US3626049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing cross-linked acrylic fibers or films
Assignee: Toyobo Co Ltd
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Filing: 1968-08-19
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Granted: 1971-12-07
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Expires: 1988-08-19
Abstract
Abstract Cross-linked acrylic fibers or films which are of improved hot water-resistance and have a silky hand or feel, are obtained by (i) preparing an acidic solution of a copolymer obtained by copolymerizing in an acidic medium (a) a vinyl monomeric material consisting mainly of acrylonitrile and (b) a polymerizable unsaturated monomer having a halogenated s-triazinyl group or halogenated pyrimidinyl group in the presence of (c) a polymerizable unsaturated monomer having a group containing active hydrogen, a group capable of forming active hydrogen, a pyridyl group, a pyrazinyl group or quinolyl group, and/or (d) protein, and then (ii) extruding a very stable acidic solution of the resulting polymer into the form of fibers or films, and then heat-treating. The obtained fibers, for example, are useful in making woven or knitted fabrics of correspondingly superior properties.
Inventors
- 👤 Akira Yamamoto
- 👤 Kunio Nakaoji
- 👤 Kunio Oohara
- 👤 Zenjiro Momiyama
- 👤 Heiichiro Murakami
- 👤 Akira Tomita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:53
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; C08F220/44; C08F289/00; D; D01; D01F; D01F6/00; D01F6/28; D01F6/38; D01F6/44; D01F6/54
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
43 words
A process according to claim 1 wherein the polymerization of monomers (a) and (b) takes place in the presence of a protein selected from the group consisting of cow milk casein, yeast protein, gelatin, corn protein, soybean protein, cyanoethylated protein or carbamylethylated protein.
Claim 2
Dependent Claim
26 words
A process as claimed in claim 1 wherein the polymerizable unsaturated monomer having halogenated s-triazinyl group is 2-allylamino-4,6-dichloro-s-triazine, 2-amino-4-allyloxy-6-chloro-s-triazine, 2-(p-vinylanilino)-4,6-dichloro-s-triazine, 2-acryloyloxyethylene amino-4,6-dichloro-s-triazine, 2-vinyloxyethylene amino-4,6-dichloro-s-triazine or 2-(p-vinylphenoxy)-4,6-dichloro-s-triazine.
Claim 3
Dependent Claim
25 words
A process according to claim 1 wherein the polymerizable unsaturated monomer having halogenated pyrimidinyl group is 2-allylamino-4,6-dichloropyrimidine, 2-amino-4-allyloxy-6chloropyrimidine, 2-(p-vinylanilino)-4,6-dichloropyrimidine, 2-acryloyloxyethylene amino-4,6-dichloropyrimidine, 2-vinyloxyethylene amino-4,6-dichloropyrimidine or 2-(p-vinylphenoxy)-4,6-dichloropyrimidine.
Claim 4
Dependent Claim
23 words
A process according to claim 1 wherein the protein is selected from the class consisting of natural proteins, modified proteins and synthetic proteins.
Claim 5
Dependent Claim
104 words
A process according to claim 1 wherein the polymerizable unsaturated monomer having a group containing active hydrogen, a group capable of forming active hydrogen, a pyridyl group, pyrazinyl group or quinolyl group is allylamine, methallylamine, allylmethylamine, allylethylamine, 1-(N-ethylamino)-3-butene, Beta -aminoethyl acrylate, Beta -aminoethyl methacrylate, Beta -(N-methylamino)ethyl acrylate, Beta -(N-ethylamino) ethyl acrylate, Beta -(N-methylamino)ethyl methacrylate, Beta -(N-ethylamino)ethyl methacrylate, p-aminostyrene, allyl alcohol, methallyl alcohol, 3-butene-1-o1, 3-butene-2-ol, 4-pentene-2ol, Beta -hydroxyethyl acrylate, Beta -hydroxyethyl methacrylate, glycidyl methacrylate, glycidyl acrylate, ethylene glycol monovinyl ether, diethylene glycol monovinyl ether, 2,3-dihydroxypropyl methacrylate, 1-o-methacryloyl-D-glucose, 3-o-methacryloyl-D-glucose, 6-o-methacryloyl-D-glucose, 1-o-methacryloyl-D-galactose, 6-o-methacryloyl-D-galactose, 2-N-methacryloyl glucosamine, 1-acrylamide-1-dioxy-glucitol, 1-o-p-vinylphenyl glucose, p-hydroxystyrene, vinyl pyridine, 2-methyl-5-vinyl pyridine, vinyl pyrazine, or 2-vinyl-quinoline.
Claim 6
Dependent Claim
19 words
A process according to claim 1 wherein the vinyl monomeric material contains at least 70 percent by weight acrylonitrile.
Claim 7
Dependent Claim
37 words
A process according to claim 1 wherein the content of the unsaturated monomer component having a group selected from halogenated s-triazinyl group and halogenated pyrimidinyl group in the resulting polymer is 0.03 to 10 percent by weight.
Claim 8
Dependent Claim
23 words
A process according to claim 1 wherein the content of the protein in the resulting acrylic polymer is 5- 50 percent by weight.
Claim 9
Dependent Claim
52 words
A process according to claim 1 wherein the content, in the resulting Acrylic polymer, of said unsaturated monomer component having a group containing active hydrogen, a group capable of forming active hydrogen, a pyridyl group, a pyrazinyl group or a quinolyl group is 0.3 to 10 percent by weight on the polymer.
Claim 10
Dependent Claim
23 words
A process according to claim 1 wherein the acidic medium is an aqueous solution of more than 40 percent by weight zinc chloride.
Claim 11
Dependent Claim
44 words
A process according to claim 1 wherein said acidic medium is dimethyl sulfoxide, dimethyl formamide, ethylene carbonate, an aqueous solution of ethylene carbonate, deoxygenated water, a concentrated aqueous solution of urea, or formic acid, all being adjusted to a pH not higher than 6.
Claim 12
Dependent Claim
19 words
A process according to claim 1 wherein the coagulating bath is adjusted to a pH not higher than 6.
Claim 13
Dependent Claim
37 words
A process according to claim 1 wherein the stretching is conducted in heated steam, hot water or a hot bath containing sodium sulfate, after an acidic substance in the fibers or films has been removed by washing.
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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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |