US3987126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluoroelastomer blend composition
Assignee: EIDP Inc
•
Filing: 1975-07-31
•
Granted: 1976-10-19
•
Expires: 1995-07-31
Abstract
Abstract A fluoroelastomer composition which is very useful for the manufacture of cured fluoroelastomer articles having desirable chemical and heat resistance combined with excellent low temperature flexibility can be prepared by blending specified amounts of the following: (A) an elastomeric copolymer of tetrafluoroethylene, a perfluoroalkyl perfluorovinyl ether and a bromine-containing olefin and (B) a certain fluoropolymer having perfluoroalkyl end groups containing an iodine atom; and when making the cured articles, it also preferred to add (C) an organic peroxide curing agent, (D) a co-curing agent such as triallyl isocyanurate and (E) a suitable metal compound such as a divalent metal oxide or hydroxide.
Inventors
- 👤 Nicolas Brodoway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:05
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/18; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/04; C08K5/14; C08K5/16; C08K5/34; C08L27/10
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
111 words
A fluoroelastomer composition which comprises A. an elastomeric copolymer of tetrafluoroethylene, a perfluoroalkyl perfluorovinyl ether wherein the alkyl group contains 1-5 carbon atoms, and a bromine-containing olefin in an amount such that said copolymer has a bromine content of about 0.3--3.0 % by weight, the tetrafluoroethylene/vinyl ether molar ratio being about 50/50 to 80/20, and B. a polymer of the structure ##EQU1## wherein R' f and R" f are perfluoroalkyl groups, at least one of which contains an iodine atom in place of a fluorine atom, and m and p are whole numbers, the sum of which is about 6-100, the component (A)/component (B) weight ratio being about 50/50 to 90/10.
Claim 2
Dependent Claim
111 words
A fluoroelastomer composition which comprises A. an elastomeric copolymer of tetrafluoroethylene, a perfluoroalkyl perfluorovinyl ether wherein the alkyl group contains 1-5 carbon atoms, and a bromine-containing olefin in an amount such that said copolymer has a bromine content of about 0.3--3.0 % by weight, the tetrafluoroethylene/vinyl ether molar ratio being about 50/50 to 80/20, and B. a polymer of the structure ##EQU1## wherein R' f and R" f are perfluoroalkyl groups, at least one of which contains an iodine atom in place of a fluorine atom, and m and p are whole numbers, the sum of which is about 6-100, the component (A)/component (B) weight ratio being about 50/50 to 90/10.
Claim 3
Dependent Claim
26 words
A composition according to claim 1 which also contains C. about 0.5-10% of an organic peroxide based on the combined weight of components (A) and (B).
Claim 4
Dependent Claim
42 words
A composition according to claim 2 which also contains D. about 0.5-10%, based on the combined weight of components (A) and (B), of a coagent composed of polyunsaturated compound which is capable of cooperating with said peroxide to provide a useful cure.
Claim 5
Dependent Claim
37 words
A composition according to claim 3 which also contains E. about 1-15%, based on the combined weight of components (A) and (B), of a metal compound selected from the group: divalent metal oxides and divalent metal hydroxides.
Claim 6
Dependent Claim
40 words
A composition according to claim 4 wherein the component (D) coagent is a compound selected from the group: triallyl cyanurate; triallyl isocyanurate; tris(diallylamine)-s-triazine; triallyl phosphite, N,N-diallyl acrylamide; hexa-allyl phosphoramide; N,N,N'N'-tetra-allyl terephthalamide, N,N,N',N'-tetra-allyl malonamide; trivinyl isocyanurate; 2,4,6-trivinyl methyltrisiloxane; and tri(5-norbornene-2-methylene) cyanurate.
Claim 7
Dependent Claim
17 words
A composition according to claim 1 wherein the vinyl ether of component (A) is perfluoromethyl perfluorovinyl ether.
Claim 8
Dependent Claim
15 words
A composition according to claim 5 wherein the component (C) peroxide is a dialkyl peroxide.
Claim 9
Dependent Claim
15 words
A composition according to claim 1 wherein the bromine-containing olefin of component (A) is bromotrifluoroethylene.
Claim 10
Dependent Claim
20 words
A composition according to claim 1 wherein the component (A) copolymer has a bromine content of about 0.5-1.5% by weight.
Claim 11
Dependent Claim
20 words
A composition according to claim 5 wherein component (C) is a peroxide which decomposes at a temperature above 49° C.
Claim 12
Dependent Claim
13 words
A composition according to claim 10 wherein component (C) is a di-tertiarybutyl peroxide.
Claim 13
Dependent Claim
12 words
A composition according to claim 11 wherein component (C) is 2,5-dimethyl-2,5-di(tertiarybutylperoxy) hexyne-3.
Claim 14
Dependent Claim
12 words
A composition according to claim 11 wherein component (C) is 2,5-dimethyl-2,5-di(tertiarybutylperoxy) hexane.
Claim 15
Dependent Claim
25 words
A composition according to claim 5 wherein the component (C) peroxide content is about 1.5-5% based on the combined weight of components (A) and (B).
Claim 16
Dependent Claim
25 words
A composition according to claim 5 wherein the component (D) coagent content is about 1-7% based on the combined weight of components (A) and (B).
Claim 17
Dependent Claim
26 words
A composition according to claim 5 wherein the component (E) metal compound content is about 2-10% based on the combined weight of components (A) and (B).
Claim 18
Dependent Claim
17 words
A composition according to claim 5 wherein the component (D) coagent is triallyl isocyanurate or triallyl cyanurate.
References Cited (Backward Citations)
US2965619A
Cited
US3306879A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-19 | 1980-04-19 | 1980-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-19 | 1984-04-19 | 1984-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-19 | 1988-04-19 | 1988-10-19 | $7700.00 | Window Closed / Lapsed |