US4007250A
Expired / Lapsed
US
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Method for producing infusible and insoluble styrene copolymeric fibers
Assignee: Kanebo Ltd
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Filing: 1975-10-22
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Granted: 1977-02-08
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Expires: 1995-10-22
Abstract
Abstract Infusible and insoluble styrene copolymeric fibers are prepared by copolymerizing styrene with an olefinic compound having at least one functional group selected from haloalkyl group, amino group, carboxyl group, carbonic acid ester group, carbonic acid halide group, hydroxyl group, amido group, nitrile group and halogen atom, melt spinning the resulting styrene copolymer into fibers and treating the formed fibers with a cross-linking agent to form three dimensional cross-linkages in the fibers.
Inventors
- 👤 Isao Kimura
- 👤 Koichiro Ohtomo
- 👤 Katsushi Shirane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:35
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/28; D01F6/42; D01F11/00; D01F11/04; D01F11/06
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
211 words
A method for producing infusible and insoluble styrene copolymer fibers which comprises copolymerizing monomers consisting essentially of styrene and at least one ethylenically unsaturated comonomer having one of the following two formulae ##STR2## wherein R 1 is hydrogen, alkyl having 1 to 4 carbon atoms, halogen carboxyl or ester thereof, R 2 is hydrogen, alkyl having 1 to 4 carbon atoms or phenyl, X is haloalkyl, amino, carboxyl, carboxylic acid ester, carboxylic acid halide, hydroxyl, amido, nitrile or halogen, n is 0 or 1 and m is 1, 2 or 3, in a molar ratio of stryene to said comonomer of 99/1 to 20/80, to form a styrene copolymer having a molecular weight of 2,000 to 500,000, melt spinning the resulting styrene copolymer into fibers, immersing said fibers in a liquid solution of a cross-linking agent, said solution having an initial temperature of from 20° to 30° C, then raising the temperature of said solution to form 50° to 120° C. in a period of 0.5 to 10 hours and then maintaining the solution at the latter temperature for 1 to 20 hours while maintaining said fibers immersed in said solution to complete the cross linking throughout the entire cross section of the fibers whereby to obtain infusible and insoluble fibers.
Claim 2
Independent Claim
211 words
A method for producing infusible and insoluble styrene copolymer fibers which comprises copolymerizing monomers consisting essentially of styrene and at least one ethylenically unsaturated comonomer having one of the following two formulae ##STR2## wherein R 1 is hydrogen, alkyl having 1 to 4 carbon atoms, halogen carboxyl or ester thereof, R 2 is hydrogen, alkyl having 1 to 4 carbon atoms or phenyl, X is haloalkyl, amino, carboxyl, carboxylic acid ester, carboxylic acid halide, hydroxyl, amido, nitrile or halogen, n is 0 or 1 and m is 1, 2 or 3, in a molar ratio of stryene to said comonomer of 99/1 to 20/80, to form a styrene copolymer having a molecular weight of 2,000 to 500,000, melt spinning the resulting styrene copolymer into fibers, immersing said fibers in a liquid solution of a cross-linking agent, said solution having an initial temperature of from 20° to 30° C, then raising the temperature of said solution to form 50° to 120° C. in a period of 0.5 to 10 hours and then maintaining the solution at the latter temperature for 1 to 20 hours while maintaining said fibers immersed in said solution to complete the cross linking throughout the entire cross section of the fibers whereby to obtain infusible and insoluble fibers.
Claim 3
Dependent Claim
19 words
A method as claimed in claim 1, wherein the molar ratio of styrene to comonomer is 95/5 - 40/60.
Claim 4
Dependent Claim
21 words
A method as claimed in claim 1, wherein the melt spinning is effected at a temperature of 100° to 250° C.
Claim 5
Dependent Claim
19 words
A method as claimed in claim 1, wherein the molecular weight of the styrene copolymer is 20,000 - 100,000.
Claim 6
Dependent Claim
22 words
A method as claimed in claim 1, wherein the cross-linking agent is used at a concentration of 0.5 - 60% by weight.
Claim 7
Dependent Claim
16 words
A method as claimed in claim 5, wherein said concentration is 5 - 40% by weight.
Claim 8
Dependent Claim
22 words
A method as claimed in claim 1, wherein said melt spinning is effected at a draft ratio of 500 - 1,000 m/min.
