Patent ID: 8304161

Claim:
A silsesquioxane resin comprised of the units (Ph(CH 2 ) r SiO (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 1 SiO (3-x)/2 (OR′) x ) q where Ph is a phenyl group, Me is a methyl group; R′ is hydrogen atom or a hydrocarbon group having from 1 to 4 carbon atoms; R is an aryl sulfonate ester group or a mixture of an aryl sulfonate ester group and an equivalent aryl sulfonic acid group with the proviso that in the mixture the majority of R are aryl sulfonate ester groups; and R 1 is selected from substituted phenyl groups, ester groups, polyether groups; mercapto groups, and reactive or curable organic functional groups; and r has a value of 0, 1, 2, 3, or 4; x has a value of 0, 1 or 2; wherein in the resin m has a value of 0 to 0.95; n has a value of 0.05 to 0.95; o has a value of 0.05 to 0.95; p has a value of 0.025 to 0.5; q has a value of 0 to 0.5; and m+n+o+p+q≈1.