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US 2008/0292935 A1Published application
Methods to Prepare Chemically Stabilized Ionomers Containing Inorganic Fillers
OwnerMark Gerrit Roelofsinventor
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Abstract
Ionomeric polymers that are chemically stabilized and contain inorganic fillers are prepared and show reduced degradation. The ionomeric polymers are useful in electrochemical and fuel cells.
Claims19
A method, comprising the steps of:
- a) providing a fluorinated ionomer;
- b) chemically stabilizing the ionomer to form a chemically stabilized ionomer, wherein the ionomer has been fluorinated by subjecting it to a fluorinating agent until it contains less than 200 unstable groups per 1,000,000 carbon atoms;
- c) providing an inorganic filler;
- wherein the inorganic filler is a metal oxide, metal hydroxide, metal phosphate, or mixture thereof, and
- d) incorporating the inorganic filler into the chemically stabilized ionomer.
2 more elements
A membrane comprising a porous support having interconnecting pores, a chemically stabilized fluorinated ionomer, and an inorganic filler, wherein the ionomer is prepared by a method comprising the steps of:
- a) providing a fluorinated ionomer;
- b) chemically stabilizing the ionomer to form a chemically stabilized ionomer, wherein the ionomer has been fluorinated by subjecting it to a fluorinating agent until it contains less than 200 unstable groups per 1,000,000 carbon atoms;
- c) providing an inorganic filler, wherein the inorganic filler is a metal oxide, metal hydroxide, metal phosphate, or mixture thereof;
- and
- d) incorporating the inorganic filler into the chemically stabilized ionomer.
2 more elements
Dependencies are inferred from the claim text.