COATING COMPOUNDS, A PROCESS FOR THEIR PRODUCTION AND THEIR USE FOR THE PRODUCTION OF COATINGS

摘要

Aqueous coating agents, the binder of which consists essentially of a combination of: (a1) a water-dilutable polycondensa- tion resin having hydroxyl groups and without urethane and sulphonate groups , with a molecular weight Mn of over 500; or (a2) a mixture of such a polycondensation resin with up to 100 % wt, in relation to the weight of the polycondensation resin of at least one water-dilutable polymerisation resin with a molecular weight Mn of over 500 and having hydroxyl groups, in aqueous solu- tion or dispersion, and a polyisocyanate component (b) emulsified therein wi th a viscosity at 23 .degree.C of 50-10,000 mPa.s; a process for producing coating agents by emulsifying a polyisocyanate component (b) i n an aqueous solution or dispersion of a polyol- component (a1) or (a2), in which any auxiliaries and additives are incorporated into the system before the addition of the isocya- nate, and the use of the coating agents for applying coatings.