| http://www.w3.org/ns/prov#value | - The poylether which is reacted with the silane compound (a) contains a group having ethylenic double bond represented by formula (b): wherein R13 is preferably hydrogen atom or a hydrocarbon group, and most preferably hydrogen atom; and Z is a divalent group containing a divalent hydrocarbon group, ether bond, ester bond, urethane bond, carbonate bond, or carbonyl bond, which is typically selected
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