公开(公告)号：DE59104096D1

公开(公告)日：1995-02-09

申请号：DE59104096

申请日：1991-10-04

Applicant: BASF AG

Inventor： KROENER MICHAEL ,  NILZ CLAUDIA ,  SENDHOFF NORBERT ,  STANGE ANDREAS ,  DE CLERCQ ARNOLD ,  RIEBELING ULRICH

IPC: D21H17/34 ,  D21H17/45 ,  D21H17/62 ,  D21H21/16

公开(公告)号：CA2157175A1

公开(公告)日：1995-01-26

申请号：CA2157175

申请日：1994-06-27

Applicant: BASF AG

Inventor： DENZINGER WALTER ,  HARTMANN HEINRICH ,  KROENER MICHAEL ,  NILZ CLAUDIA

IPC: C08F6/10 ,  C08F6/00 ,  C08F6/16 ,  C08F8/06 ,  C08F8/12 ,  C08F26/02 ,  D21H21/10

Abstract: The invention concerns a method for the elimination of impurities containing cyanide groups from polymers containing acyclic N-vinyl carboxylic acid amide units and/or vinylamine units by treating the polymer with at least one oxidising agent (a) under the action of light and/or (b) in the presence of heavy-metal ions.

公开(公告)号：NO176526B

公开(公告)日：1995-01-09

申请号：NO910283

申请日：1991-01-24

Applicant: BASF AG

Inventor： FREUDENBERG ENRIQUE ,  LINHART FRIEDRICH ,  TRESCH RAINER ,  HARTMANN HEINRICH ,  DENZINGER WALTER ,  KROENER MICHAEL ,  SENDHOFF NORBERT

IPC: D21H21/04 ,  D21H17/34 ,  D21H17/37 ,  D21H17/41 ,  D21H21/10 ,  D21H27/00

Abstract: In a process for making paper, paperboard and cardboard, paper pulps containing interfering materials are dehydrated in the presence of polymers which, as characteristic constituents, contain copolymerised units of the formulae … … with R and R = H or C1- to C3-alkyl, and have K values of at least 130, the polymers containing less than 10 mol% of units of formula II.

公开(公告)号：FI92083B

公开(公告)日：1994-06-15

申请号：FI883504

申请日：1988-07-25

Applicant: BASF AG

Inventor： STANGE ANDREAS ,  DEGEN HANS-JUERGEN ,  AUHORN WERNER ,  WEBERNDOERFER VOLKMAR ,  KROENER MICHAEL ,  HARTMANN HEINRICH

IPC: D21H17/34 ,  D21H17/28 ,  D21H17/45 ,  D21H21/18

Abstract: In the process, an agent which confers dry strength and can be obtained by mixing enzymatically degraded starch having a viscosity of 20 to 2,000 m Pa.s (determined on a 7.5% strength solution in water at 45 DEG C) with cationic polymers which contain, in copolymerised form,… a) diallyldimethylammonium chloride… b) N-vinylamine or… c) optionally substituted N-vinylimidazolines as characteristic monomers, the K-value of the cationic polymers being at least 30, is added to the paper stock and the stock is dewartered, during sheet formation.

公开(公告)号：NZ240196A

公开(公告)日：1993-10-26

申请号：NZ24019691

申请日：1991-10-11

Applicant: BASF AG

Inventor： KROENER MICHAEL ,  NILZ CLAUDIA ,  SENDHOFF NORBERT ,  STANGE ANDREAS ,  DE CLERCQ ARNOLD ,  REIBELING ULRICH

IPC: D21H17/34 ,  D21H17/45 ,  D21H17/62 ,  D21H21/16 ,  D21H23/10 ,  D21H17/72 ,  D21H23/76

公开(公告)号：FI89730B

公开(公告)日：1993-07-30

申请号：FI880836

申请日：1988-02-23

Applicant: BASF AG

Inventor： DEGEN HANS-JUERGEN ,  PFOHL SIGBERG ,  WEBERNDOERFER VOLKMAR ,  REHMER GERD ,  KROENER MICHAEL ,  STANGE ANDREAS

IPC: D21H17/34 ,  D21H17/28 ,  D21H17/29 ,  D21H17/37 ,  D21H17/45 ,  D21H17/56 ,  D21H21/18 ,  D21H23/04

Abstract: Paper and paperboard of high dry strength are produced by adding a dry strength enhancer to the paper stock and dewatering the paper stock with sheet formation by using as the dry strength enhancer a mixture of a cationic polymer which contains as characteristic monomers copolymerized units of (a) diallyldimethylammonium chloride, (b) N-vinylamine or (c) a substituted or unsubstituted N-vinylimidazoline and has a K value of not less than 30, and natural potato starch which is converted into a water-soluble form by heating in an aqueous medium at above the gelatinization temperature of natural potato starch in the absence of any oxidizing agents or alkali.

