| http://www.w3.org/ns/prov#value | - t, or in the presence of a strong carboxylic acid having a maximum pka value of about 4, optionally in the presence of a solvent; dipping the substrate in the resulting mixture; removing the coated Substrate from the mixture and drying the coating to generate a substrate coated with a composition of formula II X(SiO1.5)n (II) wherein n is an integer greater th
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