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Fluorine-modified epoxy phosphate aqueous dispersion

A technology of epoxy phosphate ester and fluorine modification, which is applied in the direction of epoxy resin coatings, coatings, anti-corrosion coatings, etc., can solve the problems that the heat resistance and insulation performance of polymer corrosion-resistant coatings cannot meet the needs of use, and achieve improvement Mechanical properties and heat and corrosion resistance, good manufacturability, and good thermal stability

Active Publication Date: 2018-10-09
BEIJING JINHWEILI APPLIED CHEM PROD +1
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  • Description
  • Claims
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Problems solved by technology

[0003] In view of this, the present invention proposes a formulation of a fluorine-modified epoxy phosphate aqueous dispersion and a water-based baking varnish for magnet materials obtained according to the formulation, aiming at solving the problem of polymer corrosion-resistant coatings used in existing rare earth permanent magnet materials. Heat resistance and insulation properties cannot meet the growing demand for use

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  • Fluorine-modified epoxy phosphate aqueous dispersion

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preparation example Construction

[0028] The second aspect of the present invention provides a kind of preparation method of above-mentioned fluorine-modified epoxy phosphate aqueous dispersion, and this method comprises the following steps:

[0029] (1) Oxazolidinization: Put the epoxy resin, small molecule alcohols and the first catalyst in the formula into the reaction vessel, mix, stir and heat to 30-70°C, then add the isocyanate in the formula at 35- Keep warm at 75°C for 0.5-3 hours, then slowly raise the temperature to 100-130°C, add part of the second catalyst and react at 110-135°C until the epoxy equivalent of the epoxy resin is 252-340. Preferably, the temperature for the first heating is 40-45°C, the temperature for heat preservation is 40-65°C, the time for heat preservation is 1-2 hours, and the temperature for the second heating is 115-125°C. After adding the second catalyst The reaction temperature is 115-130° C., and the epoxy equivalent of the epoxy resin is 310-330 at 115-130° C.

[0030] D...

Embodiment 1

[0044] (1) Take 301g of epoxy resin E51, 9g of methanol, and 0.2g of dibutyltin dilaurate into a reaction vessel, mix, stir and heat to 30°C, then add 130g of modified diphenylmethane diisocyanate of Desmodur E22 Keep warm at 35°C for 0.5-1 hour, slowly heat up to 100°C, add 0.35g of triphenylphosphine and react at 110°C until the epoxy equivalent of the epoxy resin is 320-330;

[0045] (2) Add 30g of ethylene glycol monobutyl ether and cool down to 75°C, add 95g of bisphenol A, 35g of bisphenol AF and 0.35g of triphenylphosphine, raise the temperature to 140°C under stirring, and react to the temperature of the epoxy resin The epoxy equivalent is 1900-2000;

[0046] (3) Add 190g of ethylene glycol monobutyl ether and cool down to 50°C, then add 35g of phosphoric acid, heat up to 90°C, keep warm for 2-3 hours, then cool down to 55°C, add 63g of N,N-dimethylethanolamine (DMEA) And stir evenly, slowly add 1090g of deionized water at 50-60°C dropwise, and emulsify to obtain a fl...

Embodiment 2

[0050] (1) Take 364g of epoxy resin E51, 11g of ethanol, and 0.21g of monobutyltin oxide in a reaction vessel, mix, stir and heat to 30°C, then add 158g of modified diphenylmethane diisocyanate of Desmodur E22 Keep warm at 36°C for 0.5-1 hour, slowly heat up to 110°C, add 0.42g of N,N-dimethylbenzylamine and react at 115°C until the epoxy equivalent of the epoxy resin is 318-328;

[0051] (2) Add 56g of ethylene glycol monobutyl ether and cool down to 80°C, add 44g of bisphenol A, 133g of bisphenol AF and 0.42g of N,N-dimethylbenzylamine, raise the temperature to 135°C under stirring, and react The epoxy equivalent to epoxy resin is 1550-1650;

[0052] (3) Add 185g of ethylene glycol monobutyl ether and cool down to 55°C, then add 51g of phosphoric acid, heat up to 102°C, keep warm for 2-3 hours, then cool down to 60°C, add 78g of N,N-dimethylethanolamine (DMEA) And stir evenly, slowly add 1200g of deionized water at 60-70°C dropwise, and emulsify to obtain a fluorine-modifie...

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Abstract

The invention provides a fluorine-modified epoxy phosphate water dispersion. A synthetic formula of the fluorine-modified epoxy phosphate water dispersion comprises the following components in parts by weight: 200-425 parts of epoxy resin, 8-25 parts of micromolecule alcohol, 0.1-0.5 part of first catalyst, 35-160 parts of isocyanate, 0-120 parts of bisphenol A, 0-35 parts of hydrogenated bisphenol A, 35-140 parts of bisphenol AF, 0.5-1 part of second catalyst, 25-60 parts of phosphoric acid, 110-265 parts of alcohol ether solvent, 40-100 parts of amine neutralizer and 600-1400 parts of deionized water. According to the fluorine-modified epoxy phosphate water dispersion, the heat resistance, the corrosion resistance and the insulating property of water-based baking varnish prepared from the epoxy phosphate aqueous dispersion can reach the level of solvent type epoxy baking varnish of the same type, meanwhile, the emission of VOC can be reduced, and the environmental protection performance can be improved.

Description

technical field [0001] The invention relates to the technical field of water-based coatings, in particular to a fluorine-modified epoxy phosphate aqueous dispersion. Background technique [0002] At present, the polymer corrosion-resistant coatings used in rare earth permanent magnet materials cannot meet the growing demand for heat resistance and insulation. Due to factors such as non-toxic organic solvents and the risk of explosion, it is necessary to develop a heat-resistant and corrosion-resistant water-based baking varnish that uses water as a diluent with good insulation effect and is suitable for coating rare earth permanent magnet materials. Contents of the invention [0003] In view of this, the present invention proposes a formulation of a fluorine-modified epoxy phosphate aqueous dispersion and a water-based baking varnish for magnet materials obtained according to the formulation, aiming to solve the problem of polymer corrosion-resistant coatings used in exist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/08C09D5/25C09D5/18C08G59/62C08G59/14
CPCC08G59/1422C08G59/1438C08G59/1477C08G59/1494C08G59/621C09D5/08C09D5/18C09D163/00
Inventor 秦文梁奕方秀莲饶晓雷
Owner BEIJING JINHWEILI APPLIED CHEM PROD
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