TWO-COMPONENT SYSTEMS BASED ON WATER-SOLUBLE POLYESTERS AND CROPPED ISOCYANATES FOR FORMULATING WATER-DILUTABLE BINNING LACQUERS

摘要

Aqueous two-component binder system, contains water-dilutable polyester and polyfunctional aromatic isocyanate reacted with specified blocking agent. In an aqueous 2-component binder system, in which the first component is a water-dilutable polyester (AB) with a hydroxyl (OH) of NOTLESS 10 mg/g, the blocked polyfunctional isocyanate (C) used as second component is obtained by reacting an aromatic isocyanate (C1) and a blocking agent (C2). (C2) is selected from 3-10 carbon (C) primary alcohols (C21) with a double bond on the C atom adjacent to the hydroxymethylene group, oximes (C22) of 3-15 C linear, branched or cyclic aliphatic ketones, CH-acid compounds (C23), in which the C atom with the active H can have other group(s) selected from R1-CO-, R2-O-CO-, nitro (NO2) and R3-SO2- and NH-acid compounds (C24). R1, R2, R3 = 1-18 C linear, branched or cyclic alkyl or 5-15 C aryl. An Independent claim is also included for aqueous lacquers containing this binder system.