Alkoxyalkarylsilanes and condensates thereof
    35.
    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

    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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