PROCEDIMIENTO PARA LA MARCACION DE LIQUIDOS CON POR LO MENOS DOS SUSTANCIAS MARCADORAS Y PROCEDIMIENTO PARA SU DETECCION

    公开(公告)号:PE20000464A1

    公开(公告)日:2000-06-02

    申请号:PE00033299

    申请日:1999-04-20

    Applicant: BASF AG

    Abstract: PROCEDIMIENTO EN EL CUAL ENTRE DOS Y DIEZ SUSTANCIAS MARCADORAS SE USAN PARA LA MARCACION DE LIQUIDOS. DICHAS SUSTANCIAS MARCADORAS SON DE PREFERENCIA FTALOCIANINAS CON O SIN METALES, NAFTALOCIANINAS CON O SIN METALES, COMPLEJOS DE NIQUEL-DITIOLENO, COMPUESTOS DE AMINIO DE AMINAS AROMATICAS, COLORANTES DE METINO, COLORANTES DE ACIDO CUADRATICO O COLORANTES DE ACIDO CROCONICO, Y ABSORBEN EN LA ZONA ESPECTRAL DE 600 A 1200 nm (RADIACION FLUORESCENTE), SIENDO ESTA ZONA DE ABSORCION NO SOLAPANTE, Y UNA DE LAS SUSTANCIAS MARCADORAS POSEE UNA LONGITUD DE ONDA DEL MAXIMO DE ABSORCION DE MAS DE 850 nm. ADEMAS SE REFIERE A LA DETECCION DE DICHAS SUSTANCIAS MARCADORAS USANDO UNA FUENTE DE RADIACION, DE PREFERENCIA LASERES SEMICONDUCTORIZADOS, DIODOS SEMICONDUCTORES, LASERES DE ESTADO SOLIDO, QUE TIENE EMISION MAXIMA EN LA ZONA ESPECTRAL ENTRE MENOS DE 100 nm Y MAS DE 20 nm RESPECTO DE LA LONGITUD DE ONDA MAXIMO DE ABSORCION DE LA SUSTANCIA MARCADORA

    FINELY DIVIDED GEL-LIKE CROSSLINKED POLYMERS FROM WATER SOLUBLE MONOMERS AND CROSSLINKING AGENT

    公开(公告)号:AU595545B2

    公开(公告)日:1990-04-05

    申请号:AU6414786

    申请日:1986-10-17

    Applicant: BASF AG

    Abstract: Finely divided, gel-like crosslinked polymers are prepared by a continuous method in which a monomer mixture which contains, per 100 parts by weight of acrylic acid or methacrylic acid, from 50 to 100 mol % of which in each case are neutralized, acrylamide, methacrylamide or N-vinylpyrrolidone, from 0 to 30 parts by weight of other water-soluble monoethylenically unsaturated monomers and from 0 to 20 parts by weight of water-insoluble monoethylenically unsaturated monomers is copolymerized with from 0.01 to 5 parts by weight of a crosslinking agent, in 20-65% strength by weight aqueous solution in the presence of an initiator at from 45 DEG to 95 DEG C. in a single-screw cylindrical mixer whose stirrer shaft possesses disk segments which have, at the outer end, mixing bars which are arranged in a manner such that the substances fed in at the entrance of the mixer are conveyed in the axial direction to the exit of the mixer, the aqueous monomer solution in the mixer is polymerized under from 100 to 800 mbar, and some of the water is removed during the polymerization, so that a crumb-like gel having a solids content of from 30 to 70% by weight is discharged.

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