公开(公告)号：NO172402C

公开(公告)日：1993-07-14

申请号：NO883274

申请日：1988-07-22

Applicant: BASF AG

Inventor： STANGE ANDREAS ,  DEGEN HANS-JUERGEN ,  AUHORN WERNER ,  WEBERNDOERFER VOLKMAR ,  KROENER MICHAEL ,  HARTMAN HEINRICH

IPC: D21H17/34 ,  D21H17/28 ,  D21H17/45 ,  D21H21/18

Abstract: In the process, an agent which confers dry strength and can be obtained by mixing enzymatically degraded starch having a viscosity of 20 to 2,000 m Pa.s (determined on a 7.5% strength solution in water at 45 DEG C) with cationic polymers which contain, in copolymerised form,… a) diallyldimethylammonium chloride… b) N-vinylamine or… c) optionally substituted N-vinylimidazolines as characteristic monomers, the K-value of the cationic polymers being at least 30, is added to the paper stock and the stock is dewartered, during sheet formation.

公开(公告)号：FI85137C

公开(公告)日：1992-03-10

申请号：FI854623

申请日：1985-11-22

Applicant: BASF AG

Inventor： BRUNNMUELLER FRITZ ,  KROENER MICHAEL ,  GOETZE WALTER ,  SCHMIDT WILLI

IPC: C07B61/00 ,  C07C67/00 ,  C07C231/00 ,  C07C231/06 ,  C07C231/08 ,  C07C231/12 ,  C07C233/03

公开(公告)号：NO166233C

公开(公告)日：1991-06-19

申请号：NO863833

申请日：1986-09-25

Applicant: BASF AG

Inventor： PFOHL SIGBERG ,  KROENER MICHAEL ,  HARTMANN HEINRICH ,  DENZINGER WALTER

IPC: C08F8/12 ,  C08F16/16 ,  C08F18/02 ,  C08F20/52 ,  C08F26/00 ,  C08F26/06 ,  C08F216/16 ,  C08F216/18 ,  C08F218/02 ,  C08F218/04 ,  C08F218/08 ,  C08F218/10 ,  C08F220/00 ,  C08F220/02 ,  C08F220/10 ,  C08F220/18 ,  C08F220/42 ,  C08F220/56 ,  C08F226/02 ,  C08F226/10 ,  D21H17/34 ,  D21H17/36 ,  D21H17/37 ,  D21H17/45 ,  D21H21/18 ,  C08F226/00

Abstract: Water-soluble copolymers containing copolymerized vinylamine units are prepared by copolymerizing (a) from 95 to 10 mol % of N-vinylformamide and (b) from 5 to 90 mol % of an ethylenically unsaturated monomer from the group consisting of vinyl acetate, vinyl propionate, C1-C4-alkyl vinyl ethers, the esters, nitriles and amides of acrylic acid and methacrylic acid and N-vinylpyrrolidone, and then eliminating from 30 to 100 mol % of the formyl groups from the copolymer. Preferred copolymers are copolymers of N-vinylformamide and vinyl acetate, in which from 30 to 100 mol % of the monomer units are hydrolyzed. The copolymers are used in papermaking to increase the dry strength and wet strength of the paper.

公开(公告)号：NO910283D0

公开(公告)日：1991-01-24

申请号：NO910283

申请日：1991-01-24

Applicant: BASF AG

Inventor： FREUDENBERG ENRIQUE ,  LINHART FRIEDRICH ,  TRESCH RAINER ,  HARTMANN HEINRICH ,  DENZINGER WALTER ,  KROENER MICHAEL ,  SENDHOFF NORBERT

IPC: D21H21/04 ,  D21H17/34 ,  D21H17/37 ,  D21H17/41 ,  D21H21/10 ,  D21H27/00 ,  D21H

Abstract: In a process for making paper, paperboard and cardboard, paper pulps containing interfering materials are dehydrated in the presence of polymers which, as characteristic constituents, contain copolymerised units of the formulae … … with R and R = H or C1- to C3-alkyl, and have K values of at least 130, the polymers containing less than 10 mol% of units of formula II.