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US3966478A
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N,N-Dialkyl O,O-bis(haloalkyl)phosphoramidate flame retardant
Assignee: Stauffer Chemical Co
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Filing: 1972-07-21
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Granted: 1976-06-29
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Expires: 1992-07-21
Abstract
Abstract Fire resistant polymer compositions containing, as fire-retardant, N,N-dialkyl, O,O'-bis(haloalkyl)phosphoramidates. Polymers include urethanes, rayon and cellulose acetate.
Inventors
- 👤 Arthur D. F. Toy
- 👤 Kenneth L. Eilers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:44
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/5399; Y; Y10; Y10S; Y10S521/00; Y10S521/906; Y10S521/907
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
86 words
A fire retardant composition comprising, in intimate admixture, a polymeric material selected from the group consisting of polyurethanes, cellulosics, polyolefins, polyesters, vinyl polymers, polyacrylics, polyethers, polyacetals, polyphenolics, and rubber in combination with and as a fire retardant therefor, a haloalkyl N,N-dialkylphosphoramidate selected from the group consisting of 2,3-dihalopropyl N,N dialkylphosphoramidates and 2-(1,3-dihalopropyl) N,N-dialkylphosphoramidates wherein said halo substituent is selected from the group consisting of chloro and bromo, and the alkyl group attached to said "N" being an alkyl radical of from 1 to 4 carbon atoms.
Claim 2
Dependent Claim
86 words
A fire retardant composition comprising, in intimate admixture, a polymeric material selected from the group consisting of polyurethanes, cellulosics, polyolefins, polyesters, vinyl polymers, polyacrylics, polyethers, polyacetals, polyphenolics, and rubber in combination with and as a fire retardant therefor, a haloalkyl N,N-dialkylphosphoramidate selected from the group consisting of 2,3-dihalopropyl N,N dialkylphosphoramidates and 2-(1,3-dihalopropyl) N,N-dialkylphosphoramidates wherein said halo substituent is selected from the group consisting of chloro and bromo, and the alkyl group attached to said "N" being an alkyl radical of from 1 to 4 carbon atoms.
Claim 3
Dependent Claim
16 words
A fire retardant composition as recited in claim 1 wherein said polymeric material is a polyurethane.
Claim 4
Dependent Claim
15 words
A fire retardant composition as recited in claim 1 wherein said halo substituent is bromo.
Claim 5
Dependent Claim
19 words
A fire retardant composition as recited in claim 1 wherein said alkyl groups attached to said "N" are methyl.
Claim 6
Dependent Claim
16 words
A fire retardant composition as recited in claim 1 wherein said fire retardant is a 2,3-dihalopropylphosphoramidate.
Claim 7
Dependent Claim
29 words
A fire retardant composition as recited in claim 1 wherein said fire retardant is selected from the group consisting of bis(2,3-dichloropropyl)N,N-dimethyl phosphoramidate, bis(2,3-dibromopropyl)N,N-dimethyl phosphoramidate, bis[2-(1,3-dichloropropyl)]N,N-dimethyl phosphoramidate and bis[2-(1,3-dibromopropyl)]N,N-dimethyl phosphoramidate.
Claim 8
Dependent Claim
24 words
A fire retardant composition as recited in claim 1 wherein said polymeric material is a cellulosic of the viscose rayon or cellulose acetate type.
Claim 9
Dependent Claim
100 words
In a process for preparing fire retardant polymer compositions which comprise, in intimate admixture, a polymer selected from the group consisting of polyurethanes, cellulosics, vinyl polymers, polyolefins, polyesters, polyethers, polyacetals, polyepoxies, polyphenolics, and rubber, and a fire retardant compound, the improvement which comprises adding, as said fire retardant an effective amount of a haloalkyl N,N-dialkylphosphoramidate selected from the group consisting of 2,3-dihalopropyl N,N dialkylphosphoramidates and 2-(1,3dihalopropyl) N,N-dialkylphosphoramidates wherein said halo substituent is selected from the group consisting of chloro and bromo, and the alkyl group attached to said "N" being an alkyl radical of from 1 to 4 carbon atoms.
Claim 10
Dependent Claim
100 words
In a process for preparing fire retardant polymer compositions which comprise, in intimate admixture, a polymer selected from the group consisting of polyurethanes, cellulosics, vinyl polymers, polyolefins, polyesters, polyethers, polyacetals, polyepoxies, polyphenolics, and rubber, and a fire retardant compound, the improvement which comprises adding, as said fire retardant an effective amount of a haloalkyl N,N-dialkylphosphoramidate selected from the group consisting of 2,3-dihalopropyl N,N dialkylphosphoramidates and 2-(1,3dihalopropyl) N,N-dialkylphosphoramidates wherein said halo substituent is selected from the group consisting of chloro and bromo, and the alkyl group attached to said "N" being an alkyl radical of from 1 to 4 carbon atoms.
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) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |