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    A three-step process and a device useful for preparation of polymer dispersions with a conveyor unit for conveying media liable to coagulation such as dispersions for the preparation of homo- and copolymers by emulsion polymerization
    21.
    发明专利
    A three-step process and a device useful for preparation of polymer dispersions with a conveyor unit for conveying media liable to coagulation such as dispersions for the preparation of homo- and copolymers by emulsion polymerization 未知

    公开(公告)号：DE10134023A1

    公开(公告)日：2003-01-23

    申请号：DE10134023

    申请日：2001-07-12

    Applicant: BASF AG

    Inventor： FUNKHAUSER STEFFEN ,  RICHTER FRAUKE ,  KASTENHUBER WALTER ,  LAPPE ANDREAS ,  KESLER JOCHEN ,  HUEMMER WOLFGANG ,  WILDBURG GERALD

    IPC: C08F2/01 ,  C08F2/08 ,  C08F2/22 ,  C08F291/00

    Abstract: A 3-step process for preparation of polymer dispersions from monomers by emulsion polymerization involves: (a) addition (sic) of water as inert solvent and dispersion agent; (b) addition of initiator; and (c) addition of part or the whole amount of monomers directly or as an emulsion in the presence of further water and emulsion polymerization at 40-120 deg C is new. A process for preparation of polymer dispersions from monomers from alkyl (meth)acrylates, 1-20C vinyl esters of carboxylic acids, vinylaromatic compounds, nitriles, vinyl halogens, vinylether, 2-8C hydrocarbon with one or two double bonds, or OH group containing monomers by emulsion polymerization at least at 40 deg C in the presence of a radical polymerization initiator. At least 85% of the polymer obtained from one or more of these monomers is prepared in the three steps: (a) addition (sic) of water as inert solvent and dispersion agent; (b) addition of initiator; and (c) addition of part or the whole amount of monomers directly or as an emulsion in the presence of further water and optionally dispersing agent, and emulsion polymerization at 40-120 deg C. Steps (a) to (c) can be individual steps or can be part of a gradient process, and in the individual or all the stages the reaction medium dispersion is fed to the polymerization vessel (2) through an external circuit (10), which has one or more low shear cylinders or membrane pumps (7) and at least one heat exchanger (8) of essentially laminar streaming profile. An Independent claim is included for the apparatus for storage and addition of the reaction and adjuvant materials, a reaction vessel (2), a heating/cooling jacket (3), a device (6) for discharging the vessel (2), an external circuit (10), with one or more low shear supply cylinders or membrane pumps, at least one heat exchanger (8) with a laminar or turbulent profile ,and connecting pipes (20).

    24.
    发明专利
    未知

    公开(公告)号：AT366759T

    公开(公告)日：2007-08-15

    申请号：AT03755108

    申请日：2003-05-21

    Applicant: BASF AG

    Inventor： WULFF DIRK ,  FELDTHUSEN JENSEN JESPER ,  AUCHTER GERHARD ,  WILDBURG GERALD ,  FINK RALF

    IPC: C08F285/00 ,  C08F2/22 ,  C08F257/02 ,  C08F265/04 ,  C08F291/00 ,  C08L51/00 ,  C09J151/00

    Abstract: The invention relates to a method for producing an aqueous polymer dispersion having a polymer solids content of >=50% by weight by carrying out the radically initiated aqueous emulsion polymerization of ethylenically unsaturated compounds (monomers). The inventive method is characterized in that: a) a mixture is provided in a polymerization vessel and contains a partial quantity 1 consisting of: deionized water, 0.001 to 0.5 parts by weight of a polymer with a weighted average particle diameter of =80% [polymerization step A], and; b) afterwards, a monomer emulsion containing partial quantity 2, which consists of deionized water, 0.1 to 5 parts by weight of dispersants and 90 to 99.5 parts by weight of monomers, is fed under polymerization conditions to the obtained reaction mixture [polymerization step B], whereby; c) the total amount of the monomers used for the polymerization is equal to 100 parts by weight, and the total amount of deionized water is

    25.
    发明专利
    未知

    公开(公告)号：DE10223615A1

    公开(公告)日：2003-12-11

    申请号：DE10223615

    申请日：2002-05-27

    Applicant: BASF AG

    Inventor： WULFF DIRK ,  FELDTHUSEN JENSEN JESPER ,  AUCHTER GERHARD ,  WILDBURG GERALD ,  FINK RALF

    IPC: C08F2/22 ,  C08F257/02 ,  C08F265/04 ,  C08F285/00 ,  C08F291/00 ,  C08L51/00 ,  C09J151/00 ,  C08F220/18 ,  C08F212/08 ,  C08F236/06 ,  C08F214/04 ,  C08F210/02 ,  C08F218/04 ,  C04B24/26 ,  C09D5/02 ,  C09D5/12 ,  C09J133/10

