Cross-linkable grafted polyethylene composition, cross-linked grafted polyethylene product, preparation method and product

A technology for cross-linking grafted polyethylene, which is applied in the fields of cross-linked grafted polyethylene compositions and cross-linked grafted polyethylene products, can solve problems such as short scorch time, and achieve good processing application and safe processing Window, Favorable Effects of Preparation

Active Publication Date: 2019-12-10
神华(北京)新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of how to process high melt index polyethylene to obtain a product with a high degree of crosslinking, and to provide a crosslinkable grafted polyethylene composition, a crosslinked grafted polyethylene composition, and a short scorch time during processing. Polyethylene product and preparation method and product

Method used

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  • Cross-linkable grafted polyethylene composition, cross-linked grafted polyethylene product, preparation method and product
  • Cross-linkable grafted polyethylene composition, cross-linked grafted polyethylene product, preparation method and product
  • Cross-linkable grafted polyethylene composition, cross-linked grafted polyethylene product, preparation method and product

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preparation example Construction

[0037] The present invention also provides a preparation method of the cross-linked grafted polyethylene product of the present invention, comprising: (1) mixing polyethylene, cross-linking agent, cross-linking auxiliary agent, stabilizer, processing improver, antioxidant and lubricating The agent is mixed evenly, and melt blending is carried out at 140-150°C to obtain a cross-linkable grafted polyethylene composition with a gel content of 0% by weight; wherein, the polyethylene is melted at 190°C under a load of 2.16kg The index is more than 30g / 10min; (2) the cross-linkable grafted polyethylene composition obtained in step (1) is molded under processing conditions, and cross-linked grafted polyethylene products are obtained through cross-linking and grafting reactions; Wherein, the processing conditions include: the processing temperature is 200-210° C., and the scorch time at the processing temperature is 2.8 min or more.

[0038] Preferably, the polyethylene has a melt ind...

Embodiment 1

[0068] (1) 100 parts by weight of polyethylene (2650), 0.8 parts by weight of 2,5-dimethyl-2,5-di(tert-butylperoxy)-3-hexyne, 0.4 parts by weight of TAIC, 0.1 parts by weight of tris (2,2,6,6-tetramethylpiperidinyl nitroxide radical) ester and 0.5 parts by weight of maleic anhydride, and 0.1 parts by weight of antioxidant 1010 and 0.1 parts by weight of Antioxidant 168, the stearic acid of 0.2 parts by weight, put into the high-speed mixer and carry out high-speed mixing 5min to uniform, then add in the mixer and melt and blend at 150 ℃ to be cross-linkable grafted polyethylene composition, mixing The mill speed is 50rpm; the gel content of the cross-linkable grafted polyethylene composition is determined to be 0% by weight;

[0069] (2) Put the cross-linkable grafted polyethylene composition into a banbury extruder at 200° C. for molding processing to obtain a cross-linked grafted polyethylene product. See Table 2 for the determination of the scorch time.

[0070] The cross-...

Embodiment 2

[0073] (1) 100 parts by weight of polyethylene (2650), 1.5 parts by weight of dibenzoyl peroxide, 0.6 parts by weight of triallyl cyanurate, 0.15 parts by weight of nitroxide free radical piperidinol and 2 parts by weight of Part of maleic anhydride, and the antioxidant 1010 of 0.1 weight part and the antioxidant 168 of 0.1 weight part, the stearic acid of 0.2 weight part, put into high-speed mixer and carry out high-speed mixing 5min to evenly, then add kneader Melting and blending at 140° C. to form a cross-linkable grafted polyethylene composition, the mixer speed is 50 rpm; the measured gel content of the cross-linked grafted polyethylene composition is 0% by weight;

[0074] (2) Put the cross-linkable grafted polyethylene composition into a banbury extruder at 210° C. for molding processing to obtain a cross-linked grafted polyethylene product. See Table 2 for the determination of the scorch time.

[0075] The cross-linked grafted polyethylene product is subjected to xyle...

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Abstract

The invention relates to the field of preparation of cross-linked grafted polyethylene by high melt index polyethylene, and discloses a crosslinkable grafted polyethylene composition, a cross-linked grafted polyethylene product, a preparation method thereof, and a product thereof. The composition comprises polyethylene, a cross-linking agent, a cross-linking assistant, a stabilizer, a processing modifier, an antioxidant and a lubricant; the melt index of the polyethylene at 190 DEG C at a load of 2.16 kg is more than 30 g / 10 min, the stabilizer is at least one kind of free radical stabilizers selected from the group consisting of phosphorous acid tri(2,2,6,6-tetramethyl-1-piperidinyloxy)ester, 2,2-di(4-tert-octylphenyl)-1-pierylhydrazine and nitrogen-oxygen free radical piperidycol; the processing modifier is at least one kind of compounds selected from the group consisting of methacrylic anhydride, glycidyl methacrylate, acrylic anhydride, maleic anhydride, maleic anhydride monoester, succinic anhydride, succinic anhydride monoester, fumaric acid anhydride and fumaric anhydride monoester. The high-melt-index polyethylene can be processed into the cross-linked grafted polyethylene product, and the focal burning time window is wide.

Description

technical field [0001] The present invention relates to the field of preparing crosslinked grafted polyethylene from high melt index polyethylene, in particular to a crosslinkable grafted polyethylene composition obtained by crosslinking the crosslinkable grafted polyethylene composition A cross-linked and grafted polyethylene product, a method for preparing the cross-linked and grafted polyethylene product and a product comprising at least one cross-linked and grafted polyethylene product as a component. Background technique [0002] Cross-linked polyethylene is an important polymer material. Provide high degree of cross-linking to meet the mechanical and material requirements of polymer requirements. [0003] US 8,283,420 and CN101652417B disclose a crosslinking method of a crosslinkable polyethylene composition, comprising providing a polyethylene component, a crosslinking agent and a co-crosslinking agent; melt blending the polyethylene component, a crosslinking agent a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F255/02C08F222/06C08F220/32C08K5/14C08K5/134C08K5/526C08K5/09C08L51/06C08J3/24
CPCC08F255/02C08J3/24C08J2351/06C08K5/09C08K5/1345C08K5/14C08K5/526C08L51/06C08L2312/00C08F220/325
Inventor 孙小杰陈学连梁文斌李亚飞赖世燿
Owner 神华(北京)新材料科技有限公司
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