Patent ID: 8546519

Claim:
A polyketal having structure I: wherein α is 1 or 2; R 1 is hydrogen, a metal cation, an organic cation, a linear, branched, or cyclic alkyl, a linear, branched, or cyclic alkenyl, alkynyl, aryl, alkaryl, or an oligomeric or polymeric moiety; and optionally contains one or more heteroatoms; and R 1 is the same or different for each occurrence; R 2 , R 3 , R 5 and R 6 are independently hydrogen, a linear, branched, or cyclic alkyl, a linear, branched or cyclic alkenyl, alkynyl, aryl, or alkaryl; and optionally contains one or more heteroatoms; R 2 , R 3 , R 4 , R 5 and R 6 is the same or different for each occurrence; R 4 is a linear, branched, or cyclic alkyl, a linear, branched or cyclic alkenyl, alkynyl, aryl, or alkaryl; and optionally contains one or more heteroatoms; and R 4 is the same or different for each occurrence; R 7 is a covalent bond, methylene, ethylene, or —CH 2 —O—CH 2 — and R 7 is the same or difference for each occurrence, provided that when α is 1, R 7 is not —CH 2 —O—CH 2 —; R 8 and R 9 are hydrogen; a is 0 or an integer of 1 to 12 wherein a is the same or different for each occurrence; and b is 0 or 1, wherein b=0 indicates a five membered ring, and b=1 indicates a 6 membered ring, and b is the same or different for each occurrence.