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    Preparation of coarse particle polymer dispersion
    33.
    发明专利
    Preparation of coarse particle polymer dispersion 未知

    公开(公告)号：DE19751332A1

    公开(公告)日：1999-05-20

    申请号：DE19751332

    申请日：1997-11-19

    Applicant: BASF AG

    Inventor： CLAASSEN PETER ,  BLATZ GERHARD

    IPC: C08C1/07 ,  C08F2/22 ,  C08F236/04 ,  C08L31/02 ,  C08L33/04 ,  C08L33/18 ,  C08L71/02 ,  C08J9/16

    Abstract: Agglomeration of fine particle polymer dispersions by a combination of chemical and pressure agglomeration. Coarse particle polymer dispersions (Pg) are produced by polymerizing a mixture (M) comprising at least one conjugated diene monomer (A) and at least one ethylenically unsaturated comonomer (B), by radical aqueous emulsion polymerization in the presence of an emulsifier (E) and optionally further adjuvants, to form a fine particle dispersion (Pf), and agglomerating the fine particle dispersion (Pf) to a coarse particle polymer dispersion (Pg) by a combination of chemical agglomeration and pressure agglomeration. Independent claims are also included for the following: (a) use of coarse particle polymer dispersions (Pg) for the production of latex foams; (b) process for producing latex foams by compounding, foaming and crosslinking dispersions (Pg); and (c) latex foams made from the dispersions (Pg).

    35.
    发明专利
    未知

    公开(公告)号：DE19707746A1

    公开(公告)日：1998-08-27

    申请号：DE19707746

    申请日：1997-02-26

    Applicant: BASF AG

    Inventor： PAKUSCH JOACHIM DR ,  ANGEL MAXIMILIAN DR ,  CLAASSEN PETER ,  DRAGON ANDREE

    IPC: C04B24/24 ,  C04B24/26 ,  C08F2/22 ,  C08J3/16 ,  C08L101/00 ,  C08L33/02 ,  C08L33/10 ,  C09J133/02 ,  C09J133/10 ,  C08J3/03 ,  C09D133/02 ,  C09D133/14

    Abstract: The use of copolymers (I) or their salts as drying aids for aqueous dispersions of polymers (II) is claimed. (I) comprise (A) 20-95 mole % 3-6C ethylenically unsaturated carboxylic acid(s), (B) 5-80 mole % hydroxyalkyl ester(s) of 3-6C ethylenically unsaturated carboxylic acid(s) and (C) ≤ 10 mole % other monomers. Also claimed are (i) a method of producing polymer powder by drying aqueous (II) dispersions in the presence of (I); (ii) the polymer powder obtained in this way; (iii) dry mineral building material formulations containing this powder; and (iv) aqueous polymer dispersions obtained by free radical aqueous emulsion polymerisation in the presence of (I).

