Preparation of polyorganosilanes
    1.
    发明授权
    Preparation of polyorganosilanes 失效
    聚有机硅烷的制备

    公开(公告)号:US5162477A

    公开(公告)日:1992-11-10

    申请号:US812284

    申请日:1991-12-23

    IPC分类号: C08G77/48 C08G77/60

    CPC分类号: C08G77/60

    摘要: Polyorganosilanes are prepared by contact reaction of organodihalosilanes with alkali metal fine particles in an organic solvent. Prior to the contact reaction, a triorganohalosilane is contacted with the dispersion of alkali metal fine particles in organic solvent for removing reactive oxygen and moisture from the dispersion. Formation of a siloxane bond in the polysilane backbone is minimized, and polyorganosilanes having a minimal oxygen content are obtained.

    摘要翻译: 聚有机硅烷通过有机二硅烷与碱金属微粒在有机溶剂中的接触反应来制备。 在接触反应之前,三有机卤代硅烷与碱金属微粒分散体在有机溶剂中接触,以从分散体除去活性氧和水分。 聚硅烷主链中硅氧烷键的形成最小化,得到氧含量最低的聚有机硅烷。

    Preparation of polyorganosilanes
    3.
    发明授权
    Preparation of polyorganosilanes 失效
    聚有机硅烷的制备

    公开(公告)号:US5159043A

    公开(公告)日:1992-10-27

    申请号:US812279

    申请日:1991-12-23

    IPC分类号: C08G77/48 C08G77/60

    CPC分类号: C08G77/60

    摘要: Polyorganosilanes are prepared through contact reaction of an organodihalosilane with alkali metal fine particles dispersed in an organic solvent. the reaction solution is adjusted to an acidity of pH 3 to 7 before or after the step of deactivating the excess alkali metal in the reaction solution. The alkali metal halide is removed from the reaction solution by dissolving it in water. Formation of insoluble components is minimized.

    摘要翻译: 聚有机硅烷通过有机二卤硅烷与分散在有机溶剂中的碱金属微粒的接触反应制备。 在使反应溶液中过量的碱金属失活的步骤之前或之后将反应溶液调节至pH 3至7的酸度。 将碱金属卤化物溶解在水中从反应溶液中除去。 不溶性组分的形成最小化。

    Optical fibers and core-forming compositions
    5.
    发明授权
    Optical fibers and core-forming compositions 失效
    光学纤维和核心成分组合物

    公开(公告)号:US5204435A

    公开(公告)日:1993-04-20

    申请号:US604526

    申请日:1990-10-29

    IPC分类号: G02B1/04

    摘要: A composition comprising (a) an organopolysiloxane having a unit of the formula: RSiO.sub.3/2 wherein R is a substituted or unsubstituted monovalent C.sub.1-10 hydrocarbon group in its molecule and having at least 0.05 alkenyl groups each directly attached to a silicon atom per silicon atom, (b) an organohydrogenpolysiloxane having at least 2 hydrogen atoms each directly attached to a silicon atom per molecule, and (c) a platinum catalyst, maintains good light transmission in cured form when exposed to humidity or stresses and is thus suitable for forming cores of optical fibers.

    摘要翻译: 一种组合物,其包含(a)具有下式的单元的有机聚硅氧烷:RSiO 3/2其中R是其分子中的取代或未取代的一价C 1-10烃基,并且每个硅直接连接至硅原子上至少有0.05个烯基 原子,(b)具有每个分子直接连接到硅原子上的至少2个氢原子的有机氢聚硅氧烷,和(c)铂催化剂,当暴露于湿度或应力时,其固化形式保持良好的透光性,因此适于形成 光纤芯。

    Optical fiber coated with an organopolysiloxane curable with actinic rays
    6.
    发明授权
    Optical fiber coated with an organopolysiloxane curable with actinic rays 失效
    涂有可用光化射线固化的有机聚硅氧烷的光纤

    公开(公告)号:US4733942A

    公开(公告)日:1988-03-29

    申请号:US930002

    申请日:1986-11-12

    摘要: The coated optical fiber of the invention is prepared by providing a coating layer of an ultraviolet-curable organopolysiloxane or a composition comprising the same and irradiating the coating layer with ultraviolet. Specifically, each of the terminal silicon atoms of the organopolysiloxane, which preferably has a linear molecular structure, has two or more ethylenically unsaturated polymerizable groups bonded thereto through an oxygen atom, such as CH.sub.2 .dbd.CHCOOCH.sub.2 CH.sub.2 --, [CH.sub.2 .dbd.C(CH.sub.3)COOCH.sub.2 ].sub.3 C--CH.sub.2 --and (CH.sub.2 .dbd.CHCOOCH.sub.2).sub.2 C(C.sub.2 H.sub.5)CH.sub.2 --. By virtue of this unique molecular structure of the organopolysiloxane, the coating layer is rapidly cured by ultraviolet irradiation to give a cured coating layer exhibiting very low water absorption and small temperature dependency of the Young's modulus at low temperatures.

