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    • 84. 发明授权
    • Method for purifying 3-methacryloxypropyldimethylhalosilanes and
3-methacryloxypropylmethyldihalosilanes
    • 3-甲基丙烯酰氧基丙基二甲基硅烷和3-甲基丙烯酰氧基丙基甲基二卤代硅烷的纯化方法
    • US5847178A
    • 1998-12-08
    • US982768
    • 1997-12-02
    • Tadashi Okawa
    • Tadashi Okawa
    • C07F7/12C07F7/20C07F7/08
    • C07F7/20
    • A method for purifying 3-methacryloxypropyldimethylhalosilanes or 3-methacryloxypropyl methyldihalosilanes which is characterized by the fact that 1-methyl-2-methacryloxyethyldimethyl halosilanes or 1-methyl-2-methacryloxyethylmethyldihalosilanes contained in products or fractions consisting of 3-methacryloxypropyldimethylhalosilanes or 3-methacryloxypropylmethyl dihalosilanes produced by a hydrosilation reaction of allyl methacrylate with dimethylhalosilanes or methyldihalosilanes are decomposed by means of at least one copper compound selected from the group consisting of copper hydroxides, copper salts other than copper halides, and copper oxides, after which these compounds are subjected to fractional distillation.
    • 3-甲基丙烯酰氧基丙基二甲基硅烷或3-甲基丙烯酰氧基丙基甲基二卤代硅烷的纯化方法,其特征在于1-甲基-2-甲基丙烯酰氧基乙基二甲基卤硅烷或1-甲基-2-甲基丙烯酰氧基乙基甲基二卤代硅烷,由3-甲基丙烯酰氧基丙基二甲基卤硅烷或3-甲基丙烯酰氧基丙基甲基二卤代硅烷 通过甲基丙烯酸烯丙酯与二甲基卤硅烷或甲基二卤代硅烷的硅氢化反应生成的化合物通过至少一种选自氢氧化铜,铜卤化物以外的铜盐和铜氧化物的铜化合物分解,然后将这些化合物进行分级 蒸馏。
    • 89. 发明授权
    • Method for the preparation of organopolysiloxanes
    • 制备有机聚硅氧烷的方法
    • US5567789A
    • 1996-10-22
    • US502447
    • 1995-07-14
    • Ryuko ManzoujiTadashi Okawa
    • Ryuko ManzoujiTadashi Okawa
    • C08G77/06C08G77/08
    • C08G77/08C08G77/06
    • A highly efficient method for preparing an organopolysiloxane which contains little low molecular weight organosiloxane is disclosed, said method comprising:(I) polymerizing(A) cyclic trisiloxane having the formula ##STR1## wherein R is a monovalent hydrocarbon radical, excluding aryl radical, using as a polymerization initiator(B) a lithium compound having the formula ##STR2## in which R' is independently selected from monovalent hydrocarbon radicals, X and X' are selected from the group consisting of hydrogen and lithium, with the proviso that one of X and X' must be lithium, and m is an integer having a value of at least 1, optionally, in the presence of(C) a molecular-weight regulator selected from the group consisting of water and a compound having the formula ##STR3## in which R' has its previously defined meaning and p is an integer having a value of at least 1,said polymerization taking place in the presence of both(D) a nitrile compound and(E) an active hydrogen-free polar solvent; and(II) terminating the polymerization reaction product from step (I) with a neutralizing agent selected from the group consisting of an acid and an organohalosilane.
    • 公开了一种制备含有少量低分子量有机硅氧烷的有机聚硅氧烷的高效方法,所述方法包括:(I)聚合(A)具有式“IMAGE”的环状三硅氧烷,其中R是除芳基之外的一价烃基,使用 作为聚合引发剂(B)具有式“IMAGE”的锂化合物,其中R'独立地选自一价烃基,X和X'选自氢和锂,条件是X中的一个 并且X'必须是锂,并且m是至少为1的整数,任选地,在(C)选自水和具有下式的化合物的分子量调节剂的存在下, 其中R'具有其先前定义的含义,p是具有至少1的值的整数,所述聚合在(D)腈化合物和(E)无活性氢的极性 溶剂; 和(II)用选自酸和有机卤代硅烷的中和剂终止步骤(I)的聚合反应产物。