US4243770A
Expired / Lapsed
US
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Cross linkable fluorine-containing polymer and its production
Assignee: Daikin Industries Ltd
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Filing: 1978-04-07
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Granted: 1981-01-06
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Expires: 1998-04-07
Abstract
Abstract An easily cross linkable fluorine-containing polymer substantially comprising: (1) a polymeric chain comprising one or more polymer segments, of which at least one polymer segment consisting of units of vinylidene fluoride alone or of units of vinylidene fluoride and one or more of other fluoroolefins, and (2) at least one iodine atom liberated from an iodinated compound of the formula: RIx (wherein R is a saturated or unsaturated fluorohydrocarbon or chlorofluorohydrocarbon residue having 1 to 8 carbon atoms and x is an integer of 1 or 2 corresponding to the bonding valency of the residue R) in an amount of 0.001 to 10% by weight based on the polymer and (3) a fragment of the iodinated compound excluding the said liberated iodine atom therefrom, which are bonded to the polymeric chain and being prepared by polymerizing vinylidene fluoride with or without one or more of the other fluoroolefins in the presence of a radical producing source and the iodinated compound or its reaction product with the said monomer(s) in one or more steps, the other fluoroolefins being selected from the group consisting of tetrafluoroethylene, chlorotrifluoroethylene, trifluoroethylene, vinyl fluoride, hexafluoropropylene, pentafluoropropylene, perfluoro(methyl vinyl ether), perfluoro(ethyl vinyl ether) and perfluoro(propyl vinyl ether).
Inventors
- 👤 Masayoshi Tatemoto
- 👤 Takeshi Suzuki
- 👤 Masayasu Tomoda
- 👤 Yasuyoshi Furukawa
- 👤 Yutaka Ueta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:56
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/18; C08F14/00; C08F14/18; C08F14/22; C08F2438/00; C08F2438/01
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
230 words
An easily cross linkable free radical catalyzed fluorine-containing polymer substantially comprising: (1) a polymeric chain comprising one or more polymer segments, of which at least one polymer segment consists of units of vinylidene fluoride alone or units of vinylidene fluoride and one or more other fluoroolefins, the content of vinylidene fluoride units being not less than about 10 mol% based on the polymer segment and not less than 10% by weight based on the polymeric chain, and (2) at least one iodine atom liberated from an iodinated compound of the formula: RI x (wherein R is a saturated or unsaturated fluorohydrocarbon or chlorofluorohydrocarbon residue having 1 to 8 carbon atoms and x is an integer of 1 or 2 corresponding to the bonding valency of the residue R) in an amount of 0.001 to 10% by weight based on the polymer and bonded at a terminal position of the polymeric chain and (3) a fragment of the iodinated compound excluding the said liberated iodine atom therefrom which are bonded to the polymeric chain and being prepared by polymerizing vinylidene fluoride with or without one or more of the other fluoroolefins in the presence of a radical producing source and the iodinated compound (s), the other fluoroolefins being selected from the group consisting of tetrafluoroethylene, chlorotrifluoroethylene, trifluoroethylene, vinyl fluoride, hexafluoropropylene, pentafluoropropylene, perfluoro(methyl vinyl ether), perfluoro(ethyl vinyl ether) and perfluoro-(propyl vinyl ether).
Claim 2
Dependent Claim
230 words
An easily cross linkable free radical catalyzed fluorine-containing polymer substantially comprising: (1) a polymeric chain comprising one or more polymer segments, of which at least one polymer segment consists of units of vinylidene fluoride alone or units of vinylidene fluoride and one or more other fluoroolefins, the content of vinylidene fluoride units being not less than about 10 mol% based on the polymer segment and not less than 10% by weight based on the polymeric chain, and (2) at least one iodine atom liberated from an iodinated compound of the formula: RI x (wherein R is a saturated or unsaturated fluorohydrocarbon or chlorofluorohydrocarbon residue having 1 to 8 carbon atoms and x is an integer of 1 or 2 corresponding to the bonding valency of the residue R) in an amount of 0.001 to 10% by weight based on the polymer and bonded at a terminal position of the polymeric chain and (3) a fragment of the iodinated compound excluding the said liberated iodine atom therefrom which are bonded to the polymeric chain and being prepared by polymerizing vinylidene fluoride with or without one or more of the other fluoroolefins in the presence of a radical producing source and the iodinated compound (s), the other fluoroolefins being selected from the group consisting of tetrafluoroethylene, chlorotrifluoroethylene, trifluoroethylene, vinyl fluoride, hexafluoropropylene, pentafluoropropylene, perfluoro(methyl vinyl ether), perfluoro(ethyl vinyl ether) and perfluoro-(propyl vinyl ether).
