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A kind of polyamide-amine type waterborne lignin-based epoxy anticorrosion coating and preparation method thereof

An epoxy anti-corrosion coating, lignin-based technology, applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problem of poor resistance to strong acid or strong alkali, poor high temperature resistance, and low crosslinking density of the coating film And other problems, to achieve the effect of improving crosslinking density, good physical machinery, good heat resistance

Active Publication Date: 2022-05-10
CNOOC CHANGZHOU PAINT & COATINGS IND RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The water-based epoxy anti-corrosion coating synthesized by the above method failed to modify the molecular structure of the matrix resin more comprehensively, and the cross-linking structure of the coating did not change significantly. At the same time, the prepared coating film had low cross-linking density and high temperature resistance. Various problems such as poor performance, poor resistance to strong acid or strong alkali

Method used

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  • A kind of polyamide-amine type waterborne lignin-based epoxy anticorrosion coating and preparation method thereof
  • A kind of polyamide-amine type waterborne lignin-based epoxy anticorrosion coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]1) Add 277.2g of pentamethylene diisocyanate, 18g of dimethylolpropionic acid, 68g of trimethylolpropane, and 47g of butanone into a four-necked flask equipped with a spherical condenser, nitrogen inlet tube, stirrer and thermometer and 0.19g of dibutyltin dilaurate, reacted at 70°C for 3h, then added 140.76g of imidazole to continue the reaction for 3h, added 13.56g of triethylamine at 50°C, reacted for 1h, added 117.45g of deionized water under high-speed stirring, and distilled under reduced pressure Butanone is removed to obtain a water-based blocked isocyanate crosslinking agent.

[0032] 2) Add 100g of lignin, 1000g of epoxy resin E-20, 300g of ethylene glycol methyl ether and 50g of 1.0-generation hydroxyl-terminated polyamide-amine resin into a four-necked flask equipped with a spherical condenser, stirrer and thermometer, React at 90°C for 4h, add 150g of emulsifier CTW-6060, stir at 100°C for 1h, then add 1000g of deionized water under the condition of stirring...

Embodiment 2

[0036] 1) Add 277.2g of pentamethylene diisocyanate, 18g of dimethylolpropionic acid, 68g of trimethylolpropane, and 47g of butanone into a four-necked flask equipped with a spherical condenser, nitrogen inlet tube, stirrer and thermometer And 0.19g of dibutyltin dilaurate, react at 70°C for 4h, then add 149.76g of 2-methylimidazole to continue the reaction for 3h, add 13.56g of triethylamine at 50°C, react for 1h, add 117.45g of deionized water under high-speed stirring , butanone was distilled off under reduced pressure to obtain a water-based blocked isocyanate crosslinking agent.

[0037] 2) Add 150g of lignin, 1000g of epoxy resin E-20, 300g of ethylene glycol methyl ether and 50g of 1.0-generation hydroxyl-terminated polyamide-amine resin into a four-necked flask equipped with a spherical condenser, stirrer and thermometer, React at 120°C for 1 hour, add 160g of emulsifier CTW-6060, stir at 100°C for 1 hour, then add 1000 g of deionized water under the condition of stirr...

Embodiment 3

[0041] 1) Add 297.2g of pentamethylene diisocyanate, 18g of dimethylolpropionic acid, 68g of trimethylolpropane, and 67g of butanone into a four-neck flask equipped with a spherical condenser, nitrogen inlet tube, stirrer and thermometer and 0.19g dibutyltin dilaurate, reacted at 70°C for 3h, then added 140.76g 3,5-dimethylpyrazole to continue the reaction for 3h, added 13.56g triethylamine at 50°C, reacted for 1h, added 117.45g under high-speed stirring g deionized water, butanone was distilled off under reduced pressure to obtain a water-based blocked isocyanate crosslinking agent.

[0042] 2) Add 130g of lignin, 1000g of epoxy resin E-12, 300g of ethylene glycol methyl ether and 60g of 1.0-generation hydroxyl-terminated polyamide-amine resin into a four-necked flask equipped with a spherical condenser, stirrer and thermometer, React at 100°C for 3h, add 150g of emulsifier CTW-6060, stir at 100°C for 1h, then add 1000g of deionized water under stirring in a high-speed disper...

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Abstract

The invention discloses a polyamide-amine water-based lignin-based epoxy anticorrosion coating and a preparation method thereof. The polyamide-amine type water-based lignin-based epoxy anti-corrosion coating is composed of the following raw materials in parts by mass: 80-120 parts of polyamide-amine-type water-based lignin-based epoxy emulsion, 10 parts of water-based blocked isocyanate crosslinking agent ~20 parts, 0.08~0.2 parts of dibutyltin dilaurate, 60~100 parts of water-based pigment paste, 0.2~0.6 parts of defoamer, 0.1~0.6 parts of leveling agent, 0.2~0.6 parts of anti-flash rust agent and deionized 0~10 parts of water. The polyamide-amine type water-based lignin-based epoxy anti-corrosion coating prepared by the present invention has carried out relatively comprehensive molecular structure modification on the matrix resin and curing agent, and the cross-linking structure of the coating has changed significantly. The cross-linking density is greatly enhanced, it can withstand high temperature of 250 ℃, and it has excellent resistance to strong acid or strong alkali.

Description

technical field [0001] The invention belongs to the field of anticorrosion coatings, in particular to a polyamide-amine water-based lignin-based epoxy anticorrosion coating and a preparation method thereof. Background technique [0002] Most of the heavy-duty anti-corrosion coatings currently on the market are solvent-based coatings, which contain volatile organic compounds (VOCs) that are highly toxic and flammable, and are likely to pose a threat to the atmosphere and human health. According to statistics, at present, about 1 million tons of organic solvents are discharged into the atmosphere by my country's paint coating industry every year, which not only seriously pollutes the environment, but also wastes a lot of resources. Water-based coatings use water instead of organic solvents in solvent-based coatings. The biggest feature is that the VOC content is greatly reduced, which achieves the purpose of environmental protection. It is one of the main development trends of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/02C09D5/08C09D7/65
CPCC09D163/00C09D5/08C09D7/65C08L75/04
Inventor 史立平王亚鑫谭伟民狄志刚雒新亮饶兴兴刘仲阳何毅郁飞
Owner CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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