Aqueous and/or water-soluble polyisocyanates blocked with secondary benzylamine

摘要

Post-crosslinkable polyurethane-polyurea dispersion comprises polyisocyanate, polymeric polyol having average molar weight of 400- 6000, optionally mono- or polyalcohol or mono- or polyamine having average molar weight of up to 400, at least one blocking agent, and at least one compound chosen from compounds having at least one ionic or potentially ionic group and nonionically hydrophilicizing compounds. Post-crosslinkable polyurethane-polyurea dispersion comprises polyisocyanate, polymeric polyol having average molar weight of 400-6000, optionally mono- or polyalcohol or mono- or polyamine having average molar weight of up to 400, at least one blocking agent, and at least one compound chosen from compounds having at least one ionic or potentially ionic group and nonionically hydrophilicizing compounds. At least 20 wt.% of the blocking agent comprises aralkylamine. Independent claims are included for the following: (1) method for producing one of paints and coating compositions, sizes and glass fiber sizes; (2) coating compositions, sizes and glass fiber sizes, comprising the post-crosslinkable polyurethane-polyurea dispersion; (3) substrate coated with coating composition; and (4) glass fibers sized with size comprising the dispersion.