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16 条记录 (耗时 0.032 秒)

    Production of difluoromethane
    6.
    发明授权
    Production of difluoromethane 失效
    生产二氟甲烷

    公开(公告)号：US5672786A

    公开(公告)日：1997-09-30

    申请号：US507429

    申请日：1995-09-06

    申请人： David William Bonniface ,  John David Scott ,  Michael John Watson

    发明人： David William Bonniface ,  John David Scott ,  Michael John Watson

    IPC分类号： B01J21/04 ,  B01J23/06 ,  B01J23/20 ,  B01J23/62 ,  B01J23/70 ,  B01J27/12 ,  C07B61/00 ,  C07C17/20 ,  C07C19/08 ,  C07C17/08

    CPC分类号： C07C17/206

    摘要： A process for the production of difluoromethane comprising (a) contacting dichloromethane with hydrogen fluoride in the presence of a fluorination catalyst to produce a product stream comprising difluoromethane, monochloromonofluoromethane and unreacted starting materials and (b) separating difluoromethane from the product stream from step (a), wherein sufficient hydrogen fluoride is employed in the process such that during step (b) the molar ratio of hydrogen fluoride to monochloromonofluoromethane is at least about 100:1.

    摘要翻译： PCT No.PCT / GB94 / 00497 Sec。 371日期：1995年9月6日 102（e）日期1995年9月6日PCT 1994年3月14日PCT公布。 公开号WO94 / 21579 日本公报1994年9月29日制造二氟甲烷的方法，包括（a）在氟化催化剂存在下使二氯甲烷与氟化氢接触，生成包含二氟甲烷，一氯一氟甲烷和未反应的原料的产物流，和（b）从产物中分离二氟甲烷 其中在该方法中使用足够的氟化氢，使得在步骤（b）期间氟化氢与一氯一氟甲烷的摩尔比为至少约100:1。

    Silicone composition and silicone pressure sensitive adhesive
    10.
    发明授权
    Silicone composition and silicone pressure sensitive adhesive 有权
    硅胶组合物和硅胶压敏胶

    公开(公告)号：US06201055B1

    公开(公告)日：2001-03-13

    申请号：US09266307

    申请日：1999-03-11

    申请人： Michael Andrew Lutz ,  Andrew Anthony Mojica ,  Michael John Watson

    发明人： Michael Andrew Lutz ,  Andrew Anthony Mojica ,  Michael John Watson

    IPC分类号： C08K336

    CPC分类号： C09J183/04 ,  C08L83/00 ,  C08L2666/28 ,  C08L2666/54

    摘要： A silicone composition for preparing a silicone pressure sensitive adhesive, the composition comprising (A) 20 to 55 parts by weight of a polydiorganosiloxane containing an average of at least two silicon-bonded alkenyl groups per molecule; (B) 45 to 80 parts by weight of an organopolysiloxane resin consisting essentially of R33 SiO1/2 units and SiO4/2 units, wherein the total amount of components (A) and (B) is 100 parts by weight; (C) an organohydrogenpolysiloxane having an average of at least two silicon-bonded hydrogen atoms per molecule in an amount sufficient to cure the composition; (D) 25 to 200 parts by weight of a silica filler having an average surface area less than 25 m2/g; and (E) a catalytic amount of a hydrosilylation catalyst. Each R3 is independently selected from the group consisting of monovalent hydrocarbon and monovalent halogenated hydrocarbon groups. The mole ratio of R33SiO1/2 units to SiO4/2 units in the organopolysiloxane resin is from 0.6:1 to 1.5:1 and the resin contains less than about 2 mole percent of alkenyl groups. The sun of the average number of silicon-bonded alkenyl groups per molecule in component (A) and the average number of silicon-bonded hydrogen atoms per molecule in component (C) is greater than 4. A silicone pressure sensitive adhesive comprising a reaction product of the above-described composition. A multi-part silicone composition comprising components (A) through (E) in two or more parts, provided neither component (A) nor component (B), when component (B) contains alkenyl groups, are present with components (C) and (E) in the same part.

    摘要翻译： 一种用于制备硅氧烷压敏粘合剂的硅氧烷组合物，该组合物包含（A）每分子含有平均至少两个硅键合链烯基的聚二有机硅氧烷20至55重量份; （B）45〜80重量份基本上由R33 SiO1 / 2单元和SiO4 / 2单元组成的有机聚硅氧烷树脂，其中组分（A）和（B）的总量为100重量份; （C）每分子平均具有至少两个与硅键合的氢原子的有机氢聚硅氧烷，其量足以固化该组合物; （D）25〜200重量份平均表面积小于25m 2 / g的二氧化硅填料; 和（E）催化量的氢化硅烷化催化剂。 每个R 3独立地选自一价烃和一价卤代烃基。 有机聚硅氧烷树脂中R33SiO1 / 2单元与SiO4 / 2单元的摩尔比为0.6:1至1.5:1，并且树脂含有小于约2摩尔％的烯基。 组分（A）中每分子的硅键合烯基的平均数目和组分（C）中每分子的硅键合氢原子的平均数目的太阳大于4.一种包含反应产物的硅氧烷压敏粘合剂 的上述组合物。 当组分（B）含有烯基时，组分（A）至组分（E）分两部分或多份组分（A）和组分（B）均不含组分（C）和 （E）同一部分。