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    Method for the production of acrylonitrile polymers and copolymers
    1.
    发明授权
    Method for the production of acrylonitrile polymers and copolymers 失效
    生产丙烯腈聚合物和共聚物的方法

    公开(公告)号：US3700631A

    公开(公告)日：1972-10-24

    申请号：US3700631D

    申请日：1969-07-23

    Applicant: SNIA VISCOSA

    Inventor： SICLARI FRANCESCO ,  ROSSI PIETRO PAOLO ,  CALGARI SEBA ,  JACUONE ROBERTO

    IPC: C08F2/00 ,  C08F20/44 ,  C08F3/76 ,  C08F15/22

    CPC classification number: C08F20/44 ,  C08F2/36

    Abstract: AN IMPROVED METHOD FOR POLYMERIZATION OR COPOLYMERIZATION OF ACRYLONITRILE IS DISCLOSED, OF THE KIND IN WHICH THE POLYMERIZATION STEP IS CARRIED OUT WITHIN A POLAR ORGANIC SOLVENT, WHEREIN THE CATALYST SYSTEM IS OF THE SOCALLED REDOX TYPE AND COMPRISES A PEROXIDE, A REDUCING AGENT, A FIRST METAL, A SECOND METAL AND A POLYMERIZATION STOPPER WHICH IS SOLUBLE IN THE POLAR ORGANIC SOLVENT. ALSO THE METALS OR THEIR COMPOUND MUST BE SOLUBLE IN THE ORGANIC POLAR SOLVENT AFORESAID. THE METALS ARE COPPER AS A FIRST METAL AND IRON OR CERIUM AS THE SECOND METAL. THE STOPPER SHOULD ALSO BE A SEQUESTING AGENT FOR METALS. THE PREFERRED STOPPERS ARE SOME DERIVATIVES OF ETHYLENE DIAMINO TETRA ACETIC ACID; A FEW OF THESE DERIVATIVES, SUCH AS THE NITRATE, THE CHLORIDE AND THE PHOSPHATE OF EDTA HAVE NOT YET BEEN DESCRIBED HERETOFORE IN THE TECHNICAL LITERATURE. THE ADVANTAGE OBTAINED WITH THE METHOD AND THE COMPOUNDS OF THE INVENTION IS THAT ACRYLONITRILE COPOLYMERS AND COPOLYMERS ARE OBTAINED, WHICH SHOW IMPROVED PHYSICAL PROPERTIES AND A HIGHEST WHITENESS RATING.

    4.
    发明专利
    未知

    公开(公告)号：DE2907684A1

    公开(公告)日：1979-09-06

    申请号：DE2907684

    申请日：1979-02-27

    Applicant: SNIA VISCOSA

    Inventor： CALGARI SEBA ,  SIRTORI VITTORIO ,  BELLOBONO IGNAZIO RENATO

    IPC: H01G9/20 ,  H01M14/00 ,  H02N11/00

    Abstract: A cell for the direct conversion of radiant energy to electrical energy for carrying the process is characterized in that it comprises two layer-like zones each comprising a transparent material and at least one photochromic compound, electrical conduction means between said two zones, and two electrodes. The two layer-like zones may be constituted by different portions of a same layer. The photochromic compounds used are preferably spiro-2H-pyranes and the electrodes are metals having a standard oxidation potential higher than-2.5V or their oxides or photoactive semi-conductors.

    ELECTROCHEMICAL-PHOTOVOLTAIC CELL
    5.
    发明专利
    ELECTROCHEMICAL-PHOTOVOLTAIC CELL 未知

    公开(公告)号：AU4463379A

    公开(公告)日：1979-09-06

    申请号：AU4463379

    申请日：1979-02-27

    Applicant: SNIA VISCOSA

    Inventor： CALGARI SEBA ,  SIRTORI VITTORIO ,  BELLOBONO IGNAZIO RENATO

    IPC: H01G9/20 ,  H01M14/00 ,  H01M10/08 ,  H01L31/00

    Abstract: A cell for the direct conversion of radiant energy to electrical energy for carrying the process is characterized in that it comprises two layer-like zones each comprising a transparent material and at least one photochromic compound, electrical conduction means between said two zones, and two electrodes. The two layer-like zones may be constituted by different portions of a same layer. The photochromic compounds used are preferably spiro-2H-pyranes and the electrodes are metals having a standard oxidation potential higher than-2.5V or their oxides or photoactive semi-conductors.

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