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Polyethylene lined steel pipe hot-melt adhesive for preventing pipe-orifice-split and preparation method and application thereof

A polyethylene and hot-melt adhesive technology, used in adhesives, graft polymer adhesives, hydrocarbon copolymer adhesives, etc., can solve the problems of nozzle separation and slow melting rate, and improve product quality , High adhesion, avoid the effect of nozzle separation

Inactive Publication Date: 2019-04-05
合诚技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem that the existing polyethylene hot-melt adhesive for steel-plastic composite pipes has a slow melting rate and causes the nozzle delamination, the primary purpose of the present invention is to provide a hot-melt adhesive for pipe nozzle delamination-preventing polyethylene-lined steel pipes, which is used to solve the problem. Delamination Problem of Hot Melt Adhesive for Steel-Plastic Composite Pipes

Method used

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  • Polyethylene lined steel pipe hot-melt adhesive for preventing pipe-orifice-split and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A hot-melt adhesive for anti-pipe delamination polyethylene-lined steel pipes is prepared by the following method:

[0034] (1) 3 parts by mass of maleic anhydride and 0.1 parts by mass of dicumyl peroxide (DCP) are dissolved in 3.1 parts by mass of acetone, and then mixed with 100 parts by mass of LDPE (at 190°C, under the condition of 2.16kg, MI=10g / 10min) together into a high-speed mixer and mixed evenly, and finally through a twin-screw extruder for reactive extrusion, the processing temperature is 180°C, and the screw speed is 400rpm to obtain grafted LDPE.

[0035] (2) 25 parts by mass of grafted LDPE, 40 parts by mass of LDPE (MI=7g / 10min under the condition of 190°C and 2.16kg), 15 parts by mass of POE (MI=5g / 10min under the condition of 190°C and 2.16kg) , 10 parts by mass of GPPS (MI=6g / 10min under the condition of 190°C and 2.16kg), 10 parts by mass of ethylene-acrylic acid copolymer (MI=10g / 10min under the condition of 190°C and 2.16kg), antioxidant B215 ( ...

Embodiment 2

[0037] A hot-melt adhesive for anti-pipe delamination polyethylene-lined steel pipes is prepared by the following method:

[0038](1) Dissolve 2 parts of methacrylic acid, 0.1 parts of benzoyl peroxide (BPO) and 0.2 parts of di-tert-butyl peroxide in 2.3 parts of acetone, and then mix with 100 parts of LLDPE (at 190 ° C, 2.16 kg MI=7g / 10min) were added into the high-speed mixer and mixed evenly, and finally extruded through the twin-screw extruder, the processing temperature was 170°C, and the rotating speed of the screw was 350rpm to obtain grafted LLDPE; the parts are mass number of copies.

[0039] (2) 20 parts by mass of grafted LLDPE, 30 parts by mass of LDPE (MI=7g / 10min under the condition of 190°C and 2.16kg), 20 parts by mass of POE (MI=5g / 10min under the condition of 190°C and 2.16kg) , 10 parts by mass of GPPS (MI=6g / 10min under the condition of 190°C and 2.16kg), 20 parts by mass of ethylene-acrylic acid copolymer (MI=10g / 10min under the condition of 190°C and 2.1...

Embodiment 3

[0041] A hot-melt adhesive for anti-pipe delamination polyethylene-lined steel pipes is prepared by the following method:

[0042] (1) Dissolve 3 parts of acrylic acid, 0.1 part of tert-butyl hydroperoxide, and 0.3 part of cumene hydroperoxide in 3.4 parts of acetone, and then mix with 100 parts of LLDPE (MI=7g / 10min) together into a high-speed mixer and mix evenly, and finally through a twin-screw extruder for reactive extrusion, the processing temperature is 170°C, and the screw speed is 400rpm to obtain grafted LLDPE; the parts are parts by mass;

[0043] (2) 25 parts by mass of grafted LLDPE, 30 parts by mass of LDPE (MI=7g / 10min under the condition of 190°C and 2.16kg), 15 parts by mass of POE (MI=5g / 10min under the condition of 190°C and 2.16kg) , 15 parts by mass of GPPS (MI=6g / 10min under the condition of 190°C and 2.16kg), 15 parts by mass of ethylene-acrylic acid copolymer (MI=10g / 10min under the condition of 190°C and 2.16kg), antioxidant 1010( BASF company) 0.1 m...

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Abstract

The invention belongs to the field of high-polymer adhesives, and discloses a polyethylene lined steel pipe hot-melt adhesive for preventing pipe-orifice split and a preparation method and applicationthereof. The polyethylene lined steel pipe hot-melt adhesive is prepared from 20-30 parts of grafted linear low-density polyethylene, 20-40 parts of low-density polyethylene, 10-20 parts of polyolefin elastomer, 10-20 parts of ethylene-acrylic acid copolymer, 10-20 parts of general polystyrene and 0.1-0.5 part of antioxidant by extruding and granulating through a reaction extruder. The polyethylene lined steel pipe hot-melt adhesive for preventing pipe-orifice split has good flowability, low softening temperature and high adhesive force with steel pipes, can effectively prevent the pipe orifice split to reduce steel pipe rework cost and bring appreciable economic benefit and social benefit to steel-plastic composite pipe enterprises.

Description

technical field [0001] The invention relates to the field of polymer adhesives, in particular to a hot-melt adhesive for pipe mouth delamination-preventing polyethylene-lined steel pipes and a preparation method and application thereof. Background technique [0002] Steel-plastic composite pipe combines the characteristics of steel pipe and plastic, and has the advantages of no joint, corrosion resistance, good rigidity, and high pressure bearing degree. It is currently widely used at home and abroad. The surface of the steel pipe and the polyethylene need to be bonded by a layer of polyethylene hot melt adhesive. The rigidity of the steel-plastic composite pipe is very good and cannot be wound and rolled, so the length of the steel-plastic composite pipe will not be too long, resulting in the steel pipe. There are many openings, and the mouth of the steel pipe is easy to contact with air, and the heat dissipation speed of the mouth of the pipe is faster than that in the mid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J151/06C09J123/06C09J123/08C09J125/06C09J11/06
CPCC08L2205/035C09J11/06C09J123/06C08L51/06C08L23/0815C08K5/1345C08K5/526
Inventor 黄应勤毛日辉池晓明游华燕诸泉蒋文真
Owner 合诚技术股份有限公司