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    2.
    发明专利
    未知

    公开(公告)号：FI56225C

    公开(公告)日：1979-12-10

    申请号：FI152473

    申请日：1973-05-11

    Applicant: BASF AG

    Inventor： MUENSTER ALFRED ,  SRNA CHRISTIAN ,  ROHMANN MICHAEL

    IPC: C08F20/06 ,  C09K23/52 ,  D21H19/58 ,  D21H1/22 ,  D21H3/38

    Abstract: 1423259 Coating compositions BADISCHE ANILIN- & SODA-FABRIK AG 24 May 1973 [25 May 1972] 24804/73 Heading C3P A paper coating composition comprises a binder, pigment and as dispersing agent a polymer prepared by polymerizing acrylic acid in the presence of isopropanol and neutralizing the resulting polymer. The composition may also contain antifoaming agents, lubricants, optical brighteners and dyes. In examples, the polyacrylate was prepared by polymerization in aqueous isopropanol using hydrogen peroxide as initiator followed by neutralization with caustic soda. This product was mixed with kaolin or satin white pigment, starch solution, and a styrene/butyl acrylate polymer dispersion to give a coating composition.

    Production of water-soluble polymers in solid form
    7.
    发明专利
    Production of water-soluble polymers in solid form 未知

    公开(公告)号：GB1114161A

    公开(公告)日：1968-05-15

    申请号：GB3765565

    申请日：1965-09-03

    Applicant: BASF AG

    Inventor： SPOOR HERBERT ,  POHLEMANN HEINZ ,  HEIL EDUARD ,  MUENSTER ALFRED ,  PFAFF PETER

    IPC: C08J3/14

    Abstract: A process for recovering water-soluble polymers in solid form from their highly viscous aqueous solutions comprises breaking up an aqueous solution of the polymer having a viscosity of at least 105 centipoises into small particles, introducing the latter into an organic liquid, which is substantially water-immiscible, to form a suspension of the polymer in the organic liquid, dehydrating the suspension by azeotropic distillation, and separating the suspended polymer particles from the organic liquid. Suitable organic liquids include heptane, carbon tetrachloride, tetrachloroethylene, amyl acetate, dibutyl ether, benzene, toluene, xylene and mixtures thereof. Suitable polymers include those of acrylamide, methacrylamide, acrylic acid, methacrylic acid, N-vinyl pyrrolidone, vinyl sulphonic acid, styrene sulphonic acid and N-vinyl imidazole, which compounds may possibly be copolymerized with, for example, acrylonitrile, methyl acrylate, vinyl acetate, vinyl chloride and, also, small amounts of crosslinking monomers. An example illustrates the recovery of an acrylamide/ammonium acrylate copolymer prepared by polymerizing the corresponding monomers in aqueous solution using an ammonium persulphate / sodium formaldehyde sulphoxylate catalyst.

    MANUFACTURE OF POLYMERS OF ACRYLIC ACID OR METHACRYLIC ACID
    9.
    发明专利
    MANUFACTURE OF POLYMERS OF ACRYLIC ACID OR METHACRYLIC ACID 未知

    公开(公告)号：CA1121946A

    公开(公告)日：1982-04-13

    申请号：CA316779

    申请日：1978-11-23

    Applicant: BASF AG

    Inventor： MUENSTER ALFRED ,  ROHMANN MICHAEL

    IPC: C08F2/06 ,  C08F20/06

    Abstract: An improved process for the production of polymers of acrylic acid or methacrylic acid by polymerizing acrylic acid or methacrylic acid in isopropanol or in a water-isopro-panol mixture containing at least 40% by weight of isopropanol in the presence of polymerization initiators at a temperature of from 120 to 200.degree.C under pressure. The polymers obtained are used as dispersing agents for inorganic pigments.

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