The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 16, 2015
Filed:
Feb. 08, 2012
Guy D. Joly, Shoreview, MN (US);
Larry R. Krepski, White Bear Lake, MN (US);
Babu N. Gaddam, Woodbury, MN (US);
Ahmed S. Abuelyaman, Woodbury, MN (US);
Bradley D. Craig, Lake Elmo, MN (US);
Timothy D. Dunbar, Woodbury, MN (US);
Chuntao Cao, Woodbury, MN (US);
Joel D. Oxman, Minneapolis, MN (US);
Afshin Falsafi, Woodbury, MN (US);
William H. Moser, St. Paul, MN (US);
Hoa T. Bui, Mendota Heights, MN (US);
Guy D. Joly, Shoreview, MN (US);
Larry R. Krepski, White Bear Lake, MN (US);
Babu N. Gaddam, Woodbury, MN (US);
Ahmed S. Abuelyaman, Woodbury, MN (US);
Bradley D. Craig, Lake Elmo, MN (US);
Timothy D. Dunbar, Woodbury, MN (US);
Chuntao Cao, Woodbury, MN (US);
Joel D. Oxman, Minneapolis, MN (US);
Afshin Falsafi, Woodbury, MN (US);
William H. Moser, St. Paul, MN (US);
Hoa T. Bui, Mendota Heights, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
Dental compositions are described comprising an addition-fragmentation agent comprising at least one ethylenically unsaturated terminal group and a backbone unit comprising an α,β-unsaturated carbonyl; at least one monomer comprising at least two ethylenically unsaturated group; and inorganic oxide filler. The addition-fragmentation agent is preferably free-radically cleavable. The addition-fragmentation agent preferably comprises at least two ethylenically unsaturated terminal groups, such as (meth)acTylate groups. In some embodiments, the addition-fragmentation agent has the formula: wherein R, Rand Rare each independently Z, -Q-, a (hetero)alkyl group or a (hetero)aryl group with the proviso that at least one of R, Rand Ris Z-Q-; Q is a linking group have a valence of m+1; Z is an ethylenically unsaturated polymerizable group; m is 1 to 6; each X1 is independently —O— or —NR—, where Ris H or C-Calkyl; and n is 0 or 1. Also described are dental articles prepared from a dental composition comprising an addition-fragmentation agent and methods of treating a tooth surface.