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Curing agent composition and coating composition comprising the same

A curing agent and composition technology, applied in epoxy resin coatings, coatings, etc., can solve problems such as damage to the appearance of the coating film, bonding defects, etc., and achieve the effect of excellent water resistance and fast curing speed.

Active Publication Date: 2022-04-01
KCC CORP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The whitening phenomenon of the coating film can cause damage to the appearance of the coating film and adhesion defects

Method used

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  • Curing agent composition and coating composition comprising the same
  • Curing agent composition and coating composition comprising the same
  • Curing agent composition and coating composition comprising the same

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0073] After throwing 19 g of butanol into a synthesis four-necked flask equipped with a thermometer and a stirring device, the temperature was raised to 125° C. as a reflux temperature under a nitrogen atmosphere. Then 27.7 g of styrene, 18 g of butyl acrylate, 3.6 g of methacrylic acid, 6.7 g of dimethylaminoethyl methacrylate and 14 g of 2-ethylhexyl methacrylate were added and mixed, 1 g of benzoyl peroxide and 10 g of butanol were uniformly separated and dropped over 4 hours. After the dropwise addition was completed, polymerization was carried out at reflux temperature for 2 hours, thereby obtaining a solid content of 70% based on weight, a viscosity of Z3-Z6, an acid value of 34 mgKOH / g, and an amine value of 34 mgKOH / g 1. The first acrylic resin having a glass transition temperature of 15°C.

Synthetic example 2

[0075] 1) Synthesis of intermediate reactants

[0076] After injecting 21 g of maleic acid, 49 g of hydroxystearic acid, and 30 g of butyl acetate into a synthesis four-necked flask equipped with a thermometer and a stirring device, reaction was performed at a temperature of 80° C. for 6 hours. Thereafter, cooling was carried out after the reaction until the acid value reached 271 mgKOH / g, thereby obtaining an intermediate reactant (resin) having a solid content of 70% by weight, a viscosity of V-Z, and an acid value of 271.2 mgKOH / g.

[0077] 2) Synthesis of the second acrylic resin

[0078] After throwing 16 g of butanol into a synthesis four-necked flask equipped with a thermometer and a stirring device, the temperature was raised to 125° C. as a reflux temperature under a nitrogen atmosphere. Then add and mix 26g of styrene, 14g of butyl acrylate, 12.5g of intermediate reactant (Long chain acid), 14g of 2-ethylhexyl methacrylate and 7g of dimethylammonium methacrylate Et...

Synthetic example 3

[0080] 1) Synthesis of intermediate reactants

[0081] After injecting 21 g of maleic acid, 25 g of hydroxymethylbenzoic acid, and 19.7 g of butyl acetate into a synthesis four-necked flask equipped with a thermometer and a stirring device, the reaction was performed at a temperature of 80° C. for 6 hours. Thereafter, cooling was carried out after the reaction until the acid value reached 271 mgKOH / g, thereby obtaining an intermediate reactant (resin) having a solid content of 70% by weight, a viscosity of V-Z, and an acid value of 271.2 mgKOH / g.

[0082] 2) Synthesis of the second acrylic resin

[0083] After throwing 16 g of butanol into a synthesis four-necked flask equipped with a thermometer and a stirring device, the temperature was raised to 125° C. as a reflux temperature under a nitrogen atmosphere. Then add and mix 26 g of styrene, 14 g of butyl acrylate, 12.5 g of intermediate reactants, 14 g of 2-ethylhexyl methacrylate, and 7 g of dimethylaminoethyl methacrylate ...

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Abstract

The present invention relates to a curing agent composition and a coating composition capable of forming a coating film having a high curing rate and excellent physical properties even at a relatively low temperature by containing the curing agent composition.

Description

technical field [0001] The present invention relates to a curing agent composition and a coating composition comprising the curing agent composition. Background technique [0002] In general, paints used for painting are required to have physical properties such as chemical resistance, corrosion resistance, and water resistance because they need to protect the object to be coated from the impact of the environment. [0003] The coating used for the coating has a coating composition comprising an amine curing agent and an epoxy resin, but due to the incompatibility between the amine curing agent and the epoxy resin, it will cause phase separation, so that the amine is released to the surface of the coating film. migration, and thus, when painting is performed using the coating composition, there is a problem of causing a whitening phenomenon of the coating film. [0004] That is, the amine moves to the surface of the coating film, and the moved amine reacts with carbon dioxi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D125/14C09D163/00
CPCC09D125/14C08L2205/035C08L2205/025C08L25/14C08L63/00C09D133/08C08L33/08C08L33/066C08L79/04C08L77/00
Inventor 李桢仁郑多恩朴钟允朴熙远南晛金志承李禹卓
Owner KCC CORP CO LTD
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