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    AQUEOUS POLYMER DISPERSION OBTAINABLE BY FREE-RADICALLY INITIATED EMULSION POLYMERIZATION IN THE PRESENCE OF LIGNOSULFONATE
    1.
    发明专利
    AQUEOUS POLYMER DISPERSION OBTAINABLE BY FREE-RADICALLY INITIATED EMULSION POLYMERIZATION IN THE PRESENCE OF LIGNOSULFONATE 未知

    公开(公告)号：CA2864370A1

    公开(公告)日：2013-08-22

    申请号：CA2864370

    申请日：2013-02-11

    Applicant: BASF SE

    Inventor： AL-HELLANI RABIE ,  CIMPEANU CARMEN-ELENA ,  SCHMIDT-THUMMES JURGEN ,  LAWRENZ DIRK ,  GEORGIEVA KRISTINA ,  SONG ANJA

    IPC: C08F2/22 ,  C08F2/44

    Abstract: Described is an aqueous polymer dispersion comprising a chain growth addition polymer obtainable via free-radically initiated emulsion polymerization from ethylenically unsaturated, free-radically polymerizable monomers, wherein the chain growth addition polymer is formed to an extent of not less than 60 wt% from primary monomers selected from vinylaromatic compounds, conjugated aliphatic dienes, vinyl esters of saturated C1- to C20-carboxylic acids, esters of acrylic acid or of methacrylic acid with monohydric C1- to C20-alcohols, aliphatic hydrocarbons having 2 to 8 carbon atoms and one or two double bonds, or mixtures thereof, wherein the monomers are polymerized in the presence of lignosulfonate and wherein the chain growth addition polymer is branched or crosslinked. Also described is a process for preparing the aqueous polymer dispersion. The polymer dispersion is useful for preparing paper coating compositions.

    AQUEOUS POLYMER DISPERSIONS BASED ON COPOLYMERS FORMED FROM VINYLAROMATICS AND CONJUGATED ALIPHATIC DIENES, PROCESSES FOR PREPARATION THEREOF AND USE THEREOF
    2.
    发明专利
    AQUEOUS POLYMER DISPERSIONS BASED ON COPOLYMERS FORMED FROM VINYLAROMATICS AND CONJUGATED ALIPHATIC DIENES, PROCESSES FOR PREPARATION THEREOF AND USE THEREOF 未知

    公开(公告)号：CA2700059C

    公开(公告)日：2015-01-20

    申请号：CA2700059

    申请日：2008-10-06

    Applicant: BASF SE

    Inventor： EVSTATIEVA ELITSA ,  SCHMIDT-THUMMES JURGEN ,  LAWRENZ DIRK ,  MINDERHOUD JOHANNES JAN-BESSEL ,  ARENS GUILLERMO

    IPC: C08F251/02 ,  C08F2/22 ,  C08L25/10 ,  C08L51/02 ,  C09D151/02 ,  D21H19/54 ,  D21H19/58 ,  D21H21/16

    Abstract: Aqueous polymer dispersions based on copolymers formed from vinyl-aromatics and conjugated aliphatic dienes having a mean particle size of from 80 to 150 nm are obtainable by free-radically initiated emulsion copolymerization of (a) from 19.9 to 80 parts by weight of at least one vinylaromatic compound, (b) from 19.9 to 80 parts by weight of at least one conjugated aliphatic diene, (c) from 0.1 to 10 parts by weight of at least one ethylenically unsaturated acid and (d) from 0 to 20 parts by weight of at least one other monoethylenically unsaturated monomer, where the sum of the parts by weight of monomers (a), (b), (c) and (d) is always 100, in an aqueous medium in the presence of at least one degraded starch with an intrinsic viscosity .eta. of less than 0.07 dl/g, using at least 0.9% by weight, based on all of the monomers used, of initiators selected from peroxodisulphates, peroxosulphates, azo initiators, organic peroxides, organic hydroperoxides and hydrogen peroxide, wherein at least 30% by weight of the initiators are initially charged in the aqueous medium together with the degraded starch and the monomers and the remaining initiators are metered into this initial charge under polymerization conditions. Processes for preparing this dispersion by emulsion polymerization of the monomers (a), (b), (c) and optionally (d) in the presence of a degraded starch with an intrinsic viscosity .eta. of less than 0.07 dl/g, where a portion of the initiator is initially charged together with the aqueous solution of the degraded starch in the reactor, and the remaining initiator and the monomers are metered in under polymerization conditions, and the use of the aqueous polymer dispersions as binders, adhesives, sizes for fibres or for producing coatings.

