| http://www.w3.org/ns/prov#value | - g hydrolyzable groups selected from the group represented by the formula: ##STR2## wherein X, Y, Z and W represent --R, --OR, --Cl, --Br, --SiH3, --COOR, --SiHn Clm, in which R is a member of the group consisting of hydrogen, alkyl, cycloalkyl, aromatic, alkylaromatic, and cycloalkyl having from 1 to 30 C atoms, and n and m represent numbers from 1 to 3, through a thermal treatment wherein said al
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