US3607987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating composition comprising polyethylene and a visbroken copolymer of ethylene and propylene
Assignee: Phillips Petroleum Co
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Filing: 1967-07-20
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Granted: 1971-09-21
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Expires: 1987-07-20
Abstract
Abstract A coating composition comprising a blend of a thermally cracked copolymer containing a major amount of propylene and a low density homopolymer of ethylene and a coating method.
Inventors
- 👤 Roger J Walton
- 👤 Royce G Cowan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:55
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/02; C09J123/10; C09J123/14; C09J123/142; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
84 words
The composition according to claim 1 wherein from about 75 to about 85 weight percent of the copolymer based on the total weight of the blend is employed, the visbroken copolymer has a melt flow of from about 50 to about 100, and from about 15 to about 25 weight percent of said homopolymer is employed based on the total weight of the blend, said homopolymer having a density in grams per cubic centimeter at 20* C. of from about 0.91 to about 0.93.
Claim 2
Dependent Claim
59 words
The composition according to claim 1 wherein said copolymer is visbroken by being thermally cracked by heating the copolymer at a temperature in the range of from about 600* to about 900* F. for a time sufficient to raise the melt flow of said copolymer from less than 40 into the range of from about 40 to about 110.
Claim 3
Dependent Claim
28 words
The composition according to claim 1 wherein said homopolymer has a melt index as determined by ASTM D 1238-62T, Condition E of from about 2 to about 10.
Claim 4
Dependent Claim
17 words
An article comprising a substrate and a coating thereon, said coating comprising the blend of claim 1.
Claim 5
Dependent Claim
13 words
The article according to claim 5 wherein said substrate comprises a paper product.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |