US3945954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant polyurethanes from polymeric halogenated organo phosphorous diols
Assignee: Uniroyal Chemical Co Inc
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Filing: 1974-10-31
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Granted: 1976-03-23
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Expires: 1994-10-31
Abstract
Abstract Polymeric halogenated organophosphorus diols are obtained by reacting chlorine or bromine with spirocyclic phosphites and thereafter reacting the halogenated product with a diol, in the presence of an acid acceptor. These novel viscous polymers react with polyisocyantes to produce polyurethanes. Polyurethanes so made are characterized by improved flame retardant properties compared with conventional polyurethanes. Such polyurethanes are preferably in the form of foams, especially flexible foams.
Inventors
- 👤 Wadim Batorewicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:57
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/02; C08G79/06; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/12; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3878; C08G18/3882; C08G18/3885
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
104 words
A flame retardant polyurethane material resulting from the interaction of an organic polyisocyanate and a polyol material comprising a polymeric organophosphorus ester diol having the structure ##SPC4## wherein R may be: a. hydrogen, chlorine, or bromine; b. an alkyl, haloalkyl, or alkoxy radical having from one to six carbon atoms; wherein n may vary from 1 to 3; wherein R 1 may be: a branched or linear alkylene, alkenylene, alkynylene or alkoxyalkylene radical containing from two to ten carbon atoms, optionally containing bromine or chlorine substituents; wherein X may be chlorine or bromine; and wherein y has a value of from 1 to 7.
Claim 2
Dependent Claim
104 words
A flame retardant polyurethane material resulting from the interaction of an organic polyisocyanate and a polyol material comprising a polymeric organophosphorus ester diol having the structure ##SPC4## wherein R may be: a. hydrogen, chlorine, or bromine; b. an alkyl, haloalkyl, or alkoxy radical having from one to six carbon atoms; wherein n may vary from 1 to 3; wherein R 1 may be: a branched or linear alkylene, alkenylene, alkynylene or alkoxyalkylene radical containing from two to ten carbon atoms, optionally containing bromine or chlorine substituents; wherein X may be chlorine or bromine; and wherein y has a value of from 1 to 7.
Claim 3
Dependent Claim
17 words
A flame retardant polyurethane material as set forth in claim 1, said polyurethane material being a foam.
Claim 4
Dependent Claim
18 words
A flame retardant polyurethane material as set forth in claim 1, said polyurethane material being a flexible foam.
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) | 1979-03-23 | 1979-09-22 | 1980-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-23 | 1983-09-22 | 1984-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-23 | 1987-09-22 | 1988-03-23 | $7700.00 | Window Closed / Lapsed |