POLYESTER-POLYURETHANE-POLY(METH)ACRYLIC HYBRID DISPERSION

The present invention relates to a polyester-polyurethane-poly(meth)acrylic hybrid dispersion obtainable by esterifying at least one polyurethane containing carboxyl groups, the at least one polyurethane having an acid number of more than 200 mg KOH/g to 400 mg KOH/g and at least one or more termina...

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Bibliographische Detailangaben
Hauptverfasser:	SCHOEPPING, Tobias, ZIHANG, Thomas, RASPE, Nicola
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ADHESIVES 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 BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS 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 a polyester-polyurethane-poly(meth)acrylic hybrid dispersion obtainable by esterifying at least one polyurethane containing carboxyl groups, the at least one polyurethane having an acid number of more than 200 mg KOH/g to 400 mg KOH/g and at least one or more terminal carboxyl groups; with at least one polyester containing hydroxyl groups, the polyester having a hydroxyl number of 50 mg KOH/g to 300 mg KOH/g, to obtain a polyester-polyurethane; followed by polymerizing ethylenically unsaturated monomers at least comprising (meth)acrylic monomers by radical polymerization in the presence of the polyester- polyurethane of step (a), wherein one or more solvents are present and/or employed during step (a) and/or (b) and/or added after step (b), thereby obtaining the polyester- polyurethane-poly(meth)acrylic hybrid dispersion. Furthermore, the invention relates to a coating composition comprising a polyester-polyurethane-poly(meth)acrylic hybrid dispersion, a coating layer formed thereof and a thus coated substrate. Moreover, the invention relates to the use of a coating composition comprising a polyester- polyurethane-poly(meth)acrylic hybrid dispersion in automotive coating and a method of making a multilayer coating, wherein at least one coating layer is formed from a coating composition comprising a polyester-polyurethane-poly(meth)acrylic hybrid dispersion. La présente invention se rapporte à une dispersion hybride polyester-polyuréthane-poly(méth)acrylique pouvant être obtenue par estérification d'au moins un polyuréthane contenant des groupes carboxyle, ledit polyuréthane ayant un indice d'acide de plus de 200 mg de KOH/g à 400 mg de KOH/g et au moins un ou plusieurs groupes carboxyle terminaux ; avec au moins un polyester contenant des groupes hydroxyle, le polyester ayant un indice d'hydroxyle de 50 mg de KOH/g à 300 mg de KOH/g, pour obtenir un polyester-polyuréthane ; suivi de la polymérisation de monomères à insaturation éthylénique comprenant au moins des monomères (méth)acryliques par polymérisation radicalaire en présence du polyester-polyuréthane de l'étape (a), un ou plusieurs solvants étant présents et/ou utilisés pendant l'étape (a) et/ou (b) et/ou ajoutés après l'étape (b), ce qui permet d'obtenir la dispersion hybride polyester-polyuréthane-poly(méth)acrylique. En outre, l'invention se rapporte à une composition de revêtement comprenant une dispersion hybride polyester-polyuréthane-poly(méth)acrylique, à une