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Adhesive resin for corrosion protection of steel pipe and preparation method of adhesive resin

A technology of bonding resin and bonding resin, which is applied in the direction of epoxy resin glue, adhesive, adhesive type, etc., can solve problems such as hidden dangers, toxicity, inability to bond with steel pipes, and anti-corrosion, and achieve excellent anti-corrosion performance and enhanced Effect of anti-corrosion performance and improvement of adhesive strength

Inactive Publication Date: 2017-06-27
SHANGHAI BANGZHONG NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low adhesion and toxicity of PE anti-corrosion steel pipes, it brings hidden dangers to the application.
U.S. Patent US3798118A proposes to add high-melting-point polypropylene with rosin glyceride and paraffin to prepare joint filling agent and adhesive, but it cannot be used for bonding and anticorrosion of steel pipes
Chinese patent 86107790A proposes to use modified atactic polypropylene resin and tackifying resin, etc., to be prepared by heating and mixing in a reactor with a constant-speed low-shear stirring device for steel pipe bonding, but from its process and According to the indicators, it is not suitable for the production conditions of extrusion coating process, nor is it suitable for long-term high-temperature outdoor use

Method used

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  • Adhesive resin for corrosion protection of steel pipe and preparation method of adhesive resin
  • Adhesive resin for corrosion protection of steel pipe and preparation method of adhesive resin
  • Adhesive resin for corrosion protection of steel pipe and preparation method of adhesive resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Adhesive resin comprises following raw material component and parts by weight in the present embodiment:

[0027]

[0028] The polyolefin is selected from high density polyethylene.

[0029] Described initiator is benzoyl peroxide tert-butyl ester.

[0030] The accelerator is phthalazinone biphenyl.

[0031] The curing agent is a low molecular weight polyamide, and the number average molecular weight of the polyamide is 1000-1500.

[0032] After the above raw material components are mixed evenly, they are fed into the co-rotating parallel twin-screw extruder through the barrel. And 210~220℃, 220℃~230℃, the speed of the twin-screw extruder is 220r / min. Vacuum exhaust at the end of the extrusion to remove unreacted volatile substances, water-cool, air-dry, and granulate to obtain the finished product as shown.

Embodiment 2

[0034] Adhesive resin comprises following raw material component and parts by weight in the present embodiment:

[0035]

[0036] The polyolefin is selected from high density polyethylene.

[0037] Described initiator is benzoyl peroxide tert-butyl ester.

[0038] The accelerator is phthalazinone biphenyl.

[0039] The curing agent is a low molecular weight polyamide, and the number average molecular weight of the polyamide is 1000-1500.

[0040] After mixing the raw material components evenly, feed them into the co-rotating parallel twin-screw extruder through the barrel, the screw length-to-diameter ratio is 50, and the temperature of each section of the extruder is 170-180°C, 190-200°C, 200-210°C And 210~220℃, 220℃~230℃, the speed of the twin-screw extruder is 200r / min. Vacuum exhaust at the end of the extrusion to remove unreacted volatile substances, water-cool, air-dry, and granulate to obtain the finished product as shown.

Embodiment 3

[0042] Adhesive resin comprises following raw material component and parts by weight in the present embodiment:

[0043]

[0044] The polyolefin is selected from high density polyethylene.

[0045] Described initiator is benzoyl peroxide tert-butyl ester.

[0046] The accelerator is phthalazinone biphenyl.

[0047] The curing agent is a low molecular weight polyamide, and the number average molecular weight of the polyamide is 1000-1500.

[0048] After mixing the raw material components evenly, feed them into the co-rotating parallel twin-screw extruder through the barrel, the screw length-to-diameter ratio is 50, and the temperature of each section of the extruder is 170-180°C, 190-200°C, 200-210°C And 210~220℃, 220℃~230℃, the speed of the twin-screw extruder is 200r / min. Vacuum exhaust at the end of the extrusion to remove unreacted volatile substances, water-cool, air-dry, and granulate to obtain the finished product as shown.

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Abstract

The invention provides an adhesive resin for corrosion protection of a steel pipe. The adhesive resin mainly contains the following raw materials in parts by weight: 38 to 80 parts of polyolefin, 2 to 10 parts of maleic anhydride, 0.01 to 0.5 part of initiator, 33 to 39 parts of epoxy resin, 10 to 20 parts of tackifier, 0.1 to 0.9 part of plasticizer, 0.1 to 1.2 parts of antioxidant, 3 to 7 parts of accelerant, and 1 to 5 parts of curing agent, wherein polyolefin is one or more components selected from high-density polyethylene, linear low-density polyethylene, low-density polyethylene and polypropylene. The adhesive resin for the corrosion resistance of the steel pipe, provided by the invention, has the characteristics of high peel strength and excellent corrosion resistance.

Description

technical field [0001] The invention relates to the field of adhesives, and specifically discloses an adhesive resin used for anticorrosion of steel pipes and a preparation method thereof. Background technique [0002] Low-pressure RTP is widely used in construction and market fields in China, but currently only aluminum-plastic composite pipes are widely used in this field abroad. In order to reduce plastic consumption and reduce costs, my country has developed and produced a variety of low-pressure RTP. Low-pressure RTP is mostly used in construction and municipal fields to transport water and natural gas. Such as steel wire skeleton plastic composite pipe, steel skeleton polyethylene composite pipe, aluminum-plastic composite pipe MP, steel-plastic composite pipe, large-diameter steel wire reinforced polyethylene pipe. These pipes all have a multi-layer structure, and the layers need to be bonded between the layers. The quality of the pasting resin directly affects the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/06C09J163/00C09J11/06C09J11/08
Inventor 储江顺毕宏海彭艳华毕宏清程启山汪丽陈旭睿毕宏俊欧阳贵薛明跃
Owner SHANGHAI BANGZHONG NEW MATERIAL