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

US6306926A · kind A · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Kathyrn Bretscher · Minneapolis, US
• Richard P. Rusin · Woodbury, US
• Bradley D. Craig · Lake Elmo, US
• Sumita B. Mitra · West St. Paul, US
• Joel D. Oxman · Minneapolis, US
• Janis R. Gust · Minneapolis, US
• Cheryl Hayne · Minneapolis, US
• James W. Westberg · Willernie, US
• Matthew C. Trom · Cottage Grove, US
• Brant U. Kolb · Afton, US
• Dwight W. Jacobs · Hudson, US
• David A. Kaisaki · Windom, US
• James A. Baker · Hudson, US

Key dates

• Filing date: Oct 7, 1998
• Grant date: Oct 23, 2001
• Expiry date: Oct 7, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2993
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

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.degree. C.