US4774302A
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: 1988-09-27
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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 a bromine or iodine-containing aromatic or perfluoroaromatic compound, polysubstituted with (1) bromine atoms or bromoalkyl groups (2) iodine atoms or iodoalkyl groups.
Inventors
- 👤 Haruyoshi Tatsu
- 👤 Jun Okabe
- 👤 Akihiro Naraki
- 👤 Masatoshi Abe
- 👤 Yoshiaki Ebina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:03
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/18
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
55 words
A process for producing a peroxide-vulcanizable fluorine-containing elastomer, which comprises homopolymerizing or copolymerizing fluorine-containing olefins having 2 to 8 carbon atoms in the presence of a radical polymerization initiator a bromine or iodine-containing unsaturated cyclic or perfluoro unsaturated cyclic compound polysubstituted with (1) bromine atoms or bromoalkyl groups or (2) iodine atoms or iodoalkyl groups.
Claim 2
Dependent Claim
55 words
A process for producing a peroxide-vulcanizable fluorine-containing elastomer, which comprises homopolymerizing or copolymerizing fluorine-containing olefins having 2 to 8 carbon atoms in the presence of a radical polymerization initiator a bromine or iodine-containing unsaturated cyclic or perfluoro unsaturated cyclic compound polysubstituted with (1) bromine atoms or bromoalkyl groups or (2) iodine atoms or iodoalkyl groups.
Claim 3
Dependent Claim
13 words
A process according to claim 1, wherein the bromine-containing aromatic compound is dibromobenzene.
Claim 4
Dependent Claim
13 words
A process according to claim 1, wherein the bromine-containing aromatic compound is bis(bromoalkyl)benzene.
Claim 5
Dependent Claim
13 words
A process according to claim 3, wherein the bromine-containing aromatic compound is bis(2-bromoethyl)benzene.
Claim 6
Dependent Claim
13 words
A process according to claim 1, wherein the iodine-containing aromatic compound is diiodobenzene.
Claim 7
Dependent Claim
13 words
A process according to claim 1, wherein the iodine-containing aromatic compound is bis(iodoalkyl)benzene.
Claim 8
Dependent Claim
13 words
A process according to claim 6, wherein the iodine-containing aromatic compound is bis(2-iodoethyl)benzene.
Claim 9
Dependent Claim
13 words
A process according to claim 1, wherein the bromine-containing perfluoroaromatic compound is dibromoperfluorobenzene.
Claim 10
Dependent Claim
13 words
A process according to claim 1, wherein the bromine-containing perfluoroaromatic compound is [perfluoro-bis(bromoalkyl)benzen].
Claim 11
Dependent Claim
13 words
A process according to claim 9, wherein the bromine-containing perfluoroaromatic compound is [perfluoro-bis(2-bromoethyl)perfluorobenzene].
Claim 12
Dependent Claim
13 words
A process according to claim 1, wherein the iodine-containing perfluoroaromatic compound is diiodoperfluorobenzene.
Claim 13
Dependent Claim
13 words
A process according to claim 1, wherein the iodine-containing perfluoroaromatic compound is [perfluoro-bis(iodoalkyl)-benzene].
Claim 14
Dependent Claim
13 words
A process according to claim 12, wherein the iodine-containing perfluoroaromatic compound is [perfluoro-bis(2-iodoethyl)-benzene].
Claim 15
Dependent Claim
38 words
A process according to claim 1, wherein the bromine or iodine-containing aromatic or perfluoroaromatic compound is used in an amount of 0.001 to 5% by weight in terms of bromine or iodine as contained in the fluorine-containing elastometer.
Claim 16
Dependent Claim
36 words
A process according to claim 1, wherein the fluorine-containing olefins can be copolymerized with at least one member of olefinic compounds of 2 to 6 carbon atoms and fluorine-containing dienes having 4 to 8 carbon atoms.
Claim 17
Dependent Claim
27 words
A process according to claim 15, wherein the olefinic compounds are used in an amount of 0.1 to 50% by mole as copolymerized in the fluorine-containing elastomer.
Claim 18
Dependent Claim
28 words
A process according to claim 15, wherein the fluorine-containing diene is used in an amount of not more than 1% by mole as copolymerized in the fluorine-containing elastomer.
Claim 19
Dependent Claim
41 words
A process for producing a peroxide-vulcanizable fluorine-containing elastomer, which comprises homopolymerizing or copolymerizing fluorine-containing olefins having 2 to 8 carbon atoms in the presence of a radical polymerization initiator a compound selected from the group consisting of bis(bromoalkyl)benzene, bis(iodalkyl) benzene, perfluoro[bis(bromoalkyl)benzene],perfluoro[bis(iodoalkyl)benzene].
Claim 20
Dependent Claim
41 words
A process for producing a peroxide-vulcanizable fluorine-containing elastomer, which comprises homopolymerizing or copolymerizing fluorine-containing olefins having 2 to 8 carbon atoms in the presence of a radical polymerization initiator a compound selected from the group consisting of bis(bromoalkyl)benzene, bis(iodalkyl) benzene, perfluoro[bis(bromoalkyl)benzene],perfluoro[bis(iodoalkyl)benzene].
Claim 21
Dependent Claim
45 words
A process for producing a peroxide-vulcanizable fluorine-containing elastomer, which comprises homopolymerizing or copolymerizing fluorine-containing olefins having 2 to 8 carbon atoms in the presence of a radical polymerization initiator a compound selected from the group consisting of a dibromobenzene, bis(2-bromoethyl)benzene, diiodobenzene, dibromoperfluorobenzene, perfluoro[bis-(2-bromoethyl)benzene, diiodoperfluorobenzene, perfluoro[bis(2-iodoethyl)benzene].
Claim 22
Dependent Claim
45 words
A process for producing a peroxide-vulcanizable fluorine-containing elastomer, which comprises homopolymerizing or copolymerizing fluorine-containing olefins having 2 to 8 carbon atoms in the presence of a radical polymerization initiator a compound selected from the group consisting of a dibromobenzene, bis(2-bromoethyl)benzene, diiodobenzene, dibromoperfluorobenzene, perfluoro[bis-(2-bromoethyl)benzene, diiodoperfluorobenzene, perfluoro[bis(2-iodoethyl)benzene].
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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) | 1991-09-27 | 1992-03-28 | 1992-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-27 | 1996-03-28 | 1996-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-27 | 2000-03-28 | 2000-09-27 | $7700.00 | Window Closed / Lapsed |