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Polymer adhesive resin for corrosion-prevention of steel pipe and preparation process thereof

A technology for bonding resins and polymers, applied in non-detachable pipe connections, pipes/pipe joints/fittings, mechanical equipment, etc., can solve the problem of PE anti-corrosion steel pipes with low adhesion, toxicity, inability to bond with steel pipes and anti-corrosion And other issues

Inactive Publication Date: 2006-04-05
赵璐
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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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] After dissolving 7% maleic anhydride in acetone, add 50Kg HDPE to the high-speed disperser and mix evenly in three times. After airing, add 0.5% initiator DCP, 20% EVA, 10% PB, 0.7% After the oxidized polyethylene, 1% antioxidant, 0.3% stearylamide and appropriate amount of pigments and fillers are mixed evenly, they are fed into the parallel exhaust twin-screw extruder through the barrel, and the length-to-diameter ratio of the screw is 40. The temperature of each section of the extruder is 210°C, 220°C, 230°C, 235°C, the screw speed is 200r / min, the end of the extruder is vacuum exhausted, and the unreacted volatile substances are removed, water-cooled, air-dried, granulated, and packaged. That is the finished product. This product is used for the bonding of buried steel pipe anti-corrosion (three-layer PE), and the 180 peel strength with the steel sheet can reach 18N / mm after testing.

Embodiment 2

[0031] After dissolving 7% maleic anhydride in acetone, add 50Kg PP into the high-speed disperser and mix evenly in three times. After airing, add 0.5% initiator DCP, 20% EVA, 10% PB, 0.7% After the oxidized polyethylene, 1% antioxidant, 0.3% caprolactam and appropriate amount of pigments and fillers are mixed evenly, they are fed into the parallel exhaust twin-screw extruder through the barrel. The length-to-diameter ratio of the screw is 40. The section temperature is 180°C, 220°C, 220°C, 230°C, the screw speed is 200r / min, the end of the extruder is vacuum-exhausted to remove unreacted volatile substances, water-cooled, air-dried, granulated, and packaged to obtain finished product. This product is used for the bonding of buried steel pipe anti-corrosion (three-layer PP).

[0032] The polymer bonding resin used for steel pipe anticorrosion produced by the method of the invention has high bonding strength, good application process and excellent anticorrosion performance, an...

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Abstract

The invention relates to adhesive resin with antiseptic function for steel pipe, which is prepared by HDPE, LLDPE, LDPE, PP, maleic anhydride, initiator, EVA, tackifier, antioxidant, color filler, and structural modifying agent with double-screws extruder. The product has high joint strength, and friend environment.

Description

technical field [0001] The invention relates to a chemical raw material, in particular to a bonding resin for bonding steel pipes and having an anti-corrosion function. It belongs to the field of adhesives. technical background [0002] In the past, anti-corrosion pipelines mostly used asphalt, coal tar enamel paint and fusion-bonded epoxy resin to clean the surface of steel pipes for anti-corrosion, which were limited due to high pollution, low temperature resistance, and thin and brittle paint films. At present, most of them use two-layer PE or three-layer PE anti-corrosion steel pipe structure to make up for the shortage. However, due to the low adhesion and toxicity of PE anti-corrosion steel pipes, it brings hidden dangers to the application. U.S. Patent No. 3,798,118A proposes adding high-melting-point polypropylene to prepare seam fillers and adhesives with rosin glyceride and paraffin, but it cannot be used for bonding and anticorrosion of steel pipes. Chinese pat...

Claims

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Application Information

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IPC IPC(8): C09J123/06C09J123/12F16L13/10
Inventor 赵璐
Owner 赵璐
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