公开(公告)号：DE502006006358D1

公开(公告)日：2010-04-15

申请号：DE502006006358

申请日：2006-10-25

Applicant: BASF SE

Inventor： WESTER BETTINA ,  BRAIG VOLKER ,  GAUWEILER WERNER ,  LEDUC MARC ,  BECKER STEFAN ,  FEUERHAKE ROBERT

IPC: C08F26/02 ,  C08F290/14 ,  D21H17/34

Abstract: The invention relates to aqueous dispersions of water-soluble polymers of N-vinyl-carboxamides, which are substantially salt-free and comprise anionic polymeric stabilizers having a comb-like molecular structure, processes for the preparation of the dispersions in the presence of anionic polymeric stabilizers having a comb-like molecular structure and the use of the dispersions as retention aids or fixing agents in papermaking.

公开(公告)号：PT1945683E

公开(公告)日：2010-03-18

申请号：PT06807519

申请日：2006-10-25

Applicant: BASF SE

Inventor： GAUWEILER WERNER ,  BRAIG VOLKER ,  WESTER BETTINA ,  LEDUC MARC ,  BECKER STEFAN ,  FEUERHAKE ROBERT

IPC: C08F26/02 ,  C08F290/14 ,  D21H17/34

公开(公告)号：DE50213179D1

公开(公告)日：2009-02-12

申请号：DE50213179

申请日：2002-11-19

Applicant: BASF SE

Inventor： LEDUC MARC ,  FRENZEL STEFAN ,  MAHR NORBERT

IPC: C08F26/02 ,  C08L39/00 ,  C02F1/56 ,  C08F2/10 ,  C08F2/44 ,  C08F8/04 ,  C08F8/12 ,  C08F283/06 ,  C08F285/00 ,  C08L101/14 ,  D21H21/10 ,  D21H21/18

Abstract: Aqueous dispersions of water-soluble polymers of N-vinylcarboxamides, which contain, as a stabilizer, water-soluble, crosslinked graft polymers which are obtainable by free radical polymerization of compounds having at least two ethylenically unsaturated double bonds in the presence of polyalkylene glycols, are prepared by free radical polymerization of N-vinylcarboxamides in an aqueous medium in the presence of said stabilizers and are used as drainage aids, flocculants and retention aids, as wet and dry strength agents and as fixing agents in papermaking.

公开(公告)号：CA2665712A1

公开(公告)日：2008-05-08

申请号：CA2665712

申请日：2007-10-29

Applicant: BASF SE

Inventor： LEDUC MARC ,  GASCHLER WOLFGANG ,  KRUEGER ELLEN ,  HAMERS CHRISTOPH ,  CHAMP SIMON ,  HENTZE HANS-PETER

IPC: D21H21/10 ,  D21F11/04

Abstract: The invention relates to the production of a multi layer fiber web from c ellulose fibers by separately feeding of at least two different fiber suspen sions and water into a multi layer head box, wherein separating elements sep arate them from each other and from the water. After leaving the nozzle mout h of the head box, they are transported to a device on which a web is formed . The water is guided in a way, such that it ends up in form of a layer betw een two layers of fiber suspensions on the web forming device after exiting the nozzle mouth and thus prevents mixing of the different fiber suspensions . At least one retention agent and/or at least one dehydrating agent is dose d to the fiber suspension and/or to the added water to increase the retentio n, dehydration and formation.