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105 条记录 (耗时 0.036 秒)

    Crystalline resin compositions
    103.
    发明授权
    Crystalline resin compositions 失效
    结晶树脂组合物

    公开(公告)号：US4954291A

    公开(公告)日：1990-09-04

    申请号：US403395

    申请日：1989-09-06

    申请人： Toshiaki Kobayashi ,  Keiko Motomatsu

    发明人： Toshiaki Kobayashi ,  Keiko Motomatsu

    IPC分类号： C08L23/02 ,  C08K5/00 ,  C08K5/1575 ,  C08L101/00

    CPC分类号： C08K5/0008 ,  C08K5/0083 ,  C08K5/1575

    摘要： Disclosed is a crystalline resin composition containing a nucleating agent composition comprising(a) at least one of the dibenzylidene sorbitol and xylitol derivatives wherein either one of the aromatic rings has 2 or 3 methyl groups and the other is unsubstituted,(b) at least one of dibenzylidene sorbitol and xylitol, and(c) at least one of the dibenzylidene sorbitol and xylitol derivatives wherein each of the aromatic rings has 2 or 3 methyl groups, and the proportions of (a), (b) and (c) being such that Z calculated according to the equationZ=A/(A+B+C)wherein A, B and C are each the amount by weight of the components (a), (b) and (c), respectively, is within the range of about 0.3 to about 0.8.

    Process for batchwise acetal production
    104.
    发明授权
    Process for batchwise acetal production 失效
    间歇缩醛生产工艺

    公开(公告)号：US4902807A

    公开(公告)日：1990-02-20

    申请号：US279507

    申请日：1988-12-05

    申请人： Toshiaki Kobayashi ,  Kango Kujitani

    发明人： Toshiaki Kobayashi ,  Kango Kujitani

    IPC分类号： C07D493/04

    CPC分类号： C07D493/04

    摘要： Disclosed is a process for batchwise production of a 1,3:2,4-dibenzylidene-sorbitol or xylitor compound comprising subjecting a sorbitol or xylitol and a benzaldehyde compound to a condensation reaction in a reactor by feeding a homogeneous solution or suspension formed from (a) sorbitol or xylitor, (b) an aldehyde compound, (c) a lower alcohol, and if necessary (d) an acid catalyst, to the reactor, together with a hydrophobic organic solvent, continuously or intermittently while adjusting the rate of feeding of said homogeneous solution or suspension such that sorbitol or xylitol and the benzaldehyde compound are fed to the reaction system in a total amount per hour of about 0.1 to about 2 parts by weight per part by weight of the 1,3:2,4-dibenzylidene compound as found in the reaction system.

    Optical fiber
    105.
    发明授权
    Optical fiber 失效
    光纤

    公开(公告)号：US4679899A

    公开(公告)日：1987-07-14

    申请号：US706574

    申请日：1985-02-28

    申请人： Toshiaki Kobayashi ,  Kazuo Sanada ,  Toshiaki Murayama ,  Yasuyuki Sugawara ,  Naoshi Uesugi

    发明人： Toshiaki Kobayashi ,  Kazuo Sanada ,  Toshiaki Murayama ,  Yasuyuki Sugawara ,  Naoshi Uesugi

    IPC分类号： C03C25/10 ,  G02B6/44 ,  G02B6/10

    CPC分类号： C03C25/106 ,  C03C25/1065

    摘要： An optical fiber of a silica-based material includes a coating of cured silicone rubber covering an outer surface thereof. The cured silicone rubber coating, when subjected to an infrared spectroscopic measurement, has a transmissivity of not less than 70% at a wave number of 2100 to 2200 cm.sup.-1 at a coating thickness of 0.1 mm due to the infrared absorption due to the stretching and vibration of SiH. The coating of cured silicone rubber contains a neglibible amount of SiH so that the transmission loss of the optical fiber can be prevented from increasing over a long period of time.

    摘要翻译： 二氧化硅系材料的光纤包括覆盖其外表面的固化硅橡胶的涂层。 固化的硅橡胶涂层在进行红外光谱测量时，由于拉伸的红外吸收，涂布厚度为0.1mm，波数为2100〜2200cm -1，透光率为70％以上 和SiH的振动。 固化的硅橡胶的涂层含有可负的量的SiH，从而可以防止光纤的传输损耗在长时间内增加。