    摘要翻译: 通过提供可紫外线固化的有机聚硅氧烷的涂层或包含该涂层的组合物制备本发明的涂覆光纤,并用紫外线照射该涂层。 具体地,优选具有线性分子结构的有机聚硅氧烷的末端硅原子具有通过氧原子如CH 2 = CHCOOCH 2 CH 2 - ,[CH 2 = C(CH 3)COOCH 2)与氧原子键合的两个或更多个烯键式不饱和可聚合基团 ] C 3 -C 12 - 和(CH 2 = CHCOOCH 2)2 C(C 2 H 5)CH 2 - 。 由于有机聚硅氧烷的这种独特的分子结构,通过紫外线照射使涂层快速固化,得到在低温下表现出非常低的吸水率和较小的杨氏模量温度依赖性的固化涂层。

    Surface-coated optical fiber
    7.
    发明授权
    Surface-coated optical fiber 失效
    表面光纤

    公开(公告)号:US4697877A

    公开(公告)日:1987-10-06

    申请号:US709036

    申请日:1985-03-06

    摘要: The surface-coated optical fiber of the invention is composed of a fibrous body of a vitreous material, e.g. fused quartz glass, and a coating layer thereon formed of a coating composition comprising an organosiloxane-modified organic polymer, of which the backbone is formed of recurring organic units such as a polybutadiene, an acrylic polymer and the like having modifying pendant groups containing an organosiloxane unit. The workability of the coating composition in the coating application is excellent so that a high uniformity is obtained in the coating layer in comparison with a coating composition comprising an unmodified organic polymer. The coating layer thus formed has a remarkably improved mechanical strength over a coating layer formed of an organopolysiloxane resin alone.

    摘要翻译: 本发明的表面被覆光纤由玻璃质材料的纤维体构成,例如, 熔融石英玻璃及其上的涂层由包含有机硅氧烷改性的有机聚合物的涂料组合物形成,所述有机硅氧烷改性的有机聚合物的主链由诸如聚丁二烯的重复有机单元形成,具有包含有机硅氧烷的改性侧基的丙烯酸类聚合物等 单元。 涂料组合物在涂布应用中的可加工性是优异的,因此与包含未改性的有机聚合物的涂料组合物相比,在涂层中获得高均匀性。 如此形成的涂层相对于仅由有机聚硅氧烷树脂形成的涂层而言具有显着提高的机械强度。

    Novel organopolysiloxane, method for the preparation thereof and
composition containing the same
    8.
    发明授权
    Novel organopolysiloxane, method for the preparation thereof and composition containing the same 失效
    新型有机聚硅氧烷,其制备方法和含有它们的组合物

    公开(公告)号:US4683320A

    公开(公告)日:1987-07-28

    申请号:US878002

    申请日:1986-06-24

    摘要: In the alkenyl-containing diorganopolysiloxane of the invention, the distribution of the alkenyl groups in the molecule is not random as in conventional alkenyl-containing diorganopolysiloxanes but each of at least three siloxane units linked to each of the terminal silicon atoms has an alkenyl, e.g. vinyl, group while at least six of the uninterruptedly linked siloxane units excepting the above mentioned alkenyl-containing units adjacent to the molecular chain ends are free from aliphatic unsaturation. A method for the preparation of the diorganopolysiloxane having the alkenyl groups in such a localized distribution is disclosed. When the diorganopolysiloxane is used as the principal ingredient of a curable organopolysiloxane composition as combined with a crosslinking agent, the composition, despite its relatively low viscosity, can give a cured rubber having markedly improved mechanical strengths.

    摘要翻译: 在本发明的含链烯基的二有机聚硅氧烷中,分子中链烯基的分布不像常规的含链烯基的二有机聚硅氧烷那样是无规的,但是每个末端硅原子连接的至少三个硅氧烷单元中的每一个都具有链烯基。 乙烯基,而除上述与分子链末端相邻的含烯基单元之外的至少六个不间断连接的硅氧烷单元不含脂族不饱和基团。 公开了一种在这种局部分布中制备具有烯基的二有机聚硅氧烷的方法。 当二有机聚硅氧烷用作可交联有机聚硅氧烷组合物与交联剂组合的主要成分时,组合物尽管具有较低的粘度,但可以得到具有明显改善的机械强度的固化橡胶。

    Method for forming a surface film of cured organosilicon polymer on a
substrate surface
    9.
    发明授权
    Method for forming a surface film of cured organosilicon polymer on a substrate surface 失效
    在基材表面上形成固化的有机硅聚合物的表面膜的方法

    公开(公告)号:US4678688A

    公开(公告)日:1987-07-07

    申请号:US834906

    申请日:1986-02-28

    IPC分类号: C08G77/54 C09D183/14 B05D3/02

    摘要: The inventive method for forming a cured film on a substrate surface comprises coating the surface with a room temperature curable organosiloxazane polymer comprising, in a molecule, (a) at least one organosiloxane unit represented by the unit formula (a) at least one organosiloxane unit represented by the unit formulaR.sup.1.sub.a SiO.sub.(4-a)/2,and (b) at least one organosilazane unit represented by the unit formulaR.sup.2.sub.b Si(NR.sup.3).sub.(4-b)/2,in which R.sup.1, R.sup.2 and R.sup.3 are each a hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon group, not all of them being simultaneously hydrogen atoms, and the subscripts a and b are each a positive integer of 1, 2 or 3 with the proviso that a and b cannot be simultaneously equal to 3, in a molecule and subjecting the coating film to exposure to a moisture-containing atmosphere. The method is useful for forming a surface-protecting film or for imparting surface releasability.

    摘要翻译: 用于在基材表面上形成固化膜的本发明方法包括用室温可固化的有机硅氮烷聚合物涂覆表面,所述室温可固化的有机硅氮烷聚合物在分子中包含(a)至少一个由式(a)表示的有机硅氧烷单元,至少一个有机硅氧烷单元 由式R1aSiO(4-a)/ 2表示的至少一种有机硅氮烷单元,(b)由单元式R2bSi(NR3)(4-b)/ 2表示的至少一种有机硅氮烷单元,其中R1,R2和R3各自为 氢原子或取代或未取代的一价烃基,并不全部同时为氢原子,下标a和b各自为正整数1,2或3,条件是a和b不能同时为3 在分子中并使涂膜暴露于含水气氛。 该方法可用于形成表面保护膜或赋予表面剥离性。