US3890092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-retardant material and process
Assignee: Monsanto Research Corp
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Filing: 1973-10-26
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Granted: 1975-06-17
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Expires: 1993-10-26
Abstract
Abstract Aminocyclophosphazene is used to treat polybenzimidazole material, aromatic polyimide and aromatic polyamide material to improve the flame-retardancy thereof. Material is defined to include foams, fibers, yarns, cloth and the polymers per se in any form. Conveniently the material can be treated with an aqueous solution of aminocyclophosphazene and dried. Then the treated and dried material is cured at a sufficient temperature to bond the aminocyclophosphazene to the material. Alternatively the drying and curing can be accomplished as a single operation.
Inventors
- 👤 Albert Y Garner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:26
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/48; C08G73/00; C08G73/06; C08G73/08; C08G73/10; C08G73/1003; C08G73/18; C08J; C08J9/00; C08J9/36; C08L; C08L79/00; C08L79/04; C08L79/08; D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/667; D06M15/673
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
41 words
A PROCESS FOR IMPROVING THE FLAME-RETARDANCY OF POLYBENZIMIDAZOLE MATERIAL, AROMATIC POLYIMIDE MATERIAL OR AROMATIC POLYAMIDE MATERIAL COMPRISING TREATING SAID MATERIAL WITH AMINOCYCLOPHOSPHAZENE IN SUFFICIENT AMOUNT AND CURING THE TREATED MATERIAL AT A SUFFICIENT TEMPERATURE TO IMPROVE FLAMERETARDANCY IN HIGH OXYGEN ATMOSPHERE.
Claim 2
Dependent Claim
41 words
A PROCESS FOR IMPROVING THE FLAME-RETARDANCY OF POLYBENZIMIDAZOLE MATERIAL, AROMATIC POLYIMIDE MATERIAL OR AROMATIC POLYAMIDE MATERIAL COMPRISING TREATING SAID MATERIAL WITH AMINOCYCLOPHOSPHAZENE IN SUFFICIENT AMOUNT AND CURING THE TREATED MATERIAL AT A SUFFICIENT TEMPERATURE TO IMPROVE FLAMERETARDANCY IN HIGH OXYGEN ATMOSPHERE.
Claim 3
Dependent Claim
11 words
A process of claim 1 wherein said material comprises polybenzimidazole foam.
Claim 4
Dependent Claim
11 words
A process of claim 1 wherein said material comprises polybenzimidazole fiber.
Claim 5
Dependent Claim
11 words
A process of claim 1 wherein said material comprises polybenzimidazole cloth.
Claim 6
Dependent Claim
25 words
A process of claim 4 wherein said material comprises polybenzimidazole cloth which has been treated with bromine to improve flame-retardancy prior to said aminocyclophosphazene treatment.
Claim 7
Dependent Claim
25 words
A process of claim 4 wherein said material comprises polybenzimidazole cloth which has been treated with POCl3/POBr3 to improve flame-retardancy prior to said aminocyclophosphazene treatment.
Claim 8
Dependent Claim
12 words
A process of claim 1 wherein said material comprises aromatic polyamide foam.
Claim 9
Dependent Claim
12 words
A process of claim 1 wherein said material comprises aromatic polyamide fibers.
Claim 10
Dependent Claim
12 words
A process of claim 1 wherein said material comprises aromatic polyamide cloth.
Claim 11
Dependent Claim
26 words
A process of claim 9 wherein said material comprises aromatic polyamide cloth which has been treated with bromine to improve flame-retardancy prior to said aminocyclophosphazene treatment.
Claim 12
Dependent Claim
26 words
A process of claim 9 wherein said material comprises aromatic polyamide cloth which has been treated with chlorine to improve flame-retardancy prior to said aminocyclophosphazene treatment.
Claim 13
Dependent Claim
26 words
A process of claim 9 wherein saId material comprises aromatic polyamide cloth which has been treated with POCl3/POBr3 to improve flame-retardancy prior to said aminocyclophosphazene treatment.
Claim 14
Dependent Claim
33 words
A process of claim 12 wherein said material comprises aromatic polyamide cloth which has been treated with bromine to further improve flame-retardancy subsequent to said POCl3/POBr3 treatment and prior to said aminocyclophosphazene treatment.
Claim 15
Dependent Claim
25 words
A process of claim 9 wherein said polyamide cloth comprises 30 to 70 weight percent aromatic polyamide and 70 to 30 weight percent cotton cloth.
Claim 16
Dependent Claim
12 words
A process of claim 1 wherein said material comprises aromatic polyimide foam.
Claim 17
Dependent Claim
12 words
A process of claim 1 wherein said material comprises aromatic polyimide fiber.
Claim 18
Dependent Claim
12 words
A process of claim 1 wherein said material comprises aromatic polyimide cloth.
Claim 19
Dependent Claim
10 words
A flame-retardant material made by the process of claim 1.
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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |