| http://www.w3.org/ns/prov#value | - (A-a) an organopolysiloxane or organosilane represented by the formula ##STR1## in which R1 is a monovalent organic group having aliphatic unsaturation, R2 is a substituted or unsubstituted monovalent hydrocarbon group having no aliphatic unsaturation, a is a number from 0.0004 to 4.0 inclusive and b is zero or a positive number not exceeding 2.5 with the proviso that a+b is in the range from 1.1
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