| http://www.w3.org/ns/prov#value | - Such modifier compositions can be prepared by methods known in the art, and especially by the reaction of a glyoxal (Formula I) with one or more dihydric alcohols (Formula II). ##STR3## The cyclic acetals prepared as described above generally are characterized as having the formula ##STR4## In general, R and R' in the above formulae are each independently hydrogen, alkyl or aryl groups, and each A
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