US3855382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing flame-retardant acrylic fibers
Assignee: Japan Exlan Co Ltd
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Filing: 1973-03-13
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Granted: 1974-12-17
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Expires: 1993-03-13
Abstract
Abstract A process for preparing flame-retardant acrylic fibers which comprises (a) preparing an acrylic fiber gel containing fine particles of vinyl halide or vinylidene halide polymers by wetspinning, (b) treating the fiber gel with organic phosphates and/or phosphonates, and (c) thereafter stretching the fiber gel in hot water. Thus obtained fibers have an excellent flame resistance, high luster and improved strength.
Inventors
- 👤 K Takeya
- 👤 T Kobashi
- 👤 K Masuhara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:23
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/244; D06M13/282; D06M13/292; D01; D01F; D01F11/00; D01F11/04; D01F11/06; D01F6/00; D01F6/02; D01F6/18; D01F6/28; D01F6/38; D06M13/288; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2971; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
107 words
AN IMPROVED PROCESS FOR PRODUCING FLAME-RETARDANT ACRYLIC FIBER WHICH COMPRISES A. PREPARING ACRYLIC FIBERS IN A HYDROGEL CONDITION BY WETSPINNING A SPINNING SOLUTION, WHICH CONSISTS OF ACRYLONITRILE HOMO-OR -CO-POLYMERS AND A CONCENTRATED AQUEOUS SOLUTION OF THIOCYANATE, CONTAINING FINELY DISPERSED PARTICLES OF A HALOGEN-CONTAINING POLYMER SELECTED FROM THE GROUP OF HOMO- AND CO-POLYMERS OF VINYL HALIDE AND HOMO-AND CO-POLYMER OF VINYLIDENE HALIDE, B. TREATING SAID ACRYLIC FIBERS IN A HYDROGEL CONDITION WITH AT LEAST ONE ORGANIC COMPOUND, WHICH CAN DISSOLVE, SWELL OR PLASTICIZE THE HALOGEN-CONTAINING POLYMER, SELECTED FROM THE GROUP OF AN ORGANIC PHOSPHATE AND AN ORGANIC PHOSPHONATE RESPECTIVELY REPRESENTED BY THE FOLLOWING GENERAL FORMULAS (1) AND (11)
Claim 2
Dependent Claim
107 words
AN IMPROVED PROCESS FOR PRODUCING FLAME-RETARDANT ACRYLIC FIBER WHICH COMPRISES A. PREPARING ACRYLIC FIBERS IN A HYDROGEL CONDITION BY WETSPINNING A SPINNING SOLUTION, WHICH CONSISTS OF ACRYLONITRILE HOMO-OR -CO-POLYMERS AND A CONCENTRATED AQUEOUS SOLUTION OF THIOCYANATE, CONTAINING FINELY DISPERSED PARTICLES OF A HALOGEN-CONTAINING POLYMER SELECTED FROM THE GROUP OF HOMO- AND CO-POLYMERS OF VINYL HALIDE AND HOMO-AND CO-POLYMER OF VINYLIDENE HALIDE, B. TREATING SAID ACRYLIC FIBERS IN A HYDROGEL CONDITION WITH AT LEAST ONE ORGANIC COMPOUND, WHICH CAN DISSOLVE, SWELL OR PLASTICIZE THE HALOGEN-CONTAINING POLYMER, SELECTED FROM THE GROUP OF AN ORGANIC PHOSPHATE AND AN ORGANIC PHOSPHONATE RESPECTIVELY REPRESENTED BY THE FOLLOWING GENERAL FORMULAS (1) AND (11)
Claim 3
Dependent Claim
37 words
The process of claim 1 wherein said acrylonitrile copolymer contains at least about 70 percent of acrylonitrile, by weight, based on the total weight of the polymer, and the balance of one or more comonomers copolymerizable therewith.
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein the halogen-containing polymer is polyvinyl chloride.
Claim 5
Dependent Claim
18 words
The process of claim 1 wherein the halogen-containing polymer is a copolymer of vinyl chloride and vinylidene chloride.
