| http://www.w3.org/ns/prov#value | - (R)b (H)c SiO4-b-c/2 sufficient to provide from about 0.5 to about 1.0 silicon-bonded hydrogen atoms per silicon-bonded vinyl group, R is a monovalent hydrocarbon radical free to aliphatic unsaturation, d has a value of from about 0.1 to about 1.0, and the sum of d and e is from about 2.0 to about 2.7, there being at least two silicon-bonded hydrogen atoms per molecule.
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