    AQUEOUS POLYMER DISPERSIONS BASED ON COPOLYMERS FORMED FROM VINYLAROMATICS AND CONJUGATED ALIPHATIC DIENES, PROCESSES FOR PREPARATION THEREOF AND USE THEREOF
    8.
    发明专利
    AQUEOUS POLYMER DISPERSIONS BASED ON COPOLYMERS FORMED FROM VINYLAROMATICS AND CONJUGATED ALIPHATIC DIENES, PROCESSES FOR PREPARATION THEREOF AND USE THEREOF 未知

    公开(公告)号：CA2700059A1

    公开(公告)日：2009-04-16

    申请号：CA2700059

    申请日：2008-10-06

    Applicant: BASF SE

    Inventor： EVSTATIEVA ELITSA ,  SCHMIDT-THUMMES JURGEN ,  LAWRENZ DIRK ,  MINDERHOUD JOHANNES JAN-BESSEL ,  ARENS GUILLERMO

    IPC: C08F251/02 ,  C08F2/22 ,  C08L25/10 ,  C08L51/02 ,  C09D151/02 ,  D21H19/54 ,  D21H19/58 ,  D21H21/16

    Abstract: Aqueous polymer dispersions based on copolymers formed from vinyl-aromatics and conjugated aliphatic dienes having a mean particle size of from 80 to 150 nm are obtainable by free-radically initiated emulsion copolymerization of (a) from 19.9 to 80 parts by weight of at least one vinylaromatic compound, (b) from 19.9 to 80 parts by weight of at least one conjugated aliphatic diene, (c) from 0.1 to 10 parts by weight of at least one ethylenically unsaturated acid and (d) from 0 to 20 parts by weight of at least one other monoethylenically unsaturated monomer, where the sum of the parts by weight of monomers (a), (b), (c) and (d) is always 100, in an aqueous medium in the presence of at least one degraded starch with an intrinsic viscosity ? of less than 0.07 dl/g, using at least 0.9% by weight, based on all of the monomers used, of initiators selected from peroxodisulphates, peroxosulphates, azo initiators, organic peroxides, organic hydroperoxides and hydrogen peroxide, wherein at least 30% by weight of the initiators are initially charged in the aqueous medium together with the degraded starch and the monomers and the remaining initiators are metered into this initial charge under polymerization conditions. Processes for preparing this dispersion by emulsion polymerization of the monomers (a), (b), (c) and optionally (d) in the presence of a degraded starch with an intrinsic viscosity ? of less than 0.07 dl/g, where a portion of the initiator is initially charged together with the aqueous solution of the degraded starch in the reactor, and the remaining initiator and the monomers are metered in under polymerization conditions, and the use of the aqueous polymer dispersions as binders, adhesives, sizes for fibres or for producing coatings.

    PAPER COATING COMPOSITIONS COMPRISING A POLYMER DISPERSION FROM ROOM TEMPERATURE LIQUID AND GASEOUS MONOMERS
    10.
    发明专利
    PAPER COATING COMPOSITIONS COMPRISING A POLYMER DISPERSION FROM ROOM TEMPERATURE LIQUID AND GASEOUS MONOMERS 未知

    公开(公告)号：CA2854354A1

    公开(公告)日：2013-05-02

    申请号：CA2854354

    申请日：2012-10-26

    Applicant: BASF SE

    Inventor： LAWRENZ DIRK ,  SCHMIDT-THUMMES JURGEN ,  VELING NICO

    IPC: D21H21/16 ,  C08L25/10 ,  D21H19/58

    Abstract: Paper coating compositions comprise inorganic pigments and an aqueous polymeric dispersion comprising dispersed polymeric particles. The polymers are obtainable by polymerization of a first monomer that is liquid at room temperature, has a boiling point of at least 50°C and a glass transition temperature of at least 20°C as homopolymer, and a second monomer that is gaseous at room temperature, has a boiling point of below 0°C and a glass transition temperature of below -30°C as homopolymer. The dispersed polymeric particles have an average size of below 150 nm and a glass transition temperature in the range from -10 to +30°C.

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