Patent ID: 8492499

Claim:
An addition compound or mixture thereof, or a salt or salts thereof, produced by the process of reacting a) one or more polyisocyanates containing uretdione groups with b) one or more compounds of the formula (I) Y—(XH) n (I) where XH is a group that is reactive towards isocyanates and Y is a monomeric or polymeric organic group that is not reactive towards isocyanates and that comprises one or more aliphatic, cycloaliphatic, araliphatic and/or aromatic groups, Y possessing a number-average molar mass of at least 400 g/mol and less than 20 000 g/mol, and n is 1, 2 or 3, and for at least 75 mol % of the compounds of the formula (I), n shall equal 1, with the proviso that at least 50% of the free isocyanate groups of the polyisocyanate, component a), are reacted with the compounds of the formula (I) to give an intermediate which contains uretdione groups, and subsequently the intermediate is reacted with c) one or more compounds of the general formula (II) Z—(NHR) m (II) in which R is hydrogen, an aliphatic, cycloaliphatic, araliphatic and/or aromatic radical having up to 36 C atoms, or a polyoxyalkylene radical, m is 1, and Z is a non-basic aliphatic, cycloaliphatic, araliphatic and/or aromatic radical and/or polyoxyalkylene or polysiloxane radical having a number-average molar mass of less than 10 000 g/mol, which if desired may contain the following functional groups: —OH —COOH —SO 3 H —PO 3 H 2 —Si(OR) 3 and —SiR(OR) 2 where the hydroxyl groups are optionally further reacted with polyphosphoric acid or P 2 O 5 or with polycarboxylic acids having at least two carboxyl groups or their anhydrides in an amount such that for each OH group to be reacted there is at least 0.8 molecule of polycarboxylic acid or polycarboxylic anhydride employed; with the proviso that all free NCO groups that may still be present and at least 20% of the uretdione groups used originally are reacted with Z—(NHR)m.