| http://www.w3.org/ns/prov#value | - In one embodiment, the polysiloxane or polysiloxanes have the formula ##STR1## wherein each R and R4 is independently selected from alkyl radicals, aryl radicals, cycloalkyl radicals, aralkyl radicals and substituted counterparts thereof; each R3 is independently selected from monovalent hydrocarbon radicals having a multiple bond and substituted counterparts thereof; n is an integer in the range
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