发明名称 |
METHOD FOR INCREASING THE DRY STRENGTH OF PAPER, PAPERBOARD, AND CARDBOARD |
摘要 |
Process for the production of paper, board and cardboard having high dry strength by addition of (a) at least one trivalent cation in the form of a salt, (b) at least one water-soluble cationic polymer and (c) at least one water-soluble amphoteric polymer to the paper stock, draining of the paper stock with sheet formation and subsequent drying of the paper products, the water-soluble cationic polymer (b) being selected from the group consisting of the (i) polymers comprising vinylamine units and (ii) polymers comprising ethylenimine units. |
申请公布号 |
EP2443284(A1) |
申请公布日期 |
2012.04.25 |
申请号 |
EP20100724788 |
申请日期 |
2010.06.07 |
申请人 |
BASF SE |
发明人 |
JEHN-RENDU, CHRISTIAN;KRUEGER, ELLEN;HAEHNLE, HANS-JOACHIM;RUEBENACKER, MARTIN;SCHALL, NORBERT;MUEHLENBERND, THOMAS |
分类号 |
D21H21/18 |
主分类号 |
D21H21/18 |
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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