公开(公告)号：EP1183422B1

公开(公告)日：2003-10-08

申请号：EP00920549.3

申请日：2000-03-23

Applicant: BASF AKTIENGESELLSCHAFT

Inventor： LORENCAK, Primoz ,  STANGE, Andreas ,  DIEHL, Kurt ,  MAHR, Norbert

IPC: D21H17/28 ,  D21H17/44 ,  D21H17/45 ,  D21H21/10 ,  C08L3/02 ,  C08L3/04

CPC classification number: D21H21/20 ,  C08B31/00 ,  C08B31/185 ,  C08L3/00 ,  C08L3/02 ,  C08L3/10 ,  D21H17/29 ,  C08L2666/02

Abstract: The invention relates to a method for modifying starch by heating the starch in an aqueous medium to temperatures greater than the pasting temperature of the starch in the presence of (a) a polymer cationization agent selected from the group consisting of polymers with molecular weights up to 1 million containing vinylamine units, polyethylene imines, polydiallyldimethylammonium chlorides, condensates of dimethylamine with epichlorohydrin or dichloroalkanes, condensates of dichloroethane and ammonia and mixtures of the above mentioned compounds, and (b) polymer dehydrators for paper selected from the group consisting of water-soluble, crosslinked polyamidoamines that are optionally grafted with ethylene imine, polymers with molecular weights of greater than 1 million containing acrylamide and/or methacrylamide units, polymers with molecular weights of greater than 1 million containing vinylamine units and mixtures of said compounds. The invention also relates to the reaction products obtained by the inventive method and the use of the reaction products as dry-strength agents in the production of paper, board and paperboard.

公开(公告)号：EP0788516B2

公开(公告)日：2002-10-30

申请号：EP95935455.6

申请日：1995-10-17

Applicant: BASF AKTIENGESELLSCHAFT

Inventor： LINHART, Friedrich ,  STANGE, Andreas ,  SCHUHMACHER, Rudolf ,  HARTMANN, Heinrich ,  DENZINGER, Walter ,  NIESSNER, Manfred ,  NILZ, Claudia ,  REUTHER, Wolfgang ,  MEIXNER, Hubert

IPC: C08B31/00 ,  C08B35/00 ,  D21H17/29 ,  D21H21/20

CPC classification number: C08G73/0213 ,  C08B31/00 ,  C08G81/00 ,  D21H17/29 ,  D21H21/18

Abstract: In a cationic modification process for starch, starch is reacted with polymers that contain amino and/or ammonium groups in an aqueous medium at temperatures from 115 to 180 DEG C under an increased pressure and in the absence of oxidisers, polymerisation initiators and alkali. The reaction is conducted so that maximum 10% by weight starch has its molar weight reduced. Also disclosed is the use of the thus obtained reaction products as dry strength agents for paper.

公开(公告)号：EP0758344A1

公开(公告)日：1997-02-19

申请号：EP95912254.0

申请日：1995-03-20

Applicant: BASF AKTIENGESELLSCHAFT

Inventor： NILZ, Claudia ,  WINTER, Manfred ,  KRÖNER, Michael ,  STANGE, Andreas ,  SCHUHMACHER, Rudolf

IPC: C08F8 ,  D21H17 ,  D21H21

CPC classification number: D21H21/20 ,  C08F8/12 ,  C08F2800/20 ,  D21H17/34 ,  D21H21/18 ,  C08F126/02 ,  C08F226/02 ,  C08F218/08

Abstract: A process for producing long-shelf-life aqueous solutions of vinyl-amine-unit-containing polymers by the hydrolysis of N-vinyl-carbonamide-containing polymers with acids in an aqueous medium and removing the carboxylic acids separated from the polymers as esters from the aqueous polymer solution following hydrolysis and by the addition of at least stoichiometric quantities of at least one C1 to C6 alcohol and distilling the esters off from the reaction mixture. The invention also relates to the use of the long-shelf-life aqueous solutions of vinyl-amine-unit-containing polymers as dry and wet consolidating agents in paper manufacture.

