Orthodontic articles comprising cured free-radically polymerizable composition with improved strength in aqueous environment

US11584817B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Tianyu Wu · Okabena, US
• Saswata Chakraborty · Cottage Grove, US
• Benjamin C. MacMurray · Minneapolis, US
• Richard J. Pokorny · Maplewood, US
• Thomas P. Klun · Lakeland, US
• Wayne S. Mahoney · Windom, US
• Chad M. Amb · Roberts, US
• Ahmed S. Abuelyaman · Woodbury, US
• Robert S. Clough · Windom, US
• John M. Riedesel · San Jose, US
• James D. Hansen · White Bear Lake, US
• Ian Dailey · Maplewood, US
• Daniel J. Skamser · Albuquerque, US
• Eric W. Nelson · Stillwater, US
• George W. Griesgraber · Eagan, US
• Dana R. Reed · Minneapolis, US

Key dates

• Filing date: Jun 26, 2019
• Grant date: Feb 21, 2023
• Expiry date: Jun 26, 2039

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29L2031/7536
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Orthodontic articles and polymerizable resin compositions are described. The orthodontic article comprises a cured composition comprising the reaction product of free-radically polymerizable resin comprising 30 to 70 wt. %, inclusive, of at least one urethane component, and 25 to 70 wt. %, inclusive, of reactive diluent(s) comprising at least one monofunctional (meth)acrylate monomer. The polymerizable resin comprises no greater than 35 wt. % of reactive diluent(s) having a high affinity for water. Reactive diluent(s) such as monofunctional (meth)acrylate monomers having a high affinity for water have low log P values. In one embodiment, the polymerizable resin comprises at least one acidic monomer.