Preparation of organopolysiloxanes
    22.
    发明授权
    Preparation of organopolysiloxanes 失效
    有机聚硅氧烷的制备

    公开(公告)号:US06818722B2

    公开(公告)日:2004-11-16

    申请号:US10349082

    申请日:2003-01-23

    IPC分类号: C08G7724

    CPC分类号: C08G77/02 C08G77/06

    摘要: For the preparation of organopolysiloxanes, water glass diluted with water to a concentration of 3 to 15 wt % is reacted with a triorganohalosilane in the presence of an acid and an oxygen-containing solvent such as isobutyl alcohol, methyl isobutyl ketone or 1-pentanol. The invention achieves a considerable reduction of the environmental load, an improved utilization of reactants, an improved yield, and a cost reduction, and enables production of low viscosity MQ resins.

    摘要翻译: 为了制备有机聚硅氧烷,在酸和含氧溶剂如异丁醇,甲基异丁基酮或1-戊醇的存在下,将用水稀释至3至15重量%浓度的水玻璃与三有机卤硅烷反应。 本发明实现了环境负荷的显着降低,反应物的利用率的提高,成品率的提高和成本的降低,并且能够生产低粘度的MQ树脂。

    Preparation of organohalosilanes
    25.
    发明授权
    Preparation of organohalosilanes 有权
    有机硅烷的制备

    公开(公告)号:US06395917B1

    公开(公告)日:2002-05-28

    申请号:US09981822

    申请日:2001-10-19

    IPC分类号: C07F716

    CPC分类号: C07F7/16

    摘要: When oganohalosilanes are prepared by charging a reactor with a contact mass containing a metallic silicon powder, a copper catalyst and a co-catalyst, and introducing an organohalide-containing gas into the reactor to effect the direct reaction, the catalyst and/or co-catalyst used in the contact mass is obtained by mixing particles of the catalyst and/or co-catalyst with finely divided silica, and applying shear forces to the mixture for mutually rubbing the particles, thereby producing the catalyst and/or co-catalyst having finely divided silica fused to surfaces thereof. The invention is successful in producing organohalosilanes at a significantly improved formation rate without reducing the proportion of diorganodihalosilane.

    摘要翻译: 当通过向包含金属硅粉末,铜催化剂和助催化剂的接触物质装入反应器并且将含有机卤化物的气体引入反应器以进行直接反应来制备原料卤代硅烷时,催化剂和/ 通过将催化剂和/或助催化剂的颗粒与细碎的二氧化硅混合,并向混合物施加剪切力以相互摩擦颗粒而获得催化剂,从而制备具有细小的催化剂和/或助催化剂的催化剂和/或助催化剂 分开的二氧化硅与其表面融合。 本发明成功地以显着提高的形成速率生产有机卤代硅烷,而不降低二有机二卤代硅烷的比例。

    Method of preventing polymer scale deposition and polymer scale
preventive liquid used therein
    27.
    发明授权
    Method of preventing polymer scale deposition and polymer scale preventive liquid used therein 失效
    防止聚合物垢沉积的方法和其中使用的聚合物防垢液体

    公开(公告)号:US5262497A

    公开(公告)日:1993-11-16

    申请号:US894646

    申请日:1992-06-05

    CPC分类号: C08F2/004

    摘要: Polymer scale deposition from a polymerization medium in which a monomer having an ethylenic double bond is polymerized, is prevented by conducting the polymerization in a polymerization vessel having a coating by applying a liquid comprising (A) an organic compound containing at least one member selected from the group consisting of a sulfonic acid group and a carboxylic acid group and having a molecular weight of 1000 or less and (B) a water-insoluble compound having an absorption band in the visible light range of 540 to 750 nm, the compounds (A) and (B) having been dissolved or dispersed in (C) an ester-based organic solvent, and having a pH of 3 or less; to the inner wall surfaces of said polymerization vessel. Polymer scale can be effectively prevented and polymeric products are barely colored.