Claim 3
Dependent Claim
27 words
The fluorine-containing polymer according to claim 1, wherein the polymer chain consists of only one polymer segment having a number average molecular weight of 8,000 to 400,000.
Claim 4
Dependent Claim
29 words
The fluorine-containing polymer according to claim 1, wherein the polymer chain consists of two to four polymer segments, has a number average molecular weight of about 8,000 to 4,000,000.
Claim 5
Dependent Claim
31 words
The fluorine-containing polymer according to claim 1, wherein the amount of the iodine atoms bonded to the polymer chain is from about 0.01 to 5% by weight based on the polymer.
Claim 6
Dependent Claim
16 words
The fluorine-containing polymer according to claim 1, wherein R is a saturated fluorohydrocarbon or chlorofluorohydrocarbon group.
Claim 7
Dependent Claim
23 words
The fluorine-containing polymer according to claim 1, wherein R is an unsaturated fluorohydrocarbon or chlorofluorohydrocarbon group and x is an integer of 1.
Claim 8
Dependent Claim
69 words
The fluorine-containing polymer according to claim 1, wherein the polymeric chain consists of the segment of a homopolymer of vinylidene fluoride or a random copolymer of vinylidene fluoride with one or more of the other fluoroolefins, contains units of vinylidene fluoride in an amount of not less than about 10 mol % based on the polymeric chain and has a number average molecular weight of about 8,000 to 400,000.
Claim 9
Dependent Claim
31 words
A cross linkable composition which comprises a mixture of (A) the fluorine-containing polymer according to claim 1 and (B) at least one cross linking agent in a weight proportion of 100:0.05-10.
Claim 10
Dependent Claim
68 words
The cross linkable composition according to claim 8, wherein the linking agent is selected from the group consisting of organic peroxides, polyamines and their salts polyhydroxy compounds having an enol type hydroxyl group and dihydroxy compounds of the formula: R"(CH 2 OH) 2 (wherein R" is a polyfluoroalkylene or perchlorofluoroalkylene group having 1 to 20 carbon atoms) and their alkali metal salts, and polythiols and their alkali metals.
Claim 11
Dependent Claim
17 words
The cross linkable composition according to claim 9, wherein the cross linking agent is an organic peroxide.
Claim 12
Dependent Claim
19 words
The cross linkable composition according to claim 9, wherein the cross linking agent is a polyamine or its salt.
Claim 13
Dependent Claim
53 words
The cross linkable composition according to claim 9, wherein the cross linking agent is a polyhydroxy compound having an enol type hydroxyl group or a dihydroxy compound of the formula: R"(CH 2 OH) 2 (wherein R" is a polyfluoroalkylene or perchlorofluoroalkylene group having 1 to 20 carbon atoms), or their alkali metal salt.
Claim 14
Dependent Claim
15 words
The cross linkable composition according to claim 8, which further comprises an acid accepting agent.
Claim 15
Dependent Claim
20 words
The cross linkable composition according to claim 13, wherein the acid accepting agent is a divalent metal oxide or hydroxide.
Claim 16
Dependent Claim
14 words
The cross linkable composition according to claim 8, which further comprises an accelerating agent.
Claim 17
Dependent Claim
41 words
The cross linkable composition according to claim 15, wherein the accelerating agent is selected from the group consisting of tertiary amines, trisubstituted amidines and pentasubstituted guanidines, and their organic acid salts, inorganic acid salts, quaternary ammonium salts and quaternary phosphonium salts.
Claim 18
Dependent Claim
20 words
The cross linkable composition according to claim 8, which further comprises a cross linking aid or a co-cross linking agent.
Claim 19
Dependent Claim
22 words
The cross linkable composition according to claim 17, wherein the cross linking aid or the co-cross linking agent is a polyfunctional compound.
Claim 20
Dependent Claim
33 words
The cross linkable composition according to claim 8, which further comprises an organic peroxide as the cross linking agent and a polyfunctional compound as the cross linking aid or the co-cross linking agent.
Claim 21
Dependent Claim
32 words
The fluorine-containing polymer according to claim 1, wherein the iodide compound is the one bearing at least one fluorine atom or perfluorohydrocarbon residue on the carbon atom adjacent to the iodine atom.
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) | 1984-01-06 | 1984-07-07 | 1985-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-06 | 1988-07-07 | 1989-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-06 | 1992-07-07 | 1993-01-06 | $7700.00 | Window Closed / Lapsed |