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    OPTICAL RESIN COMPOSITION
    2.
    发明公开
    OPTICAL RESIN COMPOSITION 审中-公开
    光学树脂组合物

    公开(公告)号：EP1044229A1

    公开(公告)日：2000-10-18

    申请号：EP99904080.1

    申请日：1999-01-12

    申请人： PPG Industries Ohio, Inc.

    发明人： SMITH, Robert, A. ,  HEROLD, Robert, D. ,  OKOROAFOR, Michael, O.

    IPC分类号： C08F212/34 ,  G02B1/04

    CPC分类号： C08G75/045 ,  C08G75/12 ,  G02B1/04 ,  C08L81/02

    摘要： Described is a polymerizable organic composition comprising an aromatic monomer having at least two vinyl groups, e.g., divinyl benzene, a polythiol monomer having at least two thiol groups, e.g., pentaerythritol tetrakis(2-mercaptoacetate), and an anhydride monomer having at least one ethylenically unsaturated group, e.g., methacrylic anhydride. Polymerizable compositions according to the present invention, may optionally further comprise a polymerizable comonomer having at least two (meth)acryloyl groups, e.g., pentaerythritol tetrakis(acrylate). Polymerizates prepared from polymerizable organic compositions of the present invention have a refractive index of at least 1.57 and an Abbe number of at least 33. Also described are photochromic articles prepared from such compositions.

    METHOD OF PREPARING AN OPTICAL POLYMERIZATE
    7.
    发明公开
    METHOD OF PREPARING AN OPTICAL POLYMERIZATE 有权
    方法用于制造光学聚合物

    公开(公告)号：EP1250369A1

    公开(公告)日：2002-10-23

    申请号：EP00978776.3

    申请日：2000-11-18

    申请人： PPG Industries Ohio, Inc.

    发明人： OKOROAFOR, Michael, O. ,  SMITH, Robert, A. ,  GRAHAM, Marvin J. ,  TABAKOVIC, Rijat ,  HEROLD, Robert, D.

    IPC分类号： C08G18/38 ,  G02B1/04 ,  G02B5/23

    CPC分类号： G02B5/23 ,  C08G18/3876 ,  C08G2120/00 ,  G02B1/041 ,  C08L75/04

    摘要： The present invention is directed to a novel method of preparing a polymerizate, which includes the step of polymerizing a two-component composition, which includes: a first component containing at least one polycyanate reactant having at least two functional groups selected from isocyanate, isothiocyanate and combinations thereof, the polycyanate reactant being the reaction product of: a polythiol monomer having at least two thiol groups; and a polycyanate monomer having at least two functional groups selected from isocyanate, isothiocyanate and combinations thereof; and a second component containing at least one polyamine reactant having at least two functional groups selected from primary amine, secondary amine and combinations thereof. The molar equivalent ratio of (NCO + NCS) groups from the first component to (-NH2 + -NH-) groups from the second component is from 0.5 to 100. The present invention is also directed to polymerizates prepared according to the method of the present invention. The present invention is further directed to photochromic articles that may be prepared from the polymerizates of the present invention.

    OPTICAL RESIN COMPOSITION COMPRISING THIOL-ENE PREPOLYMER
    10.
    发明公开
    OPTICAL RESIN COMPOSITION COMPRISING THIOL-ENE PREPOLYMER 有权
    光学树脂组合物的硫醇 - 烯的预聚物

    公开(公告)号：EP1177241A1

    公开(公告)日：2002-02-06

    申请号：EP00926147.0

    申请日：2000-04-20

    申请人： PPG Industries Ohio, Inc.

    发明人： SMITH, Robert, A. ,  HEROLD, Robert, D. ,  OKOROAFOR, Michael, O.

    IPC分类号： C08G75/04 ,  G02B1/04

    CPC分类号： G02B1/04 ,  C08G75/045 ,  C08G75/12 ,  C08L33/14 ,  C08L81/02

    摘要： Described is a polymerizable organic composition comprising: (a) a radically polymerizable gel-free prepolymer of (i) at least one first polymerizable monomer having at least two radically polymerizable ethylenically unsaturated groups, e.g., divinyl benzene, and (ii) at least one first polythiol monomer having at least two thiol groups, e.g., thioglycerol bis (mercaptoacetate); and (b) at least one second polymerizable monomer having at least two radically polymerizable ethylenically unsaturated groups, e.g., divinyl benzene and/or methacrylic anhydride, the first and second radically polymerizable monomers each being substantially free of norbornene groups. The molar equivalent ratio of ethylenically unsaturated groups of (a) (i) to the thiol groups of (a) (ii) is no greater than 1 : 1. The described polymerizable composition has reduced shrinkage, and a polymerizate prepared therefrom has a refractive index of at least 1.57 and an Abbe number of at least 33.