21.
    发明专利
    未知

    公开(公告)号:DK1651693T3

    公开(公告)日:2007-04-10

    申请号:DK04763311

    申请日:2004-07-17

    Applicant: BASF AG

    Abstract: An aqueous dispersion of water-soluble polymers obtained by free radical polymerization of ethylenically unsaturated anionic monomers in an aqueous medium in the presence of a stabilizer, wherein the stabilizer comprises: (a) at least one water-soluble polymer selected from the group consisting of a graft polymer of vinyl acetate and/or vinyl propionate on polyethylene glycol, a polyethylene glycol blocked at one or both terminal groups with an alkyl, a carboxyl or an amino group, and a copolymer of alkyl polyalkylene glycol methacrylate and methacrylic acid; and (b) at least one water-soluble polymer selected from the group consisting of a hydrolyzed copolymer of vinyl alkyl ether and maleic anhydride in the form of free carboxyl groups or in the form of salts at least partially neutralized with one or more alkali metal hydroxides or one or more ammonium bases, a cationically modified potato starch, an anionically modified potato starch, a degraded potato starch and maltodextrin.

    22.
    发明专利
    未知

    公开(公告)号:AT348848T

    公开(公告)日:2007-01-15

    申请号:AT04763311

    申请日:2004-07-17

    Applicant: BASF AG

    Abstract: An aqueous dispersion of water-soluble polymers obtained by free radical polymerization of ethylenically unsaturated anionic monomers in an aqueous medium in the presence of a stabilizer, wherein the stabilizer comprises: (a) at least one water-soluble polymer selected from the group consisting of a graft polymer of vinyl acetate and/or vinyl propionate on polyethylene glycol, a polyethylene glycol blocked at one or both terminal groups with an alkyl, a carboxyl or an amino group, and a copolymer of alkyl polyalkylene glycol methacrylate and methacrylic acid; and (b) at least one water-soluble polymer selected from the group consisting of a hydrolyzed copolymer of vinyl alkyl ether and maleic anhydride in the form of free carboxyl groups or in the form of salts at least partially neutralized with one or more alkali metal hydroxides or one or more ammonium bases, a cationically modified potato starch, an anionically modified potato starch, a degraded potato starch and maltodextrin.

    Production of paper, paperboard and cardboard comprises adding of polymer containing vinylamine units and an anionic polymer compound to a paper material, draining the paper material and drying the paper products

    公开(公告)号:DE102005029010A1

    公开(公告)日:2006-12-28

    申请号:DE102005029010

    申请日:2005-06-21

    Applicant: BASF AG

    Abstract: Production of paper, paperboard and cardboard comprises adding a polymer containing vinylamine units and an anionic polymer compound to a paper material, draining the paper material and drying the paper products; where the anionic polymer compound is a copolymer obtained by the copolymerization of N-vinylcarboxylic acid amide compound (a), monoethylenically unsaturated monomer (b) containing acid groups, optionally: other monoethylenically unsaturated monomer (c) and compounds (d) comprising at least two ethylenically unsaturated double bonds in the molecule. Production of paper, paperboard and cardboard comprises adding a polymer containing vinylamine units and an anionic polymer compound to a paper material, draining the paper material and drying the paper products; where the anionic polymer compound is a copolymer obtained by the copolymerization of N-vinylcarboxylic acid amide compound (I) of formula (CH 2=CH-N(-R 2>)(-CO-R 1>)), at least a monoethylenically unsaturated monomer (b) containing acid groups and/or its alkali metal, alkaline earth metal or ammonium salts, optionally other monoethylenically unsaturated monomer (c), and optionally compounds (d) comprising at least two ethylenically unsaturated double bonds in the molecule. R 1>, R 2>H or 1-6C alkyl.

    METHOD FOR PRODUCING PAPER, PAPERBOARD AND CARDBOARD

    公开(公告)号:CA2558277A1

    公开(公告)日:2005-09-29

    申请号:CA2558277

    申请日:2005-03-14

    Applicant: BASF AG

    Abstract: A process for the production of paper, board and cardboard by draining a paper stock containing interfering substances in the presence of polymers which contain vinylamine units and which have an average molar mass Mw of at least 1 million, a high-consistency stock first being prepared, at least one polymer containing vinylamine units and having an average molar mass Mw of at least 1 million and a degree of hydrolysis of from 1 to 20 mol % being metered into the high-consistency stock, the high-consistency stock being diluted to a low-consistency stock by adding water, and the low-consistency stock being drained, the polymers being hydrolyzed homo- or copolymers of N-vinylcarboxamides additives for reducing deposits in the wire part, press section and drying section of paper machines.

