The graft polymerization precursor 1, {HEAD ~ wherein at least 50%} by {TAIL ~ weight} of said vinyl monomer component consists of methacrylic ester monomers, acrylic ester monomers or mixtures thereof 
by
The graft polymerization precursor 1 , { HEAD ~ wherein at least 50 % } by { TAIL ~ weight } of said vinyl monomer component consists of methacrylic ester monomers , acrylic ester monomers or mixtures thereof
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH