US3678069A
Expired / Lapsed
US
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Lactone polymerization with a dicarboxylic acid-water initiator
Assignee: Phillips Petroleum Co
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Filing: 1968-12-04
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Granted: 1972-07-18
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Expires: 1988-12-04
Abstract
Abstract Lactones having the formula: WHEREIN N IS AN INTEGER FROM 4 TO 6 AND THE R''s are of the group consisting of hydrogen, alkyl, cycloalkyl, alkoxy, and single ring aromatic hydrocarbon radicals are polymerized with an initiator consisting of an organic dicarboxylic acid hydrate or anhydrous dicarboxylic acid and water to produce a product having at least two substantially linear units of the formula: WHEREIN THE VARIABLES N AND R have the aforesaid meanings.
Inventors
- 👤 William R Busler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:30
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/82; C08G63/823
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
20 words
The process of claim 1 wherein 1-2 gram millimoles of said water is employed per millimole of anhydrous dicarboxylic acid.
Claim 2
Dependent Claim
10 words
The process of claim 2 wherein said lactone is epsilon-caprolactone.
Claim 3
Dependent Claim
12 words
The process of claim 3 wherein said initiator is oxalic acid dihydrate.
Claim 4
Dependent Claim
12 words
The process of claim 3 wherein said initiator is anhydrous oxalic acid.
Claim 5
Dependent Claim
8 words
The product of the process of claim 2.
Claim 6
Dependent Claim
10 words
The product of claim 6 wherein said lactone is epsilon-caprolactone.
Claim 7
Dependent Claim
12 words
The product of claim 7 wherein said initiator is oxalic acid dihydrate.
Claim 8
Dependent Claim
12 words
The product of claim 7 wherein said initiator in anhydrous oxalic acid.
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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |