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    • 61. 发明授权
    • Process for the preparation of polyorganosiloxanes containing
unsaturated functions, by dehydrogenative condensation in the presence
of titanium, zirconium or hafnium
    • 制备含有不饱和官能团的聚有机硅氧烷的方法,通过在钛,锆或铪的存在下脱氢缩合
    • US5767217A
    • 1998-06-16
    • US617798
    • 1996-05-30
    • Robert ChoukrounJean-Marc FrancesFrederique Soleil
    • Robert ChoukrounJean-Marc FrancesFrederique Soleil
    • C07F7/00C07F7/08C07F7/28C08G77/06C08G77/08C08G77/12C08G77/20C08G77/38C08G77/385
    • C08G77/38C07F7/0881C08G77/385
    • Provided is a process for the preparation of polyorganosiloxanes containing unsaturated functions. A polyorganohydrogenosiloxane (A) containing at least 0.1 mol % of hydrogen atoms linked directly to the silicon is reacted with at least a stoichiometric amount of a hydrocarbon compound (B) having at least one ethylenic or acetylenic unsaturation, in the presence of a catalytically effective amount of a dehydrogenative condensation catalyst comprising a metal complex of formula (I): L.sub.n MR.sub.x Y.sub.y. M represents a metal chosen from titanium, zirconium and hafnium; the symbols L are the same or different and represent a hydrocarbon ligand of the metal M, the said ligand donating from 3 to 8 .pi.-electrons to the valence shell of the said metal; n is an integer ranging from 0 to 3; the symbols R are the same or different and represent a hydrocarbon or organosilicon ligand of the metal M, the ligand being a .sigma.-electron donor; the symbols Y are the same or different and represent a ligand which forms, with the metal M, a covalent bond; x is an integer ranging from 0 to 4; y is an integer ranging from 0 to 4; the respective values of the numbers n, x and y being such that the number of electrons in the valence shell of the completed metal M is less than or equal to 18, wherein at least one of n, x and y does not equal zero.
    • PCT No.PCT / FR94 / 01047 Sec。 371日期:1996年5月30日 102(e)日期1996年5月30日PCT 1994年9月6日PCT公布。 第WO95 / 07312号公报 日期1995年3月16日提供了制备含有不饱和官能团的聚有机硅氧烷的方法。 含有至少0.1mol%直接与硅连接的氢原子的聚有机基氢硅氧烷(A)与化学计量的至少一种具有至少一个烯属或不饱和不饱和键的烃化合物(B)在催化有效 含有式(I)金属络合物的脱氢缩合催化剂的量:LnMRxYy。 M表示选自钛,锆和铪的金属; 符号L相同或不同,表示金属M的烃配体,所述配体从3至8个π电子提供给所述金属的化合价; n为0〜3的整数; 符号R相同或不同,表示金属M的烃或有机硅配体,配体是σ电子供体; 符号Y相同或不同,表示与金属M形成共价键的配体; x是0〜4的整数; y为0〜4的整数; 数字n,x和y的相应值使得完成的金属M的化合价壳中的电子数小于或等于18,其中n,x和y中的至少一个不等于零。