Claim 9
Dependent Claim
28 words
A method as claimed in claim 1, wherein said cross-linking agent contains 5 - 30% by weight of a ketone or an aromatic solvent as a swelling agent.
Claim 10
Dependent Claim
35 words
A method as claimed in claim 1, wherein X is haloalkyl and said cross-linking agent is selected from the group consisting of an amino compound, a diol compound, a phosphorus compound and a sulfur compound.
Claim 11
Dependent Claim
44 words
A method as claimed in claim 1, wherein X is amino and said cross-linking agent is selected from the group consisting of an aldehyde compound, a diisocyanate compound, a compound containing at least two haloalkyl groups, dicarboxylic acid compound and dicarboxylic acid dichloride compound.
Claim 12
Dependent Claim
35 words
A method as claimed in claim 1, wherein X is carboxyl and said cross-linking agent is selected from the group consisting of bisdiglycidyl ether, a compound containing at least two haloalkyl groups and amino compound.
Claim 13
Dependent Claim
31 words
A method as claimed in claim 1, wherein X is carboxylic acid halide and said cross-linking agent is selected from the group consisting of an amino compound and a diol compound.
Claim 14
Dependent Claim
30 words
A method as claimed in claim 1, wherein X is hydroxyl and said cross-linking agent is selected from the group consisting of a diisocyanate compound and a dicarbonic acid dichloride.
Claim 15
Dependent Claim
19 words
A method as claimed in claim 1, wherein X is amido and said cross-linking agent is an aldehyde compound.
Claim 16
Dependent Claim
19 words
A method as claimed in claim 1, wherein X is nitrile and said cross-linking agent is an aminoxime compound.
Claim 17
Dependent Claim
29 words
A method as claimed in claim 1, wherein X is halogen and said cross-linking agent is selected from the group consisting of an amino compound and a sulfur compound.
Claim 18
Independent Claim
195 words
A method for producing infusible and insoluble styrene copolymer fibers which comprises blending styrene homopolymer with a styrene copolymer obtained by copolymerizing monomers consisting essentially of styrene and at least one ethylenically unsaturated comonomer having one of the following two formulae ##STR3## wherein R 1 is hydrogen, alkyl having 1 to 4 carbon atoms, halogen, carboxyl or the ester group thereof, R 2 is hydrogen, alkyl having 1 to 4 carbon atoms or phenyl, X is haloalkyl, amino, carboxyl, carboxylic acid ester, carboxylic acid halide, hydroxyl, amido, nitrile or halogen, n is 0 or 1 and m is 1, 2 or 3, melt spinning the resulting blend into fibers, immersing said fibers in a liquid solution of a cross-linking agent, said solution having an initial temperature of from 20° to 30° C., then raising the temperature of said solution to from 50° to 120° C. in a period of 0.5 to 10 hours and then maintaining the solution at the latter temperature for 1 to 20 hours while maintaining said fibers immersed in said solution to complete the cross linking throughout the entire cross section of the fibers whereby to obtain infusible and insoluble fibers.
Claim 19
Independent Claim
195 words
A method for producing infusible and insoluble styrene copolymer fibers which comprises blending styrene homopolymer with a styrene copolymer obtained by copolymerizing monomers consisting essentially of styrene and at least one ethylenically unsaturated comonomer having one of the following two formulae ##STR3## wherein R 1 is hydrogen, alkyl having 1 to 4 carbon atoms, halogen, carboxyl or the ester group thereof, R 2 is hydrogen, alkyl having 1 to 4 carbon atoms or phenyl, X is haloalkyl, amino, carboxyl, carboxylic acid ester, carboxylic acid halide, hydroxyl, amido, nitrile or halogen, n is 0 or 1 and m is 1, 2 or 3, melt spinning the resulting blend into fibers, immersing said fibers in a liquid solution of a cross-linking agent, said solution having an initial temperature of from 20° to 30° C., then raising the temperature of said solution to from 50° to 120° C. in a period of 0.5 to 10 hours and then maintaining the solution at the latter temperature for 1 to 20 hours while maintaining said fibers immersed in said solution to complete the cross linking throughout the entire cross section of the fibers whereby to obtain infusible and insoluble fibers.
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) | 1980-02-08 | 1980-08-09 | 1981-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-08 | 1984-08-09 | 1985-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-08 | 1988-08-09 | 1989-02-08 | $7700.00 | Window Closed / Lapsed |