摘要:
The invention relates to aqueous coatings comprising (A) a water-thinable polyacrylate resin and (B) a blocked polyisocyanate or a mixture of blocked polyisocyanates, wherein the water-thinable polyacrylate resin (A) has a hydroxyl number of 60 to 180, an acid number of 10 to 100, and a glass transition temperature (Tg) of -40.degree. C. to +60.degree. C.
摘要:
The invention relates to coating compositions which are particularly suitable for the preparation of the basecoat for two-coat coatings of the basecoat/clearcoat type, and which comprise organic diluents, at least one resin containing urethane and urea groups, and, where appropriate, other resins, pigments and other conventional additives in common use. The coating compositions according to the invention are those which comprise at least one resin containing urethane and urea groups, which resin is obtainable by reactinga1) a compound having two hydroxyl groups reactive toward isocyanate groups, witha2) an aliphatic and/or cycloaliphatic di-isocyanateto form a prepolymer (A) containing isocyanate groups, and by subsequently reacting the isocyanate groups of the prepolymer (A), at least in part, witha3) an adduct produced from a (meth)acrylic ester, preferably an acrylic ester, and an aliphatic or cycloaliphatic compound containing at least two aminic hydrogen atoms, the adduct containing at least one active aminic hydrogen atom.