Phosphonic acid-pendent benzoxazole copolymers

摘要

Alcohol-soluble aromatic heterocyclic copolymers having repeating units of the formula: <IMAGE> +TR <IMAGE> wherein x has a value of 0.05 to 0.50 and y has a value of 1.0-x. These copolymers are useful in the preparation of organic/inorganic hybrid materials having transparency which comprise the sol-gel derived, hydrolytically condensed reaction product of a metal alkoxide of the formula M(OR)w wherein R is a lower alkyl group, M is Si, Ti, Al or a mixture thereof, and w is the valence value of M, and the above copolymer.