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Polyethylene composition capable of being processed and molded, preparation method thereof and polyethylene product

A technology for processing and molding polyethylene, which is applied in the field of polyethylene materials and can solve the problems of polyethylene materials lacking flame retardancy and impact resistance

Active Publication Date: 2020-10-27
NAT INST OF CLEAN AND LOW CARBON ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, there is still a lack of polyethylene materials with good flame retardancy and good impact resistance

Method used

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  • Polyethylene composition capable of being processed and molded, preparation method thereof and polyethylene product
  • Polyethylene composition capable of being processed and molded, preparation method thereof and polyethylene product
  • Polyethylene composition capable of being processed and molded, preparation method thereof and polyethylene product

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Embodiment approach

[0023] In the present invention, relative to 100 parts by weight of the part of high-density polyethylene, the component A is 15-25 parts by weight, the toughening agent is 10-30 parts by weight, and the compatibilizer is 0.5-5 parts by weight , 1-10 parts by weight of antimony trioxide, 2-20 parts by weight of diphenylethane decabromide, and 1-10 parts by weight of polytetrafluoroethylene. Preferably, relative to 100 parts by weight of the part of high-density polyethylene, the toughening agent is 10-20 parts by weight. According to one embodiment, the component A is prepared by melt-blending the antioxidant, the cross-linking agent, the cross-linking auxiliary agent and the remaining high-density polyethylene, and extrusion granulating.

[0024] In the present invention, the density of the high-density polyethylene is greater than 0.945g / cm 3 , preferably 0.95-0.96g / cm 3 . The high density polyethylene is commercially available. Preferably, the high-density polyethylene ...

Embodiment 1

[0052] (1) Weigh 100g of antimony trioxide, 100g of polytetrafluoroethylene, 200g of decabromodiphenylethane, and 3kg of high-density polyethylene DMDA-8007, add them into a high-speed mixer, stir for 3 minutes until they are evenly mixed, and then pass through a high-shear Cut twin-screw extruder melt blending, granulation (the screw length-to-diameter ratio of the twin-screw extruder is 26 / 1, the screw speed is 150 rpm, and the temperature of the screw extrusion blending is 200 ° C), the preparation Into flame retardant masterbatch.

[0053] (2) 2.19kg high-density polyethylene DMDA-8007, 200g crosslinking agent 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane, 200g crosslinking aid triallyl The Irgafos 168 of Irganox 1010 and 10 g of isocyanurate and 10 g was stirred by a high-speed mixer for 3 minutes and mixed, and then melted and blended and granulated by a low-shear twin-screw extruder (the screw of the twin-screw extruder The length-to-diameter ratio is 26 / 1, the screw spe...

Embodiment 2

[0056] (1) Prepare flame retardant masterbatch according to the method of embodiment 1.

[0057] (2) Prepare the cross-linking masterbatch according to the method of Example 1.

[0058] (3) Weigh 2.5kg cross-linking masterbatch, 7kg high-density polyethylene DMDA-8007, 1.5kg metallocene linear low-density polyethylene LLDPE 5220, 300g compatibilizer GR204, and the flame-retardant masterbatch obtained in step (1) Add in the high-speed mixer, stir for 3 minutes to mix evenly, then melt blending and granulation by a low-shear twin-screw extruder (the screw length-to-diameter ratio of the twin-screw extruder is 26 / 1, and the screw speed is 100 rpm / min, the temperature of screw extrusion blending is 140°C), prepared into a polyethylene composition, denoted as M-2.

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Abstract

The invention relates to the field of polyethylene materials, and discloses a polyethylene composition capable of being processed and molded, a preparation method thereof and a polyethylene product. The polyethylene composition provided by the invention comprises the following melt-blended components: a component A, a toughening agent, part of high-density polyethylene, a compatilizer, antimonousoxide, 1,2-Bis(pentabromophenyl) ethane and polytetrafluoroethylene, wherein the component A comprises an antioxidant, a cross-linking agent, a cross-linking aid and the balance of high-density polyethylene; the flexibilizer is metallocene linear low density polyethylene, and the compatilizer is polyethylene grafted maleic anhydride and / or polyolefin elastomer grafted maleic anhydride. According to the polyethylene composition provided by the invention, the impact resistance of the polyethylene product can be remarkably improved on the basis of meeting the flame retardant property requirement.

Description

technical field [0001] The invention relates to the field of polyethylene materials, in particular to a processable polyethylene composition, a preparation method thereof, and a polyethylene product. Background technique [0002] Polyethylene accounts for about 95% of the rotomolding material market, but because it is extremely flammable, it cannot meet specific occasions that require high flammability, and must be modified. Flame retardants are usually added to achieve flame retardant modification. If a large amount of flame retardants is added, the mechanical properties and fluidity of the material will be reduced, which cannot meet the requirements of rotational molding processing or use. In particular, the low-temperature impact performance of the product should also be considered in the use environment in severe cold regions. [0003] CN104356467A discloses a flame-retardant polyethylene composition and its preparation method and product. First melt blend chlorinated ...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/08C08L51/06C08L27/18C08K13/02C08K3/22C08K5/03C08K5/14C08J3/22
CPCC08J3/226C08L23/06C08L2201/02C08L2205/035C08L2207/062C08J2323/06C08J2423/06C08L23/0815C08L51/06C08L27/18C08K13/02C08K3/2279C08K5/03C08K5/14
Inventor 李亚飞孙小杰梁文斌陈兰兰任月庆孙苗苗
Owner NAT INST OF CLEAN AND LOW CARBON ENERGY