Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2005-08-02
2005-08-02
Lipman, Bernard (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
active
06924344
ABSTRACT:
Compositions of specialty fluoroelastomers containing copolymerized units of tetrafluoroethylene, propylene, optionally vinylidene fluoride, and a cure site monomer selected from the group consisting of i) trifluoroethylene, ii) 3,3,3-trifluoropropene-1, iii) 1,2,3,3,3-pentafluoropropylene, iv) 1,1,3,3,3-pentafluoropropylene, and v) 2,3,3,3-tetrafluoropropene are readily curable with polyhydroxy curing systems. The resulting cured articles have a combination of excellent resistance to alkaline fluids, superior tensile properties and compression set resistance.
REFERENCES:
patent: 4529784 (1985-07-01), Finlay
patent: 4882390 (1989-11-01), Kolb
patent: 4910260 (1990-03-01), Wachi et al.
patent: 4912171 (1990-03-01), Grootaert et al.
patent: 6329469 (2001-12-01), Bowers et al.
patent: 5224956 (1977-07-01), None
Bauerle John Gordon
Schmiegel Walter Werner
DuPont Dow Elastomers LLC
Lipman Bernard
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