Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2007-02-27
2009-08-18
Zimmer, Marc S. (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C524S544000, C524S545000, C524S546000, C524S547000, C524S551000, C524S570000, C524S800000, C526S247000, C526S249000, C526S250000, C526S253000, C526S255000, C526S291000, C526S292900, C526S294000, C526S296000, C526S332000, C526S348800, C526S348000
Reexamination Certificate
active
07576164
ABSTRACT:
Compositions of fluoroelastomers containing copolymerized units of tetrafluoroethylene, propylene, a first cure site 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, and a second cure site selected from the group consisting of i) copolymerized units of a brominated cure site monomer, ii) copolymerized units of an iodinated cure site monomer, iii) copolymerized units of a chlorinated cure site monomer, iv) brominated endgroups, v) iodinated endgroups and vi) a combination of any of i)-v) 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, and excellent adhesion to metal substrates. Optionally, the fluoroelastomers may be dual cured by both a polyhydroxy system and an organic peroxide system.
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Bauerle John G.
Bish Christopher J.
Dobel Theresa M.
Tang Phan L.
Buie Nicole M
Du Pont Performance Elastomers LLC.
Zimmer Marc S.
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