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    PARTICULATE POLYMER AS FILTER AID
    2.
    发明专利
    PARTICULATE POLYMER AS FILTER AID 审中-公开

    公开(公告)号：JP2002331211A

    公开(公告)日：2002-11-19

    申请号：JP2002042979

    申请日：2002-02-20

    Applicant: BASF AG

    Inventor： GOMEZ MARCOS ,  ROCK TILMAN C ,  MEFFERT HELMUT ,  SANNER AXEL

    IPC: C12C7/24 ,  B01D37/02 ,  B01D39/02 ,  B01D39/16 ,  B01J20/26 ,  C08F212/02 ,  C08F220/04

    Abstract: PROBLEM TO BE SOLVED: To provide a filter aid used for filtering an aqueous liquid, having a good filtering action, and suited for precoat filtration. SOLUTION: A method for filtering an aqueous liquid is provided. The method is one comprising filtering the liquid in the presence of a filter aid, wherein the filter aid contains at least one water-insoluble, substantially nonswellable, particulate polymer of an ethylenically unsaturated monomer, and the polymer contains, in the form of a copolymer, at least 20 wt.%, based on the entire monomer weight, 3-6C α,β-monoethylenically unsaturated monocarboxylic acid.

    7.
    发明专利
    未知

    公开(公告)号：AT283874T

    公开(公告)日：2004-12-15

    申请号：AT00103887

    申请日：2000-02-24

    Applicant: BASF AG

    Inventor： MEFFERT HELMUT ,  ANGEL MAXIMILIAN

    IPC: A61K9/10 ,  A61K47/32 ,  C08F2/10 ,  C08F2/16 ,  C08F2/22 ,  C08F220/10 ,  C08F220/68 ,  C08F226/00 ,  C08F226/02 ,  C08F226/06 ,  C09D139/00

    Abstract: Aqueous copolymer dispersions are obtained by copolymerization of (A) hydrophilic N-vinyl monomers with a maximum polymerisation rate (MPR) above pH 7 and (B) hydrophobic mono-unsaturated monomers with an MPR below pH 7 in presence of radical starters and with the pH controlled to fall by 2-5 units from start to finish. A process for the production of aqueous copolymer dispersions by radical polymerisation in an aqueous medium containing 10-90 wt% hydrophilic monomer(s) (A) with an N-vinyl group, showing an MPR at pH values above 7, 10-90 wt% mono-unsaturated hydrophobic monomer(s) (B) showing an MPR at pH values below 7 and 0.01-20 wt% water-soluble and/or -insoluble radical starter(s). In this process the pH is controlled during polymerisation so that it decreases by 2-5 units between the beginning and end of the reaction. An Independent claim is also included for aqueous copolymer dispersions obtained by this process and copolymers obtained by drying the dispersions.

    9.
    发明专利
    未知

    公开(公告)号：BR0210992A

    公开(公告)日：2004-06-08

    申请号：BR0210992

    申请日：2002-05-31

    Applicant: BASF AG

    Inventor： GOTSCHE MICHAEL ,  GOMEZ MARCOS ,  SCHNEIDER TANJA ,  MEFFERT HELMUT ,  SCHNEIDER KARL-HEINRICH

    IPC: B65D65/46 ,  A01N25/10 ,  A01N25/12 ,  A01N35/10 ,  A01N47/20 ,  C08F8/12 ,  C08F283/06 ,  C08L51/00 ,  C08L51/08 ,  C09D151/00 ,  C09D151/08

    Abstract: The use of a water soluble water dispersible film forming graft polymerisate comprises: (a) vinyl esters of 1-24C carboxylic acids, in the presence of (b) polyethers of mean number average molecular wt. 300 (I), as coating agents, matrix builders,and/or packaging materials for agrochemicals. The use of a water soluble water dispersible film forming graft polymerisate comprises: (a) vinyl esters of 1-24C carboxylic acids, in the presence of (b) polyethers of mean number average molecular wt. 300 of formula (I), as coating agents, matrix builders,and/or packaging materials for agrochemicals. R = OH, amino, 1-24C alkoxy, R -COO, R -NH-COO-, polyalkoxy; R -R = (CH2)2, (CH2)3, (CH2)4, CH2CH(CH3), CH-2-CH(CH2-CH3), CH2-CHOR -CH2 R = H, amino-1-6 alkyl , 1-24 alkyl, R -CO, R -NH-CO; R = 1-24C alkyl; R = H, 1-24C alkyl, R -CO; A = COO, CO-B-COO, CONH-B-NH-COO; B = (CH2)t or optionally substituted arylene; n = 1; s = 0-500; t = 1-12; u = 1-5000; v = 0-5000; w = 0-5000; x = 1-5000; y = 0-5000; z = 0-5000; and provided that when R is polyalcohol, n is 1-8. An Independent claim is also included for agrochemical preparations in tablet form, containing a coating formulation of one or more agrochemical active agents as tab let cores with one or more graft polymerisates.

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