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Waterborne acrylic baking paint and preparation method thereof

A water-based acrylic and hydroxy acrylic technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve the problems of poor environmental protection and poor dryness of solvent-based baking paint, and achieve poor environmental protection, low VOC content, and improved dryness. and the effect of hardness

Inactive Publication Date: 2019-01-11
FOSHAN GAOMING DISTRICT ZHUAHE NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a water-based acrylic baking varnish and its preparation method in view of the problems of poor environmental protection and poor dryness of the coating film in the existing solvent-based baking varnish

Method used

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  • Waterborne acrylic baking paint and preparation method thereof

Examples

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Effect test

example 1

[0024] Add 4.8g of 3,5-dimethylpyrazole and 11g of isophorone diisocyanate into 50g of acetone, stir and react at 300r / min in a constant temperature water bath at 60°C for 3h, then add 18g of epoxy resin E dropwise at 1g / min -51, after the dropwise addition, heat to 70°C, keep the temperature and react for 3 hours to obtain a pre-polymerization reaction liquid, add 5g triethylenetetramine, 80mL deionized water to the pre-polymerization reaction liquid, and heat at 70°C at 800r / min Stir the reaction for 1 h, then distill under reduced pressure to 20% of the volume of the stock solution to obtain an isocyanate curing agent. Take 100 g of hydroxyacrylic resin and put it into a reaction kettle, add 10 mL of deionized water, 2 g of dimethylethanolamine, 10 g of propylene glycol, and 0.1 g of Foaming agent, 0.3g wetting agent, stirred at 400r / min for 8min, then added 8g of ethylene glycol monobutyl ether aqueous solution with a mass fraction of 50%, 16g of water-based amino resin 325...

example 2

[0026] Add 5.4g of 3,5-dimethylpyrazole and 15g of isophorone diisocyanate into 60g of acetone, stir and react at 300r / min for 4 hours in a constant temperature water bath at 60°C, then add 18g of epoxy resin E dropwise at 1g / min -51. After the dropwise addition, heat to 75°C and keep the temperature for 3 hours to obtain a pre-polymerization reaction liquid. Add 5g triethylenetetramine and 90mL deionized water to the pre-polymerization reaction liquid, and heat at 75°C at 900r / min Stir the reaction for 1 hour, and then distill under reduced pressure to 30% of the volume of the stock solution to obtain an isocyanate curing agent. Take 100 g of hydroxyacrylic resin and put it into a reaction kettle, and add 30 mL of deionized water, 3 g of dimethylethanolamine, 15 g of propylene glycol, and 0.3 g of Foaming agent, 0.5g wetting agent, stirred at 400r / min for 8min, then added 8g of ethylene glycol monobutyl ether aqueous solution with a mass fraction of 50%, 18g of water-based ami...

example 3

[0028] Add 9.6g of 3,5-dimethylpyrazole and 22g of isophorone diisocyanate into 80g of acetone, stir and react at 400r / min for 5h in a constant temperature water bath at 65°C, then add 20g of epoxy resin E dropwise at 2g / min -51, after the dropwise addition, heat to 80°C, keep the temperature and react for 4 hours to obtain a pre-polymerization reaction liquid, add 6g triethylenetetramine, 100mL deionized water to the pre-polymerization reaction liquid, and heat at 80°C at 1000r / min Stir the reaction for 2 hours, and then distill under reduced pressure to 50% of the volume of the stock solution to obtain an isocyanate curing agent. Take 120g of hydroxyacrylic resin and put it into a reaction kettle, and add 50mL of deionized water, 5g of dimethylethanolamine, 25g of propylene glycol, and 0.5g of diethyl alcohol. Foaming agent, 0.6g wetting agent, stirred at 500r / min for 10min, then added 10g of ethylene glycol monobutyl ether aqueous solution with a mass fraction of 50%, 20g of...

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Abstract

The invention relates to a waterborne acrylic baking paint and a preparation method thereof and belongs to the technical field of coating. Due to the preparation of the waterborne acrylic baking painthaving the advantages of nontoxicity, environment friendliness, odorlessness, low VOC content and noninflammability and incombustibility, the defect of poor environment friendliness of an existing solvent-type baking paint is overcome; meanwhile, an isocyanate curing agent can be deblocked again under a certain temperature to generate an isocyanate group and a blocking agent, and the generated isocyanate group can react with an active hydrogen component in a formula to generate more stable carbamate by which a coating can have good flexibility, a relatively long carbon chain and a conjugateddouble-bond structure, the dryness and hardness of the paint film can be improved, and the coating dryness of the baking paint is improved; and hydroxyl as well as hydroxymethyl and alkoxymethyl are subjected to an ether exchange reaction to generate an ether bond, so that the thermal stability of the paint film is improved, the performance of the waterborne acrylic baking paint is as good as thatof a solvent-type acrylic-amino baking paint, and the waterborne acrylic baking paint is suitable for decorating and protecting metal products.

Description

technical field [0001] The invention relates to a water-based acrylic baking varnish and a preparation method thereof, belonging to the technical field of coating. Background technique [0002] Baking paint is a common industrial paint, which is widely used in machinery manufacturing, equipment, household appliances and hardware industries. The paint film has high gloss, high hardness and strong adhesion, and has excellent decorative properties for metal materials. protective. At present, in the domestic market, solvent-based baking varnish is still widely used. Baking varnish with melamine resin as curing agent is a coating widely used in mechanical equipment, automobiles, household appliances and other fields. It belongs to a large variety of coatings. Coatings play an important role. However, the performance of water-based coatings prepared from a single type of resin cannot compete with solvent-based coatings, which limits the popularization and application of water-ba...

Claims

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Application Information

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IPC IPC(8): C09D133/04C09D175/04C09D161/20C09D7/20
CPCC08L2201/08C08L2205/03C09D7/20C09D133/04C08L75/04C08L61/20
Inventor 裘友玖张桂芳朱华
Owner FOSHAN GAOMING DISTRICT ZHUAHE NEW MATERIAL TECH CO LTD