SILYL ORGANOMETALLOCENES USEFUL AS ANTIOXIDANTS

    公开(公告)号:CA963911A

    公开(公告)日:1975-03-04

    申请号:CA116375

    申请日:1971-06-23

    Applicant: GEN ELECTRIC

    Abstract: 1337311 Organometallocene-polysiloxanes GENERAL ELECTRIC CO 1 July 1971 [20 July 1970] 30824/71 Headings C3S and C3T [Also in Division C5] Novel silylcarbamylorganometallocene polymers having structural units of the formula optionally in admixture with further structural units of the formula wherein R denotes an unsubstituted or halogen-, nitro-, alkoxy- or cyano-substituted monovalent hydrocarbon radical, S denotes an organometallocene radical of the formula W denotes a carbamyl radical, R 11 denotes an alkylene or arylene radical, each Q is chemically bonded to a cyclopentadienyl radical and denotes hydrogen, a monovalent electron-donating organic radical selected from aryl, hydroxyaryl, aliphatic or cycloaliphatic hydrocarbon radicals, nitroaliphatic radicals, carboxyaliphatic radicals and triorganosilyl radicals, or a monovalent electron withdrawing organic radical selected from aliphatic acyl, arylacyl, carboxylic, aldehydic, sulpho, carboxyaryl, nitroaryl, haloaryl and haloaliphatic radicals, provided that at least one Q attached to each cyclopentadienyl radical denotes hydrogen, M denotes a transition metal bonded to two cyclopentadienyl radicals and is Ti, V, Cr, Mn, Fe, Co, Ni, Zr, Cb, Mo, Tc, Ru, Rh, Pd, Hf, Ta, W, Re, Os, Ir or Pt, a denotes 0, 1 or 2 and b denotes 0, 1, 2, or 3, are prepared by hydrolysis of metallocenyl halides of the formula S-W-R 11 -Si(R) a X 3-a optionally in admixture with halosilanes of the formula (R) b -SiX 4-b (wherein X denotes halogen). The metallocenyl halides may themselves be obtained by reacting an organometallocene of the formula SH with an isocyanate halide of the formula OCN-R 11 (R) a SiX) 3-a in the presence of a Lewis acid catalyst. Uses.-As high temperature antioxidants for polysiloxane fluids, particularly dimethylpolysiloxanes used as clutch fluids.

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