Patent ID: 7488762

Claim:
A two paste glass ionomer cement which comprises a resin-based paste and a water-based paste, which is characterized in that: the resin-based paste is substantially free of water and comprises (a) a hydrophobic polymerizable monomer and (b) a polymer of acidic group-containing polymerizable monomers, wherein (a) the hydrophobic polymerizable monomer and (b) the polymer of acidic group-containing polymerizable monomers are insoluble to each other and (b) the polymer of acidic group-containing polymerizable monomers exists in a solid state in the resin-based paste, and the water-based paste comprises (c) a hydrophilic polymerizable monomer and (d) water, wherein (c) the hydrophilic polymerizable monomer and (d) the water are soluble to each other, and wherein (1) at least one of the resin-based paste and the water-based paste contains (e) an acid reactive filler and (f) a polymerization catalyst together; (2) the resin-based paste contains (e) an acid reactive filler and the water-based paste contains (f) a polymerization catalyst; or (3) the resin-based paste contains (f) a polymerization catalyst and the water-based paste contains (e) an acid reactive filler.