Patent US4113671A successfully refreshed from Google Patents.
US4113671A
Expired / Lapsed
US
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Carbamate-phosphonates as flame-proofing agents in polyurethane foam
Assignee: Societe Nationale des Poudres et Explosifs
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Filing: 1977-10-03
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Granted: 1978-09-12
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Expires: 1997-10-03
Abstract
Abstract Carbamates of diethyl methylphosphonate of the formula: <IMAGE> wherein R1 and R2, which may be the same or different, are linear or branched alkyl or hydroxyalkyl radicals containing 2 or 3 carbon atoms, or R1 and R2 together with the nitrogen atom to which they are attached form a ring containing 4 or 5 carbon atoms, or R1 is phenyl and R2 is hydrogen, may be prepared by reacting diethyl hydroxymethyl-phosphonate chloroformate with an amine, and find application in flameproofing rigid or flexible polyurethane foams.
Inventors
- 👤 Serge L. Lecolier
- 👤 Jean-Marie J. Biehler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:51
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0038; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4006; C07F9/547; C07F9/553; C07F9/572; C07F9/576; C07F9/59; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3878; C08G18/3889; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S521/00; Y10S521/906
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
86 words
A rigid or flexible polyurethane foam which contains, as flameproofing agent, a carbamate-phosphonate of the formula: ##STR11## wherein R 1 and R 2 are the same or different and are linear or branched alkyl or hydroxyalkyl radicals containing 2 or 3 carbon atoms or R 1 or R 2 together with the nitrogen atom to which they are attached form a 5 or 6 member ring containing one nitrogen atom and 4 or 5 carbon atoms, or R 1 is phenyl and R 2 is hydrogen.
Claim 2
Dependent Claim
86 words
A rigid or flexible polyurethane foam which contains, as flameproofing agent, a carbamate-phosphonate of the formula: ##STR11## wherein R 1 and R 2 are the same or different and are linear or branched alkyl or hydroxyalkyl radicals containing 2 or 3 carbon atoms or R 1 or R 2 together with the nitrogen atom to which they are attached form a 5 or 6 member ring containing one nitrogen atom and 4 or 5 carbon atoms, or R 1 is phenyl and R 2 is hydrogen.
Claim 3
Dependent Claim
37 words
A rigid or flexible polyurethane foam according to claim 1, in which the amount of carbamate-phosphonate is such that the phosphorus content of the foam is between about 0.5 and about 2% by weight of the foam.
Claim 4
Dependent Claim
17 words
The polyurethane foam according to claim 1 wherein N,N-bis-(2-hydroxyethyl)-carbamate of diethyl methylphosphonate is present as flame-proofing agent.
Claim 5
Dependent Claim
19 words
The polyrethane foam according to claim 1 wherein N,N-diethylcarbamate of diethyl methylphosphonate is present as the flame proofing agent.
Claim 6
Dependent Claim
19 words
The polyurethane foam according to claim 1 wherein N-cyclotetramethylene-carbamate of diethyl methylphosphonate is is present as the flame-proofing agent.
Claim 7
Dependent Claim
18 words
The polyurethane foam according to claim 1 wherein N-cyclopentamethylene-carbamate of diethyl methylphosphonate is present as the flame-proofing agent.
Claim 8
Dependent Claim
19 words
The polyurethane foam according to claim 1 wherein the phenylcarbamate of diethyl methylphosphonate is present as the flame-proofing agent.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-11 | 1982-03-13 | 1982-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-11 | 1986-03-13 | 1986-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-11 | 1990-03-13 | 1990-09-12 | $7700.00 | Window Closed / Lapsed |