Patent ID: 6492457
Filing Date: 2002-12-10
Classification: C08G,C09D

Abstract:
An aqueous two-component binder system, its first component comprising a water-dilutable polyester AB having a hydroxyl number of at least 10 mg/g and its second component consisting of a blocked polyfunctional water-insoluble isocyanate C, wherein the blocked isocyanate C is prepared by reaction of an aromatic isocyanate C1 and a blocking agent C2 for the isocyanate, C2 being selected from primary alcohols C21 having 3 to 10 carbon atoms, in which the carbon atom adjacent to the hydroxymethylene group carries a double bond, oximes C22 of linear, branched or cyclic aliphatic ketones having 3 to 15 carbon atoms, CH-acidic compounds C23, in which the carbon atom which carries the active hydrogen carries at least one further group selected from R1â€”COâ€”, R2â€”Oâ€”COâ€”, â€”NO2 and R3â€”SO2â€”, R1, R2 and R3 independently of one another being selected from the group consisting of linear, branched or cyclic alkyl groups having 1 to 18 carbon atoms or aryl groups having 5 to 15 carbon atoms, and NH-acidic compounds C24.