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    METHOD FOR PRODUCING HIGH DRY STRENGTH PAPER, PAPERBOARD OR CARDBOARD
    51.
    发明专利
    METHOD FOR PRODUCING HIGH DRY STRENGTH PAPER, PAPERBOARD OR CARDBOARD 未知

    公开(公告)号：CA2586076A1

    公开(公告)日：2006-06-01

    申请号：CA2586076

    申请日：2005-11-21

    Applicant: BASF AG

    Inventor： STURM BERTHOLD ,  ESSER ANTON ,  NIESSNER MANFRED ,  NEUTZNER JOSEF ,  DUPUIS JACQUES ,  SCHALL NORBERT ,  RUEBENACKER MARTIN ,  HAEHNLE HANS-JOACHIM

    IPC: D21H21/18

    Abstract: The invention relates to a process for producing paper, board and cardboard of high dry strength by separately adding a polymer comprising vinylamine units and a polymeric anionic compound to a paper pulp, dewatering the pulp and drying the paper products, which comprises using as polymeric anionic compound at least one copolymer obtainable by copolymerizing (a) at least one N-vinylcarboxamide of the formula in which R1 and R2 are H or C1- to C6 alkyl, (b) at least one monoethylenically unsaturated monomer comprising acid groups, and/or the alkali metal, alkaline earth metal or ammonium salts thereof, and if appropriate (c) other monoethylenically unsaturated monomers, and if appropriate (d) compounds having at least two ethylenically unsaturated double bonds in their molecule.

    55.
    发明专利
    未知

    公开(公告)号：DE50000971D1

    公开(公告)日：2003-01-30

    申请号：DE50000971

    申请日：2000-02-21

    Applicant: BASF AG

    Inventor： HAEHNLE HANS-JOACHIM ,  SCHROEDER ULRICH ,  HEIDER WOLFGANG ,  SCHORNICK GUNNAR ,  ANSTOCK THOMAS

    IPC: A61L15/24 ,  A61L15/42 ,  A61L15/60 ,  B01J20/26 ,  C08J9/12 ,  C08J9/30 ,  C09K3/10 ,  C09K17/20

    Abstract: Water-absorbing, expanded, crosslinked polymers obtainable by(I) foaming a polymerizable aqueous mixture which comprises(a) monoethylenically unsaturated monomers which contain acidic groups and are optionally neutralized,(b) optionally other monoethylenically unsaturated monomers,(c) crosslinkers,(d) initiators,(e) 0.1-20% by weight of at least one surfactant,(f) optionally at least one solubilizer and(g) optionally thickeners, foam stabilizers, polymerization regulators, fillers and/or cell nucleating agents,where the foaming takes place by dissolving a gas which is inert to free radicals under a pressure of 2-400 bar in the polymerizable aqueous mixture, and then decompressing the latter to atmospheric pressure, and(II) polymerizing the foamed mixture to form an expanded hydrogel and, where appropriate, adjusting the water content of the expanded polymer to 1-60% by weight, process for preparing the water-absorbing, expanded, crosslinked polymers and use of these polymers in sanitary articles employed for absorbing body fluids, in dressing material for covering wounds, as sealing material, as soil improver, as soil substitute and as packaging material.

    56.
    发明专利
    未知

    公开(公告)号：DE10047717A1

    公开(公告)日：2002-04-18

    申请号：DE10047717

    申请日：2000-09-27

    Applicant: BASF AG

    Inventor： HAEHNLE HANS-JOACHIM ,  BAUMGARTL HORST ,  BECK MARTIN ,  HERFERT NORBERT ,  MOHR BERNHARD ,  HUFF JUERGEN

    IPC: A61F13/53 ,  A61F13/00 ,  A61F13/02 ,  A61F13/15 ,  A61F13/49 ,  A61L15/26 ,  A61L15/42 ,  C08G12/32 ,  C08J9/14 ,  C08J9/36 ,  C08J9/22 ,  C08L61/32

    Abstract: Hydrophilic open-celled resilient foams containing melamine-formaldehyde resins, characterized by a droplet absorption rate of less than 5 seconds and an EU standard EN ISO 14184-1 formaldehyde emission of less than 100 mg of formaldehyde/kg of foam, and obtainable by(a) heating an aqueous solution or dispersion each containing at least a melamine-formaldehyde precondensate, an emulsifier, a blowing agent and a curing agent to form a foam and crosslink the precondensate,(b) then conditioning the foam at from 120 to 300° C. for from 1 to 180 minutes to remove volatiles, and(c) treating the foam during the conditioning or thereafter with at least one hydrophilicizer and/or with ozone, a corona discharge or a plasma,are useful in hygiene articles to acquire, distribute and immobilize body fluids.

