| 摘要 |
Preparing polycarbodiimide and aqueous dispersion of polycarbodiimide, comprises converting at least an aliphatic or cycloaliphatic polyisocyanate at 160-230[deg] C in the presence of 50-3000 ppm of carbodiimidization catalyst, based on the molar amount of polyisocyanate, to polycarbodiimide having an average functionality of 1-10 carbodiimide units, where the reaction gases are temporarily or permanently removed. Independent claims are included for: (1) the polycarbodiimide, obtained by the above process; (2) 4,4'-(4,4'-(methanediylidenebis(azan-1-yl-1-ylidene))bis(cyclohexane-4,1-diyl))bis(methylene)bis(cyclohexane-4,1-diyl)dicarbamic acid compound of formula (II); and (3) an aqueous dispersion comprising (II). R2, R3 : monoalkoxy-poly(ethylene glycol) group of formula (R1-O-(CH 2-CH 2-O) n-H) (I), 1-30C alcohol or 1-30C monoalkoxyethylene glycol; R1 : 1-30C alkyl, 1-30C aryl or 1-30C acyl; and n : 4-30. [Image]. |
