Patent ID: 6316539
Filing Date: 2001-11-13
Classification: C08G,C09D

Abstract:
Water-dilutable urethane-modified paste and mixing resins ABCD, obtained by converting mass fractions in the reaction mixtures of10 to 90% aldehyde or ketone resins A formed through self-condensation or cocondensation together with formaldehyde, of aliphatic or cycloaliphatic ketones or aldehydes, with a hydroxyl number of 20 to 300 mg/g, a softening temperature of 60 to 140.degree. C. and a number average molar mass M.sub.n of 500 to 3000 g/mol;5 to 30% multi-functional isocyanates B with an average of at least 2 isocyanate groups per molecule;0 to 30% aliphatic acids C, each with at least one acid group and at least one group that can react with isocyanate, creating a urethane or urea structure and also,0 to 70% of an aliphatic polyether D with a number average molar mass M.sub.n of 200 to 8000 g/mol, and at least one hydroxyl group per molecule,whereby the total of the mass fractions of educts A to D is always 100% and at least one of the educts C and D is used and if necessary, subsequent neutralisation of the products ABCD with aqueous ammonia or amines, if a compound in accordance with C is used.