US4748223A
Expired / Lapsed
US
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Process for producing peroxide-vulcanizable, fluorine-containing elastomer
Assignee: Nippon Mektron KK
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Filing: 1987-03-12
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Granted: 1988-05-31
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Expires: 2007-03-12
Abstract
Abstract A peroxide-vulcanizable, fluorine-containing elastomer having distinguished processability, vulcanization characteristics and physical properties of vulcanized products can be obtained by polymerization of fluorine-containing olefins having 2 to 8 carbon atoms in the presence of an iodine and bromine-containing compound represented by the general formula RBr n Im, where R represents a fluorohydrocarbon group, a chlorofluorohydrocarbon group, a chlorohydrocarbon group or a hydrocarbon group, and n and m are integers of 1 and 2.
Inventors
- 👤 Tatsu Haruyoshi
- 👤 Okabe Jun
- 👤 Naraki Akihiro
- 👤 Abe Masatoshi
- 👤 Ebina Yoshiaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:20
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/18
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
69 words
A process for producing a peroxide-vulcanizable, fluorine-containing elastomer, which comprises homopolymerizing or copolymerizing a fluorine-containing olefin having 2 to 8 carbon atoms in the presence of a radical polymerization iniator and an iodine and bromine-containing compound represented by the general formula: RBr.sub.n I.sub.m where R is a fluorohydrocarbon group, a chlorofluoro-hydrocarbon group, a chlorohydrocarbon group or a hydrocarbon group, and n and m are integers of 1 and 2.
Claim 2
Dependent Claim
69 words
A process for producing a peroxide-vulcanizable, fluorine-containing elastomer, which comprises homopolymerizing or copolymerizing a fluorine-containing olefin having 2 to 8 carbon atoms in the presence of a radical polymerization iniator and an iodine and bromine-containing compound represented by the general formula: RBr.sub.n I.sub.m where R is a fluorohydrocarbon group, a chlorofluoro-hydrocarbon group, a chlorohydrocarbon group or a hydrocarbon group, and n and m are integers of 1 and 2.
Claim 3
Dependent Claim
16 words
A process according to claim 1, wherein the iodine and bromine-containing compound is a linear compound.
Claim 4
Dependent Claim
17 words
A process according to claim 2, wherein the linear iodine and bromine-containing compound is a saturated compound.
Claim 5
Dependent Claim
17 words
A process according to claim 2, wherein the linear iodine and bromine-containing compound is an unsaturated compound.
Claim 6
Dependent Claim
16 words
A process according to claim 1, wherein the iodine and bromine-containing compound is an aromatic compound.
Claim 7
Dependent Claim
17 words
A process according to claim 5, wherein the aromatic iodine and bromine-containing compound is an perfluoro[iodoalkylbromoalkyl benzene].
Claim 8
Dependent Claim
16 words
A process according to claim 5, wherein the aromatic iodine and bromine-containing compound is perfluoro[iodoethyl bromoethylbenzene].
Claim 9
Dependent Claim
32 words
A process according to claim 1, wherein 0.001 to 5% by weight of the iodine and bromine-containing compound in terms of iodine and bromine is contained in the fluorine-containing elastomer as bonded.
Claim 10
Dependent Claim
28 words
A process according to claim 1, wherein the polymerization reaction is carried out in the presence of a polymerization initiator at a temperature of -30° to 150° C.
Claim 11
Dependent Claim
31 words
A process according to claim 1, wherein the polymerization reaction is carried out in the presence of a polymerization initiator of redox system at a temperature of 0° to 50° C.
Claim 12
Dependent Claim
36 words
A process according to claim 1, wherein the fluorine-containing olefin is copolymerized with at least one of an olefinic compound having 2 to 6 carbon atoms and a fluorine-containing diene having 4 to 8 carbon atoms.
Claim 13
Dependent Claim
26 words
A process according to claim 11, wherein the olefinic compound is in an amount of 0.1 to 50% by mole as copolymerized in the fluorine-containing elastomer.
Claim 14
Dependent Claim
28 words
A process according to claim 11, wherein the fluorine-containing diene is used in an amount of not more than 1% by mole, as contained in the fluorine-containing elastomer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |