| http://www.w3.org/ns/prov#value | - In order to adjust a ratio between the components B and C, it is also preferred to incorporate a crosslinking agent, such as divinylbenzene, in the polymerizable monomer composition in a proportion of 0.01-2.5 wt. parts, more preferably 0.05-1.0 wt. part, per 100 wt. parts of the vinyl monomer.
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