Aqueous basecoat composition comprising a silane-based additive and having improved adhesion properties and multilayer coatings produced from said basecoat compositions

The present invention relates to an aqueous basecoat composition comprising a specific silane-based additive as hardener/self-crosslinking material to improve the adhesion of the basecoat to the under- and overlying coating layers, as well as the cohesion property of the basecoat itself. The present...

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Bibliographische Detailangaben
Hauptverfasser:	GLOMB, Melanie, SCHROEDER, Stefanie, WINSBERG, Jan, HOEVELMANN, Claas Henrik, WENKING, Ulrike, ALTER, Christian, KLEIN, Guenter
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS 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 POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	The present invention relates to an aqueous basecoat composition comprising a specific silane-based additive as hardener/self-crosslinking material to improve the adhesion of the basecoat to the under- and overlying coating layers, as well as the cohesion property of the basecoat itself. The present invention further relates to a mixer system for preparing an aqueous refinish basecoat composition comprising at least one base color component, at least one pigment-free component, at least one hardening component comprising the silane-based additive and optionally at least one rheology module as well as a method to prepare an aqueous basecoat composition from said mixer system. The present invention further relates to a method of coating a substrate with the inventive basecoat composition and a clearcoat composition and jointly curing the basecoat and clearcoat composition as well as to a coated substrate obtained from the inventive process. The present invention finally relates to the use of the silane-based compound as hardening additive in aqueous basecoat compositions.