Fluoropolymers with improved characteristics
Assignee3M Innovative Properties Company
InventorsDenis Duchesne, Harald Kaspar, Lisa P. Chen, Klaus Hintzer, Attila Molnar, Ludwig Mayer, Gernot Löhr
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Abstract
A fluoropolymer composition is provided. The polymer comprises interpolymerized units derived from (i) tetrafluoroethylene, (ii) vinylidene fluoride, (iii) at least one ethylenically unsaturated monomer of the formula CF2═CFRf where Rf is a perfluoroalkyl or a perfluoroalkoxy of 1 to 8 carbon atoms, and (iv) a perfluorovinyl ether of the formula CF2═CF—(OCF2CF(Rf))aORf where Rf is as described in (iii), Rf is a perfluoroaliphatic, preferably a perfluoroalkyl or a perfluoroalkoxy, of 1 to 8, preferably 1 to 3, carbon atoms, and a has a value of 0 to 3.
Claims22
A multilayer article comprising
- a first layer comprising a polymer containing interpolymerized units derived from at least 30 weight percent (wt %) tetrafluoroethylene, (ii) from about 5 to less than 30 wt % vinylidene fluoride, (iii) from 0.5 to 50 wt % of at least one ethylenically unsaturated monomer of the formula CF2═CFRf where Rf is a perfiucroalkyl of 1 to 8 carbon atoms, and (iv) a perfluorovinyl ether of the formula CF2═CF—(OCF2CF(Rf))aOR′f where Rf is as described in (iii), R′f is a perfluoroaliphatic of 1 to 8 carbon atoms and a has a value of 0 to 3, and
- a second layer.
A multilayer article comprising
- a first layer comprising a polymer containing interpolymerized units derived from (i) from about 40 to 85 weight percent (wt %) tetrafluoroethylene, (ii) from about 5 to less than 30 wt % vinylidene fluoride, (iii) from 0.5 to 50 wt % of at least one ethylenically unsaturated monomer of the formula CF2═CFRf where Rf is a perfluoroalkyl of 1 to 8 carbon atoms, and (iv) from 0.1 to 15 wt % of a perfluorovinyl ether of the formula CF2═CF—(OCF2CF(Rf)aOR′f where Rf is as described in (iii), R′f is a per fluoroaliphatic of 1 to 8 carbon atoms, and a has a value of 0 to 3, and
- a second layer.
A curable composition comprising
- an elastomeric fluoropolymer comprising interpolymerized units derived from (i) 20 to 50 weight percent (wt %) tetrafluoroethylene, (ii) from 10 to 35 wt % of vinylidene fluoride, (iii) from 20 to 50 wt % of a monomer having the formula CF2═CFRf wherein Rf is a C1-C8 perfluoroalkyl, and (iv) from 0.1 to 15 wt % of a perfluorovinyl ether of the formula CF2═CF—(OCF2CF(Rf))aOR′f wherein Rf is as described in (iii), R′f is a fluoroaliphatic of from 1 to 8 carbon atoms and has a value of from 1 to 8, and a has a value of from 1 to 3
- and a curative for the elastomeric fluoropolymer.
Dependencies are inferred from the claim text.