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140 条记录 (耗时 0.035 秒)

    Photocurable resin composition
    113.
    再颁专利
    Photocurable resin composition 失效

    公开(公告)号：USRE35135E

    公开(公告)日：1995-12-26

    申请号：US214005

    申请日：1994-03-15

    申请人： Takeshi Sakashita ,  Takayuki Nakano

    发明人： Takeshi Sakashita ,  Takayuki Nakano

    IPC分类号： A61K6/00 ,  A61K6/083 ,  C08F2/50 ,  G03F7/028

    CPC分类号： C08F2/50 ,  G03F7/028

    摘要： Disclosed is a photocurable composition comprising (a) a radical-polymerizable monomer, (b) an .alpha.-ketocarbonyl compound and (c) a derivative of mercaptobenzimidazole, mercaptobenzothiazole or mercaptobenzoxazole or an aromatic amine nucleus-substituted with an electron-attractive group. This composition has a high photocuring speed at a temperature close to normal temperature and gives a cured product excellent in various physical properties. This composition is valuable as a dental adhesive or resin.

    Copolymerized polycarbonates
    114.
    发明授权
    Copolymerized polycarbonates 失效
    共聚聚碳酸酯

    公开(公告)号：US5405933A

    公开(公告)日：1995-04-11

    申请号：US119317

    申请日：1993-09-09

    申请人： Takeshi Sakashita ,  Tomoaki Shimoda ,  Takashi Nagai

    发明人： Takeshi Sakashita ,  Tomoaki Shimoda ,  Takashi Nagai

    IPC分类号： C08G64/00 ,  C08G64/06 ,  C08G64/30

    CPC分类号： C08G64/307 ,  C08G64/06

    摘要： The present invention provides copolymerized polycarbonates having improved flow and formability, in addition to excellent mechanical properties, heat resistance, transparency, and water resistance obtained by copolymerization of two or more aromatic dihydroxy compounds and a compound capable of reacting with those aromatic dihydroxy compounds to form carbonate linkages, characterized in that, of all the constituent repeating units derived from aromatic dihydroxy compounds, 2-40 mole % are derived from resorcin and/or substituted resorcins.

    摘要翻译： 本发明提供了具有改善的流动性和成形性的共聚聚碳酸酯，除了通过两种或更多种芳族二羟基化合物和能够与这些芳族二羟基化合物反应形成的化合物的共聚合获得的优异的机械性能，耐热性，透明性和耐水性之外， 碳酸酯键，其特征在于，衍生自芳族二羟基化合物的所有构成重复单元中，2-40摩尔％衍生自间苯二酚和/或取代的芦荟蛋白。

    Preparing method of polycarbonate resin compounds for the optical use
    116.
    发明授权
    Preparing method of polycarbonate resin compounds for the optical use 失效
    用于光学用途的聚碳酸酯树脂化合物的制备方法

    公开(公告)号：US5364926A

    公开(公告)日：1994-11-15

    申请号：US22710

    申请日：1993-03-01

    申请人： Takeshi Sakashita ,  Tomoaki Shimoda ,  Kimiyoshi Miura ,  Kenichi Tominari ,  Akio Kanezawa

    发明人： Takeshi Sakashita ,  Tomoaki Shimoda ,  Kimiyoshi Miura ,  Kenichi Tominari ,  Akio Kanezawa

    IPC分类号： C08G64/20 ,  C08G64/30 ,  C08G64/40 ,  C08K3/00 ,  C08K3/30 ,  C08K3/32 ,  C08K5/00 ,  C08K5/13 ,  C08K5/1515 ,  C08K5/36 ,  C08K5/41 ,  C08K5/42 ,  C08K5/51 ,  C08K5/521 ,  C08K5/524 ,  C08L69/00 ,  C08G64/00

    CPC分类号： C08G64/307

    摘要： Object: The present invention was conceived in light of the above-described prior art. The object of this invention is to provide a method for preparing optical-grade polycarbonate compositions, which method is able to prepare with good productivity optical-grade polycarbonate compositions that have not only excellent clarity and water resistance, but also excellent retention stability such as heat stability and hue stability when molten and a low content of inclusions and impurities, and that undergo little heat deterioration.Constitution: The method for preparing optical-grade polycarbonate compositions according to this invention, which method comprises the melt-polycondensation of an aromatic dihydroxy compound and a diester carbonate in the presence of a catalyst, followed by the addition of additives [B] while the polycarbonate [A] obtained as the reaction product is in a molten state, and mixing.In this invention, it is preferable to prepare the optical-grade polycarbonate composition by filtration with a polymer filter following mixing.

