Patent ID: 6350796
Filing Date: 2002-02-26
Classification: C08G,C09D

Abstract:
A two-component system based on aqueous dispersions of hydrophilic adducts Ah having hydroxyl groups as reactive groups and unblocked difunctional or polyfunctional isocyanates B, said hydrophilic epoxy adducts Ah are selected from the group consisting of cationically stabilized hydrophilic epoxy adducts Ak, which has only tertiary and no primary or secondary amino groups; anionically stabilized hydrophilic epoxy adducts Aa; nonionically stabilized epoxy adducts An, which include polyoxyalkylene segments having a mass fraction of at 20 percent of oxyethylene groups; and zwitterionically stabilized epoxy-amine adducts Aakwherein cationically stabilized hydrophilic adducts Ak are adducts of epoxy resins A1, which have a specific epoxy group content of from 300 to about 11,500 mmol/kg, and amines A2, which have one primary or secondary amino group per molecule, but no tertiary amino groups, and the only tertiary amino groups present in adduct Ak are those formed in the addition reaction of said epoxy resins A1 and amines A2; and anionically stabilized hydrophilic epoxy adducts Aa are adducts of said epoxy resins A1 and polybasic acids A3, which are selected from the group consisting of phosphoric acid, alkylphosphonic acids of the formula R4PO2H2, where R4 is a (C1-C4)-alkyl group, arylphosphonic acids, hydroxyalkylphosphonic acids and the corresponding phosphonic acids R4PO2H2.