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US 4,214,060 AGranted
Fluoropolymer composition
AssigneeE. I. Du Pont de Nemours and Company
InventorsDavid Apotheker, Paul J. Krusic
Life of this patent
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Abstract
A fluoropolymer composition useful in the manufacture of cured fluoropolymer articles can be made by mixing a specified copolymer with an organic peroxide such as a dialkyl peroxide, and preferably also adding a divalent metal oxide and/or hydroxide and a suitable coagent such as triallyl isocyanurate. This composition contains a copolymer obtained by copolymerizing a small amount (e.g. about 0.5-3 mole %) of a bromine-containing olefin with certain fluorine-containing compounds.
Claims26
A fluoropolymer composition which comprises
- (A) a copolymer whose interpolymerized units consist essentially of
- (1) up to 3 mole % of units derived from a bromine-containing olefin with the proviso that enough of such units are present to provide at least 0.05 weight % bromine in the copolymer, and
- (2) enough units derived from component (2.1) or (2.2) as follows to make up the remainder of the copolymer:
- (2.1) at least one fluorine-containing monomer which is copolymerizable with component (1), contains 2-7 carbon atoms, contains no bromine atom, and contains at least as many fluorine atoms as carbon atoms, or
- (2.2) about 50-99 mole % of tetrafluoroethylene, about 1-50 mole % of a C.sub.2 -C.sub.4 olefinic hydrocarbon and from 0 to about 30 mole % of vinylidene fluoride, and
- (B) about 0.5-10% of an organic peroxide based on the weight of component (A).
3 more elements
Dependencies are inferred from the claim text.