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Patent US3846373A successfully refreshed from Google Patents.
US3846373A
Expired / Lapsed
US
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Flame-retardant acrylic synthetic fibers having improved properties
Assignee: Japan Exlan Co Ltd
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Filing: 1972-09-01
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Granted: 1974-11-05
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Expires: 1992-09-01
Abstract
Abstract Flame-retardant acrylic synthetic fibers containing a fluid mixture obtained by dissolving halogen- and/or phosphoruscontaining solid organic compounds in a liquid halogenated aliphatic phosphate.
Inventors
- 👤 T Ichimaru
- 👤 K Takeya
- 👤 H Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:09
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/521
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
108 words
A FLAME-RETARDANT MONOCOMPONENT ACRYLIC SYNTHETIC FIBER COMPRISING AN ACRYLONITRILE POLYMER SELECTED FROM THE GROUP CONSISSTING OF HOMOPOLYMRS OF ACRYLONITRILE AND COPOLYMERS CONTAINING AT LEAST 70 PERCENT ACRYLONITRILE AND UP TO 30 PERCENT OF AT LEAST ONE MONOETHYLENICALLY UNSATURATED MONOMER COPOLYMERIZED THEREWITH, AND HAVING INCORPORATED IN SUCH FIBERS 3-40 PERCENT BY WEIGHT OF A FLUID MIXTURE HAVING A VISCOSITY OF AT LEAST 6,000 CENTIPOISES AT 25*C OBTAINED BY DISSOLVING (1) AN ORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF HALOGENATED PARAFFINS, HALOGENATED ARALKYL PHOSPHATES, HALOGENATED ARYL PHOSPHATES, HALOGENATED DIPENYL ETHERS, HALOGENATED PHENOLS, HALOGENATED ALKYL ETHERS OF THE HALOGENATED PHENOLS, TETRABROMOBISPHENOL-A AND ETHERIIFIED DERIVATIVES OF TETRABROMOBISPHENOL-A REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
108 words
A FLAME-RETARDANT MONOCOMPONENT ACRYLIC SYNTHETIC FIBER COMPRISING AN ACRYLONITRILE POLYMER SELECTED FROM THE GROUP CONSISSTING OF HOMOPOLYMRS OF ACRYLONITRILE AND COPOLYMERS CONTAINING AT LEAST 70 PERCENT ACRYLONITRILE AND UP TO 30 PERCENT OF AT LEAST ONE MONOETHYLENICALLY UNSATURATED MONOMER COPOLYMERIZED THEREWITH, AND HAVING INCORPORATED IN SUCH FIBERS 3-40 PERCENT BY WEIGHT OF A FLUID MIXTURE HAVING A VISCOSITY OF AT LEAST 6,000 CENTIPOISES AT 25*C OBTAINED BY DISSOLVING (1) AN ORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF HALOGENATED PARAFFINS, HALOGENATED ARALKYL PHOSPHATES, HALOGENATED ARYL PHOSPHATES, HALOGENATED DIPENYL ETHERS, HALOGENATED PHENOLS, HALOGENATED ALKYL ETHERS OF THE HALOGENATED PHENOLS, TETRABROMOBISPHENOL-A AND ETHERIIFIED DERIVATIVES OF TETRABROMOBISPHENOL-A REPRESENTED BY THE FORMULA
Claim 3
Dependent Claim
21 words
The acrylic synthetic fiber of claim 1 wherein said fluid mixture has a viscosity of up to 300,000 centipoises at 25*C.
Claim 4
Dependent Claim
36 words
The acrylic synthetic fiber of claim 1 wherein the mixing ratio of the halogenated aliphatic phosphate and the organic compound in said fluid mixture is within the range of from 9.5: 0.5 to 0.5:9.5 by weight.
Claim 5
Dependent Claim
22 words
The acrylic synthetic fiber of claim 3 wherein said mixing ratio is within the range of from 9:1 to 3:7 by weight.
Claim 6
Dependent Claim
25 words
The acrylic synthetic fiber of claim 1 wherein said halogenated aliphatic phosphate is a liquid having a refractive index of 1.44 to 1.60 at 25*C.
Claim 7
Dependent Claim
39 words
The acrylic synthetic fiber of claim 1 wherein said halogenated aliphatic phosphate is selected from the group consisting of tris( Beta -chloroethyl)phosphate, tris( Beta -bromoethyl)phosphate, tris(3-chloropropyl)phosphate, tris(3-bromopropyl)phosphate, tris(2,3-dichloropropyl) phosphate, tris(2,3-dibromopropyl)phosphate, tris(1-bromo-3-chloroisopropyl)phosphate, tris(2,3-dichlorobutyl) phosphate, tris(2,3-dibromobutyl)phosphate, bis(2,3-dichloropropyl)2,3-dibromopropyl phosphate and bis(2,3-dibromopropyl)2,3-dichloropropyl phosphate.
Claim 8
Dependent Claim
19 words
The acrylic synthetic fiber of claim 1 wherein said fluid mixture consists essentially of tris(1-bromo-3-chloroisopropyl)phosphate and bis(2,3-dibromopropyl)ether of tetrabromobisphenol-A.
Claim 9
Dependent Claim
21 words
The acrylic synthetic fiber of claim 1 wherein said fluid mixture consists essentially of tris(1-bromo-3-chloroisopropyl)phosphate and bis( Beta -bromoethyl)ether of tetrabromobisphenol-A.
Claim 10
Dependent Claim
22 words
The acrylic synthetic fiber of claim 1 wherein said fluid mixture consists essentially of tris(2,3-dibromopropyl) phosphate and bis( Beta -bromoethyl)ether of tetrabromobisphenol-A.
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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |