Patent ID: 7504046
Filing Date: 2009-03-17
Classification: C09K

Abstract:
1. A polymer grafted rare earth ions activated alkaline earth aluminate long afterglow phosphor through coordination bond, characterized in that said phosphor is the product of polymerization of organic monomer on the surface of difunctional ligand coordinated rare earth ions activated alkaline earth aluminate, it has the following formula: wherein A is difunctional ligand coordinated rare earth ions activated alkaline earth aluminate phosphor, it is the product of the coordinative bonding between the rare earth ions activated alkaline earth aluminate and the difunctional ligands; wherein the rare earth ions activated alkaline earth aluminates have the chemical formula: where M represents at least one alkaline earth ions selected from the groups consisting of Ca E represents at least one rare earth ions selected from the groups consisting of Ce x is an integer from 1 to 4; y is an integer from 2 to 14; z is an integer from 4 to 25; wherein the difunctional ligands are selected from the group consisting of polymerizable β-diketones, polymerizable multi-carboxylic acids and anhydrides, polymerizable amines or polymerizable heterocyclic compounds wherein B is the unit in the copolymer or homopolymer of organic monomers; n is an integer from 1 to 1000000.