    36.
    发明专利
    未知

    公开(公告)号：BR9605842A

    公开(公告)日：1998-08-25

    申请号：BR9605842

    申请日：1996-12-04

    Applicant: BASF AG

    Inventor： CLAASSEN PETER ,  HORMUTH WOLFGANG ALOIS ,  GRAALMANN ONNO ,  VISSEREN MARINUS

    IPC: C08F2/22 ,  C08F2/24 ,  C08F36/04 ,  C08F236/04 ,  C08F279/04

    Abstract: Process for preparing an aqueous polymer dispersion by radical aqueous emulsion polymerisation of a mixture of monomers having at least one ethylenically unsaturated group, the mixture containing at least 30 wt. % in total mixture of monomers (A) containing two conjugated ethylenically unsaturated double bonds, comprises (a) dividing the monomer mixture into n portions, where n is at least 2; (b) introducing the first monomer portion into the polymerisation reactor together with dispersing agent, radical polymerisation initiator and aqueous dispersing medium and polymerising in a first stage commencing at a polymerisation starting temperature TP1 of 0 degrees C ≤ TP1 ≤ 50 degrees C such that the temperature of the polymerisation mixture rises by at least 20 degrees C to a highest value of TP1H without exceeding 80 degrees C, and then holding the temperature constant within the range TP1H to TP1H-10 degrees C until the conversion U1 of monomer to polymer is at least 60 but at most 90 mol %, after which the polymerisation mixture is cooled to a polymerisation starting temperature TP2 where TP2 = TP1 plus or minus 10 degrees C and 0 degrees C ≤ TP2 ≤ 50 degrees C; (c) adding the second monomer portion and polymerising the monomer mixture present in the reactor in the presence of the polymer already formed, the dispersing agent and the polymerisation initiator in a second polymerisation stage commencing at the polymerisation starting temperature TP2 such that the temperature of the polymerisation mixture rises by at least 20 degrees C to a highest value of TP2H without exceeding 80 degrees C, and then holding the temperature constant within the range TP2H to TP2H-10 degrees C until the conversion U2 of monomer to polymer is at least 60 but at most 90 mol %, after which the polymerisation mixture is cooled to a polymerisation starting temperature TP3 where TP3 = TP1 plus or minus 10 degrees C and 0 degrees C ≤ TP3 ≤ 50 degrees C; (d) adding and polymerising the remaining n-2 portions of the monomer mixture successively in the same way as the second portion and (e) after the nth polymerisation stage, optionally continuing the polymerisation at a temperature of 0-50 degrees C to a total conversion Utot of monomers introduced to polymer of at least 95mol. %.

    Water-based polymer dispersions
    37.
    发明专利
    Water-based polymer dispersions 未知

    公开(公告)号：DE19548313A1

    公开(公告)日：1997-06-26

    申请号：DE19548313

    申请日：1995-12-22

    Applicant: BASF AG

    Inventor： BALK ROELOF DR ,  CLAASSEN PETER ,  GRAALMANN ONNO DR ,  VISSEREN MARINUS

    IPC: C08F2/08 ,  C08F2/22 ,  C08F4/40 ,  C08F236/04 ,  C08K3/22 ,  C08L9/10

    Abstract: In a water-based polymer dispersion of a polymer consisting of (a) at least 50 wt. % of at least one monomer of butadiene and isoprene (monomer a), (b) at least 10 wt. % of at least one monomer of acrylic and methacrylic acid esters and 1-8 C alkanol esters (monomer b) and (c) 0-10 wt. % of another radically copolymerisable monomer bearing at least one ethylenic unsatd. gp. (monomer c) distributed in the dispersed state in the radically polymerised form, the total of monomers (a) and (b) polymerisation-introduced in the radically polymerised form is at least 90 wt. % per total of monomers (a). Also claimed are latex foam rubbers and a method for producing large polymer particles in the water-based polymer dispersion.

    AQUEOUS DISPERSIONS OF HYDROSOLUBLE POLYMERISATES OF ETHYLENICALLY UNSATURATED ANIONIC MONOMERS, METHOD FOR THE PRODUCTION AND USE THEREOF
    38.
    发明专利
    AQUEOUS DISPERSIONS OF HYDROSOLUBLE POLYMERISATES OF ETHYLENICALLY UNSATURATED ANIONIC MONOMERS, METHOD FOR THE PRODUCTION AND USE THEREOF 未知

    公开(公告)号：CA2532918C

    公开(公告)日：2012-07-10

    申请号：CA2532918

    申请日：2004-07-17

    Applicant: BASF AG

    Inventor： MUKHERJEE PULAKESH ,  LEDUC MARC ,  CLAASSEN PETER ,  GAUWEILER WERNER ,  NOWACK ROLAND

    IPC: C08F291/06 ,  C08F251/00 ,  C08F265/00 ,  C08F283/06

    Abstract: The invention relates to aqueous dispersions of hydrosoluble polymerisates of ethylenically unsaturated anionic monomers obtainable by monomer radical polymerisation in an aqueous medium in the presence of at least one type of stabiliser characterised in that the polymerisation is carried out in the presence of at least one type of hydrosoluble polymer of the following groups: (a) branched polymerisates of vinyl acetate and/or vinyl propionate on polyethylenglycol, polyethylenglycol closed on one or two sides, by terminal groups comprising alkyl, carboxyl or amino groups, copolymerisate of alkylpolyalkylenglycolacrylates or alkylpolyalkylenglycolmethacrylates and acrylic acid and/or methacrylic acid, polyalkylenglycols, polyethylenglycole closed on one or two sides, by terminal groups comprising alkyl, carboxyl or amino groups; and (b) hydrolysed copolymerisates of vinylalkylethers and maleic anhydride in the form of free carboxyl groups and in the form of salts neutralised at least partially by alkali metal hydroxides or ammonium basses and/or a starch of a cationically modified potato starch group, cationically modified potato starch, degradable potato and maltodextrin starches which are used in the form of stabilisers. A method for producing said aqueous dispersions by monomer radical polymerisation in an aqueous medium in the presence of said hydrosoluble polymerisates of the groups (a) and (b) and the use of said aqueous dispersions in the form of thickeners for aqueous systems are also disclosed.