    57.
    发明专利
    未知

    公开(公告)号：DE59705081D1

    公开(公告)日：2001-11-29

    申请号：DE59705081

    申请日：1997-02-27

    Applicant: BASF AG

    Inventor： HAEHNLE HANS-JOACHIM ,  WALTER MANFRED ,  TROPSCH JUERGEN ,  KREMESKOETTER JENS ,  SCHORNICK GUNNAR ,  ANSTOCK THOMAS

    IPC: A61F13/00 ,  A61F13/53 ,  A61L15/00 ,  A61L15/16 ,  A61L15/42 ,  A61L15/60 ,  C05G3/80 ,  C08F2/44 ,  C08F2/48 ,  C08F220/06 ,  C08J9/30 ,  C08L33/02

    Abstract: Water-absorbing foamlike crosslinked polymers which are obtainable by(I) foaming a polymerizable aqueous mixture which consists of(a) monoethylenically unsaturated monomers containing acid groups, which are at least 50 mol % neutralized,(b) with or without other monoethylenically unsaturated monomers,(c) crosslinker,(d) initiators,(e) from 0.1 to 20% by weight of at least one surfactant,(f) with or without one or more solubilizers and(g) with or without thickeners, foam stabilizers, polymerization regulators, fillers and/or cell nucleating agents,the foaming being performed by dispersing fine bubbles of a gas inert to free radicals, and(II) polymerizing the foamed mixture with formation of a foamed hydrogel, with or without adjusting the water content of the foamed polymer to from 1 to 60% by weight, processes for their preparation and their use in sanitary articles which are used for absorbing body fluids and in dressing materials for covering wounds are described.

    59.
    发明专利
    未知

    公开(公告)号：DE19909214A1

    公开(公告)日：2000-09-07

    申请号：DE19909214

    申请日：1999-03-03

    Applicant: BASF AG

    Inventor： HAEHNLE HANS-JOACHIM ,  SCHROEDER ULRICH ,  HEIDER WOLFGANG ,  SCHORNICK GUNNAR ,  ANSTOCK THOMAS

    IPC: A61L15/24 ,  A61L15/42 ,  A61L15/60 ,  B01J20/26 ,  C08J9/12 ,  C08J9/30 ,  C09K3/10 ,  C09K17/20 ,  C08J9/20 ,  C09K3/12 ,  C09K17/18 ,  A61F13/15

    Abstract: The invention relates to water-absorbing, cellular, cross-linked polymers which are obtained by the following steps: (I) expanding a polymerizable aqueous mixture which contains (a) monoethylenically unsaturated monomers that contain acidic groups and that are optionally neutralized, (b) optionally other monoethylenically unsaturated monomers, (c) cross-linking agents, (d) initiators, (e) 0.1 to 20 wt.-%. of at least one surfactant, (f) optionally at least one solubilizer and (g) optionally thickeners, foam stabilizers, polymerization controllers, fillers and/or nucleating agents. A gas that is inert vis-à-vis radicals is dissolved in the polymerizable aqueous mixture at a pressure of 2 to 400 bar to expand the mixture and the mixture is then relaxed to atmospheric pressure; (II) polymerizing the expanded mixture while forming a cellular hydrogel and optionally adjusting the water content of the cellular polymer to 1 to 60 wt.-%. The invention further relates to methods for producing water-absorbing, cellular, cross-linked polymers and to the use of said polymers in hygiene articles that are used for absorbing body fluids, in dressings for covering wounds, as sealing material, as soil conditioner, soil substitute and as packaging material.

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