    摘要翻译： 对象：本发明是鉴于上述现有技术而构成的。 本发明的目的是提供一种制备光学级聚碳酸酯组合物的方法，该方法能够制备具有良好生产率的光学级聚碳酸酯组合物，其不仅具有优异的透明度和耐水性，而且具有优异的保留稳定性，例如热 熔融时的稳定性和色调稳定性以及夹杂物和杂质含量低，并且几乎不发生热劣化。 结构：根据本发明的光学级聚碳酸酯组合物的制备方法，该方法包括在催化剂存在下芳族二羟基化合物和二酯碳酸酯的熔融缩聚，然后加入添加剂[B]，同时 作为反应产物获得的聚碳酸酯[A]处于熔融状态并混合。 在本发明中，优选在混合后用聚合物过滤器过滤制备光学级聚碳酸酯组合物。

    Catalytic melt condensation preparation of polycarbonate
    118.
    发明授权
    Catalytic melt condensation preparation of polycarbonate 失效
    聚碳酸酯的催化熔融凝结制备

    公开(公告)号：US5151491A

    公开(公告)日：1992-09-29

    申请号：US410464

    申请日：1989-09-21

    申请人： Takeshi Sakashita ,  Tomoaki Shimoda

    发明人： Takeshi Sakashita ,  Tomoaki Shimoda

    IPC分类号： C08G64/20 ,  C08G64/00 ,  C08G64/14 ,  C08G64/30 ,  C08G64/40

    CPC分类号： C08G64/14 ,  C08G64/307

    摘要： Disclosed herein are processes for the production of polycarbonates by melt polycondensation of an aromatic dihydroxy compound and a carbonic acid diester or a diphenyl carbonate compound wherein said polycondensation is carried out in the presence of from 0.05 to 15 mol %, based on 1 mole of the aromatic dihydroxy compound, of a phenol having from 10 to 40 carbon atoms, a carbonic acid diester having from 17 to 50 carbon atoms, or a carbonic acid diester having from 13 to 16 carbon atoms, using a catalyst comprising (a) a nitrogen containing basic compound, (b) from 10.sup.-8 to 10.sup.-3 mole, based on 1 mole of the aromatic dihydroxy compound, of an alkali metal or alkaline earth metal compound, and (c) boric acid or boric ester. Also disclosed is a polycarbonate in which from 5 to 30% of its terminal groups are hydroxy groups and it has a sodium content of not more than 1 ppm and a chlorine content of not more than 20 ppm.

    Curable adhesive compositions
    119.
    发明授权
    Curable adhesive compositions 失效
    可固化粘合剂组合物

    公开(公告)号：US5122061A

    公开(公告)日：1992-06-16

    申请号：US166020

    申请日：1988-03-09

    申请人： Sadao Wakumoto ,  Kazuo Ito ,  Takeshi Sakashita

    发明人： Sadao Wakumoto ,  Kazuo Ito ,  Takeshi Sakashita

    IPC分类号： A61C13/23 ,  A61K6/00 ,  A61K6/083 ,  C09J4/00 ,  C09J4/02 ,  C09J5/02

    CPC分类号： A61K6/0088 ,  C09J4/00

    摘要： A two part curable adhesive composition for use as adhesive for dental composite resin is provided, as a first part (i) a solution comprising a radical polymerizable acrylate or methacrylate monomer having in its molecule at least one group selected from the group consisting of hydroxyalkyl, hydroxyalkylene, amide, oxyalkylene and polyoxyalkylene groups, and a colvent for said radical polymerizable acrylate or methacrylate monomer; and as a second part (ii) a curable composition comprising (P) a monofunctional acrylate or methacrylate monomer, (Q) a polyfunctional acrylate or methacrylate monomer, (R) an acrylate or methacrylate monomer containing an acidic group and at least one acryloyloxyl or methacryloyloxyl group in its molecule, and (S) a trialkylboron or an oxide thereof; wherein said component (S) is maintained separate from said components (P), (Q) and (R) until immediately before use. A method for applying the above-described two-part curable adhesive composition to a dental area is provided, comprising: dissolving said radical polymerizable acrylate or methacrylate monomer in said solvent to form said solution (i); applying said solution (i) to a dental area; removing said solvent from said applied solution to form a coated area; mixing said components (P), (Q) and (R) with said component (S) to form said composition (ii); applying said composition (ii) to said coated area immediately after mixing to form a coating, and curing said coating.