| http://www.w3.org/ns/prov#value | - A fine particulate cross-linked N-vinylamide resin having an average particle size of not more than 10 ??m comprising cross-linked copolymer of a compound having the formula (I) and a compound having the formula (II): ##STR3## wherein, R1 to R5 may be the same or different and represent a hydrogen atom, methyl group, or ethyl group, X represents a C2 or C3 alkylene group, and n is an integer of 2
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