Preparation of polyorganosiloxanes by interfacial polymerization
    1.
    发明授权
    Preparation of polyorganosiloxanes by interfacial polymerization 失效
    通过界面聚合制备聚有机硅氧烷

    公开(公告)号:US5637668A

    公开(公告)日:1997-06-10

    申请号:US625983

    申请日:1996-04-01

    IPC分类号: C08G77/06 C08G77/44

    CPC分类号: C08G77/06 C08G77/44

    摘要: A process for manufacturing high molecular weight polysiloxane copolymers by interfacial polymerization. The polysiloxanes may contain phenylmethyl siloxane blocks and dimethyl siloxane blocks, alternately polymerized together to form an (A.sub.m B.sub.n).sub.x type copolymer. The interfacial polymerization process is fast, proceeds smoothly at room temperature, and is not reversible, i.e., no cyclic siloxane species are generated. The polysiloxanes can be formed as thermoplastic elastomers suitable for use as sealants, fillers, and films.

    摘要翻译: 通过界面聚合制备高分子量聚硅氧烷共聚物的方法。 聚硅氧烷可以含有苯基甲基硅氧烷嵌段和二甲基硅氧烷嵌段,交替聚合在一起形成(AmBn)x型共聚物。 界面聚合方法快速,在室温下平稳进行,不可逆,即不产生环状硅氧烷物质。 聚硅氧烷可以形成为适合用作密封剂,填料和薄膜的热塑性弹性体。

    Preparation of polyorganosiloxanes by interfacial polymerization
    2.
    发明授权
    Preparation of polyorganosiloxanes by interfacial polymerization 失效
    通过界面聚合制备聚有机硅氧烷

    公开(公告)号:US5629401A

    公开(公告)日:1997-05-13

    申请号:US626711

    申请日:1996-04-01

    IPC分类号: C08G77/04 C08G77/06 C08G77/00

    CPC分类号: C08G77/06 C08G77/04

    摘要: An interfacial polymerization process wherein organosilicon reactants are dissolved in mutually immiscible, nonaqueous solvents, and a condensation product is formed at the interface. This technique has many of the advantages of analogous organic interfacial polymerization, and may be used, for example, to prepare crosslinked films, fibers, particles, or encapsulants. Structures which cannot be prepared by other routes can be made. In particular, a well-defined alternating dimethyl/diphenyl siloxane block copolymer can be prepared by condensing a dihalo organosilicon compound such as diphenyldichlorosilane (C.sub.6 H.sub.5).sub.2 SiCl.sub.2 in diphenyl ether with a dimethyl silanolate in cyclohexane. The advantages are ability to control polymer structure, and there is no rearrangement during polymerization.

    摘要翻译: 界面聚合方法,其中有机硅反应物溶解在相互不混溶的非水溶剂中,并且在界面处形成缩合产物。 该技术具有类似的有机界面聚合的许多优点,并且可以用于例如制备交联膜,纤维,颗粒或密封剂。 可以制作不能用其他路线制作的结构。 特别地,可以通过将二苯醚中的二卤代有机硅化合物如二苯基二氯硅烷(C 6 H 5)2 SiCl 2与二甲基硅烷醇酯在环己烷中缩合来制备明确定义的交替的二甲基/二苯基硅氧烷嵌段共聚物。 优点是控制聚合物结构的能力,聚合过程中不存在重排。

    Method for preparing tubing and hollow fibers from non-crosslinked
polyvinyl alcohol hydrogels
    5.
    发明授权
    Method for preparing tubing and hollow fibers from non-crosslinked polyvinyl alcohol hydrogels 失效
    从非交联聚乙烯醇水凝胶制备管材和中空纤维的方法

    公开(公告)号:US5225120A

    公开(公告)日:1993-07-06

    申请号:US851599

    申请日:1992-03-16

    摘要: This invention relates to hollow elongate articles such as tubing and fibers formed from non-crosslinked polyvinyl alcohol. The articles are prepared by extruding a solution of polyvinyl alcohol in the shape of the desired article into a coagulating bath concurrently with a stream of a non-solvent for the polymer. The stream occupies the area corresponding to the interior cavity of the article and prevents collapse of the cavity until the article has solidified in the coagulation bath.

    摘要翻译: 本发明涉及中空细长制品,例如由非交联聚乙烯醇形成的管材和纤维。 通过将所需制品形状的聚乙烯醇溶液与用于聚合物的非溶剂流同时挤出到凝固浴中来制备制品。 流体占据与制品的内部空腔相对应的区域,并防止腔体塌陷,直到制品在凝固浴中凝固。

    Process to control foaming in non-aqueous systems
    6.
    发明授权
    Process to control foaming in non-aqueous systems 失效
    在非水系统中控制发泡的方法

    公开(公告)号:US4460493A

    公开(公告)日:1984-07-17

    申请号:US370713

    申请日:1982-04-22

    申请人: Arnold W. Lomas

    发明人: Arnold W. Lomas

    IPC分类号: B01D19/04

    CPC分类号: B01D19/0409

    摘要: A composition, used to control foaming in non-aqueous systems consisting essentially of (A) a foam control agent for non-aqueous systems that is not readily soluble in the non-aqueous systems, (B) a dispersing agent, and (C) a non-ionic surfactant having an HLB number greater than 10, is disclosed.

    摘要翻译: 用于控制非水系统中的起泡的组合物,其基本上由(A)用于非水系统的非水系统的泡沫控制剂组成,其不易溶于非水系统,(B)分散剂,和(C) 公开了HLB值大于10的非离子表面活性剂。