US3887676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinylchloride graft vinyl chloride onto amido backbone and polyvinyl alcohol as film or fiber
Assignee: Kohjin Holdings Co Ltd
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Filing: 1973-04-05
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Granted: 1975-06-03
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Expires: 1993-04-05
Abstract
Abstract New polymeric materials in the form of fibers and films composed of polyvinyl alcohol, polyvinyl chloride and a water-soluble amido-polymer having a portion of the polyvinyl chloride grafted thereon and which contains at least about 80 mole percent amido or methylolated amido groups. These materials possess excellent light and heat resistance. Also disclosed is a process for preparing these materials comprising adding a water-soluble catalyst and emulsifier to an aqueous solution of the amido-polymer and subjecting the mixture to emulsion polymerization with added vinyl chloride. Thereafter, polyvinyl alcohol is added as a matrix to the emulsion to make a dope which is then coagulated.
Inventors
- 👤 Seizo Okamura
- 👤 Tomoaki Tagawa
- 👤 Kazuo Yagami
- 👤 Kazuto Matsuo
- 👤 Mitsuo Sakabe
- 👤 Tsutomu Sogo
- 👤 Mikio Korematsu
- 👤 Widow And Legal Succ Korematsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:26
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/12; C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L29/00; C08L29/02; C08L29/04; C08L51/00; C08L51/003; D01; D01F; D01F6/00; D01F6/44; D01F6/48; D01F6/50; C08L33/00; C08L33/24; C08L33/26
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
150 words
A METHOD FOR PRODUCING A FIBER OR FILM WHICH COMPRISES EMULSION POLYMERIZING VINYL CHLORIDE IN AN AQUEOUS SOLUTION OF A WATER-SOLUBLE AMIDO-TERPOLYMER CONSISTING OF ACRYLAMIDE, DIACETONE ACRYLAMIDE AND SODIUM METHALLYLSULFONATE, SAID AMIDO-TERPOLYMER CONTAINING AT LEAST 80 MOLE PERCENT AMIDOGROUPS, IN THE PRESENCE OF A CATALYST AND AN EMULSIFYING AGENT WHEREBY AN AQUEOUS EMULSION OF POLYVINYL CHLORIDE CONTAINING A GRAFT POLYMER, IN WHICH A PART OF THE VINYL CHLORIDE IS GRAFTED ONTO THE WATER-SOLUBLE AMIDO-TERPOLYMER, IS OBTAINED WHEREIN THE AMOUNT OF SAID AMIDO-TERPOLYMER IS LESS THAN 20 PERCENT BY WEIGHT BASED ON THE TOTAL WEIGHT OF THE GRAFTED AND UNGRAFTED POLYVINYL CHLORIDE AND THEN ADDING TO THE AQUEOUS EMULSION THUS OBTAINED, 40 TO 150 PERCENT BY WEIGHT OF POLYVINYL ALCOHOL BASED ON THE TOTAL WEIGHT OF THE GRAFTED AND UNGRAFTED POLYVINYL CHLORIDE IN THE EMULSION TO FORM A SPINNING DOPE, AND THEN COAGULATING THE SPINNING DOPE INTO A FIBER OR FILM.
Claim 2
Independent Claim
150 words
A METHOD FOR PRODUCING A FIBER OR FILM WHICH COMPRISES EMULSION POLYMERIZING VINYL CHLORIDE IN AN AQUEOUS SOLUTION OF A WATER-SOLUBLE AMIDO-TERPOLYMER CONSISTING OF ACRYLAMIDE, DIACETONE ACRYLAMIDE AND SODIUM METHALLYLSULFONATE, SAID AMIDO-TERPOLYMER CONTAINING AT LEAST 80 MOLE PERCENT AMIDOGROUPS, IN THE PRESENCE OF A CATALYST AND AN EMULSIFYING AGENT WHEREBY AN AQUEOUS EMULSION OF POLYVINYL CHLORIDE CONTAINING A GRAFT POLYMER, IN WHICH A PART OF THE VINYL CHLORIDE IS GRAFTED ONTO THE WATER-SOLUBLE AMIDO-TERPOLYMER, IS OBTAINED WHEREIN THE AMOUNT OF SAID AMIDO-TERPOLYMER IS LESS THAN 20 PERCENT BY WEIGHT BASED ON THE TOTAL WEIGHT OF THE GRAFTED AND UNGRAFTED POLYVINYL CHLORIDE AND THEN ADDING TO THE AQUEOUS EMULSION THUS OBTAINED, 40 TO 150 PERCENT BY WEIGHT OF POLYVINYL ALCOHOL BASED ON THE TOTAL WEIGHT OF THE GRAFTED AND UNGRAFTED POLYVINYL CHLORIDE IN THE EMULSION TO FORM A SPINNING DOPE, AND THEN COAGULATING THE SPINNING DOPE INTO A FIBER OR FILM.
