c) at least one vinyl unsaturated additive having both an ionic moiety and a hydrophobic moiety and containing at least 5 but {HEAD ~ not more than 40 carbon atoms} in an amount of from about 0.1 parts by weight to {TAIL ~ 3 parts} by weight of the microspheres, 
c ) at least one vinyl unsaturated additive having both an ionic moiety and a hydrophobic moiety and containing at least 5 but { HEAD ~ not more than 40 carbon atoms } in an amount of from about 0.1 parts by weight to { TAIL ~ 3 parts } by weight of the microspheres ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH