RADIOPAQUE CATIONICALLY POLYMERIZABLE COMPOSITIONS COMPRISING RADIOPACIFYING FILLER, AND METHOD FOR POLYMERIZING 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: 27.12.2012
• 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 prepare a useful composite based upon a cationic initiater, a cationically polymerizable resin and a radiopacifying filler.SOLUTION: A polymerizable compositions 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 including a radiopacifying filler in an amount sufficient to render the polymerizable composition radiopaque, wherein the radiopacifying filler is selected from the group consisting of metal oxides, metal halides, metal borates, metal phophates, metal silicates, metal carbonates, metal germanates, metal tetrafluuoroborates, metal hexafluoroborates, metal hexafluorophsphates and combinations thereof. The components (a), (b), and (c) are selected such that the polymerizable composition polymerizes to form a polymerized composition having a Barcol hardness, measured using a GYZJ-935 meter, of at least 10 within 30 minutes following initiation of the cationically active functional group at a reaction temperature of 25°C.