Claims
- 1. An extruded article formed by the extrusion of a syndiotactic propylene homopolymer having a syndiotactic pentad fraction of at least 0.7.
- 2. An extruded article formed by the extrusion of a syndiotactic propylene copolymer whose peak intensity observed at about 20.2 ppm on a 13C-NMR absorption spectrum as measured in the form of a 1,2,4-trichlorobenzene solution while using tetramethylsilane as a standard is at least 0.5 of the sum of all peak intensities corresponding to the respective methyl groups of propylene.
- 3. The extruded article of claim 2, which is a film or sheet having a thickness of 0.005-5 mm.
- 4. The extruded article of claim 2, which is a blown film having a thickness of 0.001-1 mm.
- 5. The extruded article of claim 2, wherein the propylene copolymer contains not more than 20 wt. % of olefin units other than propylene units, said olefin units containing 2-25 carbon atoms.
- 6. A blown film 0.001-1 mm thick formed by extruding, in a cylindrical form, polypropylene having a syndiotactic pentad fraction of at least 0.7 and blowing an inert gas into the cylindrical extrudate.
- 7. A sheet 0.005-5 mm thick formed by extrusion of polypropylene having a syndiotactic pentad fraction of at least 0.7.
- 8. A syndiotactic propylene copolymer comprising 70 to 99 mole % of propylene and 1 to 30 mole % of an olefin other than propylene wherein in the 13C-NMR spectrum of said syndiotactic propylene copolymer, said copolymer exhibits a ratio of the intensity of a peak at about 20.2 ppm to the sum of the intensities of the total peaks attributable to methyl groups in propylene units at about 19-22 ppm of 0.3 or more.
- 9. A syndiotactic propylene copolymer according to claim 8, wherein said olefin other than propylene is an α-olefin having 2 or 4 to 25 carbon atoms.
- 10. A syndiotactic propylene copolymer according to claim 9, comprising 73 to 99 mole % of propylene and 1 to 27 mole % of ethylene wherein in the 13C-NMR spectrum of said syndiotactic propylene copolymer, said copolymer exhibits a ratio of the intensity of a peak at about 20.2 ppm to the sum of the intensities of the total peaks attributable to methyl groups in propylene units at about 19-22 ppm of 0.5 or more.
- 11. A syndiotactic propylene copolymer according to claim 9, comprising 76 to 99 mole % of propylene and 1 to 24 mole % of butene wherein in the 13C-NMR spectrum of said syndiotactic propylene copolymer, said copolymer exhibits a ratio of the intensity of a peak at about 20.2 ppm to the sum of the intensities of the total peaks attributable to methyl groups in propylene units at about 19-22 of 0.5 or more.
- 12. A syndiotactic propylene copolymer according to claim 9, comprising 82 to 99 mole % of propylene and 1 to 18 mole % of 4-methylpentene-1 wherein in the 13C-NMR spectrum of said syndiotactic propylene copolymer, said copolymer exhibits a ratio of the intensity of a peak at about 20.2 ppm to the sum of the intensities of the total peaks attributable to methyl groups in propylene units at about 19-22 ppm of 0.5 or more.
- 13. A syndiotactic propylene copolymer according to claim 9, comprising 84 to 99 mole % of propylene and 1 to 16 mole % of hexene-1 wherein in the 13C-NMR spectrum of said syndiotactic propylene copolymer, said copolymer exhibits a ratio of the intensity of a peak at about 20.2 ppm to the sum of the intensities of the total peaks attributable to methyl groups in propylene units at about 19-22 ppm of 0.5 or more.
- 14. A syndiotactic propylene copolymer according to claim 9, comprising 1 to 29 mole % of ethylene, 1 to 14 mole % of butene and the balance of propylene.
- 15. A syndiotactic propylene copolymer according to claim 9, comprising 1 to 30 mole % of ethylene, 1 to 10 mole % of an α-olefin having 6 carbon atoms and the balance of propylene.
- 16. A process for the preparation of the copolymer of claim 11 comprising the polymerization of propylene and butene with catalysts obtained from isopropyl (cyclopentadienyl-1-fluorenyl) hafnium dichloride or isopropyl (cyclopentadienyl-1-fluorenyl) zirconium dichloride and polymethylaluminoxane cyclic or linear compounds of the formula where n is at least 5, operating under conditions where the ratio of butene to the total constitutional monomer units of the copolymer is from 1 to 24 mole %, and the polymerization is conducted in the liquid phase, at a temperature of from −100° C. to 100° C.
Priority Claims (9)
Number |
Date |
Country |
Kind |
1-107490 |
Apr 1989 |
JP |
|
1-137402 |
Jun 1989 |
JP |
|
1-205785 |
Aug 1989 |
JP |
|
1-205786 |
Aug 1989 |
JP |
|
1-216060 |
Aug 1989 |
JP |
|
1-216061 |
Aug 1989 |
JP |
|
1-241910 |
Sep 1989 |
JP |
|
1-278619 |
Oct 1989 |
JP |
|
1-304683 |
Nov 1989 |
JP |
|
Parent Case Info
This is a continuation-in-part of U.S. application Ser. No. 07/995,908 filed Dec. 22, 1992, abandoned, which application is a continuation of U.S. application Ser. No. 07/513,851, filed Apr. 24, 1990, abandoned, which is herein incorporated by reference in its entirety; and a continuation-in-part of U.S. application Ser. No. 07/956,457 filed Oct. 2, 1992, abandoned, which application is a continuation of U.S. application Ser. No. 07/568,054, filed Aug. 16, 1990, abandoned, which is herein incorporated by reference in its entirety.
US Referenced Citations (8)
Foreign Referenced Citations (9)
Number |
Date |
Country |
3726067 |
Feb 1989 |
DE |
0 195 505 |
Sep 1986 |
EP |
0 249 342 |
Sep 1986 |
EP |
62-119212 |
May 1987 |
JP |
1501950 |
Jul 1989 |
JP |
1502036 |
Jul 1989 |
JP |
WO 8805793 |
Aug 1988 |
WO |
WO 8805792 |
Aug 1988 |
WO |
0 351 392 |
Jan 1990 |
WO |
Non-Patent Literature Citations (2)
Entry |
Journal of the American Chemical Society, vol. 110, 1988, pp. 6255-6256, American Chemical Society; J.A. Ewen et al. |
*English translation furnished. |
Continuations (2)
|
Number |
Date |
Country |
Parent |
07/568054 |
Aug 1990 |
US |
Child |
07/956457 |
|
US |
Parent |
07/513851 |
Apr 1990 |
US |
Child |
07/568054 |
|
US |
Continuation in Parts (2)
|
Number |
Date |
Country |
Parent |
07/995908 |
Dec 1992 |
US |
Child |
08/182348 |
|
US |
Parent |
07/956457 |
Oct 1992 |
US |
Child |
07/995908 |
|
US |