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Resin emulsion for hydrophobic cathode electrophoretic coating as well as preparation method and application thereof

A cathodic electrophoretic coating and resin emulsion technology, applied in electrophoretic coatings, coatings, etc., can solve the problems of hydrophobicity, weather resistance and poor decoration, and achieve excellent decorative properties, good stability and excellent weather resistance of the coating film Effect

Inactive Publication Date: 2011-03-30
安吉万国涂料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems of poor hydrophobicity, weather resistance and decorative properties of existing coatings, the first object of the present invention is to provide a resin emulsion for hydrophobic cathodic electrophoretic coatings, which is formulated into a cathodic electrophoretic coating varnish After filming, the contact angle between the paint film and water is greater than 100°

Method used

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  • Resin emulsion for hydrophobic cathode electrophoretic coating as well as preparation method and application thereof
  • Resin emulsion for hydrophobic cathode electrophoretic coating as well as preparation method and application thereof
  • Resin emulsion for hydrophobic cathode electrophoretic coating as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] In a 250mL four-neck flask equipped with a stirrer, reflux condenser, and dropping funnel, add propylene glycol methyl ether and raise the temperature to 80°C in a water bath, dropwise add 10.00g of methyl methacrylate, 20.00g of butyl acrylate, 10.00g A mixed solution of hexafluorobutyl acrylate, 10.00 g of glycidyl methacrylate and 1.50 g of benzoyl peroxide was kept for 2 h after dripping for 3 h. Add diethanolamine and keep it warm for 2 hours, then add glacial acetic acid and stir for 30 minutes to prepare acrylic acid cationic resin.

Embodiment 2

[0035]In a 250mL three-neck flask equipped with a stirrer, a reflux condenser, and a constant pressure dropping funnel, add butyl acetate and raise the temperature to 80°C in a water bath, dropwise add 15.00g of methyl methacrylate, 30.00g of butyl acrylate, 20.00 A mixed solution of g long carbon chain (C12) fluoroacrylate, 20.00 g of glycidyl methacrylate and 3.50 g of benzoyl peroxide was kept for 2 h after dripping for 4 h. Add triethanolamine and keep it warm for 2 hours, then add glacial acetic acid and stir for 30 minutes to prepare long fluorocarbon chain acrylic cationic resin.

Embodiment 3

[0037] Add 25.00 g of isophorone diisocyanate into a 250 mL three-necked flask equipped with a stirrer, reflux condenser, and constant pressure dropping funnel, and slowly add 78.50 g of cyclohexanone solvent dropwise to the three-necked flask under stirring conditions , and add 1.50g diorganotin dilaurate catalyst, heat up to 40°C, start to add 36.50g diethylene glycol butyl ether (sealing agent) slowly and uniformly to the three-necked flask, and the reaction temperature is controlled at 60-80°C ℃, the dropping time is between 1.0-1.5 hours. After the dropwise addition, raise the temperature to 100-110°C, continue to keep warm for 3-4 hours, and when the free NCO content (di-n-butylamine method) is measured to be lower than 0.5%, cool down to 60°C, discharge the material, and put it into a clean and airtight container Save for later.

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Abstract

The invention relates to a cathode electrophoretic (CED) coating, in particular to a resin emulsion for a hydrophobic cathode electrophoretic coating and a preparation method thereof. The resin emulsion for the hydrophobic cathode electrophoretic coating is prepared by reacting cation fluorocarbon resin with a full sealing polyisocyanate crosslinking agent containing an active hydrogen compound as a sealant, then acidifying and adding deionized water to be dispersed; the cation fluorocarbon resin is prepared by polymerizing an acrylic acid monomer containing a fluorine monomer and a functional monomer through a solution and carrying out ring opening; and the full sealing polyisocyanate crosslinking agent accounts for 20-25% of the whole monomer mass and is prepared by reacting polyisocyanate with the sealant in the presence of a catalyst. After the resin emulsion is prepared into a cathode electrophoretic coating varnish and forms a film, a contact angle of a coating film and water is 100-120 degrees, therefore, the hydrophobicity, the weathering resistance and the decoration of the water-borne cathode electrophoretic coating are greatly improved.

Description

technical field [0001] The invention relates to a cathodic electrophoresis (CED) coating, in particular to a resin emulsion for a hydrophobic cathodic electrophoretic coating and a preparation method thereof. Background technique [0002] Due to the advantages of cathodic electrophoretic (CED) coatings with low content of volatile organic compounds (VOCs) and hazardous air pollutants (HAPs), high degree of coating automation, and high utilization rate, they are widely used as primers in the automotive industry. At present, CED coatings have developed from the primer to the combination of the bottom and the surface. They are increasingly used in hardware products such as lamps, bathroom accessories, and metal crafts. They are not limited to anti-corrosion purposes, but also have surface decoration. At present, the development of cathodic electrophoretic coating is very rapid, and the replacement of cathodic electrophoretic coating is very fast. At present, the global product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/08C08K5/205C08F220/18C08F220/14C08F220/22C08F220/32C08F8/32C09D133/08C09D5/44
Inventor 邵毅江
Owner 安吉万国涂料有限公司
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