HYDROPHILE POLYISOCYANATGEMISCHE

摘要

Hydrophilic polyisocyanate mixtures comprise at least one polyacrylate-modified polyisocyanate; optionally, non-polyisocyanates containing aliphatically, cycloaliphatically, aromatically and/or araliphatically attached isocyanate groups; and at least one ionic and/or nonionic emulsifier. Hydrophilic polyisocyanate mixtures comprise at least one polyisocyanate containing at least one structural unit of formula (I); optionally, non-polyisocyanates containing aliphatically, cycloaliphatically, aromatically and/or araliphatically attached isocyanate groups; and at least one ionic and/or nonionic emulsifier. R : H or Me; R 1>optionally heteroatom-containing hydrocarbon radical with up to 22C; R 2>hydrocarbon radical containing at least one isocyanate group and optionally, urethane, allophanate, biuret, uretdione, isocyanurate and/or iminooxadiazinedione units; and n : 1-100. Independent claims are included for: (1) hydrophilicized polyisocyanates based on aromatic, araliphatic, cycloaliphatic, and/or aliphatic polyisocyanates having an isocyanate (NCO) content of 5-25 wt.%, an NCO functionality >=2, a viscosity in solvent-free state of 150-200000 mPa.s at 23[deg]C, containing at least one structural unit of the formula (I) and polyether units of the formula (II) and/or sulfonate and/or phosphate groups; (2) a process for preparing hydrophilic polyisocyanate mixtures by mixing polyisocyanate components mixed with an ionic and/or nonionic emulsifier and/or an emulsifier generated in situ by reacting the polyisocyanate components with hydrophilic, isocyanate-reactive ionic and/or nonionic compounds (the amounts of the starting components are chosen, irrespective of the preparation process, so that the emulsifier is present in 2-60 wt.%, based on the total amount of components); (3) a starting component for polyurethane plastics comprising the hydrophilic polyisocyanate mixtures; (4) a crosslinker component for water-soluble or water- dispersible film-forming binders or film-forming binder components comprising the hydrophilic polyisocyanate mixtures; (5) coating compositions comprising hydrophilic polyisocyanates; and (6) substrates coated with coating compositions. R 3>H or 1-10C alkyl radical; p : 1-1000; and q : 1-3. [Image] [Image].