| http://www.w3.org/ns/prov#value | - 9. A process as defined in claim 1, wherein the hydrogel polymer comprises: ##STR00007## wherein n is an integer of 2 to 3; R', R''and R''' are independently selected from the group consisting of H,C.sub.1 to C.sub.16 alkyl, aryl, arylamine,
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