Claim 3
Independent Claim
150 words
A method for producing a fiber or film which comprises emulsion polymerizing vinyl chloride in an aqueous solution of a water-soluble amido-terpolymer consisting of acrylamide, diacetone acrylamide and sodium methallylsulfonate, said amido-terpolymer containing at least 80 mole percent amido-groups, in the presence of a catalyst and an emulsifying agent whereby an aqueous emulsion of polyvinyl chloride containing a graft polymer, in which a part of the vinyl chloride is grafted onto the water-soluble amido-terpolymer, is obtained wherein the amount of said amido-terpolymer is less than 20 percent by weight based on the total weight of the grafted and ungrafted polyvinyl chloride and then adding to the aqueous emulsion thus obtained, 40 to 150 percent by weight of polyvinyl alcohol based on the total weight of the grafted and ungrafted polyvinyl chloride in the emulsion to form a spinning dope, and then coagulating the spinning dope into a fiber or film.
Claim 4
Independent Claim
150 words
A method for producing a fiber or film which comprises emulsion polymerizing vinyl chloride in an aqueous solution of a water-soluble amido-terpolymer consisting of acrylamide, diacetone acrylamide and sodium methallylsulfonate, said amido-terpolymer containing at least 80 mole percent amido-groups, in the presence of a catalyst and an emulsifying agent whereby an aqueous emulsion of polyvinyl chloride containing a graft polymer, in which a part of the vinyl chloride is grafted onto the water-soluble amido-terpolymer, is obtained wherein the amount of said amido-terpolymer is less than 20 percent by weight based on the total weight of the grafted and ungrafted polyvinyl chloride and then adding to the aqueous emulsion thus obtained, 40 to 150 percent by weight of polyvinyl alcohol based on the total weight of the grafted and ungrafted polyvinyl chloride in the emulsion to form a spinning dope, and then coagulating the spinning dope into a fiber or film.
Claim 5
Independent Claim
148 words
A method for producing a fiber or film which comprises emulsion polymerizing vinyl chloride in an aqueous solution of a water-soluble amido-copolymer consisting of methylolated acrylamide and sodium alkylsulfonate, said amido-copolymer containing at least 80 mole percent amido-groups, in the presence of a catalyst and an emulsifying agent whereby an aqueous emulsion of polyvinyl chloride containing a graft polymer, in which a part of vinyl chloride is grafted onto the water-soluble amido-copolymer, is obtained wherein the amount of said amido-copolymer is less than 20 percent by weight based on the total weight of the grafted and ungrafted polyvinyl chloride and then adding to the aqueous emulsion thus obtained, 40 to 150 percent by weight of polyvinyl alcohol based on the total weight of the grafted and ungrafted polyvinyl chloride in the emulsion to form a spinning dope, and then coagulating the spinning dope into a fiber or film.
Claim 6
Independent Claim
148 words
A method for producing a fiber or film which comprises emulsion polymerizing vinyl chloride in an aqueous solution of a water-soluble amido-copolymer consisting of methylolated acrylamide and sodium alkylsulfonate, said amido-copolymer containing at least 80 mole percent amido-groups, in the presence of a catalyst and an emulsifying agent whereby an aqueous emulsion of polyvinyl chloride containing a graft polymer, in which a part of vinyl chloride is grafted onto the water-soluble amido-copolymer, is obtained wherein the amount of said amido-copolymer is less than 20 percent by weight based on the total weight of the grafted and ungrafted polyvinyl chloride and then adding to the aqueous emulsion thus obtained, 40 to 150 percent by weight of polyvinyl alcohol based on the total weight of the grafted and ungrafted polyvinyl chloride in the emulsion to form a spinning dope, and then coagulating the spinning dope into a fiber or film.
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |