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US 2004/0016693 A1Published application
Process for preparing graft copolymer membranes
AssigneeBallard Power Systems Inc.
InventorCharles Stone
Life of this patent
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Abstract
A process for preparing a graft copolymer membrane is provided comprising exposing a polymeric base film to a dose of ionizing radiation, and then contacting the irradiated base film with an emulsion comprising a fluorostyrenic monomer.
Claims49
A process for preparing a graft copolymer membrane, the process comprising:
- exposing a polymeric base film to a dose of ionizing radiation;
- and
- contacting the irradiated base film with an emulsion comprising at least one fluorostyrenic monomer,
- wherein the amount of monomer in the emulsion is less than or equal to 30% by volume.
1 more element
A process for preparing a graft copolymer membrane, the process comprising:
- exposing a polymeric base film to a dose of ionizing radiation;
- and
- contacting the irradiated base film with an emulsion comprising at least one substituted α,β,β-trifluorostyrene monomer.
A process for preparing a graft copolymer membrane, the process comprising:
- exposing a polymeric base film to a dose of ionizing radiation;
- and
- contacting the polymeric base film with an emulsion comprising trifluoronaphthyl monomers.
Dependencies are inferred from the claim text.