improved melt strength, and controllable crosslinking degree

Active Publication Date: 2012-04-11
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large thickness of the geomembrane, the melt strength of the resin is required to be high. However, the melt strength of the LLDPE resin is greatly improved without causing more "fish eyes" in the film, and by adding the second component LLDPE graft copolymer There are no relevant reports on the preparation of special resin compositions for wide-width geomembranes with high strength and good barrier properties.

Method used

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  • Polyethylene geomembrane resin composition and preparation method thereof
  • Polyethylene geomembrane resin composition and preparation method thereof
  • Polyethylene geomembrane resin composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Preparation of LLDPE-g-PS: Take 0.8 parts of DCP and 1.6 parts of acetone and mix them in a beaker, then mix the mixed solution with 100 parts of LLDPE (101AA), 15 parts of PS (666D) and 0.15 parts of anti Put oxygen agent 1010 and 0.15 parts of calcium stearate into a 10L high-speed mixer together, mix at high speed for 5 minutes, and put the mixed material into a Φ67 twin-screw extruder at a reaction temperature of 170-220°C and a reaction time of 9 minutes. Melt-grafting reaction was carried out under , cooled and granulated to obtain LLDPE-g-PS (grafting rate: 3.9%).

[0054] (2) Preparation of polyethylene geomembrane resin composition: Mix 0.43 parts of TB and 0.03 parts of TBPB with 0.9 parts of acetone solvent, then add 5 parts of LLDPE (101AA), and mix in a 10-liter high-speed mixer for 3 minutes to prepare Premix masterbatch, take out 15 parts of LLDPE-g-PS and premix masterbatch, 95 parts of LLDPE (101AA), 0.1 part of antioxidant 1010, 0.1 part of calcium...

Embodiment 2

[0056] (1) Preparation of LLDPE-g-PS: Take 1.1 parts of TBPA and 2.6 parts of acetone and mix them in a beaker, then mix the mixed solution with 100 parts of LLDPE (7042), 22 parts of PS (492J) and 0.1 part of anti Put oxygen agent 1010 and 0.1 part of zinc stearate together in a 10L high-speed mixer, mix at high speed for 5 minutes, and put the mixed material into a Φ67 twin-screw extruder at a reaction temperature of 170-220°C and a reaction time of 9 minutes. Melt-grafting reaction was carried out under , cooled and granulated to obtain LLDPE-g-PS (grafting rate: 5.2%).

[0057] (2) Preparation of polyethylene geomembrane resin composition: After mixing 0.41 parts of TB and 0.05 parts of TBPB with 1.1 parts of xylene solvent, then add 7 parts of LLDPE (7042), and mix in a 10-liter high-speed mixer for 3 minutes to prepare into a premix masterbatch, take out 19 parts of LLDPE-g-PS (grafting rate: 5.2%) and premix masterbatch and 93 parts of LLDPE (7042) and 0.25 parts of ant...

Embodiment 3

[0059] (1) The preparation of LLDPE-g-PS is completely the same as in Example 1.

[0060] (2) Preparation of polyethylene geomembrane resin composition: Mix 0.38 parts of TB and 0.07 parts of TBPB with 0.9 parts of toluene solvent, then add 5 parts of LLDPE (101AA), and mix in a 10-liter high-speed mixer for 3 minutes to prepare Premix masterbatch, take out 22 parts of LLDPE-g-PS (graft rate: 3.9%) and premix masterbatch and 95 parts of LLDPE (101AA) and 0.15 part of antioxidant 1010, 0.05 part of calcium stearate from the feeding port Add them together into the extruder, and react for 2 minutes under the condition of the cylinder temperature of 165-200°C, and finally prepare a solution of 0.021 parts of BPO and 0.05 parts of toluene solvent, and drop them into the plasticizing section of the extruder. The cylinder temperature is 200-230° C., after extrusion reaction for 17 seconds, cooling and granulation to prepare polyethylene geomembrane resin composition. The composition...

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Abstract

The invention discloses a polyethylene geomembrane resin composition. Taking the weight of linear low density polyethylene (LLDPE) as 100%, the resin composition comprises: LLDPE fusant, wherein the flow rate of the fusant is 0.5-10 g / 10min; (2) 0.17%-0.51% of a complex cross-linking additive composed of 1,1-dimethylethyl-hydrogen peroxide and peroxide tert-butyl benzoate; (3) 0.017%-0.032% of benzoyl peroxide (BPO); and (4) 11%-35% of LLDPE-g-PS graft copolymer. With the adoption of the composition, the gradually enlarging of an LLDPE microcrosslinking structure is realized, the occurrence of gelling is avoided, and broad-width geomembrane with few fish eyes, high strength and good barrier property can be stably produced by blowing without any mixing, wherein the thickness of the geomembrane is thicker than or equal to 0.5 mm, and the breadth of the geomembrane is 5-8 mm. The application of the LLDPE in the fields, such as agriculture, water conservancy, transportation, environmentalprotection and port construction and the like is enlarged. The invention further discloses a preparation method of the resin composition.

Description

technical field [0001] The invention relates to a polyethylene resin composition, in particular to micro-crosslinking modified linear low density polyethylene (LLDPE) with an organic peroxide and adding the second component LLDPE-g-PS graft copolymer, blown out A wide-width geomembrane resin composition with high strength and good barrier properties and a preparation method thereof. Background technique [0002] As we all know, geomembrane is called the "fourth building material" after steel, cement and wood. Since it was introduced into my country in the 1970s, it has been widely used in fields such as agriculture, water conservancy, transportation, environmental protection and port construction, and has played a role in saving water resources and preventing environmental pollution. After entering the 1980s, with the vigorous development of my country's polyethylene industry, it brought essential changes to the development of geomembranes. Due to its low price, excellent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L87/00C08K5/14C08J3/24B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/92B29C2948/92561B29C2948/92704B29C2948/92895B29C2948/9298
Inventor 徐典宏刘鹏王洪山李锦山陈红牛承祥梁天珍梁滔李晶何连成
Owner PETROCHINA CO LTD
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