Patent ID: 8378093

Claim:
A compound of the formula 2 wherein R 9 -R 16 each independently represents methyl, and wherein R 1 -R 8 are each independently a member selected from the group consisting of i) SR A in which R A represents a —CH 2 CH 2 O(CH 2 CH 2 O) n group in which n=0-5; ii) COOR B in which R B represents an alkyl chain from C1 to C20 or a —CH 2 CH 2 O(CH 2 CH 2 O) n group in which n=0-5; iii) CH 2 Ar, in which Ar represents an aryl group; and iv) CH 2 XR C in which X represents and O, S, or N atom and R C represents an alkyl chain of from C1 to C20 or a —CH 2 CH 2 O(CH 2 CH 2 O) n group in which n=0-5.