92.
    发明专利
    未知

    公开(公告)号:DE59811610D1

    公开(公告)日:2004-08-05

    申请号:DE59811610

    申请日:1998-02-25

    Applicant: BASF AG

    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).

    94.
    发明专利
    未知

    公开(公告)号:ES2163686T3

    公开(公告)日:2002-02-01

    申请号:ES97109083

    申请日:1997-06-05

    Applicant: BASF AG

    Abstract: The production of polymer powder (I) suitable for the modification of mineral binder building materials, involves drying an aqueous polymer dispersion which forms films with a Tg of not above 30 degrees C, where before drying, the dispersion is treated with drying agents (IIa) which have a liquefying action on the mineral binder when it is mixed with water and ready for use; after drying, the powder (I) is treated with finely divided solid additive(s) (IIIa) which have a solidifying action on the binder/water mix. Alternatively, the dispersion is treated with solidifying driers (IIb) before drying, and the dried powder is treated with finely divided solid additives (IIIb) which have a liquefying action on the mix. Also claimed are: (i) polymer powder (I) obtained by this process; (ii) mineral binders containing (I); and (iii) dry mortar preparations containing 20-60 wt% mineral binder, 0.1-20 wt% (I) and up to 25 wt% conventional additives, the remainder consisting of sand, fillers, pigments and natural and/or synthetic fibres.

    96.
    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

    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).

    98.
    发明专利
    未知

    公开(公告)号:DE19623412A1

    公开(公告)日:1997-12-18

    申请号:DE19623412

    申请日:1996-06-12

    Applicant: BASF AG

    Abstract: The production of polymer powder (I) suitable for the modification of mineral binder building materials, involves drying an aqueous polymer dispersion which forms films with a Tg of not above 30 degrees C, where before drying, the dispersion is treated with drying agents (IIa) which have a liquefying action on the mineral binder when it is mixed with water and ready for use; after drying, the powder (I) is treated with finely divided solid additive(s) (IIIa) which have a solidifying action on the binder/water mix. Alternatively, the dispersion is treated with solidifying driers (IIb) before drying, and the dried powder is treated with finely divided solid additives (IIIb) which have a liquefying action on the mix. Also claimed are: (i) polymer powder (I) obtained by this process; (ii) mineral binders containing (I); and (iii) dry mortar preparations containing 20-60 wt% mineral binder, 0.1-20 wt% (I) and up to 25 wt% conventional additives, the remainder consisting of sand, fillers, pigments and natural and/or synthetic fibres.

Patent Agency Ranking