US4361678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid fluorine-containing polymer and its production with iodinated compound
Assignee: Daikin Industries Ltd
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Filing: 1980-10-17
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Granted: 1982-11-30
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Expires: 2000-10-17
Abstract
Abstract A process for producing a readily crosslinkable liquid, fluorine-containing polymer having a narrow range of molecular weight distribution and containing iodine in the molecule in an amount of 1 to 30% by weight based on the weight of the polymer, which comprises polymerizing vinylidene fluoride and at least one other fluoroolefin in the presence of a radical-producing source and an iodinated compound of the formula: Rf/Ix wherein Rf is a saturated perfluorocarbon group, a saturated perfluorochlorocarbon group or a saturated fluorochlorohydrocarbon group and x is an integer of not less than 1 corresponding to the bonding valency of Rf while maintaining the proportion of the mole number of the monomeric components (M) to the mole number of the iodinated compound (I) in a range between 10 and 1,200.
Inventors
- 👤 Masayoshi Tatemoto
- 👤 Shigeru Morita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:54
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/22
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
143 words
A process for producing a readily crosslinkable liquid fluorine-containing polymer having a number average molecular weight of 900 to 10,000 and containing iodine in the molecule in an amount of 1 to 30% by weight based on the weight of the polymer, which comprises polymerizing vinylidene fluoride and at least one other fluoroolefin in the presence of a radical-producing source and an iodinated compound of the formula RfI x , wherein Rf is selected from at least one member of the group consisting of a saturated perfluorocarbon group, a saturated perfluorochlorocarbon group or a saturated fluorochlorohydrocarbon group and x is an integer of not less than 1 corresponding to the bonding valency of Rf while maintaining the proportion of the mole number of the monomeric components (M) to the mole number of the iodinated compound (I) in a range between 10 and 1,200.
Claim 2
Dependent Claim
143 words
A process for producing a readily crosslinkable liquid fluorine-containing polymer having a number average molecular weight of 900 to 10,000 and containing iodine in the molecule in an amount of 1 to 30% by weight based on the weight of the polymer, which comprises polymerizing vinylidene fluoride and at least one other fluoroolefin in the presence of a radical-producing source and an iodinated compound of the formula RfI x , wherein Rf is selected from at least one member of the group consisting of a saturated perfluorocarbon group, a saturated perfluorochlorocarbon group or a saturated fluorochlorohydrocarbon group and x is an integer of not less than 1 corresponding to the bonding valency of Rf while maintaining the proportion of the mole number of the monomeric components (M) to the mole number of the iodinated compound (I) in a range between 10 and 1,200.
Claim 3
Dependent Claim
30 words
The process according to claim 1, wherein Rf has fluorine atom(s) and/or perfluorocarbon group(s) on all the remaining bonds of the carbon atom to which an iodine atom is bonded.
Claim 4
Dependent Claim
40 words
The process according to claim 1, wherein the other fluoroolefin is selected from at least one member of the group consisting of tetrafluoroolefin, chlorotrifluoroolefin, trifluoroethylene, vinyl fluoride, hexafluoropropylene, pentafluoropropylene, perfluoro(methyl vinyl ether), perfluoro (ethyl vinyl ether) or perfluoro(propyl vinyl ether).
Claim 5
Dependent Claim
17 words
The process according to claim 3, wherein the other fluoroolefin is hexafluoropropylene or its mixture with tetrafluoroethylene.
Claim 6
Dependent Claim
23 words
The process according to any one of claims 1 to 3, wherein the M/I proportion is in a range between 10 and 300.
Claim 7
Dependent Claim
20 words
The process according to any one of claims 1 to 3, wherein x is an integer of 1 or 2.
Claim 8
Dependent Claim
23 words
The process according to claim 6, wherein the polymer contains units of vinylidene fluoride in an amount of 10 to 90 mole %.
Claim 9
Dependent Claim
30 words
The process according to claim 7, wherein the polymer contains iodine in the molecule in an amount of 2 to 20% by weight based on the weight of the polymer.
Claim 10
Dependent Claim
22 words
The process according to claim 8, wherein the polymer is in a liquid state at a temperature of 0° to 150° C.
Claim 11
Dependent Claim
30 words
The process according to claim 1, wherein the polymer has the proportion of the weight average molecular weight (Mw) to the number average molecular weight (Mn) of 1.05 to 1.30.
Claim 12
Dependent Claim
14 words
A readily crosslinkable liquid, fluorine-containing polymer produced according to the process of claim 1.
Claim 13
Dependent Claim
17 words
A readily crosslinkable composition, which comprises the polymer of claim 11 and at least one crosslinking agent.
Claim 14
Dependent Claim
35 words
The composition according to claim 12, wherein the crosslinking agent is an organic peroxide, a polyamine or its salt, a polyhydroxy compound or its alkali metal salt, or a polythiol or its alkali metal salt.
Claim 15
Dependent Claim
40 words
A process for producing an elastomer which comprises producing a readily crosslinkable liquid, fluorine-containing polymer according to the process of claim 1, adding a crosslinking agent to the liquid fluorine-containing polymer produced and crosslinking said polymer to produce said elastomer.
Claim 16
Dependent Claim
10 words
The elastomer prepared according to the process of claim 14.
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) | 1985-11-29 | 1986-05-31 | 1986-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-29 | 1990-05-31 | 1990-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-29 | 1994-05-31 | 1994-11-30 | $7700.00 | Window Closed / Lapsed |