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137 records (took 0.024 seconds)

    122.
    发明专利
    未知

    公开(公告)号：DK407888A

    公开(公告)日：1989-01-26

    申请号：DK407888

    申请日：1988-07-21

    Applicant: BASF AG

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

    IPC: D21H17/34 ,  D21H17/28 ,  D21H17/45 ,  D21H21/18 ,  D21H3/28 ,  D21H3/36

    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.

    124.
    发明专利
    未知

    公开(公告)号：FI883504A0

    公开(公告)日：1988-07-25

    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 ,  D21H

    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.

    128.
    发明专利
    未知

    公开(公告)号：DE3508704A1

    公开(公告)日：1986-09-18

    申请号：DE3508704

    申请日：1985-03-12

    Applicant: BASF AG

    Inventor： HIRSCH GUENTER DR ,  AUHORN WERNER

    IPC: C08F220/00 ,  C08F220/04 ,  C08F220/10 ,  C08F220/12 ,  C09K23/00 ,  D21H17/37 ,  D21H17/67 ,  D21H17/69 ,  D21H3/60

    Abstract: Aqueous pigment suspensions which are added to the stock suspension during papermaking and contain, as a dispersant, from 0.1 to 2% by weight, based on the pigment, of a copolymer which contains, as copolymerized units, (a) from 40 to 95% by weight of an ester of (meth)acrylic acid with a saturated monohydric C1-C8-alcohol or with a saturated dihydric C2-C4-alcohol and (b) from 60 to 5% by weight of an ethylenically unsaturated C3-C5-carboxylic acid and has a K value of from 10 to 65 (determined according to H. Fikentscher in 1% aqueous solution in the form of the ammonium salt at pH 9 and at 20 DEG C.), their preparation and their use.

    129.
    发明专利
    未知

    公开(公告)号：DK110486A

    公开(公告)日：1986-09-13

    申请号：DK110486

    申请日：1986-03-11

    Applicant: BASF AG

    Inventor： HIRSCH GUENTER ,  AUHORN WERNER

    IPC: C08F220/00 ,  C08F220/04 ,  C08F220/10 ,  C08F220/12 ,  C09K23/00 ,  D21H17/37 ,  D21H17/67 ,  D21H17/69 ,  D21H

    Abstract: Aqueous pigment suspensions which are added to the stock suspension during papermaking and contain, as a dispersant, from 0.1 to 2% by weight, based on the pigment, of a copolymer which contains, as copolymerized units, (a) from 40 to 95% by weight of an ester of (meth)acrylic acid with a saturated monohydric C1-C8-alcohol or with a saturated dihydric C2-C4-alcohol and (b) from 60 to 5% by weight of an ethylenically unsaturated C3-C5-carboxylic acid and has a K value of from 10 to 65 (determined according to H. Fikentscher in 1% aqueous solution in the form of the ammonium salt at pH 9 and at 20 DEG C.), their preparation and their use.

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