US4440911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified polyethylene and laminate thereof
Assignee: Tonen General Sekiyu KK
•
Filing: 1982-03-18
•
Granted: 1984-04-03
•
Expires: 2002-03-18
Abstract
Abstract A linear low density polyethylene (a copolymer of ethylene and alpha-olefin) reacted with a carboxylic acid is disclosed. Laminates and compositions employing the modified polyethylene and/or synthetic rubber are also disclosed.
Inventors
- 👤 Hiroshi Inoue
- 👤 Masaaki Isoi
- 👤 Kazuo Sei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:59
CPC Classifications
B; B32; B32B; B32B25/00; B32B25/18; C; C08; C08F; C08F255/00; C08F255/02; B32B15/00; B32B15/04; B32B15/043; C08L; C08L51/00; C08L51/06; B32B2262/00; B32B2262/02; B32B2262/0276; B32B2262/0284; B32B2323/00; B32B2323/04; B32B2323/046; B32B2323/16; B32B2367/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
101 words
A fabricable thermoplastic composition which comprises linear low density copolymer of ethylene and an alpha-olefin wherein said alpha-olefin is selected from the group consisting of butene-1, hexene-1, methyl pentene-1, and octene-1 and comprises between 3 and 14 weight percent of the copolymer, said copolymer being reacted with from 0.01 to 3 wt. % of an unsaturated carboxylic acid or a derivative thereof, based on the weight of the copolymer, said linear low density copolymer being substantially free of long chain branching and having a density of 0.915 to 0.935 and the weight-average molecular weight/number-average molecular weight ratio from 3 to 12.
Claim 2
Dependent Claim
101 words
A fabricable thermoplastic composition which comprises linear low density copolymer of ethylene and an alpha-olefin wherein said alpha-olefin is selected from the group consisting of butene-1, hexene-1, methyl pentene-1, and octene-1 and comprises between 3 and 14 weight percent of the copolymer, said copolymer being reacted with from 0.01 to 3 wt. % of an unsaturated carboxylic acid or a derivative thereof, based on the weight of the copolymer, said linear low density copolymer being substantially free of long chain branching and having a density of 0.915 to 0.935 and the weight-average molecular weight/number-average molecular weight ratio from 3 to 12.
Claim 3
Dependent Claim
24 words
A thermoplastic composition as defined in claim 1 wherein the alpha-olefin comprises from 3 to 14 weight percent of the linear low density polyethylene.
Claim 4
Dependent Claim
45 words
A thermoplastic composition as defined in claim 1 and further comprising blended therein an effective amount of a synthetic rubber to increase the environmental stress crack resistance of the composition, but not in excess of 30 weight percent based on the weight of the blend.
Claim 5
Dependent Claim
44 words
A thermoplastic composition as defined in claim 1 and further having therein an unmodified copolymer of ethylene and an alpha-olefin, said unmodified copolymer being substantially free of long chain branching, the weight ratio of the modified and unmodified copolymers ranging between 1/9 to 7/3.
Claim 6
Dependent Claim
17 words
A modified polyethylene as defined in claim 3 and further having therein a linear low density polyethylene.
Claim 7
Dependent Claim
144 words
A fabricable thermoplastic composition which comprises a blend of (A) a modified ethylene copolymer comprising from 97 to 86 wt.% ethylene and 3 to 14 wt. % of an alpha-olefin, said copolymer being reacted with from 0.01 to 3 wt.% based on the weight of the modified copolymer of an unsaturated carboxylic acid or a derivative thereof, said ethylene copolymer being a copolymer of ethylene and alpha-olefin selected from the group consisting of butene-1, hexene-1, methyl-pentene-1, and octene-1 and having a density of 0.915 to 0.935 and the weight-average molecular weight/number-average molecular weight ratio from 3 to 12, and being substantially free of long chain branching; and (B) synthetic rubber, the concentration of the synthetic rubber being sufficient to substantially increase the environmental stress crack resistance of the modified polyethylene, but not in excess of 30 wt% based on the weight of the composition.
Claim 8
Dependent Claim
144 words
A fabricable thermoplastic composition which comprises a blend of (A) a modified ethylene copolymer comprising from 97 to 86 wt.% ethylene and 3 to 14 wt. % of an alpha-olefin, said copolymer being reacted with from 0.01 to 3 wt.% based on the weight of the modified copolymer of an unsaturated carboxylic acid or a derivative thereof, said ethylene copolymer being a copolymer of ethylene and alpha-olefin selected from the group consisting of butene-1, hexene-1, methyl-pentene-1, and octene-1 and having a density of 0.915 to 0.935 and the weight-average molecular weight/number-average molecular weight ratio from 3 to 12, and being substantially free of long chain branching; and (B) synthetic rubber, the concentration of the synthetic rubber being sufficient to substantially increase the environmental stress crack resistance of the modified polyethylene, but not in excess of 30 wt% based on the weight of the composition.
Claim 9
Dependent Claim
21 words
A composition as defined in claim 6 wherein the composition further includes a an unmodified copolymer of ethylene and an alpha-olefin.
Claim 10
Dependent Claim
25 words
A composition as defined in claim 6 wherein the synthetic rubber is selected from the group consisting of ethylene-alpha-butene-1 copolymer rubber and styrene-butadiene thermoplastic rubber.
Claim 11
Dependent Claim
27 words
A composition as defined in claim 6 wherein the synthetic rubber has a Mooney viscosity of 10 to 150 and a crystallization degree of less than 30%.
Claim 12
Dependent Claim
19 words
A composition as claimed in claim 6 wherein the synthetic rubber is a copolymer rubber of ethylene and butene-1.
Claim 13
Dependent Claim
22 words
A modified thermoplastic composition as defined in claim 1 wherein the linear low density copolymer is produced by a gas phase process.
References Cited (Backward Citations)
US3236917A
Cited
US3849516A
Cited
US3966845A
Cited
US3873643A
Cited
US3928497A
Cited
US3953541A
Cited
US4134927A
Cited
US4198327A
Cited
US4198327B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-03 | 1987-10-03 | 1988-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-03 | 1991-10-03 | 1992-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-03 | 1995-10-03 | 1996-04-03 | $7700.00 | Window Closed / Lapsed |