The present invention provides for a composition comprising a siloxane
having the formula:
M.sup.1DM.sup.2
wherein M.sup.1=(R.sup.1)(R.sup.2)(R.sup.3)SiO.sub.1/2;
M.sup.2=(R.sup.4)(R.sup.5)(R.sup.6)SiO.sub.1/2 and
D=(R.sup.7)(Z)SiO.sub.2/2 where R.sup.1, R.sup.2, R.sup.3, R.sup.4,
R.sup.5, R.sup.6 and R.sup.7 are each independently selected from the
group consisting of 1 to 4 carbon monovalent hydrocarbon radicals, aryl,
and a hydrocarbon group of 4 to 9 carbons containing an aryl group; Z is
a pendant hydrophilic ionic group selected from the group consisting of
R.sup.8--R.sup.A, R.sup.9--R.sup.C, and R.sup.10--R.sup.Z; R.sup.A being
an anionic substituent, R.sup.C a cationic substituent or R.sup.Z a
zwitterionic substituent on the D group wherein the composition is
resistant to hydrolysis under either basic or acidic conditions.
