Patent US3576173A successfully refreshed from Google Patents.
Patent US4243759A successfully refreshed from Google Patents.
US4243759A
Expired / Lapsed
US
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Toluene diamine initiated polyether polyols
Assignee: Bayer Corp
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Filing: 1979-12-12
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Granted: 1981-01-06
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Expires: 1999-12-12
Abstract
Abstract The instant invention is directed to novel polyols and the use thereof in producing polyurethane foams. The polyols comprise the adduct obtained by first reacting toluene diamine with from three to five moles of ethylene oxide and thereafter with from 1 to 5.1 moles (per mole of toluene diamine) of a vicinal alkylene oxide of from 3 to 9 carbon atoms, with the proviso that the total number of moles of ethylene oxide plus vicinal alkylene oxide does not exceed 8.1 and is no less than 5. When polyurethane foams are produced using the novel polyols herein, foams of low friability and good dimensional stability result.
Inventors
- 👤 James L. Haas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:06
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2618; C08G65/2621; C08G65/2627; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5033; C08G2110/00; C08G2110/0025; C08G2110/0083
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
119 words
In the production of polyurethane foam by reacting an organic polyisocyanate with an active hydrogen containing material in the presence of a blowing agent, the improvement wherein said active hydrogen containing material comprises (a) from 10 to 100 percent by weight of an adduct obtained by sequentially reacting toluene diamine with from 3 to 5 moles of ethylene oxide and then with from 1 to 5.1 moles of a vicinal alkylene oxide of from 3 to 9 carbon atoms, the total number of moles of ethylene oxide plus vicinal alkylene oxide being at least five and no more than 8.1, (b) from 0 to 90 percent by weight of an organic material containing from 2 to 8 hydroxyl groups.
Claim 2
Dependent Claim
119 words
In the production of polyurethane foam by reacting an organic polyisocyanate with an active hydrogen containing material in the presence of a blowing agent, the improvement wherein said active hydrogen containing material comprises (a) from 10 to 100 percent by weight of an adduct obtained by sequentially reacting toluene diamine with from 3 to 5 moles of ethylene oxide and then with from 1 to 5.1 moles of a vicinal alkylene oxide of from 3 to 9 carbon atoms, the total number of moles of ethylene oxide plus vicinal alkylene oxide being at least five and no more than 8.1, (b) from 0 to 90 percent by weight of an organic material containing from 2 to 8 hydroxyl groups.
Claim 3
Dependent Claim
11 words
The polyurethane foam produced according to the process of claim 1.
References Cited (Backward Citations)
GB972772A
Cited
US3423344A
Cited
US3499009A
Cited
US3462492A
Cited
US3403131A
Cited
GB1177636A
Cited
GB1165434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-06 | 1984-07-07 | 1985-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-06 | 1988-07-07 | 1989-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-06 | 1992-07-07 | 1993-01-06 | $7700.00 | Window Closed / Lapsed |