公开(公告)号：EP0489055B1

公开(公告)日：1994-11-02

申请号：EP90912409.1

申请日：1990-08-22

Applicant: BASF Aktiengesellschaft

Inventor： FLORY, Klaus ,  STANGE, Andreas ,  KROENER, Michael ,  SENDHOFF, Norbert

IPC: C08G12/46

CPC classification number: C08G12/46 ,  Y10T428/31949 ,  Y10T428/31964

Abstract: Cationic urea formaldehyde resins are obtained by condensation of urea and formaldehyde in a molar ratio of 1:1.5 to 3 in the presence of at least 1 mol% of polymerizates, obtained by polymerization of vinyl amine units, with Fikentscher K values of 5 to 300 in a quantity of 5 to 100 g/mol of urea in the end-product. The mixture is first a) precondensed at a pH of 8 to 14, then acidified and b) condensed at a pH of 1 to 5 until the onset of gel formation, c) 0.3 to 1.5 mol of formaldehyde per mol of urea used is added, d) subsequent condensation is carried out and e) the resin solution is then neutralized. The resins so obtained are used as additives in paper manufacture to increase the dry and wet strength of paper and reduce the loss of opacity of the whiteness of the paper.

公开(公告)号：EP0972110B1

公开(公告)日：2004-06-02

申请号：EP98921399.6

申请日：1998-03-26

Applicant: BASF AKTIENGESELLSCHAFT

Inventor： DYLLICK-BRENZINGER, Rainer ,  LORENCAK, Primoz ,  MEIXNER, Hubert ,  BAUMANN, Peter ,  KRÜGER, Ellen ,  STANGE, Andreas ,  RÜBENACKER, Martin

IPC: D21H21/10 ,  D21H21/18

CPC classification number: D21H21/10 ,  D21H17/29 ,  D21H17/45 ,  D21H17/455 ,  D21H17/55 ,  D21H17/56 ,  D21H21/18 ,  D21H23/765

Abstract: The invention relates to a method for producing high dry-strength paper, pulpboard and cardboard by adding cationic, anionic and/or amphoteric starch as a dry-strength agent to the paper material, dehydrating the paper material to form sheets in the presence of cationic polymers as starch retention agents, and using cationic polymer retention agents to increase retention of dry-strength agents made from cationic, anionic and/or amphoteric starch during the production of paper, pulpboard and cardboard.

公开(公告)号：EP1183422A1

公开(公告)日：2002-03-06

申请号：EP00920549.3

申请日：2000-03-23

Applicant: BASF AKTIENGESELLSCHAFT

Inventor： LORENCAK, Primoz ,  STANGE, Andreas ,  DIEHL, Kurt ,  MAHR, Norbert

IPC: D21H17/28 ,  D21H17/44 ,  D21H17/45 ,  D21H21/10 ,  C08L3/02 ,  C08L3/04

CPC classification number: D21H21/20 ,  C08B31/00 ,  C08B31/185 ,  C08L3/00 ,  C08L3/02 ,  C08L3/10 ,  D21H17/29 ,  C08L2666/02

Abstract: The invention relates to a method for modifying starch by heating the starch in an aqueous medium to temperatures greater than the pasting temperature of the starch in the presence of (a) a polymer cationization agent selected from the group consisting of polymers with molecular weights up to 1 million containing vinylamine units, polyethylene imines, polydiallyldimethylammonium chlorides, condensates of dimethylamine with epichlorohydrin or dichloroalkanes, condensates of dichloroethane and ammonia and mixtures of the above mentioned compounds, and (b) polymer dehydrators for paper selected from the group consisting of water-soluble, crosslinked polyamidoamines that are optionally grafted with ethylene imine, polymers with molecular weights of greater than 1 million containing acrylamide and/or methacrylamide units, polymers with molecular weights of greater than 1 million containing vinylamine units and mixtures of said compounds. The invention also relates to the reaction products obtained by the inventive method and the use of the reaction products as dry-strength agents in the production of paper, board and paperboard.

公开(公告)号：EP0788516B1

公开(公告)日：1998-07-29

申请号：EP95935455.6

申请日：1995-10-17

Applicant: BASF AKTIENGESELLSCHAFT

Inventor： LINHART, Friedrich ,  STANGE, Andreas ,  SCHUHMACHER, Rudolf ,  HARTMANN, Heinrich ,  DENZINGER, Walter ,  NIESSNER, Manfred ,  NILZ, Claudia ,  REUTHER, Wolfgang ,  MEIXNER, Hubert

IPC: C08B31/00 ,  C08B35/00 ,  D21H17/29 ,  D21H21/20

CPC classification number: C08G73/0213 ,  C08B31/00 ,  C08G81/00 ,  D21H17/29 ,  D21H21/18

Abstract: In a cationic modification process for starch, starch is reacted with polymers that contain amino and/or ammonium groups in an aqueous medium at temperatures from 115 to 180 DEG C under an increased pressure and in the absence of oxidisers, polymerisation initiators and alkali. The reaction is conducted so that maximum 10% by weight starch has its molar weight reduced. Also disclosed is the use of the thus obtained reaction products as dry strength agents for paper.