    AQUEOUS DISPERSIONS OF HYDROSOLUBLE POLYMERISATES OF ETHYLENICALLY UNSATURATED ANIONIC MONOMERS, METHOD FOR THE PRODUCTION AND USE THEREOF

    公开(公告)号:CA2532918A1

    公开(公告)日:2005-02-10

    申请号:CA2532918

    申请日:2004-07-17

    Applicant: BASF AG

    Abstract: The invention relates to aqueous dispersions of hydrosoluble polymerisates o f ethylenically unsaturated anionic monomers obtainable by monomer radical polymerisation in an aqueous medium in the presence of at least one type of stabiliser characterised in that the polymerisation is carried out in the presence of at least one type of hydrosoluble polymer of the following group s: (a) branched polymerisates of vinyl acetate and/or vinyl propionate on polyethylenglycol, polyethylenglycol closed on one or two sides, by terminal groups comprising alkyl, carboxyl or amino groups, copolymerisate of alkylpolyalkylenglycolacrylates or alkylpolyalkylenglycolmethacrylates and acrylic acid and/or methacrylic acid, polyalkylenglycols, polyethylenglycole closed on one or two sides, by terminal groups comprising alkyl, carboxyl or amino groups; and (b) hydrolysed copolymerisates of vinylalkylethers and maleic anhydride in the form of free carboxyl groups and in the form of salt s neutralised at least partially by alkali metal hydroxides or ammonium basses and/or a starch of a cationically modified potato starch group, cationically modified potato starch, degradable potato and maltodextrin starches which ar e used in the form of stabilisers. A method for producing said aqueous dispersions by monomer radical polymerisation in an aqueous medium in the presence of said hydrosoluble polymerisates of the groups (a) and (b) and th e use of said aqueous dispersions in the form of thickeners for aqueous system s are also disclosed.

    METHOD FOR PRODUCING PAPER, PAPERBOARD AND CARDBOARD

    公开(公告)号:CA2558277C

    公开(公告)日:2013-11-12

    申请号:CA2558277

    申请日:2005-03-14

    Applicant: BASF AG

    Abstract: The inventive method for producing paper, paperboard and cardboard by removing interfering substance-containing water from a paper pulp in the presence of polymers containing vinylamine units whose mean molecular mass Mw is equal or greater than one million. Said method consists in preparing, at first a high-density pulp, introducing a doses quantity at least of one type polymer which contains vinylamine units and whose mean molecular mass Mw is equal or greater than one million and a degree of hydrolysis ranges from 1 to 20 mol % in the high-density pulp, in diluting said high-density pulp by adding water until a low-density pulp is obtained and in dewatering said low-density pulp. Said invention also relates to the use of homo-or copolymers of N-vinyl carboxylic acid amides having a degree of hydrolysis ranging from 1 to 20 mol % and a mean molecular mass Mw equal or greater than one million for producing paper, paperboard and cardboard in the form of an additive to the high-density pulp containing interfering substances in order to reduce deposits formed in the sieving, pressing and drying areas of paper machines.

    30.
    发明专利
    未知

    公开(公告)号:DE502004002396D1

    公开(公告)日:2007-02-01

    申请号:DE502004002396

    申请日:2004-07-17

    Applicant: BASF AG

    Abstract: An aqueous dispersion of water-soluble polymers obtained by free radical polymerization of ethylenically unsaturated anionic monomers in an aqueous medium in the presence of a stabilizer, wherein the stabilizer comprises: (a) at least one water-soluble polymer selected from the group consisting of a graft polymer of vinyl acetate and/or vinyl propionate on polyethylene glycol, a polyethylene glycol blocked at one or both terminal groups with an alkyl, a carboxyl or an amino group, and a copolymer of alkyl polyalkylene glycol methacrylate and methacrylic acid; and (b) at least one water-soluble polymer selected from the group consisting of a hydrolyzed copolymer of vinyl alkyl ether and maleic anhydride in the form of free carboxyl groups or in the form of salts at least partially neutralized with one or more alkali metal hydroxides or one or more ammonium bases, a cationically modified potato starch, an anionically modified potato starch, a degraded potato starch and maltodextrin.

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