Patent ID: 8318258

Claim:
A silsesquioxane resins having the formula (PhSiO (3−x)/2 (OR′) x ) m (HSiO (3−x)/2 (OR′) x ) n (MeSiO (3−x)/2 (OR′) x ) o (RSiO (3−x)/2 (OR′) x ) p (R 2 SiO (3−x)/2 (OR′) x ) q where Ph is a phenyl group, Me is a methyl group; R is a mercaptoalkyl group of the formula HS(CH 2 ) z — where z has a value of 1 to 18; R′ is hydrogen atom or a hydrocarbon group having from 1 to 4 carbon atoms; R 2 is selected from ester groups, polyether groups; and polyethylene oxide groups; x has a value of 0, 1 or 2; m has a value of 0.01 to 0.97; n has a value of 0.01 to 0.97; o has a value of 0.01 to 0.97; p has a value of 0.01 to 0.97; q has a value of 0 to 0.96; and m+n+o+p+q≈1.