    Abstract: The invention relates to a method for producing an aqueous polymer dispersion having a polymer solids content of >=50% by weight by carrying out the radically initiated aqueous emulsion polymerization of ethylenically unsaturated compounds (monomers). The inventive method is characterized in that: a) a mixture is provided in a polymerization vessel and contains a partial quantity 1 consisting of: deionized water, 0.001 to 0.5 parts by weight of a polymer with a weighted average particle diameter of =80% [polymerization step A], and; b) afterwards, a monomer emulsion containing partial quantity 2, which consists of deionized water, 0.1 to 5 parts by weight of dispersants and 90 to 99.5 parts by weight of monomers, is fed under polymerization conditions to the obtained reaction mixture [polymerization step B], whereby; c) the total amount of the monomers used for the polymerization is equal to 100 parts by weight, and the total amount of deionized water is

    Aqueous polymer dispersion useful as binder particularly for high gloss paints, prepared by reacting two monomer mixtures combined at controlled feed rates
    27.
    发明专利
    Aqueous polymer dispersion useful as binder particularly for high gloss paints, prepared by reacting two monomer mixtures combined at controlled feed rates 未知

    公开(公告)号：DE10041680A1

    公开(公告)日：2002-03-07

    申请号：DE10041680

    申请日：2000-08-24

    Applicant: BASF AG

    Inventor： PORZIO ROBERT SHANE ,  MELAN MICHAEL ,  WILDBURG GERALD

    IPC: C08F2/22 ,  C09D5/02 ,  C09D133/20

    Abstract: Aqueous polymer dispersion (A) prepared by radical-initiated aqueous emulsion polymerization of monomer mixtures (M1, M2) added according to a specific feed procedure. Polymerization is performed in a vessel fed with a monomer stream (m) formed from partial streams, m1 and/or m2, of M1 and M2, respectively, and during the process the proportion of m2 in m increases. At the start of feeding, m comprises at least 90wt.% M1 but at the end it contains at least 90wt.% M2. When used alone, M1 produces a polymer of glass transition temp (Tg1) not over 50 deg C while M2, alone, produces a polymer with similar temperature (Tg2) over 50 deg C, with at least a 10 deg C difference between Tg1 and Tg2. The ratio of total amounts of M1 and M2 is 20:80 to 60:40. An Independent claim is also included for a method of producing (A).

    28.
    发明专利
    未知

    公开(公告)号：DE19830555A1

    公开(公告)日：2000-01-13

    申请号：DE19830555

    申请日：1998-07-08

    Applicant: BASF AG

    Inventor： ZHAO CHENG-LI ,  WISTUBA ECKEHARDT ,  BAUMSTARK ROLAND ,  WILDBURG GERALD

    IPC: C08J7/04 ,  C09D133/08 ,  C08L33/08 ,  C08L75/00

    Abstract: Aqueous preparations containing: (i) a film-forming copolymer with monomer units derived from ureas, thioureas or imidazolidin-2-ones with unsaturated substituents; and (ii) a compound with 2 or more aldehyde groups are used for coating polyurethane (PU)-based substrates. The use of aqueous preparations for coating PU-based substrates is claimed. These preparations contain: (i) dispersed film-forming polymer(s) (A) derived from unsaturated monomers (M) comprising monomer(s) (M1) of formula (I) and comonomer(s) (M2); and (ii) compound(s) (B) with two or more aldehyde groups, in which: R , R = H or 1-5C alkyl, or R + R may form a 2-4C alkylene group, optionally substituted with 1 or 2 1-5C alkyl, 1-4C alkoxy and/or hydroxyl groups; X = oxygen or sulfur; R = a 2-20C mono-unsaturated residue. Independent claims are also included for: (a) a process for coating water-repellent PU-based substrates by applying these preparations to the substrate; (b) aqueous preparations containing 10-50 wt.% polymer (A), 0.05-5 wt.% compound(s) (B) (based on A), 10-70 wt.% inorganic fillers and/or pigments, 0.1-20 wt.% conventional additives etc. and water to 100 wt.%, in which (A) is a copolymer of 70-95 wt% n-butyl and/or 2-ethylhexyl acrylate, 5-25 wt.% styrene, methyl methacrylate and/or tert.-butyl methacrylate, 0.1-5 wt.% monomer(s) M1 and 0.1-5 wt.% monomer(s) M3.

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