Process for finishing paper using polyisocyanates having anionic groups

摘要

PCT No. PCT/EP96/02168 Sec. 371 Date Nov. 25, 1997 Sec. 102(e) Date Nov. 25, 1997 PCT Filed May 20, 1996 PCT Pub. No. WO96/38629 PCT Pub. Date Dec. 5, 1996The use of water-dispersible polyisocyanates with anionic and/or potentially anionic groups and cationic and/or potentially cationic compounds in paper finishing leads not only to higher retention but also to improved dry and wet strength and sizing.