Patent US5969066A successfully refreshed from Google Patents.
US5969066A
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US
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Fluoroelastomer and its cross-linkable composition
Assignee: Nippon Mektron KK
•
Filing: 1997-08-18
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Granted: 1999-10-19
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Expires: 2017-08-18
Abstract
Abstract A fluoroelastomer comprising 2 to 8% by mole of tetrafluoroethylene, 14 to 25% by mole of perfluoro(alkyl vinyl ether) and 70 to 85% by mole of vinylidene fluoride, sum total being 100% by mole, obtained by copolymerization in the presence of a bromine-containing monomer compound and an iodine and bromine-containing compound, has distinguished low temperature characteristics, solvent resistance and chemical resistance by itself.
Inventors
- 👤 Takashi Enokida
- 👤 Hajime Akimoto
- 👤 Haruyoshi Tatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:10
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/22; C08F214/222
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
45 words
A fluoroelastomer which comprises 2 to 8% by mole of tetrafluorethylene, 14 to 25% by mole of perfluoro(alkyl vinyl ether) having an alkyl group having 1 to 3 carbon atoms and 70 to 85% by mole of vinylidene fluoride, sum total being 100% by mole.
Claim 2
Dependent Claim
45 words
A fluoroelastomer which comprises 2 to 8% by mole of tetrafluorethylene, 14 to 25% by mole of perfluoro(alkyl vinyl ether) having an alkyl group having 1 to 3 carbon atoms and 70 to 85% by mole of vinylidene fluoride, sum total being 100% by mole.
Claim 3
Dependent Claim
27 words
A fluoroelastomer according to claim 1, wherein the fluoroelastomer is obtained by copolymerization in the presence of a bromine-containing monomer compound and an iodine and bromine-containing compound.
Claim 4
Dependent Claim
16 words
A fluoroelastomer according to claim 2, wherein the bromine-containing monomer compound is a brominated vinyl compound.
Claim 5
Dependent Claim
30 words
A fluoroelastomer according to claim 3, wherein the brominated vinyl compound is a bromine-containing vinyl ether represented by the following general formula: BrRf--O--CF═CF.sub.2 where BrRf is a bromine-containing perfluoroalkyl group.
Claim 6
Dependent Claim
15 words
A fluoroelastomer according to claim 2, wherein the bromine-containing monomer compound is a brominated olefin.
Claim 7
Dependent Claim
35 words
A fluoroelastomer accoding to claim 2, wherein about 0.001 to about 5% by weight of the bromine-containing monomer compound is used on the basis of sum total of tetrafluoroethylene, perfluoro(alkyl vinyl ether) and vinylidene fluoride.
Claim 8
Dependent Claim
35 words
A fluoroelastomer according to claim 2, wherein about 0.01 to about 3% by weight of the bromine-containing monomer compound is used on the basis of sum total of tetrafluoroethylene, perfluoro(alkyl vinyl ether) and vinylidene fluoride.
Claim 9
Dependent Claim
47 words
A fluoroelastomer according to claim 2, wherein the iodine and bromine-containing compound is a compound represented by the general following formula: RBrnIm where R is a fluorohydrocarbon group, a chlorofluorohydrocarbon group, a chlorohydrocarbon group or a hydrocarbon group, and n and m each are 1 or 2.
Claim 10
Dependent Claim
36 words
A fluoroelastomer according to claim 2, wherein the iodine and bromine-containing compound is bonded to the resulting fluoroelastomer in an amount of about 0.001 to about 5% by weight in terms of iodine and bromine, respectively.
Claim 11
Dependent Claim
36 words
A fluoroelastomer accoding to claim 2, wherein the iodine and bromine-containing compound is bonded to the resulting fluoroelastomer in an amount of about 0.01 to about 3% by weight in terms of iodine and bromine, respectively.
Claim 12
Dependent Claim
54 words
A cross-linkable composition, which comprises a fluoroelastomer comprising 2 to 8% by mole of tetrafluoroethylene, 14 to 25% by mole of perfluoro(alkyl vinyl ether) having an alkyl group having 1 to 3 carbon atoms and 70 to 85% by mole of vinylidene fluoride, sum total being 100% by mole, and a peroxide cross-linking agent.
Claim 13
Dependent Claim
54 words
A cross-linkable composition, which comprises a fluoroelastomer comprising 2 to 8% by mole of tetrafluoroethylene, 14 to 25% by mole of perfluoro(alkyl vinyl ether) having an alkyl group having 1 to 3 carbon atoms and 70 to 85% by mole of vinylidene fluoride, sum total being 100% by mole, and a peroxide cross-linking agent.
Claim 14
Dependent Claim
19 words
A cross-linkable composition according to claim 11, wherein a cocross-linking agent comprising a polyfunctional unsaturated compound is further contained.
Claim 15
Dependent Claim
71 words
A cross-linkable composition, which comprises a fluoroelastomer comprising 2 to 8% by mole of tetrafluoroethylene, 14 to 25% by mole of perfluoro(alkyl vinyl ether) having an alkyl group having 1 to 3 carbon atoms and 70 to 85% by mole of vinylidene fluoride, sum total being 100% by mole, obtained by copolymerization in the presence of a bromine-containing monomer compound and an iodine and bromine-containing compound, and a peroxide cross-linking agent.
Claim 16
Dependent Claim
71 words
A cross-linkable composition, which comprises a fluoroelastomer comprising 2 to 8% by mole of tetrafluoroethylene, 14 to 25% by mole of perfluoro(alkyl vinyl ether) having an alkyl group having 1 to 3 carbon atoms and 70 to 85% by mole of vinylidene fluoride, sum total being 100% by mole, obtained by copolymerization in the presence of a bromine-containing monomer compound and an iodine and bromine-containing compound, and a peroxide cross-linking agent.
Claim 17
Dependent Claim
19 words
A cross-linkable composition according to claim 13, wherein a cocross-linking agent comprising a polyfunctional unsaturated compound is further contained.
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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) | 2002-10-18 | 2003-04-19 | 2003-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-10-18 | 2007-04-19 | 2007-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-10-18 | 2011-04-19 | 2011-10-19 | $7700.00 | Window Closed / Lapsed |