Method of making organic solvent free aqueous coating compositions of acrylic polymer latex, water soluble emulsion-polymerized acrylic polymer, and aminoplast

摘要: Water-based paints having improved properties and application characteristics are disclosed. The paint, exclusive of optional components such as pigments, particulate fillers catalysts, comprises a liquid, continuous aqueous phase. About 30 to about 50% by weight this phase the aforecited components, is made up mixture (a) an amino resin crosslinking agent; (b) at least two copolymers acrylic monomers; (c) amine. balance water or, in certain embodiments, organic solvent. (1) 5 50, preferably 10 30, parts "solution polymer", i.e., carboxy-functional copolymer monomers that (i) partially neutralized with amine, (ii) soluble said phase, (iii) has average molecular (Mn) range 3,000 20,000, (iv) Tg -15 DEG 50 C., (2) 95, 70 90, "emulsion acrlic carboxy, hydroxy or carboxy hyroxy functionality essentially insoluble 20,000 C. agent present amount 15 35 percent sum solution polymer emulsion polymer. amine water-soluble sufficient solubilize pH 7 10, most commonly 7.1 8.5. invention claimed directed method for producing wherein both produced emusion polymerization.