Patent ID: 7115899

Claim:
A copolymer comprising at least one monomeric unit having Formula I: wherein: R 1 is the same or different at each occurrence and is selected from hydrogen, C 1 –C 20 alkyl, C 2 –C 20 alkenyl, C 2 –C 20 alkynyl, C 1 –C 20 alkoxy, C 1 –C 20 oxyalkyl, C 2 –C 20 oxyalkenyl, C 2 –C 20 oxyalkynyl, C 1 –C 20 fluorinated alkyl, C 2 –C 20 fluorinated alkenyl, C 1 –C 20 fluorinated oxyalkyl, C 2 –C 20 fluorinated oxyalkenyl, C 2 –C 20 fluorinated oxyalkynyl, aryl, heteroalkyl, heteroalkenyl, heteroalkynyl, heteroaryl, —CN, —OR 3 , —CO 2 R 3 , —SR 3 , —N(R 3 ) 2 , —P(R 3 ) 2 , —SOR 3 , —SO 2 R 3 , and —NO 2 ; R 2 is the same or different at each occurrence and is selected from C 1 –C 20 alkyl, C 2 –C 20 alkenyl, C 2 –C 20 alkynyl, C 1 –C 20 alkoxy, C 1 –C 20 oxyalkyl, C 2 –C 20 oxyalkenyl, C 2 –C 20 oxyalkynyl, C 1 –C 20 fluorinated alkyl, C 2 –C 20 fluorinated alkenyl, C 1 –C 20 fluorinated oxyalkyl, C 2 –C 20 fluorinated oxyalkenyl, C 2 –C 20 fluorinated oxyalkynyl, heteroalkyl, heteroalkenyl, heteroalkynyl, —CN, —OR 3 , —CO 2 R 3 , —SR 3 , —N(R 3 ) 2 , —P(R 3 ) 2 , —SOR 3 , —SO 2 R 3 , and —NO 2 ; or adjacent R 2 groups together can form a 5- or 6-membered cycloalkyl or heterocycloalkyl ring, and R 3 is a substituent on a heteroatom which can be the same or different at each occurrence and is selected from hydrogen, alkyl, aryl, heteroalkyl and heteroaryl; and at least one second monomeric unit comprising an aromatic group.