US3972964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating composition for polyethylene films comprising EPR and polybutene
Assignee: WR Grace and Co Conn
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Filing: 1975-03-07
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Granted: 1976-08-03
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Expires: 1995-03-07
Abstract
Abstract An improved polymeric composition comprising a blend of polybutene-1 with an ethylene-propylene copolymer which, when combined with a shrinkable, thermoplastic substrate, produces a laminate having improved abuse and tear resistance and reduced self-adherence.
Inventors
- 👤 Donald J. Doentremont
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:55
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/14; C08L23/142; B; B29; B29C; B29C48/00; B29C48/001; B29C48/0013; B29C48/0015; B29C48/0016; B29C48/03; B29C48/09; B29C48/16; B29C48/18; B29C48/21; B29C65/00; B29C65/02; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/70; B29C66/71; B29C66/72; B29C66/723; B29C48/10; B29C65/48; B29C65/4805; B29C65/481; B29C65/4815; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2023/0608; B29K2023/0633; B29K2023/10; B29K2023/12; B29K2031/00; B29K2031/04; B29K2105/00; B29K2105/0085; B29K2105/0088; B29L; B29L2031/00; B29L2031/712; B29L2031/7128; C08L23/18; C08L23/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
45 words
A blended thermoplastic coating composition consisting essentially of: a. a major portion which comprises a copolymer of ethylene and propylene, the ethylene constituent of said copolymer being present in the range of 2.5% to 10% by weight; and, b. a minor portion which comprises polybutene-1.
Claim 2
Dependent Claim
45 words
A blended thermoplastic coating composition consisting essentially of: a. a major portion which comprises a copolymer of ethylene and propylene, the ethylene constituent of said copolymer being present in the range of 2.5% to 10% by weight; and, b. a minor portion which comprises polybutene-1.
Claim 3
Dependent Claim
48 words
The coating composition of claim 1 wherein said major portion is in the range of 95% to 60% by weight; the ethylene constituent of the copolymer is in the range from 2.5% to 4.0%; and, the minor portion is in the range of 5% to 40% by weight.
Claim 4
Dependent Claim
34 words
The coating composition of claim 2 wherein said major portion is in the range from 70% to 80% by weight and said minor portion is in the range of 30% to 20% by weight.
Claim 5
Dependent Claim
30 words
The composition of claim 2 wherein said major portion is about 66%; the ethylene content is in the range from 2.5% to 3.0%; and the minor portion is about 34%.
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) | 1979-08-03 | 1980-02-02 | 1980-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-03 | 1984-02-02 | 1984-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-03 | 1988-02-02 | 1988-08-03 | $7700.00 | Window Closed / Lapsed |