US4330639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer blend composition for forming polyethylene film
Assignee: Eneos Corp
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Filing: 1980-12-22
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Granted: 1982-05-18
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Expires: 2000-12-22
Abstract
Abstract Provided is a polymer composition for forming polyethylene film comprising an ethylene/C 3 -C 8 α-olefin copolymer having an intrinsic viscosity of 1.3 to 8.7 dl/g determined in decalin at 135° C. and a density of 0.850 to 0.930 and an ethylene polymer having a melt index of 0.01 to 0.2, a flow parameter of 1.9 to 2.8 and a density not lower than 0.940.
Inventors
- 👤 Kazuo Matsuura
- 👤 Noboru Yamaoka
- 👤 Shinichi Yanahashi
- 👤 Mituji Miyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:30
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/16; C08F4/00; C08F4/02; C08F4/022; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0807; C08L23/0815; C08L2205/00; C08L2205/02; C08L23/06; C08L2314/00; C08L2314/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
157 words
A polymer composition for forming polyethylene film comprising an ethylene/C 3 -C 8 α-olefin copolymer, said copolymer having been prepared by copolymerizing ethylene and a C 3 -C 8 α-olefin in a substantially solvent free vapor phase condition and in the presence of a catalyst which is an organoaluminum compound and a solid substance, said solid substance being a magnesium containing inorganic solid carrier and at least one member selected from the group consisting of a titanium compound and a vanadium compound; said copolymer being further characterized as having an intrinsic viscosity of 1.3 to 8.7 dl/g determined in decalin at 135° C. and a density of 0.850 to 0.904; said copolymer being mixed with an ethylene polymer having a melt index of 0.01 to 0.2, a flow parameter of 1.9 to 2.8 and a density of at least 0.940, the weight percent ratio of said copolymer to said polymer being from 0.1 to 40:99.9 to 60.
Claim 2
Dependent Claim
157 words
A polymer composition for forming polyethylene film comprising an ethylene/C 3 -C 8 α-olefin copolymer, said copolymer having been prepared by copolymerizing ethylene and a C 3 -C 8 α-olefin in a substantially solvent free vapor phase condition and in the presence of a catalyst which is an organoaluminum compound and a solid substance, said solid substance being a magnesium containing inorganic solid carrier and at least one member selected from the group consisting of a titanium compound and a vanadium compound; said copolymer being further characterized as having an intrinsic viscosity of 1.3 to 8.7 dl/g determined in decalin at 135° C. and a density of 0.850 to 0.904; said copolymer being mixed with an ethylene polymer having a melt index of 0.01 to 0.2, a flow parameter of 1.9 to 2.8 and a density of at least 0.940, the weight percent ratio of said copolymer to said polymer being from 0.1 to 40:99.9 to 60.
Claim 3
Dependent Claim
29 words
The composition as defined in claim 1, in which the mixing ratio (weight percent) of said copolymer (1) and said ethylene polymer (2) is (1):(2)=1 to 30:99 to 70.
Claim 4
Dependent Claim
74 words
A film comprising an ethylene/C 3 -C 8 α-olefin copolymer having an intrinsic viscosity of 1.3 to 8.7 dl/g determined in decalin at 135° C. and a density of 0.850 to 0.904 and an ethylene polymer having a melt index of 0.01 to 0.2, a flow parameter of 1.9 to 2.8 and a density of at least 0.940 the weight percent ratio of said copolymer to polymer being from 0.1 to 40:99.9 to 60.
Claim 5
Dependent Claim
74 words
A film comprising an ethylene/C 3 -C 8 α-olefin copolymer having an intrinsic viscosity of 1.3 to 8.7 dl/g determined in decalin at 135° C. and a density of 0.850 to 0.904 and an ethylene polymer having a melt index of 0.01 to 0.2, a flow parameter of 1.9 to 2.8 and a density of at least 0.940 the weight percent ratio of said copolymer to polymer being from 0.1 to 40:99.9 to 60.
Claim 6
Dependent Claim
78 words
The film as defined in claim 3, in which said copolymer is a copolymer prepared by copolymerizing ethylene and an α-olefin of C 3 to C 8 in a substantially solvent-free vapor phase condition and in the presence of a catalyst, said catalyst comprising a solid substance and an organoaluminum compound, which solid substance contains a magnesium-containing inorganic solid carrier and at least one member selected from the group consisting of a titanium compound and a vanadium compound.
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) | 1985-05-17 | 1985-11-16 | 1986-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-17 | 1989-11-16 | 1990-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-17 | 1993-11-16 | 1994-05-18 | $7700.00 | Window Closed / Lapsed |