D - Textiles – Paper – 21 – H
Patent
D - Textiles, Paper
21
H
9/43
D21H 17/20 (2006.01) B27N 1/02 (2006.01) D21H 17/28 (2006.01) D21H 17/45 (2006.01) D21H 23/10 (2006.01) D21H 21/18 (2006.01)
Patent
CA 1302021
O.Z. 0050/39344 Abstract of the Disclosure: Paper, board, and cardboard having high dry strength are made by adding to the paper stock a dry strength agent which is obtainable by mixing enzymatically digested starch having a viscosity of from 20 to 2,000 mPa.s (measured in 7.5% strength aqueous sol- ution at 45°C) and a cationic polymer which contains, as typical copolymerized monomers, a) diallyldimethylammonium chloride, b) N-vinylamine or c) an unsubstituted or substituted N-vinylimidazoline, the K value of the cationic polymer in each case being not less than 30, and draining the paper stock with sheet formation.
572015
Auhorn Werner
Degen Hans-Juergen
Hartmann Heinrich
Kroener Michael
Stange Andreas
Basf Aktiengesellschaft
Borden Ladner Gervais Llp
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