Stable one part dental compositions employing ipn technology
October 6, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3427274 3470615 Fast curing resinous compositions Dental materials which are opaque to X-rays and are based on organic plastics in paste form Dental materials based on organic plastics in paste form Dental material based on crosslinked plastic and polymerizable binder Dental appliances having interpenetrating polymer networks Blend of cross-linked polymer, swelling monomer and cross-linking agent and curing process Permanent dental restorative material Patent #: 4433958 InventorsAssigneeApplicationNo. 06/605629 filed on 04/30/1984US Classes:522/95, With solid polymer derived solely from ethylenic monomers264/17, Denture forming522/10, With a tertiary amine specified rate-affecting material522/102, With solid polymer derived solely from ethylencally unsaturated monomers522/110, At least one solid polymer derived from ethylenic monomers has at least two ethylenic groups522/908, DENTAL UTILITY523/115, Composition suitable for use as tooth or bone replacement, restorative, or implant525/193, Agent contains an ethylenic group525/217Solid polymer derived from reactant containing nitrogen atom other than from (meth)acrylonitrileExaminersPrimary: Bleutge, John C.Assistant: Koeckert, Arthur H. Attorney, Agent or FirmInternational ClassesA61K 6/02 (20060101)A61K 6/08 (20060101) C08F 291/00 (20060101) C08F 265/06 (20060101) C08F 265/00 (20060101) AbstractCompositions hardenable by exposure to heat or electromagnetic radiation are provided by dissolving together to form a blend from about 0% to about 50% by weight of an uncrosslinked polymer, from about 2% to about 30% of a polymerizable monomer, from about 10% to about 70% of a crosslinked polymer in the form of discrete particles having average diameters of from 0.001 micron to about 500 microns and being swollen in said solution and from about 20% to about 70% of a crosslinking agent for said monomer. Such compositions exhibit superior chemical and physical characteristics when hardened and are suitable in a wide variety of applications as construction media. Such compositions are especially suitable in the production of prosthetic dental appliances, such as, for example, prosthetic teeth. It is believed that the hardening of such compositions as, for example, during the preparation of dental appliances forms a polymer system known as an interpenetrating polymer network. | |
