| http://www.w3.org/ns/prov#value | - SiO[R2 SiO]x [Rw (Cn H2+1)2-w SiO]y SiR3wherein R is monovalent hydrocarbon of 1 to 12 carbon atoms, preferably methyl, n is an integer of at least 12 and preferably not more than 24, w is an integer of 0 or 1, preferably 1, x is an integer of at least 1, preferably 10 or more, and y is an integer of 1 or more, preferably at least 10.
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