Patent ID: 6855674

Claim:
A compound of the general formula (I): wherein: Ar is a polynuclear aromatic moiety; R 1 and R 2 are independently selected from H and C 1 -C 30 straight or branched chain hydrocarbyl groups optionally containing one or more hetero atoms selected from N, O and S; R 3 is a straight or branched chain hydrocarbyl group; R 4 is H or a C 1 to C 9 straight or branched chain hydrocarbyl group; q is 1 or 2; x is 1 to 3; y is from 1 to 2 times the number of aromatic rings in Ar; and z is zero to a number equal to the number of remaining substitutable hydrogens on aromatic moiety Ar; wherein a hydroxyl group attached to Ar combines with N—R 1 to form a substituted or unsubstituted 6 membered oxazine ring, provided that, when z is 0, R 2 is not H.