| http://www.w3.org/ns/prov#value | - A typical example of the cross-linkable silicon group is the group represented by the formula (1): ##STR10## wherein R1 and R2 are the same or different and each is a member selected from the group consisting of an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, an aralkyl group having 7 to 20 carbon atoms and a triorganosiloxy group having the formula (7):
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