Claim 6
Dependent Claim
37 words
The process of claim 1 wherein an amount of halogen-containing polymer to add to the spinning solution is 10 to 120 percent by weight based on the weight of the acrylonitrile polymer present in the spinning solution.
Claim 7
Dependent Claim
30 words
The process of claim 5 wherein the amount of halogen-containing polymer is 30 to 100 percent by weight based on the weight of acrylonitrile polymer present in the spinning solution.
Claim 8
Dependent Claim
37 words
The process of claim 1 wherein said organic compound is selected from the group of tributyl phosphate, trioctyl phosphate, triphenylphosphate, tribenzyl phosphate, tricresyl phosphate, tris(2,3-dibromopropyl)phosphate, tris(2,3-dichloropropyl)phosphate, tris(chlorobromoethyl)phosphate, tris(bromochloropropyl)phosphate, tris(2-chloroethyl)phosphate, bisdibromopropyldichloropropyl phosphate, bisbromochloropropylbromochloropropyl phosphate, bisdibromopropylidibromopropyl phosphonate, bis-2-chloroethylvinyl phosphonate,
Claim 9
Dependent Claim
39 words
The process of claim 1 wherein the amount of absorption of the organic compound in the fiber in such treatment is 10 to 80 percent by weight based on the weight of the halogen-containing polymer present in the fiber.
Claim 10
Dependent Claim
109 words
An improved process for producing flame-retardant acrylic fibers which comprises a. preparing acrylic fibers in a hydrogel condition by wet-spinning a spinning solution, which consists of acrylonitrile homo- or co-polymerS and a concentrated aqueous solution of thiocyanate, containing finely dispersed particles of a halogen-containing polymer selected from the group of homo- and co-polymers of vinyl halide and homo- and co-polymers of vinylidene halide, b. treating said acrylic fibers in a hydrogel condition with at least one organic compound, which can dissolve, swell or plasticize the halogen-containing polymer, selected from the group of an organic phosphate and an organic phosphonate respectively represented by the following general formula (I) and (II)
Claim 11
Dependent Claim
109 words
An improved process for producing flame-retardant acrylic fibers which comprises a. preparing acrylic fibers in a hydrogel condition by wet-spinning a spinning solution, which consists of acrylonitrile homo- or co-polymerS and a concentrated aqueous solution of thiocyanate, containing finely dispersed particles of a halogen-containing polymer selected from the group of homo- and co-polymers of vinyl halide and homo- and co-polymers of vinylidene halide, b. treating said acrylic fibers in a hydrogel condition with at least one organic compound, which can dissolve, swell or plasticize the halogen-containing polymer, selected from the group of an organic phosphate and an organic phosphonate respectively represented by the following general formula (I) and (II)
Claim 12
Dependent Claim
109 words
An improved process for producing flame-retardant acrylic fibers which comprises a. preparing acrylic fibers in a hydrogel condition by wet-spinning a spinning solution, which consists of acrylonitrile homo- or co-polymers and a concentrated aqueous solution of thiocyanate, containing finely dispersed particles of a halogen-containing polymer selected from the group of homo- and co-polymers of vinyl halide and homo- and co-polymers of vinylidene halide, b. treating said acrylic fibers in a hydrogel condition with at least one organic compound, which can dissolve, swell or plasticize the halogen-containing polymer, selected from the group of an organic phosphate and an organic phosphonate respectively represented by the following general formula (I) and (II)
Claim 13
Dependent Claim
109 words
An improved process for producing flame-retardant acrylic fibers which comprises a. preparing acrylic fibers in a hydrogel condition by wet-spinning a spinning solution, which consists of acrylonitrile homo- or co-polymers and a concentrated aqueous solution of thiocyanate, containing finely dispersed particles of a halogen-containing polymer selected from the group of homo- and co-polymers of vinyl halide and homo- and co-polymers of vinylidene halide, b. treating said acrylic fibers in a hydrogel condition with at least one organic compound, which can dissolve, swell or plasticize the halogen-containing polymer, selected from the group of an organic phosphate and an organic phosphonate respectively represented by the following general formula (I) and (II)
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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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |