| http://www.w3.org/ns/prov#value | - The compound containing at least two or a plurality of vinyl groups include, among others, divinylbenzene, di- or triacrylate or di- or trimethacrylate of a polyhydric alcohol having 2 to 3 hydroxyl groups and having 2 to 46 carbon atoms, such as ethylene glycol, polyethylene glycols (polymerization degree: 2-23), or the like.
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