Multi-acid polymers from multifunctional amino phosphonic acids and sulfonyl halide precursors and methods of making the same
AssigneeNissan North America, Inc.
InventorRameshwar Yadav
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Abstract
Multi-acid polymers are produced having the formula R—SO2—NH—R′—(SO3H)n and made from a polymer precursor in sulfonyl fluoride form or sulfonyl chloride form The R is one or more units of the polymer precursor without sulfonyl fluoride or sulfonyl chloride, R′ is the portion of the amino sulfonic acid without the SO3H and NH, n is one or more, and the multi-acid polymer has two or more proton conducting groups. A method of making the multi-acid polymers includes reacting an amino acid having multiple sulfonic acids with a polymer precursor in sulfonyl fluoride form or sulfonyl chloride form in a mild base condition to produce the multi-acid polymer having two or more proton conducting groups.
Claims11
A multi-acid polymer having the formula R—SO2—NH—R′—(PO3H2)n, and made from an amino phosphonic acid having multiple phosphonic acid groups and a polymer precursor in sulfonyl fluoride form or sulfonyl chloride form, wherein R′ is the portion of the amino phosphonic acid without the PO3H2 and NH, n is two or more, the multi-acid polymer has two or more proton conducting groups, and R is:
- wherein Rf=—CF2—CF(CF3)—O—(CF2)2—, —(CF2)4—, or —(CF2)2—, m=3-13.5, x=1 or more.
A multi-acid polymer having the formula R—SO2—NH—R′—(PO3H2)n, and made from an amino phosphonic acid and a polymer precursor in sulfonyl fluoride form or sulfonyl chloride form, wherein R′ is the portion of the amino phosphonic acid without the PO3H2 and NH, n is one or more, and the multi-acid polymer has two or more proton conducting groups, R is:
- wherein Rf=—CF2—CF(CF3)—O—(CF2)2—, —(CF2)4—, or —(CF2)2—, m=3-13.5, x=1 or more.
Dependencies are inferred from the claim text.