公开(公告)号：EP0672212A1

公开(公告)日：1995-09-20

申请号：EP94901873.0

申请日：1993-11-25

Applicant: BASF Aktiengesellschaft

Inventor： NILZ, Claudia ,  DENZINGER, Walter ,  HARTMANN, Heinrich ,  KROENER, Michael ,  LINHART, Friedrich ,  SCHUHMACHER, Rudolf ,  MOENCH, Dietmar ,  STANGE, Andreas

IPC: C08F220 ,  C08F8 ,  C08F26 ,  C08F226 ,  D21H17 ,  D21H21

CPC classification number: D21H21/18 ,  C08F8/44 ,  C08F2800/20 ,  C08F2810/50 ,  D21H17/37 ,  D21H21/10 ,  C08F8/12 ,  C08F226/02 ,  C08F220/06

Abstract: Described is the use, as additives to paper-making pulp, of copolymers obtained by polymerizing a) 5 to 99 mole % of N-vinyl carboxylic acid amides, b) 95 to 1 mole % of monoethylenically unsaturated carboxylic acids and/or alkali-metal, alkaline-earth metal, ammonium or amine salts thereof, and optionally c) up to 30 mole % of other monoethylenically unsaturated compounds, and optionally d) up to 2 mole % of crosslinking agents, and subsequently splitting off some or all of the formyl groups from the N-vinyl carboxylic acid amide units in the copolymer to form amine or ammonium groups. Such additives increase the water-removal speed and retention during the manufacture of paper, as well as the dry and wet strength of the paper.

公开(公告)号：EP0573458A1

公开(公告)日：1993-12-15

申请号：EP92904667.0

申请日：1992-02-17

Applicant: BASF Aktiengesellschaft

Inventor： PFOHL, Sigberg ,  AUHORN, Werner ,  STANGE, Andreas ,  LINHART, Friedrich

IPC: D21H17

CPC classification number: D21H17/56 ,  D21H17/375 ,  D21H17/69

Abstract: On produit des boues aqueuses de matières de charge finement pulvérisées et, au moins partiellement, enrobées de polymères, en ajoutant successivement à une boue aqueuse de matières de charge 0,1 à 5 % en poids d'un agent cationique de consolidation du papier et/ou 0,1 à 5 % en poids d'un agent non ionique et/ou anionique de consolidation et/ou d'encollage du papier, par rapport au poids des matières de charge. On utilise une quantité d'agent cationique de consolidation, par rapport aux agents anioniques de consolidation et/ou d'encollage, telle que les matières de charge finement pulvérisées présentent une charge cationique. L'invention concerne également l'utilisation des boues aqueuses de matières de charge finement pulvérisées ainsi obtenues pour produire du papier, du carton ou du carton-pâte contenant des charges par adjonction des boues aqueuses à la pâte à papier et par déshydratation de la pâte à papier.

公开(公告)号：EP0489055A1

公开(公告)日：1992-06-10

申请号：EP90912409.0

申请日：1990-08-22

Applicant: BASF Aktiengesellschaft

Inventor： FLORY, Klaus ,  STANGE, Andreas ,  KROENER, Michael ,  SENDHOFF, Norbert

IPC: C08G12 ,  D21H17

CPC classification number: C08G12/46 ,  Y10T428/31949 ,  Y10T428/31964

Abstract: Les résines décrites sont obtenues par condensation de l'urée et du formaldéhyde en présence d'au moins un mole % de polymérisats obtenus par polymérisation d'unités de vinyle amine, les valeurs K selon Fikentscher étant comprises entre 5 et 300 dans une quantité de 5 à 100 g/mol d'urée dans le produit final. Le mélange est d'abord a) pré-condensé à une valeur pH comprise entre 8 et 14, ensuite acidifié; b) condensé à un pH de 1 à 5 jusqu'à amorçage de la formation d'un gel; c) additionné de 0,3 à 1,5 mole de formaldéhyde par mole d'urée; d) ensuite, la condensation est réalisée et e) la solution de résine est neutralisée. Les résines ainsi obtenues sont utilisées en tant qu'additifs pour la fabrication du papier afin d'augmenter la résistance du papier à l'état sec et humide et pour réduire tout diminution de la blancheur du papier.