A cathodic electrodeposition coating compositions having improved curing and anti-corrosion resistance
A compound and composition technology, applied in the field of cationic electrodeposition resin composition, can solve the problems of lead, including contrary to international trends, etc.
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Embodiment 1
[0040] The glycidyl ether-amine derived polyol compound derived from the Mannich reaction product according to the present invention was prepared from the components shown in Table 1 according to the method explained below.
[0041] [Table 1]
[0042] Components for the Preparation of Glycidyl Ether-Amine Derivatized Polyol Compounds
[0043] components
[0044] To a three-neck 2L flask equipped with a thermometer, cooler and mechanical stirrer, nonylphenol (A) and m-xylylenediamine (B) were added according to Table 1 and the temperature was raised to 70°C. Formalin (C) was slowly added thereto for 1 hour, and then the temperature was maintained at 95° C. for 2 hours. The temperature was raised to 125°C, and the water produced by the dehydration reaction was recovered. When the amount of recovered water (D) reached 125 g, the reaction mixture was cooled to 90°C. Methylethanolamine (E) and butyl glycidyl ether (F) were added thereto and the reaction mixture was mai...
Embodiment 2
[0046] The crosslinker resin according to the present invention was prepared from the components shown in Table 2 according to the method explained below.
[0047] [Table 2]
[0048] Components for preparing crosslinker resins according to the invention
[0049] components
[0050] To a three-neck 2L flask equipped with a thermometer, cooler and mechanical stirrer, phenyl diisocyanate (A) and methyl isobutyl ketone (B) were added according to Table 2 and the temperature was raised to 40°C. Under injecting air, slowly add 2-hydroxyethanol methacrylate (C) dropwise for 2 hours while detecting the isocyanate content, and when the isocyanate content becomes 5.0-5.5%, trimethylolpropane (D) and the reaction product (E) of Example 1 were added to the reactor. The temperature was raised to 80° C. and maintained for 30 minutes while checking the isocyanate content, and when the isocyanate content became 0.2% or less, the reaction was terminated. After terminating the reac...
Embodiment 3
[0052] A typical crosslinker resin was prepared from the components shown in Table 3 according to the method explained below.
[0053] [table 3]
[0054] Components for preparing general crosslinker resins
[0055] components
[0056] To a three-necked 2L flask equipped with a thermometer, cooler and mechanical stirrer, phenyl diisocyanate (A) and methyl isobutyl ketone (B) were added according to Table 3 and the temperature was raised to 45°C. Butyl cellosolve (C) was slowly added dropwise for 2 hours while checking the isocyanate content, and when the isocyanate content became 5.0-5.5%, trimethylolpropane (D) was added to the reactor. The temperature was raised to 80° C. and maintained for 30 minutes while checking the isocyanate content, and when the isocyanate content became 0.2% or less, the reaction was terminated. After terminating the reaction, the reaction mixture was cooled to 80° C. by natural cooling with dilution with methoxypropanol (E) to complete th...
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