PROCESS FOR PRODUCING MULTI-LAYER PROTECTIVE AND/OR DECORATIVE COATINGS ON THE SURFACE OF SUBSTRATES

The invention concerns a basecoat/clearcoat in which the basecoat composition used contains a polyurethane resin as a film-forming material. The polyurethane resin is made by first preparing an intermediate product from (A) a mixture of 10-90 mol% of linear polyetherdiols and 90-10 mol% of polyester...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	HILLE, HANS-DIETER, MULLER, HORST, WIEDITZ, STEPHAN, DOBBELSTEIN, ARNOLD
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	ADHESIVES APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON CORRECTING FLUIDS DYES FILLING PASTES INKS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PERFORMING OPERATIONS POLISHES PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL SPRAYING OR ATOMISING IN GENERAL THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	The invention concerns a basecoat/clearcoat in which the basecoat composition used contains a polyurethane resin as a film-forming material. The polyurethane resin is made by first preparing an intermediate product from (A) a mixture of 10-90 mol% of linear polyetherdiols and 90-10 mol% of polyesterdiols, (B) diisocyanates, (C) compounds containing two groups which react with isocyanate groups, at least some of these compounds having a group capable of forming an anion. The free isocyanate groups of this intermediate product are subsequently reacted with (D) polyols containing at least three hydroxyl groups, and the reaction product thus obtained is then converted into an aqueous phase. Whereby a) the polyesterdiol is made from diols and an acid component consisting of 60-100 % by weight of aliphatic dicarbonic acids with not more than 18 C-atoms and of 40-0 % by weight of aliphatic dicarbonic acids with 2 to 18 C-atoms, b) the ratio by equivalents of the NCO-groups to the sum of the OH-groups in (A) and the reactive groups in (C) is 2:a to 1.05:1, c) the ratio by equivalents of the OH-groups in component (D) to the NCO-groups in the intermediate product is 0.5:1 to 4:1.