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    MODIFICATION OF STARCH WITH CATIONIC POLYMERS AND USE OF MODIFIED STARCHES AS PAPER DRY STRENGTH ENHANCER
    32.
    发明专利
    MODIFICATION OF STARCH WITH CATIONIC POLYMERS AND USE OF MODIFIED STARCHES AS PAPER DRY STRENGTH ENHANCER 未知

    公开(公告)号：CA2367317A1

    公开(公告)日：2000-10-12

    申请号：CA2367317

    申请日：2000-03-23

    Applicant: BASF AG

    Inventor： DIEHL KURT ,  MAHR NORBERT ,  STANGE ANDREAS ,  LORENCAK PRIMOZ

    IPC: C08B31/00 ,  C08B31/18 ,  C08G81/00 ,  C08L3/00 ,  C08L3/02 ,  C08L3/04 ,  C08L3/10 ,  D21H17/28 ,  D21H17/29 ,  D21H17/44 ,  D21H17/45 ,  D21H21/10 ,  D21H21/18 ,  D21H21/20

    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 fro m the group consisting of polymers with molecular weights up to 1 million containing vinylamine units, polyethylene imines, polydiallyldimethylammoniu m chlorides, condensates of dimethylamine with epichlorohydrin or dichloroalkanes, condensates of dichloroethane and ammonia and mixtures of t he above mentioned compounds, and (b) polymer dehydrators for paper selected fr om 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 a nd paperboard.

    36.
    发明专利
    未知

    公开(公告)号：ES2119147T3

    公开(公告)日：1998-10-01

    申请号：ES94900150

    申请日：1993-11-16

    Applicant: BASF AG

    Inventor： SCHERR GUENTER ,  REUTHER WOLFGANG ,  LORENCAK PRIMOZ ,  MOENCH DIETMAR ,  LINHART FRIEDRICH ,  WEISER JUERGEN

    IPC: C08G69/48 ,  C08G18/32 ,  C08G18/60 ,  C08G59/14 ,  C08G73/00 ,  C08G73/02 ,  C08G73/04 ,  D21F1/66 ,  D21H11/14 ,  D21H17/46 ,  D21H17/54 ,  D21H17/56 ,  D21H21/10

    Abstract: PCT No. PCT/EP93/03205 Sec. 371 Date May 26, 1995 Sec. 102(e) Date May 26, 1995 PCT Filed Nov. 16, 1993 PCT Pub. No. WO94/12560 PCT Pub. Date Jun. 9, 1994.Condensates of polyalkylenepolyamines which are obtainable by (a) partial amidation of polyalkylenepolyamines and (b) condensation of the partially amidated polyalkylenepolyamines with bifunctional or polyfunctional crosslinking agents to give crosslinked polyalkylenepolyamines which, in 20% strength aqueous solution at 20 DEG C., have a viscosity of at least 100 mPa.s, processes for the preparation of the condensates of polyalkylenepolyamines by partial amidation of polyalkylenepolyamines with carboxylic acids, carboxylic esters, carboxylic anhydrides or carbonyl halides and crosslinking of the partially amidated polyalkylenepolyamines with bifunctional or polyfunctional crosslinking agents, from 0.001 to 10 parts by weight of a crosslinking agent being used per part by weight of the partially amidated polyalkylenepolyamines, and the use of the resulting condensates as drainage aids, flocculants, retention aids and fixing agents in papermaking.

    39.
    发明专利
    未知

    公开(公告)号：FI973393A0

    公开(公告)日：1997-08-19

    申请号：FI973393

    申请日：1997-08-19

    Applicant: BASF AG

    Inventor： ETTL RONALD ,  LORENCAK PRIMOZ ,  SCHERR GUENTER ,  REUTHER WOLFGANG ,  GLAS GUENTHER

    IPC: C08G73/04 ,  D21H17/34 ,  C09K23/52 ,  D21H17/03 ,  D21H17/17 ,  D21H17/56 ,  D21H21/16 ,  D21H

    Abstract: PCT No. PCT/EP96/00500 Sec. 371 Date Aug. 19, 1997 Sec. 102(e) Date Aug. 19, 1997 PCT Filed Feb. 7, 1996 PCT Pub. No. WO96/26318 PCT Pub. Date Aug. 29, 1997Aqueous alkyldiketene dispersions which contain a C14-C22-alkyldiketene and from 1 to 10% by weight of a polymeric protective colloid contain, as the protective colloid (a) copolymers of (1) N-vinylpyrrolidone and (2) at least one quaternized N-vinylimidazole or a substituted quaternized N-vinylimidazole as polymerized units in a molar ratio of from 80:20 to 5:95 and have a K value of at least 20 (according to H. Fikentscher in 0.5 M aqueous sodium chloride solution at a polymer concentration of 0.1% by weight and at 25 DEG C.) or (b) condensates which are obtainable by (1) partial amidation of polyethyleneimines with monocarboxylic acids and, if required (2) condensation of the partially amidated polyethyleneimines with at least bifunctional crosslinking agents which have a halohydrin, glycidyl, aziridine or isocyanate unit or a halogen atom as a functional group to give crosslinked, amidated polyethyleneimines which have a viscosity of at least 100 mPa.s in 20% strength by weight aqueous solution at 20 DEG C., or mixtures of (a) and (b) and are used as engine size in the production of paper, board and cardboard and for rendering cellulosic fibers water-repellent.

    40.
    发明专利
    未知

    公开(公告)号：DE19505751A1

    公开(公告)日：1996-08-22

    申请号：DE19505751

    申请日：1995-02-20

    Applicant: BASF AG

    Inventor： ETTL ROLAND ,  LORENCAK PRIMOZ ,  SCHERR GUENTER ,  REUTHER WOLFGANG ,  GLAS GUENTHER

    IPC: D21H17/34 ,  C08G73/04 ,  C09K23/52 ,  D21H17/03 ,  D21H17/17 ,  D21H17/56 ,  D21H21/16 ,  C08K5/15 ,  C08J3/03 ,  C08L79/02 ,  C08L39/04 ,  C08G59/14 ,  C08G65/32 ,  B01F17/52 ,  C08G18/64 ,  C08F226/06

    Abstract: The invention concerns aqueous alkyl diketene dispersions containing a C14-C22 alkyl diketene and 1-10 wt.% polymer-type protective colloid, and characterised by the fact that they contain as a protective colloid (a) copolymers of (1) N-vinylpyrrolidone and (2) at least one quaternised N-vinyl imidazole or a substituted quaternised N-vinyl imidazole, in a molar ratio of 80:20 - 5:95 and integrated by polymerisation, and have a K value of at least 20 (using the method of H. Fikentscher in 0.5 m aqueous cooking salt solution at a polymer concentration of 0.1 wt.% and a temperature of 25 DEG C); (b) condensation products obtained by (1) partial amidation of polyethylene imines with monocarboxylic acids and, optionally, (2) condensation of the partially amidated polyethylene imines with at least bifunctional cross-linking agents containing as a functional group a halo-hydrine, glycidyl, aziridine or isocyanate unit or halogen atom to produce cross-linked amidated polyethylene imines with a viscosity of at least 100 mPas in a 20 wt.% aqueous solution at 20 DEG C; or mixtures of (a) and (b). The invention also concerns the use of aqueous alkyl diketene dispersions as glue in the production of paper, pulp and cardboard and for the water-repellant finishing of cellulose fibres.

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