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    Polymerization of polyol (allyl carbonate) using polymerization initiators of short and long half lives
    22.
    发明公开
    Polymerization of polyol (allyl carbonate) using polymerization initiators of short and long half lives 失效
    使用短期和长期半衰期的聚合引发剂聚合多元醇（全氟代碳酸酯）

    公开(公告)号：EP0080338A3

    公开(公告)日：1983-07-20

    申请号：EP82306166

    申请日：1982-11-19

    申请人： PPG INDUSTRIES, INC.

    发明人： Leatherman, Ivan Roger

    IPC分类号： C08F18/24 ,  C08F04/38

    CPC分类号： C08F18/24

    摘要： A liquid composition comprising a polyol(allyl carbonate), a photochromic agent, and a first peroxide polymerization initiator characterized in that a second peroxide polymerization initiator is present, the second initiator having a half life at least five times greater than the first, measured atthe same temperature, in polyol(allyl carbonate) and a method of polymerizing a polyol(allyl carbonate) having a photochromic agent incorporated therein by adding a first peroxide polymerization initiator to the polyol(allyl carbonate) monomer and curing the polyol(allyl carbonate), characterised in that a second peroxide polymerization initiator is added to the polyol(allyl carbonate), the second initiator having a half life at least five times greaterthan the first, measured at the same temperature, in polyol(allyl carbonate).

    RADICALLY POLYMERIZABLE COMPOUND HAVING A DITHIOCARBONATE STRUCTURE AND A SULFUR-CONTAINING ALLYLCARBONATE
    26.
    发明公开
    RADICALLY POLYMERIZABLE COMPOUND HAVING A DITHIOCARBONATE STRUCTURE AND A SULFUR-CONTAINING ALLYLCARBONATE 审中-公开
    与DITHIOCARBONATSTRUKTUR和含硫碳酸烯自由基聚合CONNECTION

    公开(公告)号：EP2094654A1

    公开(公告)日：2009-09-02

    申请号：EP07832716.0

    申请日：2007-11-21

    申请人： Showa Denko K.K.

    发明人： OYAMA, Yasuyuki ,  KIBINO, Nobuyuki ,  KAI, Kazufumi ,  TAJIMA, Tsuneo

    IPC分类号： C07C329/16 ,  C08F18/24 ,  B29D11/00

    CPC分类号： C07C329/16 ,  C08F220/40 ,  C08F222/1006 ,  C08F222/24

    摘要： The invention provides a radically polymerizable compound having a dithiocarbonate structure represented by formula (1) and a sulfur-containing allylcarbonate group which can give an optical material stable and little colored at the time of thermal curing reaction, having a high refractive index and an excellent transparency, production method thereof, (co) polymer of the compound, composition containing the compound and cured product thereof, andmolded product for optical material comprising the cured product. (In the formula, R1 and R2 each independently represents a hydrogen atom or methyl group, and X and Y each independently represents a divalent group selected from group consisting of an alkylene group having 1 to 10 carbon atoms which may be branched, an arylene group and a cycloalkylene group.)

    PARTIALLY POLYMERIZED MIXTURE OF DIETHYLENE GLYCOL (ALLYL CARBONATE) COMPOUNDS
    27.
    发明授权
    PARTIALLY POLYMERIZED MIXTURE OF DIETHYLENE GLYCOL (ALLYL CARBONATE) COMPOUNDS 有权
    二醇的部分聚合的混合物的二（烯丙基碳酸酯）

    公开(公告)号：EP1044227B1

    公开(公告)日：2004-04-28

    申请号：EP98963281.5

    申请日：1998-12-16

    申请人： PPG Industries Ohio, Inc.

    发明人： HEROLD, Robert, D. ,  WU, Bo ,  OKOROAFOR, Michael, O. ,  WIEDRICH, Charles, R.

    IPC分类号： C08F18/24

    CPC分类号： C08F18/24

    摘要： A polymerizable, liquid, substantially gel-free composition comprising a partially polymerized mixture of ethylenically unsaturated compounds wherein: (a) the mixture of ethylenically unsaturated compounds which was partially polymerized comprised a mixture of diethylene glycol (allyl carbonate) compounds each represented by Formula (I) or by Formula (II), in which n is a positive integer, m is a positive integer, and the diethylene glycol (allyl carbonate) compound for which the value of n is 1 constituted from 25 to 75 area percent of the mixture of diethylene glycol (allyl carbonate) compounds; and (b) the ethylenic double bond utilization of the polymerizable, liquid, substantially gel-free composition is at least 3 percent. The polymerizable, liquid, substantially gel-free composition exhibits low shrinkage in the mold when polymerized.

    PROCESS FOR FORMING POLY(ALLYL CARBONATE)-FUNCTIONAL PREPOLYMER COMPOSITION
    29.
    发明公开
    PROCESS FOR FORMING POLY(ALLYL CARBONATE)-FUNCTIONAL PREPOLYMER COMPOSITION 有权
    用于生产聚（烯丙基碳酸酯）官能的预聚物

    公开(公告)号：EP1044228A1

    公开(公告)日：2000-10-18

    申请号：EP98964154.3

    申请日：1998-12-16

    申请人： PPG Industries Ohio, Inc.

    发明人： HEROLD, Robert, D.

    IPC分类号： C08F18/24

    CPC分类号： C08F18/24

    摘要： A process for forming a polymerizable, liquid, substantially gel-free, poly(allyl carbonate)-functional prepolymer composition comprises heating a neat composition comprising at least one poly(allyl carbonate)-functional monomer and free radical initiator having a ten-hour half-life temperature of at least 85 °C at temperatures in the range of from 5 Celsius degrees below the ten-hour half-life temperature of the free radical initiator to 150 °C, to form a reaction mixture having an increased 25 °C viscosity in the range of from 25 to 10,000 centipoises and an ethylenic double bond utilization of at least 3 percent; and over a period of less than 90 minutes cooling the reaction mixture to a temperature at least 20 Celsius degrees below the ten-hour half-life temperature of the initiator.