C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 175/04 (2006.01) C08G 18/08 (2006.01) C08G 18/28 (2006.01) C08G 18/62 (2006.01) C08G 18/66 (2006.01) C08G 18/70 (2006.01) C08G 18/75 (2006.01) C08G 18/79 (2006.01)
Patent
CA 2088805
Mo-3851 LeA 28,894 COATING COMPOSITIONS, A PROCESS FOR THEIR PRODUCTION AND THEIR USE FOR COATING WATER-RESISTANT SUBSTRATES ABSTRACT OF THE DISCLOSURE The present invention relates to an aqueous two-component coating composition wherein the binder contains a) a component which is dissolved and/or dispersed in water, has an average hydroxyl number of 15 to 200 mg KOH/g and contains a1) a polyol component having a content of 8 to 450 milliequivalents, per 100 g of component a1) solids, of chemically incorporated ammonium groups, -N=+ and containing one or more polyaddition, polymerization and/or polycondensation resins which are water-dilutable, contain hydroxyl groups and have a molecular weight (Mn) of at least 500 and a2) up to 10 wt%, based on the weight of component a1), of one or more reactive diluents which are water-soluble, have a molecular weight (Mn) below 500 and contain at least one isocyanate-reactive group, and b) a polyisocyanate component having an NCO content of 5 to 25 wt% and containing one or polyisocyanates which are emulsified in the aqueous solution and/or dispersion of hydroxyl group-containing component a), wherein components a) and b) are present in an amount sufficient to provide an equivalent ratio of isocyanate groups of component b) to isocyanate-reactive groups of component a) of 0.5:1 to 5:1. The present invention also relates to a process for the production of this coating composition and to their use for the production of coatings on water-resistant substrates. Mo3851
Kubitza Werner
Reiff Helmut
Schwindt Jurgen
Aktiengesellschaft Bayer
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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