Patent US5157092A successfully refreshed from Google Patents.
US5157092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer of 4-methylpentene-1
Assignee: Mitsui Chemicals Inc
•
Filing: 1990-06-11
•
Granted: 1992-10-20
•
Expires: 2010-06-11
Abstract
Abstract A polymer of 4-methylpentene-1 having a substantially syndiotactic structure, which polymer contains 0 to 30 mol % of the α-olefin unit other than the 4-methylpentene-1 unit and has excellent physical properties.
Inventors
- 👤 Tadashi Asanuma
- 👤 Tetsunosuke Shiomura
- 👤 Nobutaka Uchikawa
- 👤 Yukari Tamai
- 👤 Tateyo Sasaki
- 👤 Tutomu Iwatani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:11
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/14; C08F110/00; C08F110/14; C08F210/00; C08F210/16; Y; Y10; Y10S; Y10S526/00; Y10S526/902; Y10S526/943
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
133 words
A homopolymer of 4-methylpentene-1 having a substantially syndiotactic structure in which in a spectrum of 13 C-NMR measured as a 1,2,4-trichlorobenzene solution, a peak intensity observed at about 43.1 ppm on the basis of tetramethylsilane is at least 0.5 of the total of the peak intensities observed at about 42-44 ppm; the weight average molecular weight measured by gel permeation chromatography is 1,000 or more; and a maximum diffraction line is observed in a spacing of about 9 Å by X-ray diffraction; wherein a crystallization temperature measured by melting said polymer at 300° C. and then dropping its temperature at a rate of 10°/minute is 160° C. or more and wherein a ratio of the weight average molecular weight to the number average molecular weight of the polymer is from 1.5 to 20.
Claim 2
Dependent Claim
133 words
A homopolymer of 4-methylpentene-1 having a substantially syndiotactic structure in which in a spectrum of 13 C-NMR measured as a 1,2,4-trichlorobenzene solution, a peak intensity observed at about 43.1 ppm on the basis of tetramethylsilane is at least 0.5 of the total of the peak intensities observed at about 42-44 ppm; the weight average molecular weight measured by gel permeation chromatography is 1,000 or more; and a maximum diffraction line is observed in a spacing of about 9 Å by X-ray diffraction; wherein a crystallization temperature measured by melting said polymer at 300° C. and then dropping its temperature at a rate of 10°/minute is 160° C. or more and wherein a ratio of the weight average molecular weight to the number average molecular weight of the polymer is from 1.5 to 20.
Claim 3
Dependent Claim
51 words
A homopolymer according to claim 1 in which in a spectrum of 13 C-NMR measured in the state of a 1,2,4-trichlorobenzene solution, a peak intensity observed at about 43.1 ppm on the basis of tetramethylsilane is at least 0.5 of the total of the peak intensities observed at about 42.0-43.5 ppm.
Claim 4
Dependent Claim
95 words
A copolymer of 4-methylpentene-1 and another α-olefin having a substantially syndiotactic structure in which in a spectrum of 13 C-NMR measured as a 1,2,4-trichlorobenzene solution, a peak intensity of the 4-methylpentene-1 unit observed at about 43.1 ppm on the basis of tetramethylsilane is at least 0.3 of the total of the peak intensities of the 4-methylpentene-1 unit observed at about 42-44 ppm; the content of the α-olefin unit other than the 4-methylpentene-1 unit is from 0.1 to 30 mol%; and the intrinsic viscosity measured at 135° C. as a tetrahydronaphthalene solution is 0.05 or more.
Claim 5
Dependent Claim
95 words
A copolymer of 4-methylpentene-1 and another α-olefin having a substantially syndiotactic structure in which in a spectrum of 13 C-NMR measured as a 1,2,4-trichlorobenzene solution, a peak intensity of the 4-methylpentene-1 unit observed at about 43.1 ppm on the basis of tetramethylsilane is at least 0.3 of the total of the peak intensities of the 4-methylpentene-1 unit observed at about 42-44 ppm; the content of the α-olefin unit other than the 4-methylpentene-1 unit is from 0.1 to 30 mol%; and the intrinsic viscosity measured at 135° C. as a tetrahydronaphthalene solution is 0.05 or more.
Claim 6
Dependent Claim
24 words
A copolymer according to claim 3 wherein the α-olefin other than 4-methylpentene-1 is an straight-chain or branched α-olefin having 2 to 25 carbon atoms.
Claim 7
Dependent Claim
29 words
A copolymer according to claim 3 wherein a ratio of the weight average molecular weight to the number average molecular weight of the polymer is from 1.5 to 20.
Claim 8
Dependent Claim
14 words
A copolymer according to claim 4 wherein the straight-chain α-olefin is ethylene or propylene.
Claim 9
Dependent Claim
83 words
A copolymer of 4-methylpentene-1 and propylene in which in a spectrum of 13 C-NMR measured as a 1,2,4-trichlorobenzene solution, a peak intensity of the 4-methylpentene-1 unit observed at about 43.1 ppm on the basis of tetramethylsilane is at least 0.5 of the total of the peak intensities of the 4-methylpentene-1 unit observed at about 42.5-43.1 ppm; the content of propylene is from 0.1 to 20% by weight; and the intrinsic viscosity measured at 135° C. as a tetrahydronaphthalene solution is at least 0.05.
Claim 10
Dependent Claim
83 words
A copolymer of 4-methylpentene-1 and propylene in which in a spectrum of 13 C-NMR measured as a 1,2,4-trichlorobenzene solution, a peak intensity of the 4-methylpentene-1 unit observed at about 43.1 ppm on the basis of tetramethylsilane is at least 0.5 of the total of the peak intensities of the 4-methylpentene-1 unit observed at about 42.5-43.1 ppm; the content of propylene is from 0.1 to 20% by weight; and the intrinsic viscosity measured at 135° C. as a tetrahydronaphthalene solution is at least 0.05.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-20 | 1996-04-20 | 1996-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-20 | 2000-04-20 | 2000-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-20 | 2004-04-20 | 2004-10-20 | $7700.00 | Window Closed / Lapsed |