| http://www.w3.org/ns/prov#value | - (R???O)3SiO???(R2SiO)n???Si(OR???)3 (R???O)3Si???CH2CH2???(R2SiO)n???Si???CH2CH2???Si(OR???)3 wherein R is independently a substituted or unsubstituted monovalent hydrocarbon group, n is an integer of at least 10, and R??? is a monovalent hydrocarbon group containing up to 6 carbon atoms or an alkoxyalkyl group.
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