Patent US2803306A successfully refreshed from Google Patents.
US4158077A
Expired / Lapsed
US
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Flame retardants for synthetic materials (I)
Assignee: White Chemical Corp
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Filing: 1977-05-17
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Granted: 1979-06-12
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Expires: 1997-05-17
Abstract
Abstract A process for rendering synthetic materials, of synthetic fibers or mixtures of the same flame resistant, which entails employing water insoluble flame retardant agents which are treated as colorless pigments, reduced to extremely finely divided condition, suspended in aqueous medium and applied as such or as part of a dispersed dye paste to the fabric, dried and set in place.
Inventors
- 👤 Vladimir Mischutin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:21
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/08
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
105 words
The process of rendering a fibrous textile fabric of inherently flammable nature flame resistant that comprises dispersing in said fabric an organic brominated flame retardant compound having a melting point above 100° C., and a particle size of 0.1 to 10 microns in diameter, suspended in an aqueous suspension, drying and sequentially heating said fabric and compound to a temperature sufficient to melt said compound and effect impregnation of said fabric therewith; said melting point being from 20° C. to 30° C. below that at which said heating occurs and 10° C. to 20° C. higher than the temperature at which said drying is effected.
Claim 2
Dependent Claim
105 words
The process of rendering a fibrous textile fabric of inherently flammable nature flame resistant that comprises dispersing in said fabric an organic brominated flame retardant compound having a melting point above 100° C., and a particle size of 0.1 to 10 microns in diameter, suspended in an aqueous suspension, drying and sequentially heating said fabric and compound to a temperature sufficient to melt said compound and effect impregnation of said fabric therewith; said melting point being from 20° C. to 30° C. below that at which said heating occurs and 10° C. to 20° C. higher than the temperature at which said drying is effected.
Claim 3
Dependent Claim
17 words
The method in accordance with claim 1 in which the flame retardant compound is tris tribromophenyl phosphate.
Claim 4
Dependent Claim
17 words
A method as claimed in claim 1, wherein said brominated flame retardant compound is polybrominated biphenyl oxide.
Claim 5
Dependent Claim
15 words
A method as claimed in claim 1 wherein said brominated flame retardant compound is hexabromocyclododecane.
Claim 6
Dependent Claim
17 words
A method as claimed in claim 1, wherein said brominated flame retardant compound is polybrominated bisphenol A.
Claim 7
Dependent Claim
54 words
The method of claim 1 wherein the flame retardant material is selected from the group consisting of: polybrominated biphenyl polybrominated biphenyl oxide polybrominated benzene polybrominated toluene polybrominated chlorotoluene polybrominated phenol polybrominated aniline tris phosphates of polybrominated phenols polybrominated cyclopentane polybrominated cyclohexane polybrominated cyclooctane polybrominated cyclodecane polybrominated cyclododecane hexachlorocyclopentadieno-dibromocyclooctane N,n'-ethyl-bis (dibromo-norbornenedicarboximide), and polybrominated bisphenol A.
Claim 8
Dependent Claim
14 words
A method as claimed in claim 6 wherein said polybrominated benzene is hexabromo benzene.
Claim 9
Dependent Claim
14 words
A method as claimed in claim 6 wherein said polybrominated biphenyl is hexabromo biphenyl.
Claim 10
Dependent Claim
37 words
A process as claimed in claim 1, wherein said brominated flame retardant compound has a melting point within the range of 125° C. to 175° C. and an average particle diameter of up to about 2 microns.
Claim 11
Dependent Claim
39 words
A process as claimed in claim 9, wherein said brominated flame retardant compound is further characterized by a stability to a temperture of up to 250° C. for a period of at least five minutes without discoloration or evaporation.
Claim 12
Dependent Claim
21 words
A process as claimed in claim 1, wherein said fabric is a polyester, polypropylene, polyethylene, cellulose diacetate, cellulose triacetate or polyamide.
Claim 13
Dependent Claim
47 words
A process as claimed in claim 1, wherein said brominated fire retardant compound is present in said suspension in a proportion by weight of from 0.25 part to 1 part thereof to 0.3 part of water; said suspension including a suspending agent for said fire retardant compound.
Claim 14
Dependent Claim
20 words
A process as claimed in claim 12, wherein said suspension includes 0.1 percent to 0.5 percent of nonionic wetting agent.
Claim 15
Dependent Claim
20 words
A process as claimed in claim 12, wherein said suspension includes 0.2 percent to 0.5 percent of hydroxy ethyl cellulose.
Claim 16
Dependent Claim
26 words
A process as claimed in claim 12, wherein said suspension is further diluted with 0.5 to 10 parts of water for each part of dispersion present.
Claim 17
Dependent Claim
35 words
A process as claimed in claim 1, wherein said brominated fire retardant compound is present in said suspension in a proportion by weight of from 1 to 3 parts to each part of water present.
Claim 18
Dependent Claim
24 words
A process as claimed in claim 1 wherein said brominated flame retardant compound has an average particle size diameter of up to 3 microns.
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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) | 1982-06-11 | 1982-12-11 | 1983-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-11 | 1986-12-11 | 1987-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-11 | 1990-12-11 | 1991-06-12 | $7700.00 | Window Closed / Lapsed |