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    51.
    发明专利
    未知

    公开(公告)号：DE50103625D1

    公开(公告)日：2004-10-21

    申请号：DE50103625

    申请日：2001-03-14

    Applicant: BASF AG

    Inventor： GUENTHERBERG NORBERT ,  CZAUDERNA BERNHARD ,  BREULMANN MICHAEL ,  OEPEN SABINE ,  DUIJZINGS WIL ,  NIESSNER NORBERT

    IPC: C08F2/00 ,  C08F2/22 ,  C08F2/24 ,  C08F36/00 ,  C08F36/04 ,  C08F36/06

    Abstract: A process for the production of rubber particles containing 80-100 wt.% of a conjugated diene monomer and 0-20 wt.% of a monoethylenically unsaturated comonomer comprises emulsion polymerization in the presence of an emulsifier and an initiator whereby the monomers are added either in polymerized form as a seed latex or in monomeric form via subsequent in-situ polymerization to form a seed latex. A process for the production of rubber particles (I) containing in polymerized form (A) 80-100 wt.% of at least one conjugated diene monomer and (B) 0-20 wt.% of at least one monoethylenically unsaturated comonomer, comprises emulsion polymerization in the presence of an emulsifier and an initiator whereby: (1) a mixture (M1) comprising (M1a) 20-100 wt.% water and (M1b) 0.1-100 wt.% emulsifier is added; (2) simultaneously or thereafter a mixture (M2) comprising (M2a) 90-100 wt.% of styrene, alpha -methylstyrene, butadiene, n-butylacrylate, methylmethacrylate and/or acrylonitrile and (M2b) 0-10 wt.% of at least one copolymerizable monomer whereby monomers (M2a) and (M2b) are added either in polymerized form as a seed latex or in monomeric form via subsequent in-situ polymerization to form a seed latex, or as a mixture of polymerized and monomeric forms, whereby the seed-latex polymer has an average mol. wt. of greater than 2000; (3) the polymerization of the resulting mixture is initiated in the presence of the polymerization initiator at 5-95 [deg]C; (4) simultaneously or thereafter a mixture (M3) comprising (M3a) 0-100 wt.% comonomer (B) (wrt (B)) and (M3b) 0-25 wt.% diene monomer (A) (wrt (A)) is added; (5) simultaneously or thereafter a mixture (M4) comprising (M4a) the residual 75-100 wt.% (A) (wrt (A)) and (M4b) the residual 0-100 wt.% (B) (wrt (B)); and (6) polymerization is carried out to a conversion of 90-95 (wrt the total amount of monomers) whereby the residual 0-80 wt.% of the emulsion water and the residual 0-99.9 wt.% of the emulsifier are added individually or separately at one or more steps (2)-(5). An independent claim is included for the resulting rubber particles (I).

    METODO PARA PRODUCIR LATEX DE POLIBUTADIENO CON UN PERFIL DE CORRIENTE TERMICA OPTIMIZADO.
    52.
    发明专利
    METODO PARA PRODUCIR LATEX DE POLIBUTADIENO CON UN PERFIL DE CORRIENTE TERMICA OPTIMIZADO. 未知

    公开(公告)号：MXPA02010049A

    公开(公告)日：2003-03-10

    申请号：MXPA02010049

    申请日：2001-04-24

    Applicant: BASF AG

    Inventor： NIESSNER NORBERT

    IPC: C08F2/22 ,  C08F2/32 ,  C08F236/06 ,  C08F279/02

    Abstract: La invencion se refiere a un metodo para producir latex de polibutadieno, de acuerdo con el cual se polimeriza butadieno en una polimerizacion en emulsion por radicales en presencia de iniciadores y opcionalmente dispersantes y otros agentes auxiliares habituales. La polimerizacion se efectua en presencia de comonomeros reactivos, en tal forma que no se exceda una corriente termica de 43 watt/kg del contenido de solidos. La presencia de los comonomeros reactivos aumenta la velocidad de reaccion en el inicio de esta reaccion, obteniendo asi un perfil global de corriente termica mas plano. El comonomero reactivo preferido es estirol. El metodo preferentemente se efectua en la siguiente forma en semilotes: (a) en un primer paso, una cantidad parcial del butadieno y cuando menos una cantidad parcial de un comonomero reactivo se preparan en forma de una solucion acuosa con un iniciador termicamente desintegrador y opcionalmente dispersantes y otros agentes auxiliares habituales, y se inicia la polimerizacion, (b) en un segundo paso, la cantidad residual de butadieno y opcionalmente la cantidad residual del comonomero reactivo se adicionan como un afluente, no diluido o en solucion acuosa, opcionalmente con dispersantes y opcionalmente con otros agentes auxiliares habituales.

    Method for producing impact resistant plastics
    56.
    发明专利
    Method for producing impact resistant plastics 未知

    公开(公告)号：AU3021101A

    公开(公告)日：2001-08-07

    申请号：AU3021101

    申请日：2001-01-26

    Applicant: BASF AG

    Inventor： KEE GRAHAM EDMUND MC ,  GAUSEPOHL HERMANN ,  NIESSNER NORBERT

    IPC: C08F265/04 ,  C08F291/02 ,  C08L51/04

    Abstract: The invention relates to a process for preparing an impact-modified plastic based on crosslinked rubber particles, where (a) an aqueous dispersion or suspension of particles of a crosslinked rubber is produced from a first monomer mixture which has less than 50% by weight, preferably less than 5% by weight, in particular less than 2% by weight, content of conjugated diene compounds; (b) where appropriate, the dispersion or suspension is precipitated, giving an aqueous rubber particle mixture with water content of at least 5% by weight; (c) the dispersion or suspension of the rubber particles or the aqueous rubber particle mixture is added to a second mixture which comprises at least one other monomer, and (d) the monomers of the second mixture are polymerized. The invention further relates to a plastic obtainable by the process.

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