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236 条记录 (耗时 0.018 秒)

    GLASSES WITH VERY HIGH REFRACTIVE INDEX
    7.
    发明授权
    GLASSES WITH VERY HIGH REFRACTIVE INDEX 失效
    具有非常高的折射率眼镜

    公开(公告)号：EP0971861B1

    公开(公告)日：2004-04-07

    申请号：EP98904718.8

    申请日：1998-01-27

    申请人： Corning S.A.

    发明人： COMTE, Marie, J., M.

    IPC分类号： C03C3/068

    CPC分类号： C03C3/068

    摘要： The invention concerns glasses that have a refractive index of more than 1.880, an Abbe number of more than or equal to 30.4, and a density of more than 4.1, and having the following chemical composition, expressed in wt.%, based on the oxides: SiO2: 6-9, B2O3: 15-19, with SiO2+B2O3 /=44, CaO: 8 to /=9, Y2O3: 0-5, WO3: 0-5, Li2O+Na2O+K2O: 0-2, others 0-1.

    Foam control agents
    9.
    发明公开
    Foam control agents 审中-公开
    Schaumkontrollmittel

    公开(公告)号：EP1070526A3

    公开(公告)日：2003-09-10

    申请号：EP00305832.8

    申请日：2000-07-11

    申请人： DOW CORNING S.A.

    发明人： Hoogland, Jan ,  Colson, Anick

    IPC分类号： B01D19/04 ,  C11D3/37 ,  C11D3/20 ,  C11D3/36 ,  C11D3/12

    CPC分类号： C11D3/2013 ,  B01D19/0404 ,  C11D3/0026 ,  C11D3/2079 ,  C11D3/362 ,  C11D3/373 ,  C11D11/0088 ,  B01D19/0409 ,  B01D19/0418

    摘要： A foam control agent comprises a homogeneous mixture of an organopolysiloxane (A) and a stabilising aid (B) containig a finely divided hydrophobic filler (C ) at 0.1 to 15% by weight. The siloxane units of (A) consist essentially of 0 to 60% of units of the general formula (i) R a SiO (4- a /2) wherein R denotes a hydrocarbon group having up to 8 carbon atoms and a has a value of from 0 to 3, and 40 to 100% of units of the general formula (ii) R b R'' c SiO (4-b-c/2) wherein R'' denotes a group -Z z -R', wherein R' denotes an alkyl group having from 9 to 35 carbon atoms, Z denotes a linking group between silicon and R' and z has a value of 0 or 1, b has a value of 0, 1 or 2, c has a value of 1 or 2, and b + c has a value of 1, 2 or 3, provided more than 70% by weight of the carbon content of the organopolysiloxane is due to the groups R''. (B) has a melting point of 40 to 80°C and preferably is a fatty acid, a fatty alcohol, and an alkylphosphoric acid of the formula:- wherein R j is a linear or branched alkyl or alkenyl group containing from 12 to 24 carbon atoms EO represents ethylene oxide and s is zero, 1 or 2. (B) in its liquid form is preferably miscible with the organopolysiloxane (A) so as to form a homogeneous liquid which upon cooling forms a monophasic waxy substance.