| http://www.w3.org/ns/prov#value | - heating in ammonia to a temperature above 400??? C. for about two hours, the resin being a hydridosiloxane containing units of the formula Hsi(OH)x (OR)y Oz/2, wherein R is an alkyl group, an aryl group, or an alkenyl group, X is 0-2, y is 0-2, z is 1-3 and the sum of X+Y+Z is 3.
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