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    13.
    发明专利
    未知

    公开(公告)号：DE19839199A1

    公开(公告)日：2000-03-02

    申请号：DE19839199

    申请日：1998-08-28

    Applicant: BASF AG

    Inventor： HEIBEL CLAUDIA ,  BAUMSTARK ROLAND ,  DOBBELAAR JOHANNES

    IPC: C08F6/16 ,  C08F6/00 ,  C08F6/10

    Abstract: The invention relates to a method for reducing the quantity of residual monomers in aqueous polymeric dispersions by aftertreatment with an initiator system essentially comprising: a) 0.001 to 5 % by weight, in relation to the overall amount of monomers used for the production of the polymeric dispersion, of a1) an oxidant R OOH, wherein R represents hydrogen, a C1- to C8-alkyl group or a C6- to C12-aryl group and/or a2) a compound releasing hydrogen peroxide in an aqueous medium and b) 0.005 to 5 % by weight of a reducing agent, in relation to the overall amount of monomers used in the production of the polymeric dispersion, produced from b1) an aldehyde R CH=O, wherein R represents a C1- to C12-alkyl group, containing functional groups and/or may be olefinically unsaturated and b2) an inorganic dithionite and c) catalytic portions of a multivalent metal ion that can be present in several valence states.

    17.
    发明专利
    未知

    公开(公告)号：ES2158575T3

    公开(公告)日：2001-09-01

    申请号：ES97936671

    申请日：1997-07-29

    Applicant: BASF AG

    Inventor： SCHULER BERNHARD ,  AUCHTER GERHARD ,  TURK JOHANNES ,  NOORDIJK RIK ,  DOBBELAAR JOHANNES ,  BACHER REINHARD

    IPC: C08F220/12 ,  C09J7/04 ,  C09J133/06

    Abstract: A polymer which containsfrom 50 to 99.98% by weight of a C1-C12 alkyl (meth)acrylate a),from 0.02 to 10% by weight of a vinylaromatic compound b),from 0 to 10% by weight of an ethylenically unsaturated acid or of an ethylenically unsaturated acid anhydride c), andfrom 0 to 40% by weight of further monomers d), the percentages by weight being based on the polymer and the polymer being obtainable by polymerizing the monomers a) to d) in at least two stages which differ in their content of vinylaromatic compounds in such a way that the content of vinylaromatic compounds in the vinylaromatics-rich stage is at least 5 times as great as in the low-vinylaromatics stage.

    18.
    发明专利
    未知

    公开(公告)号：FR2784603B1

    公开(公告)日：2001-07-20

    申请号：FR9912565

    申请日：1999-10-08

    Applicant: BASF AG

    Inventor： DOBBELAAR JOHANNES ,  REHMER GERD ,  HUMMER WOLFGANG ,  BACHER REINHARD

    IPC: B01F15/00 ,  B01J4/00 ,  B08B7/00 ,  B08B9/08 ,  B01F15/02 ,  B01F1/00 ,  B01F3/12

    Abstract: A method of emptying vessels containing dispersions, solutions or suspensions of polymers in which during the emptying process the liquid medium also used to take up the polymers into the dispersion, solution or suspension is passed into the space within the vessel that is not filled by the solution, dispersion or suspension, wherein the liquid medium used to take up the polymers into the dispersion, solution or suspension is introduced in vapor form.

    Binder formulations based on aqueous polymer dispersions
    19.
    发明专利
    Binder formulations based on aqueous polymer dispersions 未知

    公开(公告)号：AU5349200A

    公开(公告)日：2001-02-22

    申请号：AU5349200

    申请日：2000-08-18

    Applicant: BASF AG

    Inventor： BAUMSTARK ROLAND ,  KIRSCH STEFAN ,  DERSCH ROLF ,  DOBBELAAR JOHANNES ,  MELAN MICHAEL

    IPC: C08L33/06 ,  C08F2/24 ,  C08F212/02 ,  C08F212/04 ,  C08F220/12 ,  C08K5/00 ,  C08L25/00 ,  C09D5/02 ,  C09D125/02 ,  C09D133/06 ,  E04C2/04 ,  C09D133/08 ,  C09D133/10 ,  C09D125/14 ,  C08L33/08 ,  C08L33/10 ,  C08L25/14

    Abstract: Binder preparation with a minimum film-forming temperature below 10 degrees C, based on a dispersion containing anionic and non-ionic emulsifiers and a copolymer of 20-50 wt% vinyl-aromatic monomer, 45-70 wt% 1-18C alkyl acrylate or 5-18C alkyl methacrylate which forms a homopolymer with a Tg below 10 degrees C, 2-4 wt% methacrylic acid and optionally other comonomers. A binder preparation with a minimum film-forming temperature (MFT) below 10 degrees C, based on a binder polymer (P) in the form of an aqueous dispersion containing anionic emulsifier(s) and non-ionic emulsifier(s), in which (P) is a copolymer of (A1) 20-50 wt% vinyl-aromatic monomer(s), (A2) 0-15 wt% 1-4C alkyl (meth)acrylate(s), (A3) 0-30 wt% (meth)acrylonitrile, (B) 45-70 wt% monomer(s) which form a homopolymer with a glass transition point (Tg) below 10 degrees C, selected from 1-18C alkyl acrylates and 5-18C alkyl methacrylates, (C) 2-4 wt% methacrylic acid, (D) 0-3 wt% monomer(s) selected from amides, 1-4C hydroxyalkyl esters and 1-4C alkyl-polyalkyleneoxide-esters of 3-6C mono-unsaturated monocarboxylic acids and (E) 0-5 wt% other monomer(s), where the total amount of monomers (A1)-(A3) does not exceed 55 wt% of the total monomer content and the content of (A2) is at least 5 wt% if the content of (A3) is less than 0.5 wt%. An Independent claim is also included for emulsion paint containing binder preparation(s) as described.

    20.
    发明专利
    未知

    公开(公告)号：BR9812464A

    公开(公告)日：2000-09-19

    申请号：BR9812464

    申请日：1998-09-17

    Applicant: BASF AG

    Inventor： RUPANER ROBERT ,  BAUER GERHARD ,  LAWRENZ SVEN ,  HEIBEL CLAUDIA ,  DOBBELAAR JOHANNES

    IPC: C08F6/00

    Abstract: A process is described for effectively reducing the residual monomer content of an aqueous polymer dispersion by aftertreatment at atmospheric pressure or above with an initiator system comprising a) a hydroperoxide, hydrogen peroxide or a peracid, and b) an alpha-hydroxy carboxylic acid, such as tartaric acid, or with a salt thereof.

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