US4046837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester-polyolefin blend film or coating composition
Assignee: Eastman Chemical Co
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Filing: 1976-11-05
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Granted: 1977-09-06
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Expires: 1996-11-05
Abstract
Abstract Poly(tetramethylene terephthalate) having an inherent viscosity of from about 0.6 to about 1.4 is modified by the addition of from about 5 to about 35 percent by weight of polyethylene having a density of about 0.918 gm./cc. and a melt index from about 0.1 to about 10.0 to provide an extrusion film or coating composition especially for the coating of substrates at very high line speeds, while resulting in consistent coating characteristics.
Inventors
- 👤 Max L. Carroll, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:12
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31786; Y10T428/3179
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
77 words
The composition comprising a blend of poly(tetramethylene terephthalate) having an inherent viscosity in ml./g. of from about 0.6 to about 1.4, with from about 5 to about 35 percent by weight of polyethylene having a density of about 0.918 gm./cc. and a melt index of from about 0.1 to about 10.0, said blend having a flow rate of from about 10 to about 30 gm./10 min. as determined as ASTM D1238 at 250° C. and 2.16 kg.
Claim 2
Dependent Claim
77 words
The composition comprising a blend of poly(tetramethylene terephthalate) having an inherent viscosity in ml./g. of from about 0.6 to about 1.4, with from about 5 to about 35 percent by weight of polyethylene having a density of about 0.918 gm./cc. and a melt index of from about 0.1 to about 10.0, said blend having a flow rate of from about 10 to about 30 gm./10 min. as determined as ASTM D1238 at 250° C. and 2.16 kg.
Claim 3
Dependent Claim
19 words
The composition of claim 1 wherein the polyethylene content is from about 15 to about 25 percent by weight.
Claim 4
Dependent Claim
8 words
A film of the composition of claim 1.
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) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |