| 摘要 |
A coloured, water-dissipatable polyurethane having a weigth average molecular weight </= 30,000 Daltons obtained from the reaction of components comprising i) a polyisocyanate, ii) a compound providing ionic water-dispersing groups, iii) a colorant having two or more functional groups and iv) optionally a colorant having one functional group wherein the coloured, water-dissipatable polyurethane comprises at least 18% by weight of colorant. |
