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