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15 条记录 (耗时 0.01 秒)

    POLYMER PRODUCT AND THE USE OF THE SAME AS DISPERSING AGENT
    7.
    发明授权
    POLYMER PRODUCT AND THE USE OF THE SAME AS DISPERSING AGENT 有权

    公开(公告)号：EP2723778B1

    公开(公告)日：2018-05-30

    申请号：EP12738480.8

    申请日：2012-06-15

    申请人： Kemira OYJ

    发明人： CARCELLER, Rosa ,  JUPPO, Ari ,  AKSELA, Reijo

    IPC分类号： C08F8/12

    CPC分类号： C08K3/20 ,  C08F8/12 ,  C08K3/22 ,  C08K3/26 ,  C08F218/18 ,  C08F222/06 ,  C08F226/02

    摘要： The invention relates to a polymer product obtained by polymerization of i) at least one monomer selected from N-vinylformamide and vinyl acetate, and ii) maleic anhydride to give a copolymer comprising N-vinylformamide and/or vinyl acetate and maleic anhydride followed by hydrolyzing formamide groups originating from N-vinylformamide to amino groups and/or acetate groups originating from vinyl acetate to hydroxyl groups and acid anhydride to dicarboxylic acid groups to give a water-soluble copolymer comprising amine and/or hydroxyl and carboxyl groups, wherein the molar ratio of the N-vinylformamide and/or vinyl acetate monomer to the maleic anhydride monomer is from 70:30 to 30:70. The polymer product can be used as a dispersing agent or as a scale inhibiting agent.

    PROCESS CHEMICAL FOR USE IN THE PRODUCTION OF PAPER OR BOARD
    10.
    发明公开
    PROCESS CHEMICAL FOR USE IN THE PRODUCTION OF PAPER OR BOARD 有权
    化工过程FOR USE IN纸或纸板生产

    公开(公告)号：EP2147152A1

    公开(公告)日：2010-01-27

    申请号：EP08761689.2

    申请日：2008-05-21

    申请人： Kemira OYJ

    发明人： CARCELLER, Rosa ,  JUPPO, Ari

    IPC分类号： D21H17/33 ,  D21H21/10

    CPC分类号： D21H21/10 ,  D21H17/33

    摘要： The invention relates to a process for producing paper or board from an aqueous fibre suspension, which process includes the step of adding a process chemical to the aqueous fibre suspension, said process chemical being a polymer obtained by controlled radical polymerization technique from an ethylepically unsaturated monomer, a chain transfer agent, and an initiator in a liquid medium or by controlled photopolymerization technique from an ethylenically unsaturated monomer and a photoiniferter in a liquid medium.The process chemical improves the runnability and productivity of the paper or board machine.