Fluoroorganopolysiloxane and a process for preparing the same
    43.
    发明授权
    Fluoroorganopolysiloxane and a process for preparing the same 失效
    氟代聚氧乙烯醚及其制备方法

    公开(公告)号:US5118775A

    公开(公告)日:1992-06-02

    申请号:US481208

    申请日:1990-02-20

    IPC分类号: C08G77/06 C08G77/22 C08G77/24

    CPC分类号: C08G77/24

    摘要: A fluoroorganopolysiloxane having the following general unit formula (I): ##STR1## wherein R.sup.1 represents a fluorine-containing organic group represented by the following formula:F--(--C.sub.g F.sub.2g O--).sub.d --C.sub.h F.sub.2h CH.sub.2 --whered represents an integer of from 1 to 5, g represents an integer of from 1 to 3, and h is an integer of 1 or 2,R.sup.2 represents a divalent hydrocarbon group containing no fluorine atom,R.sup.3 represents a hydrocarbon group containing no fluorine atom,a is a number of from 0.001 to 0.34,b is a number of from 1.64 to 2.34,c is a number of from 0 to 0.67, and a+b+c ranges from 1.90 to 2.67,and having a viscosity of not less than 1.times.10.sup.6 at 25.degree. C., and a process for preparing the same. This polymer is useful as a raw material of heat-vulcaization type fluorosilicone rubber.

    摘要翻译: 具有以下通式(I)的氟代有机聚硅氧烷:其中R1表示由下式表示的含氟有机基团:F - ( - CgF2gO-)d-ChF2hCH2-其中d表示 1〜5,g表示1〜3的整数,h为1或2的整数,R 2表示不含氟原子的二价烃基,R 3表示不含氟原子的烃基,a为数 为0.001〜0.34,b为1.64〜2.34的数,c为0〜0.67的数,a + b + c为1.90〜2.67,25℃时的粘度为1×10 6以上 C.及其制备方法。 该聚合物可用作热氧化型氟硅橡胶的原料。

    Method for the preparation of an organohydrogenpolysiloxane as a product
of a partial addition reaction
    46.
    发明授权
    Method for the preparation of an organohydrogenpolysiloxane as a product of a partial addition reaction 失效
    用于制备作为部分添加反应的产物的组氨酸聚硅氧烷的方法

    公开(公告)号:US4011247A

    公开(公告)日:1977-03-08

    申请号:US512369

    申请日:1974-10-04

    CPC分类号: C07F7/0896 C08G77/045

    摘要: Starting from an organohydrogenpolysiloxane having at least two hydrogen atoms directly bonded to the silicone atoms, an organohydrogenpolysiloxane is obtained in which part of the silicon-bonded hydrogen atoms have been converted into organic groups and the remaining silicon-bonded hydrogen atoms are left unreacted. The starting organohydrogenpolysiloxane is brought to the partial addition reaction with less than equivalent amount of an organic unsaturated compound having aliphatic double bond in the molecule in the presence of a platinum catalyst, and the reaction mixture is subjected to distillation while the platinum catalyst is deactivated by added benzothiazole or derivatives thereof, thus providing for the production of the organohydrogenpolysiloxane of the invention in reproducibly in high yield. The compounds are useful as crosslinking agents in the manufacture of various silicone products.

    Curable organosilicon compositions
    47.
    发明授权
    Curable organosilicon compositions 失效
    固化有机硅组合物

    公开(公告)号:US3996195A

    公开(公告)日:1976-12-07

    申请号:US524220

    申请日:1974-11-15

    IPC分类号: C08L83/04 H01B3/46 C08L83/06

    摘要: An improved curable organosilicon composition is formulated by blending a resin-type organopolysiloxane containing vinyl groups equivalent to 2.0 to 40 mole % of the organic groups with an organohydrogenpolysiloxane containing at least 2 hydrogen atoms directly bonded to the silicon atoms and epoxy and/or ester groups bonded to the silicon atoms through carbon atoms in the presence of a platinum catalyst, in which hydrosilation reaction takes place between the vinyl groups and the silicon-bonded hydrogen atoms to give crosslinked structure to volume cured. The compositions have a sufficiently long pot life and on curing create strong adhesion to metal, glass and ceramic and the like surfaces. The cured compositions have very high transparency and good thermal stability, and they are useful for various applications such as the manufacture of electronic parts.

    摘要翻译: 改进的可固化有机硅组合物通过将含有相当于2.0至40摩尔%有机基团的乙烯基的树脂型有机基聚硅氧烷与包含直接键合至硅原子的至少2个氢原子的有机氢聚硅氧烷和环氧基和/或酯基 在铂催化剂存在下,通过碳原子与硅原子键合,其中在乙烯基和与硅键合的氢原子之间发生硅氢化反应,得到交联结构体积固化。 组合物具有足够长的适用期并且在固化时对金属,玻璃和陶瓷等表面产生强烈的粘合性。 固化的组合物具有非常高的透明度和良好的热稳定性,并且它们可用于各种应用,例如电子部件的制造。