Patent US5218071A successfully refreshed from Google Patents.
US5218071A
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Ethylene random copolymers
Assignee: Mitsui Chemicals Inc
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Filing: 1992-06-22
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Granted: 1993-06-08
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Expires: 2012-06-22
Abstract
Abstract In accordance with the present invention, there are provided ethylene copolymers composed of structural units (a) derived from ethylene and structural units (b) derived from alpha -olefin of 3 DIFFERENCE 20 carbon atoms, said ethylene copolymers having [A] a density of 0.85 DIFFERENCE 0.92 g/cm3, [B] an intrinsic viscosity [ eta ] as measured in decalin at 135 DEG C. of 0.1 DIFFERENCE 10 dl/g, [C] a ratio ( &upbar& Mw/ &upbar& Mn) of a weight average molecular weight ( &upbar& Mw) to a number average molecular weight ( &upbar& Mn) as measured by GPC of 1.2 DIFFERENCE 4, and [D] a ratio (MFR10/MFR2) of MFR10 under a load of 10 kg to MFR2 under a load of 2.16 kg at 190 DEG C. of 8 DIFFERENCE 50, and being narrow in molecular weight distribution and excellent in flowability.
Inventors
- 👤 Toshiyuki Tsutsui
- 👤 Ken Yoshitsugu
- 👤 Akinori Toyota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:44
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/04; C08F10/06; C08F210/00; C08F210/04; C08F210/08; C08F210/16; C08F110/00; C08F110/04; C08F110/06; C08F210/06; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/64; C08F4/659; C08F4/65912; C08F4/65916; C08F4/6592; C08F4/65922; C08F4/65927; Y; Y10; Y10S; Y10S526/00; Y10S526/943
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
121 words
In ethylene random copolymers composed of structural units (a) derived from ethylene and structural units (b) derived from α-olefin of 3 to 20 carbon atoms, the improvement which resides in that the ethylene copolymers have (A) a density of 0.85 to 0.91 g/cm 3 , (B) an intrinsic viscosity as measured in decahydronaphthalene at 135° C. of 0.1 to 10 dl/g, (C) a ratio (Mw/Mn) of a weight average molecule weight (Mw) to a number average molecular weight (Mn) as measured by PGC of 1.4 to 3.5, and (D) a ratio (MFR 10 /MFR 2 ) of MFR 10 under a load of 10 kg to MFR 2 under a load of 2.16 kg at 190° C. of 8.5 to 45.
Claim 2
Dependent Claim
121 words
In ethylene random copolymers composed of structural units (a) derived from ethylene and structural units (b) derived from α-olefin of 3 to 20 carbon atoms, the improvement which resides in that the ethylene copolymers have (A) a density of 0.85 to 0.91 g/cm 3 , (B) an intrinsic viscosity as measured in decahydronaphthalene at 135° C. of 0.1 to 10 dl/g, (C) a ratio (Mw/Mn) of a weight average molecule weight (Mw) to a number average molecular weight (Mn) as measured by PGC of 1.4 to 3.5, and (D) a ratio (MFR 10 /MFR 2 ) of MFR 10 under a load of 10 kg to MFR 2 under a load of 2.16 kg at 190° C. of 8.5 to 45.
Claim 3
Dependent Claim
16 words
The ethylene copolymer of claim 1 wherein said copolymer has density of 0.85-0.90 g/cm 3 .
Claim 4
Dependent Claim
30 words
The ethylene copolymers of claim 1 comprising (a) 60-96 mol% of structural units derived from ethylene and (b) 4-40 mol% of structural units derived from α-olefin containing 3-20 carbon atoms.
Claim 5
Dependent Claim
33 words
The ethylene copolymers of claim 1 wherein (a) 70-94 mol% of the structural units are derived from ethylene and (b) 6-30 mol% of structural units are derived from α-olefin containing 3-20 carbon atoms.
Claim 6
Dependent Claim
21 words
The ethylene copolymers of claim 1 wherein the intrinsic viscosity (η) as measured in decahydronaphthalene at 135° C. is 05-6 dl/g.
Claim 7
Dependent Claim
20 words
The ethylene copolymers of claim 1 wherein the molecular weight distribution Mw/Mn as measured by GPC is 1.5 to 3.0.
Claim 8
Dependent Claim
17 words
The ethylene copolymers of claim 1 wherein the ratio MFR 10 /MFR 2 is 9 to 40.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-06-07 | 1996-12-07 | 1997-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-07 | 2000-12-07 | 2001-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-07 | 2004-12-07 | 2005-06-08 | $7700.00 | Window Closed / Lapsed |