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