| http://www.w3.org/ns/prov#value | - Useful silsesquioxanes include compounds of the formula RSiO3/2 where R is an optionally substituted alkyl or aryl of up to 7 carbon atoms, and/or co-condensates of hydrosylates of tetraalkoxysilanes with organotrialkoxysilanes having RSiO3/2 or SiO2 units.
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