发明名称 |
Making paper, board and cardboard of high dry strength |
摘要 |
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 solution at 45 DEG 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.
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申请公布号 |
US4940514(A) |
申请公布日期 |
1990.07.10 |
申请号 |
US19880223334 |
申请日期 |
1988.07.25 |
申请人 |
BASF AKTIENGESELLSCHAFT |
发明人 |
STANGE, ANDREAS;DEGEN, HANS-JUERGEN;AUHORN, WERNER;WEBERNDOERFER, VOLKMAR;KROENER, MICHAEL;HARTMANN, HEINRICH |
分类号 |
D21H17/34;D21H17/28;D21H17/45;D21H21/18 |
主分类号 |
D21H17/34 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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