Aqueous coating composition of acrylic polymer latex, acrylic polymer solution and aminoplast and method of making

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 percent 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., carboxyfunctional 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 C., (2) 95, 70 90, "emulsion carboxy, hydroxy or carboxy functionality essentially insoluble C. agent present amount 15 35 sum solution polymer emulsion polymer. amine water-soluble sufficient solubilize pH 7 10, most commonly 7.1 8.5.