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US4530971A
Expired / Lapsed
US
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Covulcanizable compositions from fluoroelastomers based on vinylidene fluoride and copolymers tetrafluoroethylene-propylene
Assignee: Montedison SpA
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Filing: 1984-09-06
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Granted: 1985-07-23
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Expires: 2004-09-06
Abstract
Abstract A fluoroelastomer (A) based on vinylidene fluoride (40-83% by moles), perfluoropropene (15-35%) and tetrafluoroethylene (0%-30%) and a diamino compound (B), are mixed with a copolymer (C) containing tetrafluoroethylene (40%-60% by moles) and propylene (60-40%). The thus obtained mixture is covulcanizable with systems based on organic peroxides. In particular mixtures are employed, containing: (A)=42-70% by weight, (B)=1-4%, (C)=51-22%, peroxide 0.4-5%, triallylisocianurate 2-4%.
Inventors
- 👤 Sergio Geri
- 👤 Giovanni Moggi
- 👤 Carlo Lagana
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:59
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/16; C08L27/18; C08L23/00; C08L23/02; C08L23/10; C08L23/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
Composition of elastomers suitable to be vulcanized, comprising: (a) a fluoroelastomer based on vinylidene fluoride (40-83% by moles), perfluoropropene (15%-35%) and tetrafluoroethylene (0%-30%), in an amount equal to 42%-70% by weight of the total elastomeric composition; (b) an amino compound suitable for vulcanizing fluoroelastomers selected from the group comprising the Schiff bases or the diamine carbamates, in an amount equal to 1-4% by weight of the total composition; (c) a copolymer of tetrafluoroethylene (40%-60% by moles) and of propylene (60%-40%) in an amount equal to 51-22% by weight of the whole; (d) an organic peroxide as vulcanizing agent, in an amount equal to 0.4-5% by weight of the whole.
Claim 2
Dependent Claim
109 words
Composition of elastomers suitable to be vulcanized, comprising: (a) a fluoroelastomer based on vinylidene fluoride (40-83% by moles), perfluoropropene (15%-35%) and tetrafluoroethylene (0%-30%), in an amount equal to 42%-70% by weight of the total elastomeric composition; (b) an amino compound suitable for vulcanizing fluoroelastomers selected from the group comprising the Schiff bases or the diamine carbamates, in an amount equal to 1-4% by weight of the total composition; (c) a copolymer of tetrafluoroethylene (40%-60% by moles) and of propylene (60%-40%) in an amount equal to 51-22% by weight of the whole; (d) an organic peroxide as vulcanizing agent, in an amount equal to 0.4-5% by weight of the whole.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-22 | 1989-01-21 | 1989-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-22 | 1993-01-21 | 1993-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-22 | 1997-01-21 | 1997-07-23 | $7700.00 | Window Closed / Lapsed |