Polycation carrier particle

A polycation carrier particle obtained by the polymerization of an acrylate monomer with one or more hydrophilic monomers to form crosslinks, wherein the polycation carrier particle has a net positive electric charge and wherein the acrylate monomer is selected from formula I or formula V

• and wherein R and R″ are each independently a hydrogen, a C1-C14 linear or branched alkyl, a C3-C8 cycloalkyl, or a 5 to 10 membered aryl or heteroaryl ring, optionally terminated by a polymerizable group, capable of crosslinking with the one or more hydrophilic monomers,
• R′ is a C2-C14 linear or branched alkyl, a C3-C8 cycloalkyl, or a 5 to 10 membered aryl or heteroaryl ring, and R′ is terminated by at least one polymerizable group, capable of crosslinking with the one or more hydrophilic monomers,
• the alkyl, cycloalkyl, aryl and heteroaryl can be optionally substituted and optionally interrupted by one or more oxygen, sulfur or nitrogen atoms, and
• R2 is C2 or C3 and wherein C3 is linear or cyclic.