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    33.
    发明专利
    未知

    公开(公告)号：AT283872T

    公开(公告)日：2004-12-15

    申请号：AT99971821

    申请日：1999-10-30

    Applicant: BASF AG

    Inventor： NEGELE ANTON ,  GAUWEILER WERNER ,  MEIXNER HUBERT ,  MAHR NORBERT ,  RUEBENACKER MARTIN

    IPC: C09K23/52 ,  C08F2/22 ,  C08F8/12 ,  C08F26/02 ,  C08L39/00 ,  C08L101/12 ,  D21H17/37 ,  D21H17/45 ,  D21H21/10 ,  D21H21/18 ,  D21H21/20

    Abstract: Aqueous dispersions of water-soluble polymers of N-vinylcarboxamides contain, based on 100 parts of water, (A) from 5 to 80 parts by weight of water-soluble polymer containing N-vinylformamide units and/or N-vinylacetamide units and having particle sizes of from 50 nm to 2 mum and (B) from 1 to 50 parts by weight of at least one polymeric dispersant which is incompatible with the water-soluble polymers (A) in aqueous solution, which dispersions are prepared by polymerizing (A) from 5 to 80 parts by weight of N-vinylformamide and/or N-vinylacetamide, if desired together with other monoethylenically unsaturated monomers which form water-soluble polymers therewith, and (B) from 1 to 50 parts by weight of at least one polymeric dispersant which is incompatible with the polymers, formed from the monomers (A), in aqueous solution, in 100 parts by weight of water, at from 30 to 95° C. in the presence of from 0.001 to 5.0% by weight, based on the monomers used, and the aqueous dispersions of water-soluble polymers are used as drainage aids, flocculants and retention aids and as wet and dry strength agents and as fixing compositions in papermaking.

    34.
    发明专利
    未知

    公开(公告)号：AT204303T

    公开(公告)日：2001-09-15

    申请号：AT97922941

    申请日：1997-05-02

    Applicant: BASF AG

    Inventor： UTECHT JENS ,  NIESSNER MANFRED ,  MOENCH DIETMAR ,  RUEBENACKER MARTIN

    IPC: B01D21/01 ,  C02F1/56 ,  C08F8/00 ,  D21C9/18 ,  D21H17/46 ,  D21H21/10

    Abstract: PCT No. PCT/EP97/02251 Sec. 371 Date Jul. 1, 1998 Sec. 102(e) Date Jul. 1, 1998 PCT Filed May 2, 1997 PCT Pub. No. WO97/42229 PCT Pub. Date Nov. 13, 1997Polymers containing beta -hydroxyalkylvinylamine units, which are obtainable by reacting polymers containing vinylamine units with epoxides of the formula where R=C2-C28-alkyl, phenyl, C1-C18-alkylphenyl or C2-C18-alkenyl, are described, as are a process for preparing the polymers and use of the polymers as retention and drainage aids and flocculants and as fixatives in paper making, as protective colloid for producing alkyldiketene dispersions or alkenylsuccinic anhydride dispersions, as emulsifier for producing aqueous filler suspensions and as corrosion inhibitor.

    METHOD FOR PRODUCING HIGH DRY STRENGTH PAPER, PAPERBOARD OR CARDBOARD
    37.
    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.

    38.
    发明专利
    未知

    公开(公告)号：DE59911207D1

    公开(公告)日：2005-01-05

    申请号：DE59911207

    申请日：1999-10-30

    Applicant: BASF AG

    Inventor： NEGELE ANTON ,  GAUWEILER WERNER ,  MEIXNER HUBERT ,  MAHR NORBERT ,  RUEBENACKER MARTIN

    IPC: C08F2/22 ,  C08F8/12 ,  C08F26/02 ,  C08L39/00 ,  C08L101/12 ,  D21H17/37 ,  D21H17/45 ,  D21H21/10 ,  D21H21/18 ,  D21H21/20

    Abstract: Aqueous dispersions of water-soluble polymers of N-vinylcarboxamides contain, based on 100 parts of water, (A) from 5 to 80 parts by weight of water-soluble polymer containing N-vinylformamide units and/or N-vinylacetamide units and having particle sizes of from 50 nm to 2 mum and (B) from 1 to 50 parts by weight of at least one polymeric dispersant which is incompatible with the water-soluble polymers (A) in aqueous solution, which dispersions are prepared by polymerizing (A) from 5 to 80 parts by weight of N-vinylformamide and/or N-vinylacetamide, if desired together with other monoethylenically unsaturated monomers which form water-soluble polymers therewith, and (B) from 1 to 50 parts by weight of at least one polymeric dispersant which is incompatible with the polymers, formed from the monomers (A), in aqueous solution, in 100 parts by weight of water, at from 30 to 95° C. in the presence of from 0.001 to 5.0% by weight, based on the monomers used, and the aqueous dispersions of water-soluble polymers are used as drainage aids, flocculants and retention aids and as wet and dry strength agents and as fixing compositions in papermaking.

    39.
    发明专利
    未知

    公开(公告)号：DE59911014D1

    公开(公告)日：2004-12-09

    申请号：DE59911014

    申请日：1999-08-11

    Applicant: BASF AG

    Inventor： NIESSNER MANFRED ,  RUEBENACKER MARTIN ,  MAHR NORBERT

    IPC: C08F6/00

    Abstract: A process for the elimination of formamide from polymers containing N-vinylformamide units involves treating formamide-containing polymers with from 1 to 2 mol-equivalents of an acid or a base, based on 1 mol-equivalent of formamide, under reaction conditions such that the N-vinylformamide units in the polymer undergo virtually no hydrolysis.

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