Method of producing cross-linked cationic polymers

摘要

PCT No. PCT/EP96/01825 Sec. 371 Date Jan. 8, 1998 Sec. 102(e) Date Jan. 8, 1998 PCT Filed May 2, 1996 PCT Pub. No. WO96/35738 PCT Pub. Date Nov. 14, 1996Cross-linked cationic polymers are prepared by alkylating a polyaminoalide with 5 to 30 mole percent, relative to the amount of nitrogen available for alkylation, of a quaternary ammonium alkylating agent and cross-linking the resulting alkylated polyaninoamide with a molar amount of epichlorohydrin corresponding to the non-quaternized nitrogen content. The cross-linked cationic polymers are suitable for use as wet-strength resins in the treatment of paper.