A polymer film comprising anionic groups and 0.008 to 25 mg/g of each of components (a) and (b): (a) a crosslinking agent which is free from fluoro groups and comprises a group of Formula (I); and (b) a non-ionic crosslinking agent; Formula (I) wherein M.sup.+ is a cation and * indicates the attachment points to other elements of the crosslinking agent.

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A polymer of formula (I), wherein the nitrogen atoms are coordinated with a lithium atom in 0% to 100% of repeat units in the polymer, and each R1 in each individual repeat unit independently represents a bivalent group, wherein the bivalent groups are, independently from one another, alkylene, arylene, or CH.sub.2CH.sub.2(OCH.sub.2CH.sub.2).sub.m, wherein m is an integer of 1 or more, and wherein the alkylene, the arylene, and the CH.sub.2CH.sub.2(OCH.sub.2CH.sub.2).sub.m are optionally substituted with one or more halogen atoms. The polymers of the invention can be used as battery electrolytes.

##STR00001##

A polymer of formula (I), wherein the nitrogen atoms are coordinated with a lithium atom in 0% to 100% of repeat units in the polymer, and each R1 in each individual repeat unit independently represents a bivalent group, wherein the bivalent groups are, independently from one another, alkylene, arylene, or CH.sub.2CH.sub.2(OCH.sub.2CH.sub.2).sub.m, wherein m is an integer of 1 or more, and wherein the alkylene, the arylene, and the CH.sub.2CH.sub.2(OCH.sub.2CH.sub.2).sub.m are optionally substituted with one or more halogen atoms. The polymers of the invention can be used as battery electrolytes.

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Multi-acid polymers are produced having the formula RSO.sub.2NH(SO.sub.3.sup.H.sup.+).sub.n or RSO.sub.2NH(PO.sub.3.sup.H.sup.2+).sub.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, 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 or phosphonic 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.

Multi-acid polymers are produced having the formula RSO.sub.2NH(SO.sub.3.sup.H.sup.+).sub.n or RSO.sub.2NH(PO.sub.3.sup.H.sup.2+).sub.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, 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 or phosphonic 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.

Multi-acid polymers are produced having the formula RSO.sub.2NHR(SO.sub.3H).sub.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 SO.sub.3H 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.

Multi-acid polymers are produced having the formula RSO.sub.2NHR(SO.sub.3H).sub.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 SO.sub.3H 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.

Multi-acid polymers are produced having the formula RSO.sub.2NHR(SO.sub.3H).sub.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 SO.sub.3H 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.

Multi-acid polymers are produced having the formula RSO.sub.2NHR(SO.sub.3H).sub.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 SO.sub.3H 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.

Disclosed are a polysulfone amide compound having a repeating unit represented by formula (1) (in formula (1), R.sup.1-R.sup.8 each independently represent a hydrogen atom or a monovalent organic group, X represents a divalent linking group which is not conjugated with a benzene ring to be linked thereto, and Y represents a divalent aromatic residue), and a resin composition comprising the polysulfone amide compound.

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