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    ELASTIC POLYURETHANE FOAM AND PROCESS FOR ITS PRODUCTION
    22.
    发明授权
    ELASTIC POLYURETHANE FOAM AND PROCESS FOR ITS PRODUCTION 失效
    软质聚氨酯泡沫塑料及其制造方法

    公开(公告)号：EP0394487B2

    公开(公告)日：2005-02-16

    申请号：EP89911605.7

    申请日：1989-10-18

    申请人： Asahi Glass Co., Ltd.

    发明人： TAKEYASU, Hiromitsu ,  SONOBE, Tsunehisa ,  YAMAGUCHI, Yoshiyuki ,  DOI, Takao

    IPC分类号： C08G18/48

    CPC分类号： C08G18/632 ,  C08G18/4837 ,  C08G18/4866 ,  C08G18/672 ,  C08G2101/0008 ,  C08G2101/005 ,  C08G2101/0083 ,  C08G18/48

    摘要： The invention relates to an elastic polyurethane foam having a resonance frequency of up to 3.5 Hz and a process for producing same. This foam is obtained by using as main reactant materials at least one polyol selected from among specific polyoxyalkylene polyols and polymer dispersion polyols based on said polyoxyalkylene polyols as the matrix and a polyisocyanate compound. This foam is produced by using a polyoxyalkylene polyol having a particularly low hydroxyl value (X mg KOH/g) and a particularly low total unsaturation (Y meq/g) or a polymer dispersion polyol based on said polyoxyalkylene polyol as the matrix. More specifically the polyoxyalkylene polyol has a hydroxyl value (X mg KOH/g) of 5 to 38 and a total unsaturation (Y meq/g) of up to 0.07, with the proviso that Y « 0.9/(X-10). A preferred polyoxyalkylene polyol is one containing 70 wt.% or more oxypropylene groups and 5 wt.% or more oxyethylene groups. The use of a small amount of a crosslinking agent together with the polyoxyalkylene polyol is preferred. This foam has vibration properties suited for seat cushions of automobiles. Therefore, it can give a comfortable ride.

    Process for producing an ocular lens having a highly hydrophilic lens surface and ocular lens produced by the process
    25.
    发明公开
    Process for producing an ocular lens having a highly hydrophilic lens surface and ocular lens produced by the process 审中-公开
    一种用于生产具有亲水表面，从而制得的眼用透镜的眼用透镜过程

    公开(公告)号：EP1352735A3

    公开(公告)日：2004-10-06

    申请号：EP03008108.7

    申请日：2003-04-07

    申请人： Menicon Co., Ltd.

    发明人： Hiratani, Haruyuki, c/o Menicon Co., Ltd. ,  Ishihara, Kenichi, c/o Menicon Co., Ltd. ,  Baba, Masaki, c/o Menicon Co., Ltd.

    IPC分类号： B29D11/00 ,  B29C33/00

    CPC分类号： B29C33/38 ,  B29C33/52 ,  B29D11/00125 ,  B29K2833/26 ,  B29K2835/00 ,  B29K2839/08 ,  B29K2995/0059 ,  B29K2995/0092

    摘要： A process for producing an ocular lens having a highly hydrophilic lens surface, comprising a polymer obtained by polymerizing a monomer mixture containing a hydrophilic monomer, which comprises: a step of preparing a mold equipped with a molding cavity to provide an intended lens shape, comprising a material containing by bonding a component capable of forming hydrogen bonds with the hydrophilic monomer and capable of being dissolved in water, an organic solvent or their mixed solvent, a step of putting the monomer mixture into the molding cavity of the mold and polymerizing it, and a step of dissolving the mold in the water, the organic solvent or their mixed solvent after completion of the polymerization, so that an ocular lens comprising the polymer and having an intended lens shape, formed in the molding cavity of the mold, is taken out.

    摘要翻译： 制备装备有模腔的模具中，以提供预期的透镜形状，包括以下步骤：一种用于在眼用透镜制造具有高度亲水性的透镜表面，其包括通过含有亲水性单体，其包含单体混合物聚合而得到的聚合物处理 通过结合能够与亲水性单体形成氢键的和能的组分包含的材料溶解在水中，在有机溶剂或它们的混合溶剂中，把单体混合物到模具中的模制腔体和聚合它的步骤， 和在水中的模具中，上述有机溶剂或聚合反应完成后它们的混合溶剂中溶解，如在眼用透镜确实包含该聚合物，并在预期的透镜形状，在模具的模腔形成为具有的一个步骤中，被取 出。

    DENTAL ABRASION APPARATUS
    29.
    发明授权
    DENTAL ABRASION APPARATUS 失效
    牙齿酸蚀DEVICE

    公开(公告)号：EP1022992B1

    公开(公告)日：2004-06-09

    申请号：EP98938098.5

    申请日：1998-07-30

    申请人： DENTSPLY INTERNATIONAL, INC.

    发明人： BRASSIL, John, Michael ,  CHANG, Shu, Kun ,  QUINTANA, Reynaldo, Jose ,  BERRY, Stephen, D. ,  AYZENSHTEYN, Mikhail

    IPC分类号： A61C3/025 ,  A61C17/06

    CPC分类号： A61C3/025 ,  A61C17/043 ,  A61C17/046

    摘要： Evacuation apparatus for collecting particulates generated during dental procedures and, in particular, air abrasion procedures. The evacuation apparatus has a vacuum pump for creating a suction flow and a filter located upstream of the pump. The evacuation apparatus incorporates a cyclone separator upstream of the filter which removes abrasive, tooth, and other material from the suction flow, thereby increasing filter life and allowing the apparatus to function at full suction flow for longer periods of time. The apparatus can be used with an evacuation hand piece which provides both intra- and extra-oral evacuation to reduce the mess generated during air abrasion dental procedures. The mess is further reduced when the evacuation system is used with an abrasion system having a continuous purge feature. The continuous purge eliminates residual abrasive material in the hose and abrasive hand piece, thereby avoiding the discharge of puffs of abrasive material.