Patent US2068323A successfully refreshed from Google Patents.
Patent US3941860A successfully refreshed from Google Patents.
US3941860A
Expired / Lapsed
US
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Polyvinylidene fluoride containing threads, fibers and films of good dye affinity, and process for obtaining them
Assignee: Rhone Poulenc Textile SA
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Filing: 1974-06-03
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Granted: 1976-03-02
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Expires: 1994-06-03
Abstract
Abstract The invention relates to threads, fibers or films comprising polyvinylidene fluoride, with good dye affinity for plastosoluble and cationic dyestuffs. More particularly, the invention relates to threads, fibers or films formed of a mixture of vinylidene fluoride homopolymer and of a copolymer containing at least 60% by weight of methyl methacrylate units and 5 to 40% by weight of units of at least one acid ethylenic comonomer, copolymerizable with methyl methacrylate. The threads and fibers in accordance with the invention can be used in particular in the field of textiles.
Inventors
- 👤 Paul Couchoud
- 👤 Edouard Grimaud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:02
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/16; D; D01; D01F; D01F6/00; D01F6/44; D01F6/48; D06; D06P; D06P3/00; D06P3/002; D06P3/004
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
76 words
Threads, fibers and films of good dye affinity for plastosoluble and cationic dyestuffs, comprising a mixture formed of a vinylidene fluoride homopolymer and a copolymer containing at least 60% by weight methyl methacrylate units and 5 to 40% by weight of units of a sulfonic acid ethylenic monomer selected from the group consisting of acrylamido-2-methyl-2-propane sulfonic acid and sulfoethyl methacrylate, or the alkaline salt, said mixture containing at least 40 acid milliequivalents per kg of polymer.
Claim 2
Dependent Claim
76 words
Threads, fibers and films of good dye affinity for plastosoluble and cationic dyestuffs, comprising a mixture formed of a vinylidene fluoride homopolymer and a copolymer containing at least 60% by weight methyl methacrylate units and 5 to 40% by weight of units of a sulfonic acid ethylenic monomer selected from the group consisting of acrylamido-2-methyl-2-propane sulfonic acid and sulfoethyl methacrylate, or the alkaline salt, said mixture containing at least 40 acid milliequivalents per kg of polymer.
Claim 3
Dependent Claim
63 words
A spinnable and film formable compatible mixture of vinylidene fluoride homopolymer and a copolymer containing at least 60% by weight methyl methacrylate units and 5 to 40% by weight of a sulfonic acid ethylenic monomer selected from the group consisting of acrylamido-2-methyl-2-propane sulfonic acid and sulfoethyl methacrylate, or the alkaline salt, said mixture containing at least 40 acid milliequivalents per kg of polymer.
Claim 4
Dependent Claim
63 words
A spinnable and film formable compatible mixture of vinylidene fluoride homopolymer and a copolymer containing at least 60% by weight methyl methacrylate units and 5 to 40% by weight of a sulfonic acid ethylenic monomer selected from the group consisting of acrylamido-2-methyl-2-propane sulfonic acid and sulfoethyl methacrylate, or the alkaline salt, said mixture containing at least 40 acid milliequivalents per kg of polymer.
Claim 5
Dependent Claim
34 words
Threads, fibers and films according to claim 1, wherein the copolymer is obtained from at least one other acid or non-acid comonomer in addition to the methyl methacrylate and the sulfonic acid ethylenic monomer.
Claim 6
Dependent Claim
23 words
Threads, fibers and films according to claim 1, wherein the polyvinylidene fluoride has a flow index of at least 10, measured at 250°C.
Claim 7
Dependent Claim
20 words
Threads, fibers and films according to claim 1, wherein the polyvinylidene fluoride has a flow index of 100 to 5,000.
Claim 8
Dependent Claim
19 words
Threads, fibers and films according to claim 1, having 40 to 100 acid milliequivalents per kg of polymer mixture.
Claim 9
Dependent Claim
75 words
A process for the producing of threads, fibers or films according to claim 1, comprising spinning a composition in an aprotic polar organic solvent of a mixture of polyvinylidene fluoride and of a copolymer containing at least 60% by weight methyl methacrylate units and 5 to 40% by weight of units of at least one acid ethylenic monomer copolymerizable with it and thereafter drawing the filaments in one or more steps before or after washing.
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) | 1979-03-02 | 1979-09-01 | 1980-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-02 | 1983-09-01 | 1984-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-02 | 1987-09-01 | 1988-03-02 | $7700.00 | Window Closed / Lapsed |