EP0153848A2
Expired / Lapsed
EP
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Fluorocarbon elastomer
Assignee: Dyneon LLC
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Filing: 1985-02-21
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Granted: —
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Expires: 2005-02-21
Abstract
Abstract Peroxide-curable fluorocarbon elastomers having interpolymerized units derived from a cure site monomer containing bromine or iodine. The fluorocarbon elastomer gums are prepared by copolymerizing with the principal monomers normally used in preparing fluorocarbon elastomers, e.g. vinylidene fluoride, hexafluoropropene, and (optionally) tetrafluoroethylene, a small amount of a novel cure site monomer which is a vinyl ether in which at least one of the two vinylic (or double-bonded) carbon atoms thereof is bonded to at least one bromine or iodine atom, e.g. CF a CH 2 0CF=CFBr. The cured fluorocarbon elastomers of this invention have useful properties normally associated with fluorocarbon elastomers, such as acid resistance, thermal stability, and high tensile strength. These properties of shaped articles made from these fluorocarbon elastomers are not adversely affected upon exposure to high temperatures for extended periods.
Inventors
- 👤 Loren D. C/O Minnesota Mining And Albin
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 22:52
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/28; C08F214/282; C08F214/186; C08F214/188; C08F214/22; C08F214/222
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
135 words
Fluorocarbon elastomer gum which comprises a copolymer whose interpolymerized units are derived from principal comonomer and from a vinyl ether cure site monomer of the formula ROCX=CYZ where one or two of X, Y, and Z substituents are selected from bromine and iodine atoms and the remainder of the substituents are independently selected from hydrogen, fluorine, or chlorine atoms, and where R is a straight or branched chain or cyclic alkyl or alkenyl radical, aryl radical, or combinations of such radicals, the hydrogen atoms of R may be substituted with chlorine or fluorine and R may contain catenary nitrogen or oxygen atoms, said principal comonomers being (a) vinylidene fluoride, at least one fluorine- containing olefin, and optionally perfluoroalkyl perfluorovinyl ether, (b) tetrafluoroethylene, olefinic hydrocarbon, and optionally vinylidene fluoride, or (c) tetrafluoroethylene and perfluoroalkyl perfluorovinyl ether.
Claim 2
Dependent Claim
135 words
Fluorocarbon elastomer gum which comprises a copolymer whose interpolymerized units are derived from principal comonomer and from a vinyl ether cure site monomer of the formula ROCX=CYZ where one or two of X, Y, and Z substituents are selected from bromine and iodine atoms and the remainder of the substituents are independently selected from hydrogen, fluorine, or chlorine atoms, and where R is a straight or branched chain or cyclic alkyl or alkenyl radical, aryl radical, or combinations of such radicals, the hydrogen atoms of R may be substituted with chlorine or fluorine and R may contain catenary nitrogen or oxygen atoms, said principal comonomers being (a) vinylidene fluoride, at least one fluorine- containing olefin, and optionally perfluoroalkyl perfluorovinyl ether, (b) tetrafluoroethylene, olefinic hydrocarbon, and optionally vinylidene fluoride, or (c) tetrafluoroethylene and perfluoroalkyl perfluorovinyl ether.
Claim 3
Dependent Claim
58 words
Fluorocarbon elastomer gum according to claim 1 where said vinyl ether cure site monomer has the formula ROCX=CYZ where Y and Z substituents are either bromine or iodine atoms and the remainder of the substituents and X are hydrogen or fluorine atoms, and R is an aliphatic group bonded to the ether oxygen atom through a methylene group.
Claim 4
Dependent Claim
34 words
Fluorocarbon elastomer gum according to claim 1 where said vinyl ether comonomer has the formula R'-O-CF=CFBr where R' is a lower alkyl or alkenyl group which can be fluorinated or is an aryl radical.
Claim 5
Dependent Claim
18 words
Fluorocarbon elastomer gum according to claim 3 wherein said cure site monomer is CF 3 CH 2 -0-CF=CFBr.
Claim 6
Dependent Claim
16 words
Fluorocarbon elastomer gum according to claim 3 wherein said cure site monomer is CF 2 =CH-O-CF=CFBr.
Claim 7
Dependent Claim
16 words
Fluorocarbon elastomer gum according to claim 3 wherein said cure site monomer is CH 3 -0-CF=CFBr.
Claim 8
Dependent Claim
18 words
Fluorocarbon elastomer gum according to claim 3 wherein said principal comonomers are vinylidene fluoride, hexafluoropropene, and optionally, tetrafluoroethylene.
Claim 9
Dependent Claim
38 words
Fluorocarbon elastomer gum according to claim 3 wherein said interpolymerized units are derived from 0.15 to 1.5 mole percent of said cure site monomer based on the total moles of said cure site monomer and said principal comonomers.
Claim 10
Dependent Claim
17 words
A composition comprising organic peroxide curing agent in admixture with the fluorocarbon elastomer gum of claim 1.
Claim 11
Dependent Claim
47 words
Process for preparing the fluorocarbon gum of claim 1 which comprises subjecting said cure site monomers and principal monomers to free radical aqueous emulsion polymerization at elevated temperature and pressure and with agitation, coagulating the resulting latex, and filtering, washing, and drying the resulting fluorocarbon elastomer gum.
References Cited (Backward Citations)
No citation records indexed.
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