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Resin composition for cation electrodeposition paint with excellent inner permeability, containing aromatic sulfonic acid and urethane functional rheology modifier

A cationic electrodeposition and resin composition technology, which is applied in polyurea/polyurethane coatings, electrophoretic coatings, epoxy resin coatings, etc., can solve the problems of reduced water resistance and rust resistance, deterioration of appearance, and insufficient flexibility. Achieve excellent flexibility, reduce production costs, and improve edge rust resistance

Inactive Publication Date: 2013-09-11
KCC CORP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polyamide resin promotes the degree of crosslinking in coating formation and the appearance deteriorates and the flexibility is insufficient
In order to solve this situation, a plasticizer is commonly used, but due to its use, a decrease in water resistance and rust resistance is caused

Method used

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  • Resin composition for cation electrodeposition paint with excellent inner permeability, containing aromatic sulfonic acid and urethane functional rheology modifier
  • Resin composition for cation electrodeposition paint with excellent inner permeability, containing aromatic sulfonic acid and urethane functional rheology modifier
  • Resin composition for cation electrodeposition paint with excellent inner permeability, containing aromatic sulfonic acid and urethane functional rheology modifier

Examples

Experimental program
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Effect test

preparation example Construction

[0091] In the preparation of the curing agent resin of the present invention, the blocked polyisocyanate that can react with the modified polyol compound can be freely selected from conventional blocked polyisocyanates known to be useful in cationic electrodeposition resin compositions. Without limitation, the blocked polyisocyanate is preferably a reaction product of an aliphatic or aromatic diisocyanate and a hydroxyl-containing acrylate compound or alcohol compound.

[0092] Aliphatic or aromatic diisocyanates are preferably selected from 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, diphenylmethane-4,4'-diisocyanate and tetramethylene and hexamethylene diisocyanate , more preferably selected from 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, diphenylmethane-4,4'-diisocyanate and tetramethylene and hexamethylene diisocyanate. The hydroxyl group-containing acrylate compound is preferably 2-hydroxyethyl methacrylate. The alcohol compound is preferably selected fr...

preparation Embodiment 1

[0117] As the aromatic sulfonic acid compound contained in the electrodeposition resin composition of the present invention, a xylenesulfonic acid compound was prepared by the method explained below according to the composition of Table 1 below.

[0118] [Table 1] Preparation of xylenesulfonic acid compound

[0119] raw material

[0120] Into a 3-neck 2L flask equipped with a thermometer, a cooler and a mechanical stirrer, sulfuric acid (A) and xylene (B) as shown in Table 1 were added and heated to 110° C., then maintained for 2 hours. Sulfuric acid (C) was slowly added thereto and maintained at 125°C for 2 hours. At 125°C, 23.2 g of a portion including water (D) was removed from the reactor, and then the reactor was cooled to 90°C. Distilled water (E) was added thereto for 1 hour, and the reactor was cooled to below 60°C to terminate the reaction. The reaction was carried out with care as the reaction mixture tended to boil over during the reaction. The product ...

preparation Embodiment 2

[0122] For the electrodeposition resin composition of the present invention, a rheology control agent having a carbamate functional group was prepared by the method explained below according to the composition of Table 2 below.

[0123] [Table 2] Preparation of rheology control agent

[0124] raw material

[0125] In a 3-neck 2L flask equipped with a thermometer, a cooler and a mechanical stirrer, YD-128 (A) and ethoxylated bisphenol-A (B) shown in Table 2 were added and heated to 140° C., then Xylene (C) and benzyldimethylamine (D) were added thereto and maintained at 140° C. for 4 hours. After cooling the reactor to 120°C, the portion including water (E) was removed from the reactor under reduced pressure, and the reactor was further cooled to 100°C. Methoxypropanol (F) was then added and the reactor was further cooled to 80°C. The premixed diisocyanate (G) and dimethylethanolamine (H) were slowly added dropwise at 80°C for 1 hour, then maintained at 80°C for 1 h...

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Abstract

The present invention relates to a resin composition for cation electrodeposition paint with excellent inner permeability, containing aromatic sulfonic acid and urethane functional rheology modifier, and to a use thereof. More particularly, the present invention relates to a resin composition for cation electrodeposition paint, comprising (1) a base resin containing reaction products of polysulfide compounds and epoxy compounds and reaction products of amine compounds and epoxy compounds; (2) a curing agent resin containing reaction products of modified polyol compounds derived from analogous-Mannich reaction products of phenol compounds, aliphatic or aromatic amine compounds and formalin, and blocked polyisocyanate compounds; (3) aromatic sulfonic acid; and (4) a rheology modifier having an urethane function group. The resin composition of the present invention is specially suitable as a primer for vehicle and industrial use as the resin composition of the present invention is excellent in water-dispersion stability, inner permeability, and anti-bacterial property, exhibits superior flexibility, anti-corrosion property, and coating property of the film of paint, and exhibits improved anti-corrosion property at the edge of the film of paint. The present invention also relates to a cation electrodeposition paint comprising the resin composition.

Description

technical field [0001] The present invention relates to a resin composition for cationic electrodeposition coating with excellent internal permeability (or deep plating ability) containing aromatic sulfonic acid and carbamate functionalized rheology modifier (or rheology control agent), and its application. More specifically, the present invention relates to a resin composition for cationic electrodeposition paint, which comprises (1) a base resin containing a reaction product of a polysulfide compound and an epoxy compound, and a reaction product of an amine compound and an epoxy compound; 2) A curing agent resin containing a reaction product of a modified polyol compound and a blocked polyisocyanate compound, wherein the modified polyol compound is derived from a phenolic compound, an aliphatic or aromatic amine compound, and formalin-like Manny products of Mannich-like reactions; (3) aromatic sulfonic acids; and (4) rheology control agents with carbamate functional groups,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/32C09D5/44
CPCC09D5/4438C08G59/182C09D5/448C09D163/00C09D5/4453C09D5/44C09D175/04
Inventor 金载孝吴溢锡金光善郑夏泽宋胤锡
Owner KCC CORP CO LTD
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