WATER-DISPERSIBLE PLASTICS PRECURSORS CONTAINING ISOCYANATE GROUP, MANUFACTURE OF AQUEOUS PLASTICS DISPERSIONS USING SAID PRECURSORS AND USE OF SAID PRECURSORS AS AQUEOUS PLASTICS DISPERSION BRIDGING AGENT

摘要

The present invention relates to water-dispersible plastics precursors which are solid at temperatures below about 40 DEG 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 isocyanate-reactive groups.