| http://www.w3.org/ns/prov#value | - The A block comprises a polymer formed from a monovinyl aromatic monomer of the formula: ##STR1## wherein n is an integer of 0 to 3, R1 is individually selected from the group of alkyl radicals containing up to about 5 carbon atoms and R2 is H-- or CH3 -- and mixtures thereof.
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