| http://www.w3.org/ns/prov#value | - r more silanes of formula (H)R1 b(R2O)3-bSi(R3)cSi(OR4)3-dR5 d in the presence of a basic catalyst; and b) reacting the mixture in the presence of an acidic catalyst; wherein R is hydrogen, (C1-C8)alkyl, (C7-C12)arylalkyl, substituted (C7-C12)arylalkyl, aryl, and substituted aryl; Y is any hydrolyzable group; a is an integer of 1 to 2; R1, R2, R4 and R are independently selected from hydrogen, (C1
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