RADIOPAQUE CATIONICALLY POLYMERIZABLE COMPOSITION COMPRISING RADIATION SHIELDING FILLER, AND METHOD FOR POLYMERIZING THE SAME

• Main Authors: MITRA SUMITA B, OXMAN JOEL D, KOLB BRANT U, HAYNE CHERYL A, WESTBERG JAMES W, BRETSCHER KATHRYN R, GUST JANIS R, JACOBS DWIGHT W, BAKER JAMES A, CRAIG BRADLEY D, KAISAKI DAVID A, TROM MATTHEW C, RUSIN RICHARD P
• Format: Patent
• Language: English
• Published: 02.04.2010
• Subjects: APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; DENTISTRY; HUMAN NECESSITIES; HYGIENE; INORGANIC CHEMISTRY; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MEDICAL OR VETERINARY SCIENCE; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

PROBLEM TO BE SOLVED: To produce a useful composite material which is based on a cationic initiator, a cationically polymerizable resin, and a radiation shielding filler. SOLUTION: A polymerizable composition is provided, which includes (a) a cationically active functional group, (b) an initiation system capable of initiating cationic polymerization of the cationically active functional group, and (c) a filler composition that includes a radiation shielding filler in an amount sufficient to render the polymerizable composition radiopaque. The radiation shielding filler is selected from the group consisting of a metal oxide, a metal halide, a metal borate, a metal phosphate, a metal silicate, a metal carbonate, a metal germanate, a metal tetrafluoroborate, a metal hexafluorophosphate, and combinations thereof. Components (a), (b), and (c) are selected such that the polymerizable composition polymerizes to form a polymerized composition having a Barcol hardness, measured by using a GYZJ-935 hardness meter, of at least 10 within 30 min following initiation of the cationically active functional group at a reaction temperature of 25°C. COPYRIGHT: (C)2010,JPO&INPIT