3m Innovative Properties Company

James W Westberg

Joel D Oxman

Brant Ulrick Kolb

James A Baker

Bradley Dene Craig

Richard Paul Rusin

Matthew C Trom

Sumita Basu Mitra

Dwight W Jacobs

David A Kaisaki

Janis R Gust

Kathyrn R Bretscher

Cheryl A Hayne

Polymerizable compositions that include: (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 various radiopacifying fillers in an amount sufficient to render the polymerizable composition radiopaque. 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&#xb0; C.

Radiopaque cationically polymerizable compositions comprising a radiopacifying filler, and method for polymerizing same

Polymerizable compositions that include: (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 various radiopacifying fillers in an amount sufficient to render the polymerizable composition radiopaque. 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&deg; C.

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Willernie, MN, United States of America

James W Westberg