Patent ID: 8344073

Claim:
A compound of formula I: wherein R a is a polyolefin group obtained by cationic polymerization or a polyisobutyl group; R 1 and R 2 are each, independently in each —(CR 1 R 2 ) unit, H or alkyl; and m is an integer from 1 to 20; wherein if m is 1 and at least one of R 3 and R 4 is not H, then R 3 and R 4 are each, independently, H, alkyl, or alkoxy, and X is H, alkyl, alkynyl, alkaryl, aralkyl, aryl, heteroaryl or wherein R 5 -R 7 are each, independently, alkyl or aryl; if m is 1 and R 3 and R 4 are both H, X is alkyl, alkynyl, alkaryl, aralkyl, aryl, heteroaryl, or wherein R 5 -R 7 are each, independently, alkyl or aryl; if m is 2, R 1 and R 2 are H, and —O—(CR 1 R 2 ) m —X is ortho to R 4 , then R 3 is H, alkyl, or alkoxy, and X and R 4 , together, with the atoms to which X and R 4 are attached, form a ring; if m is 2-20, then R 3 and R 4 are each, independently, H, alkyl, or alkoxy, and X is H, alkyl of 1 to about 6 carbons, —F, —Cl, —Br, or —I; if m is 3-20, then R 3 and R 4 are each, independently, H, alkyl, or alkoxy, and X is —OH.