Aqueous metal based paint composition
A basic coating and composition technology, applied in the field of water-based metal basic coating compositions, can solve the problems of disclosing any content, etc., and achieve the effects of excellent smoothness, excellent physical properties, and excellent sparkle.
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[0149] Hereinafter, the present invention will be described in more detail by way of examples, but the present invention is not limited to these examples. In addition, "part" and "%" in the following example represent "mass part" and "mass %", respectively.
[0150]
manufacture example 1
[0152] In a reaction vessel, 115.5 parts of polytetramethylene glycol adipate having a number average molecular weight of 2000, 115.5 parts of polycaprolactone diol having a number average molecular weight of 2000, 23.2 parts of dimethylolpropionic acid, and 1,4-butane were added. 14.5 parts of diols and 120.1 parts of isophorone diisocyanate were put into a polymerization vessel, and were reacted at 85° C. for 7 hours in a nitrogen stream with stirring to obtain a prepolymer with an NCO content of 4.0%. Next, the prepolymer was cooled to 50° C., 165 parts of acetone was added and dissolved uniformly, then 15.7 parts of triethylamine was added with stirring, and 600 parts of deionized water was added while keeping the temperature below 50° C. The dispersion was kept at 50 °C for 2 hours, and the water growth reaction was completed, and then the acetone was distilled off under reduced pressure below 70 °C, and the pH was adjusted to 8.0 with triethylamine and deionized water, an...
manufacture example 2
[0155] 100 parts of deionized water, 2.5 parts of "Newcol 707SF" (manufactured by Nippon Emulsifier Co., Ltd., anionic emulsifier having a polyethylene oxide chain, solid content 30%) and a monomer mixture (9 parts of styrene, 1 part among 39 parts of n-butyl acrylate, 40 parts of 2-ethylhexyl acrylate, 10 parts of 2-hydroxyethyl acrylate, 1 part of methacrylic acid, and 1 part of allyl methacrylate), using nitrogen gas flow The mixture was stirred and mixed, and 3 parts of a 3% aqueous ammonium persulfate solution was added at 60°C. Next, the temperature was raised to 80° C., and a pre-emulsion containing the remaining 99 parts of the monomer mixture, 2.5 parts of “Newcol 707SF”, 4 parts of 3% ammonium persulfate, and 100 parts of deionized water was added to the reaction using a metering pump over 4 hours. The container was aged for 1 hour after the addition was completed. Then, 33 parts of deionized water was added, and the pH was adjusted to 7.5 with dimethylethanolamine ...
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