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    • 3. 发明授权
    • Method of heat treating a porous optical fiber preform
    • 热处理多孔光纤预制件的方法
    • US08341979B2
    • 2013-01-01
    • US12474689
    • 2009-05-29
    • Kenji Okada
    • Kenji Okada
    • C03B37/023
    • C03B37/01446
    • A method of producing an optical fiber preform by heating a glass preform that has a glass rod and a silica glass porous body and includes a valid portion and invalid portions, comprising: heating the glass preform while moving the glass preform along its axial direction relative to a heater; stopping the relative movement or decreasing a speed of the relative movement when an invalid portion positioned at a tail end reaches a vicinity of the heater; heating the invalid portion for a predetermined time while maintaining a temperature at which the silica glass porous body can be vitrified; decreasing the heating temperature to a temperature determined by adding 200° C. to an annealing point of a silica glass; and removing the glass preform to the outside of the heating furnace without increasing the heating temperature to the temperature at which the silica glass porous body is vitrified.
    • 一种通过加热具有玻璃棒和石英玻璃多孔体并具有有效部分和无效部分的玻璃预制棒来制造光纤预制件的方法,包括:在相对于 加热器 当位于尾端的无效部分到达加热器附近时,停止相对运动或减小相对运动的速度; 在保持石英玻璃多孔体可以玻璃化的温度的同时加热无效部分一段预定时间; 将加热温度降低至通过将二氧化硅玻璃的退火点加入200℃而确定的温度; 并且将玻璃预制件移至加热炉的外部,而不将加热温度升高到石英玻璃多孔体被玻璃化的温度。
    • 6. 发明申请
    • Curing composition
    • 固化组合物
    • US20070179249A1
    • 2007-08-02
    • US10561326
    • 2004-06-21
    • Kenji OkadaYoshiki Nakagawa
    • Kenji OkadaYoshiki Nakagawa
    • C08F8/00
    • C08F290/04
    • An object of the present invention is to provide a curable composition comprising a vinyl polymer, the curable composition capable of providing a cured product having good mechanical properties. The present invention is a curable composition comprising (A) a vinyl polymer (I) comprising, at the molecular terminal, at least one group represented by the general formula (1): CH2═C(Ra)—C(O)O— (1), wherein Ra represents a hydrogen atom or a monovalent organic group having 1 to 20 carbon atoms, and (B) a monoacrylate phenolic antioxidant.
    • 本发明的目的是提供一种包含乙烯基聚合物的可固化组合物,该固化组合物能够提供具有良好机械性能的固化产物。 本发明是一种可固化组合物,其包含(A)乙烯基聚合物(I),其在分子末端包含至少一个由通式(1)表示的基团:CH 2 CO 2(R C(O)O-(1)其中R a表示氢原子或碳原子数1〜20的一价有机基团,(B) 单丙烯酸酯酚类抗氧化剂。