Preparation method of ultraviolet-curable water-borne fluorinated paint with low surface energy

A technology of fluorine-containing coatings and low surface energy, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor physical properties and environmental performance of coatings, achieve improved surface properties and overall performance, and high energy utilization , the effect of good biocompatibility

Inactive Publication Date: 2012-09-12
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a preparation method of low surface energy ultraviolet light-cured water-based fluorine-containing coatings, which overcomes the disadvantages of poor physical properties and environmental protection performance of traditional heat-cured coatings

Method used

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  • Preparation method of ultraviolet-curable water-borne fluorinated paint with low surface energy
  • Preparation method of ultraviolet-curable water-borne fluorinated paint with low surface energy
  • Preparation method of ultraviolet-curable water-borne fluorinated paint with low surface energy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] This example illustrates the acetone-di-n-butylamine method used in testing the conversion rate of isocyanate groups in the reaction.

[0020] The specific test method is as follows:

[0021] 1) Prepare 0.1mol / L HCl standard solution.

[0022] 2) Prepare 0.1mol / L di-n-butylamine-acetone standard solution.

[0023] 3) Titrate 10 ml of di-n-butylamine standard solution with HCl standard solution, use HCl standard solution volume V 1 ml.

[0024] 4) Add W to a 150ml Erlenmeyer flask 1 The sample of the g reactant (the weighing amount can be larger when the conversion rate is higher), add acetone to dissolve, and finally add a small amount of indicator bromophenol blue.

[0025] 5) Add 10 ml of di-n-butylamine standard solution, stir evenly, and keep warm at about 25°C for 15 minutes.

[0026] 6) Titrate with HCl standard solution, the color changes from blue to yellow, use HCl standard solution volume V 2 ml.

[0027] Calculation of the mass molar concentration of...

Embodiment 2

[0035] This example illustrates the preparation method of the low surface energy ultraviolet light curing water-based fluorine-containing pure acrylic polyurethane acrylate resin provided by the present invention.

[0036] (1) Add 80 parts by weight of xylene and 1.6 parts by weight of azobisisobutyronitrile into the three-necked bottle, adjust the temperature of the oil bath to 80°C, and drop 60 parts by weight into the three-necked bottle at a constant speed with a constant pressure dropping funnel The methyl methacrylate of 15 parts by weight, the acrylic acid of 15 parts by weight, the hydroxyethyl acrylate of 15 parts by weight and the hexafluorobutyl acrylate of 10 parts by weight, the rate of addition is controlled to drop within 2 hours; The heating bath temperature remains unchanged and continues to react for 4 hours; then add 0.4 parts by weight of azobisisobutyronitrile, and after continuing to react for 2 hours, stop the reaction;

[0037] (2) In another three-neck...

Embodiment 3

[0041] This example illustrates the preparation method of the low surface energy ultraviolet light curing water-based fluorine-containing pure acrylic polyurethane acrylate resin provided by the present invention.

[0042] (1) Add 80 parts by weight of butyl acetate and 1 part by weight of azobisisobutyronitrile into the three-necked bottle, adjust the temperature of the oil bath to 90°C, and drop 60 The methacrylate of parts by weight, the acrylic acid of 15 parts by weight, the hydroxyethyl acrylate of 15 parts by weight and the dodecafluoroheptyl methacrylate of 10 parts by weight, the rate of addition is controlled to drip within 2.5 hours; Finally, the temperature of the oil bath remains constant and continues to react for 4 hours; then add 0.3 parts by weight of azobisisoheptanonitrile, and after continuing to react for 2 hours, stop the reaction;

[0043] (2) In another three-necked bottle, add 30 parts by weight of isophorone diisocyanate and 0.1 part by weight of hydroq...

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Abstract

The invention discloses a preparation method of ultraviolet-curable water-borne fluorinated paint with low surface energy. The preparation method comprises the following steps: (1), adding a (methyl) acrylate monomer, a monohydroxy (methyl) acrylate monomer, a fluorinated acrylate monomer and part of an initiator into a three-opening bottle, reacting for 3-5 hours at a temperature of 70-90 DEG C, supplementing the initiator, and further reacting for 1.5-3 hours; (2), adding polyisocyanate into another three-opening bottle, and reacting for 4-5 hours at a temperature of 30-50 DEG C; (3), dripping a reaction product in the step (2) into a reaction product in the step (1), and reacting for 10-12 hours; and (4), testing a reaction product in the step (3), determining the acid value, adding a salt-forming agent and deionized water in a certain ratio, shearing and removing the solvent. The ultraviolet-curable water-borne fluorinated paint combines performances of polyurethane and acrylate paint, is free of solvent emission, meets environment-friendly requirements, and is simple and feasible to spray and short in film-forming and curing time.

Description

technical field [0001] The invention relates to a preparation method of low surface energy ultraviolet light curing water-based fluorine-containing coating. Background technique [0002] With the continuous improvement of people's awareness of environmental protection, low VOC (volatile organic compound) environmental protection materials have been developed rapidly. Epoxy acrylate, acrylated polyacrylate, unsaturated polyester resin and other systems have been developed successively. Compared with traditional natural drying or heat curing coatings, ultraviolet (UV) curing coatings have the characteristics of high energy utilization rate, suitable for heat sensitive substrates, no pollution, fast film forming speed, high coating film quality and suitable for continuous mass production , Known as an environmentally friendly coating. [0003] Acrylate (PA) is the main film-forming substance of high-grade latex paint due to its advantages of large relative molecular weight, f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/67C08G18/62C08F220/14C08F220/06C08F220/28C08F220/22C08F220/18C09D175/14
Inventor 梁红波熊磊黄圣梅李京
Owner NANCHANG HANGKONG UNIVERSITY
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