US4112014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
O,O'-Bis(hydroxyalkyl) N,N-di(lower-alkyl)aminomethane phosphonates
Assignee: Pharmacia and Upjohn Co
•
Filing: 1977-04-11
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Granted: 1978-09-05
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Expires: 1997-04-11
Abstract
Abstract Bis(2-hydroxyalkyl) N,N-di(lower-alkyl)aminomethylphosphonates are described. These phosphorus-containing polyols can be incorporated into polyurethane foams to render the latter fire retardant. They have the advantage over closely related phosphorus-containing polyols that they are autocatalytic in the polyurethane foam forming reaction and that they can be mixed with the polyol component of the polyurethane foam forming composition to give a mixture (premix) which can be maintained in storage for prolonged periods without showing any signs of deterioration.
Inventors
- 👤 Curtis P. Smith
- 👤 Henri Ulrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:47
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3878; C08G18/3889; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4006; C07F9/547; C07F9/6564; C07F9/6571
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
42 words
An O,O'-bis(hydroxyalkyl) N,N-di(lower-alkyl)aminomethanephosphonate having the formula: ##STR11## wherein R 1 , R 2 , R 3 , and R 4 are each independently selected from the class consisting of hydrogen and lower-alkyl, and R 5 and R 6 each independently represents lower-alkyl.
Claim 2
Dependent Claim
42 words
An O,O'-bis(hydroxyalkyl) N,N-di(lower-alkyl)aminomethanephosphonate having the formula: ##STR11## wherein R 1 , R 2 , R 3 , and R 4 are each independently selected from the class consisting of hydrogen and lower-alkyl, and R 5 and R 6 each independently represents lower-alkyl.
Claim 3
Dependent Claim
2 words
O,O'-bis(hydroxypropyl N-N-dimethylaminomethanephosphonate.
Claim 4
Dependent Claim
2 words
O,O'-bis(hydroxypropyl N-N-dimethylaminomethanephosphonate.
Claim 5
Dependent Claim
2 words
O,O'-bis(hydroxypropyl) N,N-diethylamninomethanephosphonate.
Claim 6
Dependent Claim
2 words
O,O'-bis(hydroxypropyl) N,N-diethylamninomethanephosphonate.
Claim 7
Dependent Claim
35 words
A compound according to claim 1 wherein each of R 1 , R 2 , R 3 and R 4 is hydrogen and R 5 and R 6 are methyl, said compound being O,O'-di(2-hydroxyethyl) N,N-dimethylaminomethanephosphonate.
References Cited (Backward Citations)
US3314957A
Cited
US3707587A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |