| http://www.w3.org/ns/prov#value | - A polymer composition according to claim 2 or 3, wherein the polymer (a) has repeating units of the formula: ##STR44## wherein R is a hydrogen atom or a lower alkyl group; R2 and R3 are independently a hydrogen atom, an alkyl group which may be substituted with one or more halogen atoms, or an allyl group, or R2 and R3 can form an alkylene ring together with the interposing carbon atom, provided t
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