    DISPERSIONES ACUOSAS DE POLIMERIZADOS HIDROSOLUBLES DE MONOMEROS ANIONICOS ETILENICAMENTE INSATURADOS, SU PROCEDIMIENTO DE FABRICACION Y SU UTILIZACION.
    39.
    发明专利
    DISPERSIONES ACUOSAS DE POLIMERIZADOS HIDROSOLUBLES DE MONOMEROS ANIONICOS ETILENICAMENTE INSATURADOS, SU PROCEDIMIENTO DE FABRICACION Y SU UTILIZACION. 未知

    公开(公告)号：ES2279418T3

    公开(公告)日：2007-08-16

    申请号：ES04763311

    申请日：2004-07-17

    Applicant: BASF AG

    Inventor： MUKHERJEE PULAKESH ,  LEDUC MARC ,  CLAASSEN PETER ,  GAUWEILER WERNER ,  NOWACK ROLAND

    IPC: C08F291/06 ,  C08F251/00 ,  C08F265/00 ,  C08F283/06

    Abstract: Dispersiones acuosas de polímeros hidrosolubles constituidos de monómeros aniónicos con insaturación etilénica que se pueden obtener por polimerización homolítica de los monómeros en un medio acuoso en presencia al menos de un estabilizador, caracterizadas por que se realiza la polimerización en presencia al menos de un polímero hidrosol de los siguientes grupos: (a) polímeros de injerto de acetato de vinilo y/o de propionato de vinilo sobre polietilenglicoles, polietilenglicoles con grupos terminales bloqueados sobre uno o los dos lados por grupos alquilo, carboxilo o amino y/o copolímeros de metacrilatos - glicoles alquilpolialquileno y ácido metracrílico, y al menos de un polímero hidrosoluble elegido entre (b) copolímeros hidrolizados de vinilalquiléteres y anhídrido de ácido maleico en forma de grupos carboxilo libres y en forma de sales neutralizadas al menos parcialmente por hidróxidos de metales alcalinos o bases de amonio, y/o de un almidón hidrosoluble del grupo del almidón de patata, almidón de patata degradado y maltodextrina, como estabilizador.

    40.
    发明专利
    未知

    公开(公告)号：BRPI0412844A

    公开(公告)日：2006-09-26

    申请号：BRPI0412844

    申请日：2004-07-17

    Applicant: BASF AG

    Inventor： MUKHERJEE PULAKESH ,  LEDUC MARC ,  CLAASSEN PETER ,  GAUWEILER WERNER ,  NOWACK ROLAND

    IPC: C08F251/00 ,  C08F265/00 ,  C08F283/06 ,  C08F291/06

    Abstract: An aqueous dispersion of water-soluble polymers obtained by free radical polymerization of ethylenically unsaturated anionic monomers in an aqueous medium in the presence of a stabilizer, wherein the stabilizer comprises: (a) at least one water-soluble polymer selected from the group consisting of a graft polymer of vinyl acetate and/or vinyl propionate on polyethylene glycol, a polyethylene glycol blocked at one or both terminal groups with an alkyl, a carboxyl or an amino group, and a copolymer of alkyl polyalkylene glycol methacrylate and methacrylic acid; and (b) at least one water-soluble polymer selected from the group consisting of a hydrolyzed copolymer of vinyl alkyl ether and maleic anhydride in the form of free carboxyl groups or in the form of salts at least partially neutralized with one or more alkali metal hydroxides or one or more ammonium bases, a cationically modified potato starch, an anionically modified potato starch, a degraded potato starch and maltodextrin.

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