| http://www.w3.org/ns/prov#value | - at least about 50% by weight of an organopolysiloxane having the general formula ##STR1## wherein each R is H or a substituted or unsubstituted monovalent hydrocarbon group free of aliphatic unsaturation, except that no more than two of the R groups may be --CH???CH2 and n is a positive integer; and
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