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Dry film hot melt adhesive for pipe joint anticorrosion

A hot-melt adhesive and dry film technology, applied in the direction of adhesives, adhesive types, mineral oil hydrocarbon copolymer adhesives, etc., can solve the problems that cannot meet the needs of dry film construction and anticorrosion, and achieve good bonding performance, Excellent product performance, improved fluidity and high temperature resistance

Active Publication Date: 2016-03-02
江苏达胜热缩防护用品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dry film construction method of 3PE heat shrinkable tape (set) puts forward new requirements for the research and development of hot melt adhesives. The traditional wet film hot melt adhesives cannot meet the needs of dry film construction anticorrosion.

Method used

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  • Dry film hot melt adhesive for pipe joint anticorrosion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) First dry the raw materials of each component in the formula, and then weigh the mixture of 74% ethylene-acrylate-maleic anhydride terpolymer (EMH) and ethylene-vinyl acetate copolymer (EVA) (EMH and The mass ratio of EVA is 9:1, the VA content of EVA is 30%, the melt index (MI) of EVA is 150g / 10min), weighs 23% rosin resin and C 5 A mixture of petroleum resins is used as a composite tackifying resin (rosin resin and C 5 The mass ratio of petroleum resin is 1:3), 0.8% diphenylmethane diisocyanate, 0.5% antioxidant 1010, 1.3% light calcium carbonate and carbon black;

[0023] (2) Put the raw materials prepared in step (1) into the internal mixer, knead at a temperature of 180-190°C for 2 hours, then stir for 10 minutes and then vacuumize for 30 minutes;

[0024] (3) Apply the mixture prepared in step (2) to a pressure roller to obtain a hot melt adhesive.

Embodiment 2

[0026] (1) First dry the raw materials of each component in the formula, and then weigh the mixture of 70% ethylene-acrylate-maleic anhydride terpolymer (EMH) and ethylene-vinyl acetate copolymer (EVA) (EMH and The mass ratio of EVA is 9:1, the VA content of EVA is 30%, the melt index (MI) of EVA is 150g / 10min), weighs 26% rosin resin and C 5 A mixture of petroleum resins is used as a composite tackifying resin (rosin resin and C 5 The mass ratio of petroleum resin is 1:3), 1% diphenylmethane diisocyanate, 0.8% antioxidant 1010, 2.2% light calcium carbonate and carbon black;

[0027] (2) Put the raw materials prepared in step (1) into the internal mixer, knead at a temperature of 180-190°C for 2 hours, then stir for 10 minutes and then vacuumize for 30 minutes;

[0028] (3) Apply the mixture prepared in step (2) to a pressure roller to obtain a hot melt adhesive.

Embodiment 3

[0030] (1) First dry the raw materials of each component in the formula, and then weigh the mixture of 78% ethylene-acrylate-maleic anhydride terpolymer (EMH) and ethylene-vinyl acetate copolymer (EVA), (EMH The mass ratio with EVA is 9:1, the VA content of EVA is 30%, the melt index (MI) of EVA is 150g / 10min), weigh 18% rosin resin and C 5 A mixture of petroleum resins is used as a composite tackifying resin (rosin resin and C 5 The mass ratio of petroleum resin is 1:3), 0.6% diphenylmethane diisocyanate, 0.8% antioxidant 1010, 2.6% light calcium carbonate and carbon black;

[0031] (2) Put the raw materials prepared in step (1) into the internal mixer, knead at a temperature of 180-190°C for 2 hours, then stir for 10 minutes and then vacuumize for 30 minutes;

[0032] (3) Apply the mixture prepared in step (2) to a pressure roller to obtain a hot melt adhesive.

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Abstract

The invention provides a pipeline joint anticorrosion dry film hot melt adhesive. The formula of the hot melt adhesive comprises the following components: by weight, 70-78% of matrix resin, 16-32% of composite tackifying resin, 0.6-1% of a flexibilizer, 0.3-0.8% of an anti-oxidant and 1-3% of a filler, wherein the matrix resin is a mixture of an ethene-acrylic acid ester-maleic anhydride terpolymer (EMH) and an ethene-vinyl acetate copolymer (EVA); the mass ratio of EMH to EVA is 9:1; VA content of the EVA is 28-33%; and melt index (MI) of the EVA is 150-300g / 10min. The invention provides a hot melt adhesive containing matrix resin which is a mixture of EMH and EVA and a preparation method thereof. According to the invention, high temperature resistance of the anticorrosion hot melt adhesive is raised; the applicability problem of the hot melt adhesive under the condition of dry-film construction; and it can be guaranteed that the hot melt adhesive has good bond property under the condition of high temperature.

Description

technical field [0001] The invention relates to pipeline anticorrosion, in particular to a dry film hot melt adhesive for pipeline joint anticorrosion. Background technique [0002] At present, the method of coating the outer anti-corrosion layer is often used to ensure the anti-corrosion effect of the pipe joint. The outer anti-corrosion layer is composed of a cross-linked PE sheet coated with a certain thickness of hot melt adhesive. When used, the anti-corrosion layer is coated on the pipe joint. Then heat it to melt the hot-melt adhesive, and the oriented PE shrinks, relying on its PE shrinkage force to make the hot-melt adhesive stick to the joint of the pipe to complete the anti-corrosion treatment. Therefore, the anti-corrosion hot melt adhesive for pipeline jointing needs to have the following properties: (1) It has good adhesion to non-polar substrates (PE) and polar substrates (steel pipes) (higher peeling, shearing Destruction strength), to ensure that the anti-c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J123/08C09J193/04C09J157/02C09J11/04C09J11/06F16L58/10
Inventor 杨军伟庄向阳梅锦伟韦良
Owner 江苏达胜热缩防护用品有限公司
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