US4155953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of modified polychlorotrifluoroethylene
Assignee: Daikin Industries Ltd
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Filing: 1976-10-29
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Granted: 1979-05-22
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Expires: 1996-10-29
Abstract
Abstract A process for production of modified polychlorotrifluoroethylene having a low crystallinity with a good processability, which comprises polymerizing, as a monomeric component, chlorotrifluoroethylene or its mixture with at least one of other polymerizable monomers in an amount of not more than about 50 mol% based on the monomeric component in the presence of a fluorine-containing elastomeric polymer, preferably in the coexistence of water and 1,1,2-trichloro-1,2,2-trifluoroethane.
Inventors
- 👤 Masayoshi Tatemoto
- 👤 Tsuneo Nakagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:36
CPC Classifications
C; C08; C08F; C08F255/00; C08F259/00; C08F259/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
170 words
A process for production of modified polychlorotrifluorethylene having a low crystallinity and good processability, which comprises polymerizing, as a monomeric component, chlorotrifluoroethylene or its mixture with at least one of other polymerizable monomers in an amount of not more than 50 mol % based on the monomeric component in the presence of a fluorine-containing elastomeric polymer selected from the group consisting of a copolymer of tetrafluoroethylene and an olefin selected from the group consisting of propene, butene-1 and isobutene in a molar ratio of 70:30 to 30:70, a copolymer of vinylidene fluoride and hexafluoropropene in a molar ratio of 90:50to 50:50 and a copolymer of vinylidene fluoride and chlorotrifluoroethylene in a molar ratio of 90:10to 50:50, and those ternary polymers corresponding to said copolymers with tetrafluoroethylene as a third monomeric unit in an amount of not more than 20 mol % of the total monomer units, said elastomeric polymer being prosent in an amount of about 0.1 to 20% by weight based on the amount of the produced, modified polychlorotrifluoroethylene.
Claim 2
Dependent Claim
170 words
A process for production of modified polychlorotrifluorethylene having a low crystallinity and good processability, which comprises polymerizing, as a monomeric component, chlorotrifluoroethylene or its mixture with at least one of other polymerizable monomers in an amount of not more than 50 mol % based on the monomeric component in the presence of a fluorine-containing elastomeric polymer selected from the group consisting of a copolymer of tetrafluoroethylene and an olefin selected from the group consisting of propene, butene-1 and isobutene in a molar ratio of 70:30 to 30:70, a copolymer of vinylidene fluoride and hexafluoropropene in a molar ratio of 90:50to 50:50 and a copolymer of vinylidene fluoride and chlorotrifluoroethylene in a molar ratio of 90:10to 50:50, and those ternary polymers corresponding to said copolymers with tetrafluoroethylene as a third monomeric unit in an amount of not more than 20 mol % of the total monomer units, said elastomeric polymer being prosent in an amount of about 0.1 to 20% by weight based on the amount of the produced, modified polychlorotrifluoroethylene.
Claim 3
Dependent Claim
34 words
The process according to claim 1, wherein the fluorine-containing elastomeric polymer has a number average molecular weight of about 10,000 to 500,000 obtained by the intrinsic viscosity method, determined in methylethylketone at 35° C.
Claim 4
Dependent Claim
19 words
The process according to claim 1, wherein the polymerization is carried out by the application of a radical source.
Claim 5
Dependent Claim
27 words
The process according to claim 3, wherein the radical source is the one which can induce the polymerization at a temperature of about -30° to 45° C.
Claim 6
Dependent Claim
19 words
The process according to claim 1, wherein the polymerization is carried out in the presence of water and 1,1,2-trichloro-1,2,2-trifluoroethane.
Claim 7
Dependent Claim
27 words
The process according to claim 5, wherein the weight ratio of the monomeric component, the fluorine-containing elastomeric polymer, water and 1,1,2-trichloro-1,2,2-trifluoroethane is about 1:0.001- 1:0- 7:0- 2.
Claim 8
Dependent Claim
21 words
The process according to claim 1, wherein the polymerization is carried out at a temperature of about -30° to 45° C.
Claim 9
Dependent Claim
20 words
The process according to claim 1, wherein the produced modified polychlorotrifluoroethylene is extracted by treatment with an inert organic solvent.
References Cited (Backward Citations)
US3345317A
Cited
US3798287A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-21 | 1982-11-20 | 1983-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-21 | 1986-11-20 | 1987-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-21 | 1990-11-20 | 1991-05-22 | $7700.00 | Window Closed / Lapsed |