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    DISPERSION POBRE EN FORMALDEHIDO DE MICROCAPSULAS CONSTITUIDAS POR RESINAS DE MELAMINA-FORMALDEHIDO.
    1.
    发明专利
    DISPERSION POBRE EN FORMALDEHIDO DE MICROCAPSULAS CONSTITUIDAS POR RESINAS DE MELAMINA-FORMALDEHIDO. 未知

    公开(公告)号：ES2255745T3

    公开(公告)日：2006-07-01

    申请号：ES99114453

    申请日：1999-07-23

    Applicant: BASF AG

    Inventor： FRANK GABRIELE ,  BIASTOCH RALF DR

    IPC: B01J13/18 ,  B01J13/20

    Abstract: Microcápsulas de resina de melamina-formaldehído útiles para sistemas de grabación sensibles a la presión. Las microcápsulas se preparan añadiendo urea a una dispersión de melamina-formaldehído antes de endurecer. Las microcápsulas (I) se producen por condensación de resinas de melamina-formaldehído y/o sus métilesteres en agua, donde se dispersa el material formador d cápsula insoluble en agua, en presencia de un coloide protector aniónico con un pH de entre 3 y 6.5 y entre 20 y 50ºC seguido dl endurecimiento de las pared de la cápsula entre 50 y 100ºC. Antes del endurecimiento se añade entre 10 y 200 % en peso de urea (w-r-t resina de melanina-formaldehído) opcionalmente enlazada con puentes de etileno o puentes de propileno. Se incluye una reivindicación independiente para un sistema de grabación sensible a la presión que contiene las microcápsulas.

    4.
    发明专利
    未知

    公开(公告)号：DE19645024A1

    公开(公告)日：1998-05-07

    申请号：DE19645024

    申请日：1996-10-31

    Applicant: BASF AG

    Inventor： BOECKH DIETER DR ,  POTTHOFF-KARL BIRGIT DR ,  BERTLEFF WERNER DR ,  NEUMANN PETER DR ,  JAHNS EKKEHARD DR ,  BIASTOCH RALF DR ,  WEHLAGE THOMAS DR

    IPC: B01J13/14 ,  B01J13/18 ,  C11D3/37 ,  C11D3/39 ,  C11D17/00 ,  C11D3/395 ,  C11D1/83

    Abstract: Microcapsules containing a bleaching assistant obtained by polymerisation of a monomer mixture comprising (total monomer mixture = 100 wt. %) (a) 5-100 wt. % of at least one ethylenically unsaturated carboxylic acid anhydride, (b) 0-95 wt. % of at least one monoethylenically unsaturated monomer different to monomer group (a), (c) 0-80 wt. % crosslinking monomers having at least two non-conjugated monoethylenically unsaturated groups in the molecule and (d) 0-20 wt. % water soluble monoethylenically unsaturated monomers, in the oil phase of a stable oil-in-water emulsion in the presence of radical forming polymerisation initiators, and optionally continuously or periodically increasing the temperature of the polymerisation reaction mixture during the polymerisation are new. The oil phase of the emulsion contains or consists of the bleaching assistant. Also claimed are washing and cleaning agents containing the encapsulated bleaching agent assistants for the cleaning of textile s.

    De:inking printed waste paper, useful for making paper, card and cardboard
    6.
    发明专利
    De:inking printed waste paper, useful for making paper, card and cardboard 未知

    公开(公告)号：DE19718661A1

    公开(公告)日：1998-11-05

    申请号：DE19718661

    申请日：1997-05-02

    Applicant: BASF AG

    Inventor： OPPENLAENDER KNUT DR ,  OETTER GUENTER DR ,  BECKMANN EBERHARD DR ,  LORENCAK PRIMOZ DR ,  DYLLICK-BRENZINGER RAINER DR ,  BIASTOCH RALF DR

    IPC: D21C5/02

    Abstract: In deinking printed waste paper by beating in aqueous medium in the presence of deinking agent and purification by washing of flotation, the deinking agent (I) comprises hydrogenated 24-50C dimeric acids with an iodine number \} 20 and/or their alkali(ne earth) metal and/or ammonium salts and/or alkoxylation products. Also claimed is the use of these acids and derivatives as (I) for deinking printed waste paper. Preferably (I) consists of 30-40C acids and/or alkoxylation products, especially a 36C acid with an iodine number \} 7.5. The waste paper is beaten in the presence of aqueous sodium hydroxide solution, water glass, hydrogen peroxide (H2O2) and optionally a ligand. Alternatively, beating and flotation are carried out at pH 6.5-8.8 in the absence of these additives and surfactants.

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