    摘要翻译: 通过在包含(A)含有至少一种选自以下的物质的有机化合物的液体中进行聚合,可以防止在具有烯属双键的单体聚合的聚合介质中进行聚合, 由磺酸基和羧酸基组成的组,分子量为1000以下,(B)在54​​0〜750nm的可见光范围具有吸收带的水不溶性化合物,化合物(A )和(B)已经溶解或分散在(C)酯类有机溶剂中,并且pH为3以下; 到所述聚合容器的内壁表面。 可以有效地防止聚合物垢,聚合物几乎不着色。

    Method of preventing polymer scale deposition
    28.
    发明授权
    Method of preventing polymer scale deposition 失效
    防止聚合物垢沉积的方法

    公开(公告)号:US5244986A

    公开(公告)日:1993-09-14

    申请号:US941767

    申请日:1992-09-04

    IPC分类号: C08F2/00

    CPC分类号: C08F2/004

    摘要: A method of preventing polymer scale deposition in a polymerization vessel in polymerization of a particular monomer having an ethylenic double bond having a high dissolving power against the conventional scale preventive coatings, wherein said polymerization is carried out in a polymerization vessel of which the inner wall has been previously coated with a first coating solution comprising:(A) a water-soluble anionic dye, and(B) at least one member selected from the group consisting of inorganic colloids and cationic dyes, to form a first coating, and the first coating thus formed has been then coated with a second coating solution comprising:(C) an alkaline earth metal compound, and at least one member selected from the group consisting of:(D) a water-soluble anionic dye and(E) an inorganic colloid, to form a second coating. The polymerization vessel having the double coating as prepared above is also disclosed. Polymer scale deposition can be effectively prevented.

    摘要翻译: 一种防止聚合容器在聚合反应器中聚合具有对常规防垢涂料具有高溶解力的烯属双键的聚合物的方法,其中所述聚合在内壁具有的聚合容器中进行 预先涂覆有第一涂布溶液,其包含:(A)水溶性阴离子染料和(B)至少一种选自无机胶体和阳离子染料的成分,以形成第一涂层,并且第一涂层 这样形成的涂层已经涂覆有第二涂层溶液,其包括:(C)碱土金属化合物和至少一种选自以下的组分:(D)水溶性阴离子染料和(E)无机胶体 ,以形成第二涂层。 还公开了具有如上制备的双层涂层的聚合容器。 可以有效地防止聚合物垢沉积。

    Method of preventing polymer scale deposition and polymer scale
preventive liquid used therein
    29.
    发明授权
    Method of preventing polymer scale deposition and polymer scale preventive liquid used therein 失效
    防止聚合物垢沉积的方法和其中使用的聚合物防垢液体

    公开(公告)号:US5147455A

    公开(公告)日:1992-09-15

    申请号:US705644

    申请日:1991-05-24

    IPC分类号: C08F2/00 C08F2/44

    CPC分类号: C08F2/004

    摘要: A method of preventing polymer scale deposition during polymerization of a monomer having an ethylenically double bond in a polymerization vessel, comprising the step of carrying out said polymerization in a polymerization vessel of which the inner wall surface has a coating comprising a water-soluble polysaccharide; and a polymer scale preventive agent comprising polysaccharide. By use of the method or agent, deposition of polymer scale can be effectively prevented; in addition, polymers with a high whiteness can be prepared. Moreover, the scale preventive agent used has no poisonousness or the like and is highly safe.

    摘要翻译: 在聚合容器中具有烯键式双键的单体聚合期间防止聚合物垢沉积的方法,包括在其内壁表面具有包含水溶性多糖的涂层的聚合容器中进行所述聚合的步骤; 以及包含多糖的聚合物垢预防剂。 通过使用该方法或试剂,可以有效地防止聚合物垢的沉积; 此外,可以制备具有高白度的聚合物。 此外,所使用的防垢剂没有毒性等,并且是高度安全的。