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A special material for high wear-resistant polyolefin pipes and its preparation method

A special material for pipelines, polyolefin technology, applied in the field of special materials for high wear-resistant polyolefin pipelines and its preparation, can solve the problems of separation of wear-resistant core pipe and outer pipe, inability to bond steel pipes, poor compatibility, etc., and achieve wear-resistant Good performance, long service life and excellent compatibility

Active Publication Date: 2022-05-17
SHANDONG DONGHONG PIPE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent No. CN 103013022 B discloses a polysiloxane-grafted ultra-high molecular weight polyethylene modified material, which uses polysiloxane to graft UHMWPE, so that the fluidity and lubricity of the UHMWPE material are improved. It has greatly improved and overcomes the difficult problem of traditional UHMWPE material processing, but the polarity of this material is weak. When used in the wear-resistant layer of steel pipes, due to the strong non-polarity of the material itself, it cannot be effectively bonded with steel pipes to form a whole. The lining layer is easy to separate from the steel pipe during use
Patent No. CN 108329638 A discloses a silane-modified styrene-based thermoplastic elastomer wear-resistant material. The styrene-based thermoplastic elastomer is grafted and modified by silane to form a lightly cross-linked system, so that styrene The thermoplastic elastomer is rubber-like, and can effectively absorb the impact energy of solid particles through elastic deformation to improve the wear resistance of the material. The styrene-based thermoplastic elastic wear-resistant layer and the polyethylene and polypropylene outer tubes cannot be thermally combined into a whole, and the outer polyethylene, polypropylene tube and the wear-resistant core tube are not thermally fused into one, and the wear-resistant core tube will appear after long-term use Separation problem with outer tube

Method used

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  • A special material for high wear-resistant polyolefin pipes and its preparation method

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preparation example Construction

[0040] The above-mentioned components can meet the preparation requirements of this special material. At the same time, when coloring in the later stage, the required components also include: 0.3-3 parts of pigments; the pigments are white pigments, red pigments, blue pigments, and green pigments , one or a combination of yellow pigments, black pigments and pearlescent pigments.

[0041] A preparation method of a special material for high wear-resistant polyolefin pipes, comprising the following steps:

[0042] S1: Preparation of polyolefin thermoplastic elastomer: Mix the above components uniformly according to the above mass fractions, utilize dynamic thermal crosslinking reaction in a twin-screw extruder at 140-250 ° C, and obtain polyolefin thermoplastic elastomer after granulation ;

[0043] S2: Preparation of fluororubber graft-modified polyolefin thermoplastic elastomer: the fluororubber is plasticized and then granulated, and the above components are uniformly mixed a...

Embodiment 1

[0046] Fluorosilicone rubber granulation:

[0047] Methyl-3,3,3-trifluoropropylsiloxane with a vinyl content of 0.5% is plasticized with an open mill, and the plasticized fluorosilicone rubber is pelletized with a single-screw extruder. .

[0048] Preparation of fluororubber graft-modified polyolefin thermoplastic elastomer:

[0049] 5 parts of granulated methyl-3,3,3-trifluoropropyl siloxane, 20 parts of EPDM (J3080P, Jilin Petrochemical), 45 parts of POE (LC170, LG Chemical), 30 parts of polypropylene (F5006, Yanshan Petrochemical), 0.5 parts of dicumyl peroxide, and 0.3 parts of trimethylolpropane triacrylate were mixed uniformly, and extruded and pelletized with an extruder at 185 ° C to obtain a fluororubber graft-modified polyolefin thermoplastic elastomer .

[0050] Preparation of special materials for high wear-resistant polyolefin pipes:

[0051] 98.5 parts of fluororubber graft-modified polyolefin thermoplastic elastomer, 0.2 part of antioxidant 1010, and 0.3 par...

Embodiment 2

[0060] Fluorine rubber granulation:

[0061] The ternary copolymer fluororubber (FE2463, fluorine content of 67.5%) was masticated with an open mill, and the masticated fluorosilicone rubber was granulated with a single-screw extruder for use.

[0062] Polyolefin thermoplastic elastomer preparation:

[0063] 30 parts of EPDM (3092PM, Sinopec Mitsui Chemicals), 60 parts of POE (DF605, Mitsui Chemicals), 10 parts of polyethylene (7042, Jilin Petrochemical), 0.05 part of 2,5-dimethyl-2,5-bis-(tert- butyl peroxy) hexane and 0.01 part of dipentaerythritol hexaacrylate were mixed uniformly, and extruded and pelletized with an extruder at 195° C. to obtain a fluororubber graft-modified polyolefin thermoplastic elastomer.

[0064] Preparation of fluororubber graft-modified polyolefin thermoplastic elastomer:

[0065] 20 parts of granulated fluororubber, 30 parts of EPDM (3092PM, Sinopec Mitsui Chemicals), 10 parts of POE (DF740, Mitsui Chemicals), 40 parts of polyethylene (7042, Jil...

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Abstract

A special material for high wear-resistant polyolefin pipelines, which consists of the following components in parts by mass: 0-80 parts of polyolefin thermoplastic elastomer, 20-99.8 parts of fluororubber graft modified polyolefin thermoplastic elastomer, and antioxidant 0.2-1 part, the present invention combines the introduction of low surface energy fluorine-containing rubber to reduce the friction coefficient of the material, twin-screw dynamic crosslinking to form an elastomer network, and twin-screw reaction grafting three technical means to prepare the special material for polyolefin pipelines Good wear resistance and excellent processability; when the special material for high wear-resistant polyolefin pipes of the present invention is used in the lining wear-resistant layer of steel pipes, by introducing maleic anhydride-grafted polyethylene and maleic anhydride-grafted polypropylene, the wear-resistant The grinding layer can be bonded to the inner wall of the steel pipe during thermoforming instead of covering the inner wall of the steel pipe. The wear-resistant layer and the steel pipe are combined into one body, and the composite pipe has a longer service life; the special material for high wear-resistant polyolefin pipes of the present invention and The polyethylene and polypropylene outer tube materials have excellent compatibility, and the wear-resistant layer of the core tube and the outer tube are effectively fused into one when co-extruded.

Description

technical field [0001] The invention relates to the field of manufacturing special materials for polyolefin pipes, in particular to a special material for high wear-resistant polyolefin pipes and a preparation method thereof. Background technique [0002] There are more than 100,000 non-coal mines in my country (including nearly 10,000 metal mines), and the total amount of sediment dredging in my country's ports and rivers, lakes and reservoirs exceeds 20 billion m³. Therefore, pipelines are used for fine (tail) slurry transportation, dredging slurry transportation, etc. The amount of use in the field is quite large. [0003] At present, steel pipes and ultra-high molecular weight polyethylene (UHMWPE) pipes are mainly used in the market. Steel pipes are easily corroded and worn, with short service life, large specific gravity, and high installation and maintenance costs. Although UHMWPE pipes have excellent wear resistance and corrosion resistance It is suitable for steel p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08L23/12C08L23/16C08L83/08C08K5/14C08K5/134C08K3/04C08K13/02
CPCC08L23/0815C08L2205/035C08L2203/18C08L23/12C08L23/16C08L83/08C08K5/14C08K5/1345C08K3/04C08K13/02
Inventor 伍金奎孔智勇倪奉龙孔涛
Owner SHANDONG DONGHONG PIPE IND