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    65.
    发明专利
    未知

    公开(公告)号：BR9705206A

    公开(公告)日：1999-12-14

    申请号：BR9705206

    申请日：1997-10-31

    Applicant: HOECHST AG

    Inventor： WINTER ANDREAS ,  ZENK ROLAND DR ,  FRAAIJE VOLKER DR ,  KUEBER FRANK DR

    IPC: C07F17/00 ,  C08F4/639 ,  C08F4/642 ,  C08F4/643 ,  C08F4/659 ,  C08F4/6592 ,  C08F4/76 ,  C08F10/00

    Abstract: Metallocenes of formula (I) are claimed, in which M = a Group IVb, Vb or VIb metal; R , R = H, 1-40C hydrocarbon group such as 1-10C alkyl or alkoxy, 2-10C alkenyl, 6-10C aryl or aryloxy, 7-40C aralkyl or alkaryl, or 8-40C aralkenyl, OH or halogen; R , R = H, halogen, 1-20C hydrocarbon group such as 1-10C alkyl, 2-10C alkenyl or 6-10C aryl, or N(R )2, SR , OSi(R )3, Si(R )3 or P(R )2 (with R = halogen, 1-10C alkyl or 6-10C aryl); R = a bridging group such as -A-, -A-A-, -Q-Q-, -O-A-O-, -Q-, -O-A-, -Q-A-, -Q-Q-Q-, =BR , =AlR , -Ge-, -O-, -S-, =SO, =SO2, =NR , =CO, =PR or =P(O)R ; A = -M R R -; Q = -CR R -; R , R = H, halogen, or a 1-40C carbon-containing group such as SiR3, NR2 or BR2 (with R = 1-10C alkyl or 6-20C aryl), 1-10C alkyl, fluoroalkyl or alkoxy, 6-20C aryl of fluoroaryl, 2-10C alkenyl, 7-40C aralkyl or alkaryl, or 8-40C aralkenyl, or R + R may form a ring with the linking atoms; M = Si , Ge or Sn; z = 0 or 1; Rx, Ry = -(CR 2)l-(CR =CR )m-(CR 2)n-(CR =CR )o-(CR 2)p- in which R -R = as for R and R ; l + m + n + o + p = 2-6; l + n + p = at least 1; l, m, n, o, p = 0, 1, 2, 3 or 4; at least one of the indices m or o is not zero; the combination m = 0, o = 0 and l + n + p = 4, and the combination l = 0, n = 0, p = 0 and m + o = 2 are excluded. Also claimed is (i) a process for the production of (I), (ii) a catalyst containing (a) metallocene(s) (I) and (b) cocatalyst(s), and (iii) a process for the production of polyolefins in presence of these catalysts.

    68.
    发明专利
    未知

    公开(公告)号：BR9602576A

    公开(公告)日：1998-10-06

    申请号：BR9602576

    申请日：1996-05-31

    Applicant: HOECHST AG

    Inventor： BUSCH DETLEF ,  DRIES THOMAS ,  SCHLOEGL GUNTER ,  PEIFFER HERBERT ,  WINTER ANDREAS ,  SCHUHMANN DETLEF

    IPC: B29C47/06 ,  B29C55/12 ,  B29K23/00 ,  B29L7/00 ,  B32B27/18 ,  B32B27/32 ,  C08F8/00 ,  C08F10/06 ,  C08J5/18 ,  C08L23/10

    Abstract: Biaxially oriented polypropylene (BOPP) film with at least one base layer (A) contg. polypropylene (PP) is claimed, in which (a) the isotactic block length of the PP between two structural defects is more than 40 (statistical average); (b) the n-heptane- insol. component of the PP has an isotacticity (by C-NMR spectrometry) of at least 95%; and (c) the PP has a mol. wt. ratio Mw/Mn of less than 4 and contains less than 1% n-heptane-soluble component. Sealable film of this type has a gloss value of more than 90, pref. more than 105, and an opacity of less than 2.5, pref. less than 2.0. Non-sealable BOPP film has a gloss value of more than 120, pref. more than 130, and an opacity of less than 2.0, pref. less than 1.8. Also claimed is a process for the prodn. of this BOPP film, by (i) heating, compressing and melting the polymers for the different layers in extruders; (ii) combining the different melts; (iii) extruding through a sheet die; (iv) cooling and compacting the film on a take-off roll; and (v) orienting the film by stretching in the machine direction by a factor of (3:1)-(9:1) and in the transverse direction by a factor of (4:1)-(12:1).

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