| 主权项 |
1. A water-emulsifiable polyisocyanate comprising
(A) a polyisocyanate based on at least one (cyclo)aliphatic diisocyanate, (B) a compound (B) comprising at least two isocyanate-reactive groups, and at least one group selected from the group consisting of a thioether group (—S—), a selanyl group (—Se—), a sulfoxide group (—S(═O)—), and a sulfone group (—S(═O)2—), (C) a compound comprising an isocyanate-reactive group and a dispersive group, and (D) optionally a solvent, wherein
a ratio of NCO groups in (A) to isocyanate-reactive groups in (B) and (C) is from 5:1 to 100:1,an ethylene oxide group content, calculated as 44 g/mol, based on a sum of (A), (B), and (C), is at least 12 wt. %,an amount of component (C) is at least 5 and up to 25 wt. %, anda viscosity at 23° C. to DIN EN ISO 3219/A.3 in a cone/plate system with a shear rate of 1000 s−1 is from 2500 mPas to 12 000 mPas. |
