US4335224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer compositions comprising ethylene polymer blends
Assignee: Eneos Corp
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Filing: 1981-03-02
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Granted: 1982-06-15
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Expires: 2001-03-02
Abstract
Abstract Provided is a polymer composition having a melt index of 0.01 to 5.0 and a density of 0.880 to 0.940 prepared by blending 10 to 80 parts by weight of an ethylene/α-olefin copolymer having an intrinsic viscosity determined in decalin at 135° C. of 2.0 to 10 dl/g and a density of less than 0.91 which copolymer is obtained by copolymerizing ethylene with an α-olefin of C 3 to C 12 in vapor phase condition, with 20 to 90 parts by weight of an ethylene polymer having an intrinsic viscosity determined in decalin at 135° C. of not higher than 1.7 dl/g and a density not less than 0.950.
Inventors
- 👤 Kazuo Matsuura
- 👤 Noboru Yamaoka
- 👤 Sinichi Yanahashi
- 👤 Katumi Usui
- 👤 Mituji Miyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:31
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/08; C08L23/0807; C08L23/0815; C08L2205/00; C08L2205/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
140 words
A polymer composition having a melt index of 0.01 to 5.0 and a density of 0.880 to 0.940, said polymer composition comprising a blend of: (1) 45 to 70 parts by weight of an ethylene/α-olefin copolymer having an intrinsic viscosity determined in decalin at 135° C. of 2.0 to 10 dl/g and a density of 0.850 to 0.905 which copolymer is obtained by copolymerizing ethylene with an α-olefin having 3 to 12 carbon atoms in a substantially solvent-free vapor phase condition and in the presence of a catalyst comprising a solid substance and an organoaluminum compound, said solid substance containing magnesium and titanium and/or vanadium, and (2) 55 to 30 parts by weight of an ethylene polymer having an intrinsic viscosity determined in decalin at 135° C. of not higher than 1.7 dl/g and a density not less than 0.950.
Claim 2
Dependent Claim
140 words
A polymer composition having a melt index of 0.01 to 5.0 and a density of 0.880 to 0.940, said polymer composition comprising a blend of: (1) 45 to 70 parts by weight of an ethylene/α-olefin copolymer having an intrinsic viscosity determined in decalin at 135° C. of 2.0 to 10 dl/g and a density of 0.850 to 0.905 which copolymer is obtained by copolymerizing ethylene with an α-olefin having 3 to 12 carbon atoms in a substantially solvent-free vapor phase condition and in the presence of a catalyst comprising a solid substance and an organoaluminum compound, said solid substance containing magnesium and titanium and/or vanadium, and (2) 55 to 30 parts by weight of an ethylene polymer having an intrinsic viscosity determined in decalin at 135° C. of not higher than 1.7 dl/g and a density not less than 0.950.
Claim 3
Dependent Claim
37 words
The composition as defined in claim 1, in which said ethylene/α-olefin copolymer (1) is obtained by the vapor phase polymerization using said catalyst, said catalyst being treated with an α-olefin in advance of the vapor phase polymerization.
Claim 4
Dependent Claim
33 words
The composition as defined in claim 1, in which the intrinsic viscosity of said ethylene/α-olefin copolymer (1) determined in decalin at 135° C. is in the range of from 2.5 to 8.5 dl/g.
Claim 5
Dependent Claim
33 words
The composition as defined in claim 1, in which the intrinsic viscosity of said ethylene/α-olefin copolymer (1) determined in decalin at 135° C. is in the range of from 3.0 to 8.0 dl/g.
Claim 6
Dependent Claim
33 words
The composition as defined in claim 1, in which the intrinsic viscosity of said ethylene polymer (2) determined in decalin at 135° C. is in the range of from 0.2 to 1.7 dl/g.
Claim 7
Dependent Claim
25 words
The composition as defined in claim 1, in which the density of said ethylene polymer (2) is in the range of from 0.950 to 0.980.
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) | 1985-06-14 | 1985-12-14 | 1986-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-14 | 1989-12-14 | 1990-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-14 | 1993-12-14 | 1994-06-15 | $7700.00 | Window Closed / Lapsed |