Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1994-05-16
1996-03-26
Szekely, Peter A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
523116, 4331681, 433171, 4331991, 4332011, 433213, 526321, 5263231, A61C 1308, A61C 1300, C08F12018, C08F12020
Patent
active
055020879
ABSTRACT:
A dental prosthesis includes polymeric material formed by heat curing a polymerizable composition having at least 5 percent by weight of at least one polymerizable Monomer having at least one acrylic moiety and a gram molecular weight of at least 200. The polymeric material is preferably formed by heat curing and has an unnotched Izod impact strength of at least 2.5 and more preferably at least 3.0 ft.lb/in as measured by a Modified ASTM D256, and a flexural fatigue life of at least 20,000 flexes to failure at 0.1 inch deflection. Preferably the polymerizable monomer has a vapor pressure less than 5 mm Hg at 23.degree. C. A method of making a denture is provided which includes molding and polymerizing the polymerizable composition to form a denture. Preferably the polymerizable composition includes polymerizable compounds made up of at least 5 percent by weight of the acrylic Monomer having a gram molecular weight of at least 300 and less than 5 percent by weight of Volatile compounds and less than 2 percent by weight of Low Molecular Weight acrylic compounds having a gram molecular weight of less than 200.
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Latta Mark A.
Shaffer Scott E.
Tateosian Louis H.
Bieber James B.
Dentsply Research & Development Corp.
Hanson, Jr. Edward J.
Lovercheck Dale R.
Szekely Peter A.
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