Patent ID: 7179530

Claim:
A composite material comprising a microparticle support consisting essentially of polymeric organic particles and having metallic ions and non-metallic cations grafted to the surface of the support, wherein the particles are a copolymer of at least three monomer units, i. the first monomer unit having the formula wherein R 1 , R 2 , and R 3 are independently selected from the group consisting of hydrogen, a C 1-3 alkyl group, and a halogenated C 1-3 alkyl group; said monomer having either E or Z configuration; ii. the second monomer unit being selected from the group consisting of C 1-3 alkyl esters of acrylic acid, methacrylic acid, and crotonic acid; and iii. the third monomer unit being an ethylenically unsaturated monomer having at least one acid group.