US3979373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric furan derivative
Assignee: Shell USA Inc
•
Filing: 1975-06-13
•
Granted: 1976-09-07
•
Expires: 1995-06-13
Abstract
Abstract A thermoplastic polymer composition and the method for making the same are disclosed. The polymer composition comprises randomly distributed units of ##EQU1## and IN SPECIFIED RATIOS. The process for producing the polymer comprises reacting a polyketone with a strong acid wherein the polyketone is the equimolar alternate copolymer of ethylene and carbon monoxide.
Inventors
- 👤 Thomas E. Kiovsky
- 👤 Richard C. Kromer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:05
CPC Classifications
C; C08; C08G; C08G67/00; C08G67/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
53 words
The thermoplastic polymer characterized by random distribution along the polymer chain of n units of ##EQU15## and m units of ##EQU16## wherein n and m are both integers, n has a value of from about 150 to about 10,000, and the ratio of m to n varies from about 2:100 to about 25:100.
Claim 2
Dependent Claim
53 words
The thermoplastic polymer characterized by random distribution along the polymer chain of n units of ##EQU15## and m units of ##EQU16## wherein n and m are both integers, n has a value of from about 150 to about 10,000, and the ratio of m to n varies from about 2:100 to about 25:100.
Claim 3
Dependent Claim
31 words
The polymer of claim 1 wherein n has a value of from about 600 to about 8,000 and the ratio of m to n varies from about 3:100 to about 20:100.
Claim 4
Dependent Claim
36 words
The process for making a thermoplastic polymer which comprises reacting a polyketone with a strong acid at a temperature of between about 40°C and about 200°C for between about 10 minutes and about 3 hours wherein:
Claim 5
Dependent Claim
36 words
The process for making a thermoplastic polymer which comprises reacting a polyketone with a strong acid at a temperature of between about 40°C and about 200°C for between about 10 minutes and about 3 hours wherein:
Claim 6
Dependent Claim
48 words
a. said polyketone in the equimolar alternating copolymer of ethylene and carbon monoxide having the formula ##EQU17## where x has a value of from about 150 to about 10,000; and b. the ratio of the moles of strong acid to x varies from about 1:100 to about 10:100.
Claim 7
Dependent Claim
48 words
a. said polyketone in the equimolar alternating copolymer of ethylene and carbon monoxide having the formula ##EQU17## where x has a value of from about 150 to about 10,000; and b. the ratio of the moles of strong acid to x varies from about 1:100 to about 10:100.
Claim 8
Dependent Claim
24 words
The process according to claim 3 wherein said strong acid is an acid having a pK a of between about -3.0 and about 2.5.
Claim 9
Dependent Claim
30 words
The process according to claim 3 wherein said strong acid is selected from the group consisting of sulfuric acid, phosphoric acid, para-toluenesulfonic acid, trifluoroacetic acid, trifluoromethane-sulfonic acid, and para-phenolsulfonic acid.
Claim 10
Dependent Claim
24 words
The process according to claim 3 wherein said strong acid is selected from the group consisting of sulfuric acid, trifluoroacetic acid, and para-toluenesulfonic acid.
Claim 11
Dependent Claim
30 words
The process according to claim 3 wherein said polyketone and said strong acid are contacted in the presence of a solvent selected from the group consisting of hexafluoroisopropanol and meta-cresol.
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) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |