SOLID, WATER-DISPERSIBLE PLASTICS PRECURSORS CONTAINING ISOCYANATE GROUPS, A PROCESS FOR THE PRODUCTION OF AQUEOUS PLASTICS DISPERSIONS USING SUCH PLASTICS PRECURSORS AND THE USE OF SUCH PLASTICS PRECURSORS AS CROSS-LINKING AGENTS FOR AQUEOUS

摘要

SOLID, WATER-DISPERSIBLE PLASTICS PRECURSORS CONTAINING ISOCYANATE GROUPS, A PROCESS FOR THE PRODUCTION OF AQUEOUS PLASTICS DISPERSIONS USING SUCH PLASTICS PRECURSORS AND THE USE OF SUCH PLASTICS PRECURSORS AS CROSS-LINKING AGENTS FOR AQUEOUS PLASTICS DISPERSIONS The present invention relates to water-dispersible plastics precursors which are solid at temperatures below about 40.degree.C. The plastics precursors are based on isocyanate-terminated prepolymers which have been hydrophilically modified with ionic groups and/or ethylene oxide units and which contain specified amounts of isocyanate groups and -NH- groups. The present invention also relates to processes for preparing aqueous dispersions from the solid plastics precursors and to using the plastics precursors for cross-linking dispersed plastics containing isocyanatereactive groups.