Patent US4231368A successfully refreshed from Google Patents.
US4101439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyol blends and polyurethane prepared therefrom
Assignee: FLUROCARBON COMPANY
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Filing: 1976-07-06
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Granted: 1978-07-18
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Expires: 1996-07-06
Abstract
Abstract A poly(oxyethylene-oxypropylene)glycol and poly(sutramethylene ether)glycol are blended together and the resulting blend and a chain extender are reacted with an organic diisocyanate under conditions which produce a thermoplastically processible polyurethane elastomer. The polyurethane elastomer can be used to advantage for making the sheath of a hydraulic hose.
Inventors
- 👤 David D. Russell
- 👤 George Shkapenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:20
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4804; C08G18/4808; C08G18/4833; C08G18/4837; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6674; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2935
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A blend of a block copolymer of ethyleneoxide and 1,2-propylene oxide having the formula HO[(C.sub.2 H.sub.5 --O).sub.x (C.sub.3 H.sub.6 --O).sub.y (C.sub.2 H.sub.5 --O).sub.z ]H wherein x and z are integers of from 0 to 22 and y is an integer of from 1 to 20 and the molecular weight of the copolymer is between 500 and 3000 and poly(tetramethylene ether)glycol having a molecular weight of from about 500 to about 3000, in a ratio of from about 5 to about 95 parts by weight of the copolymer per 100 parts of poly(tetramethylene ether)glycol, said block copolymer containing from about 60 to about 100 percent primary hydroxyl groups.
Claim 2
Dependent Claim
107 words
A blend of a block copolymer of ethyleneoxide and 1,2-propylene oxide having the formula HO[(C.sub.2 H.sub.5 --O).sub.x (C.sub.3 H.sub.6 --O).sub.y (C.sub.2 H.sub.5 --O).sub.z ]H wherein x and z are integers of from 0 to 22 and y is an integer of from 1 to 20 and the molecular weight of the copolymer is between 500 and 3000 and poly(tetramethylene ether)glycol having a molecular weight of from about 500 to about 3000, in a ratio of from about 5 to about 95 parts by weight of the copolymer per 100 parts of poly(tetramethylene ether)glycol, said block copolymer containing from about 60 to about 100 percent primary hydroxyl groups.
References Cited (Backward Citations)
US3627714A
Cited
US3915937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |