Definition ,Basic methacrylate copolymer is manufactured by thermic controlled polymerisation of the monomers methyl methacrylate, butyl methacrylate and dimethylaminoethyl methacrylate (dissolved in propan-2-ol), by using a free radical donor initiator system. An alkyl mercaptane is used as chain modifying agent. The polymer solution is extruded and granulated under vacuum to remove residual volatile components. The granules resulting are commercialized as such or undergo a milling step (micronisation).,
Particle size of the powder (when used forms a film),  < 50 μm at least 95 %    < 20 μm at least 50 %    < 3 μm not more than 10 %  ,