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    Preparation of methallylsilanes
    32.
    发明授权
    Preparation of methallylsilanes 失效
    甲基硅烷的制备

    公开(公告)号：US3631085A

    公开(公告)日：1971-12-28

    申请号：US3631085D

    申请日：1970-03-23

    Applicant: DOW CORNING

    Inventor： KRAHNKE ROBERT H ,  MICHAEL KEITH W ,  PLUEDDEMANN EDWIN P

    IPC: C07F7/18 ,  C07F7/08

    CPC classification number: C07F7/0801

    Abstract: THE PREPARATION OF METHALLYLSILANES WHICH INVOLVES CONTACTING (IN AN OPEN SYSTEM) A HYDROGEN-SUBSTITUTED ORGANOSILICON COMPOUND WITH DIISOBUTYLENE, AT A TEMPERATURE OF FROM 400*C, TO 600*C. THE PRESENT METHOD IS LESS DIFFICULT (AND THUS LESS EXPENSIVE) THAN PRIOR ART METHODS AND THE RECOVERED METHALLYLSILANES ARE USEFUL IN THE PRODUCTION OF CERTAIN SYNTHETIC RESINS.

    Alkoxyalkarylsilanes and condensates thereof
    36.
    发明授权
    Alkoxyalkarylsilanes and condensates thereof 失效
    烷氧基硅烷及其混合物

    公开(公告)号：US3427340A

    公开(公告)日：1969-02-11

    申请号：US3427340D

    申请日：1966-02-01

    Applicant: DOW CORNING

    Inventor： PLUEDDEMANN EDWIN P

    IPC: C07F7/08 ,  C07F7/12 ,  C07F7/18 ,  C08G77/14 ,  C08G47/00

    CPC classification number: C07F7/182 ,  C07F7/0834 ,  C07F7/12 ,  C08G77/14

    Abstract: 1,180,601. Alkoxyalkylarylsilanes and siloxanes. DOW CORNING CORP. 10 Jan., 1967 [1 Feb., 1966(2)], No. 1325/67. Headings C3S and C3T. The invention comprises silanes of the general formula XnR 1 3-n SiQ m ArCH 2 OR and condensates thereof which are polymers of the average general formula, where R is a lower alkyl radical with 1-4 C atoms, Q is an alkylene radical, Ar is a divalent arylene radical or a divalent aryl ether radical, X is a hydroxyl radical or a hydrolysable atom or radical, R 1 is a monovalent hydrocarbon radical with not more than 18 C atoms, n is 1 to 3, m is 0 or 1, a has an average value of 1 to 3; b an average value of 0 to 2; (a + b) is from 1 to 3. The silanes of the invention may be prepared by three methods: (1) Reacting a silane of the general formula with RONa in a solvent such as methanol; (2) reacting a silane of the general formula X n R 1 3-n SiCl with a Grignard reagent prepared from ROCH 2 ArQ m ,Br; and (3) reacting X n R 1 3-n SiH with ROCH 2 ArQ 1 in the presence of chloroplatinic acid, where Q 1 is a monovalent aliphatic hydrocarbon radical which contains one unsaturated group. Preferably the silane comprises R 1 = Me, R = Me, X = OMe or Cl, Ar = C 6 H 4 , n = 3 and Q = -CH 2 -CH 2 -, e.g. CH 3 OCH 2 C 6 H 4 CH 2 CH 2 Si(OCH 3 ) 3 , which is prepared from ClCH 2 (CH 4 CH 2 CH 2 Si(OCH 3 ) 3 and NaOMe (method 1) in one of the examples. A silane CH 8 OCH 2 C 6 H 4 Si(OCH 3 ) 3 , having the further preferred characteristics n = 3, X = Cl or OMe, m = 0, Ar = C 6 H 4 , R = Me, is prepared by method 1 from the corresponding bromide and NaOMe and is hydrolysed to a siloxane of the unit formula The condensates are prepared by conventional hydrolysis of the silanes.

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