Photocurable dental filling compositions
Patent 4110184 Issued on August 29, 1978. Estimated Expiration Date: 
August 29, 1995. 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.
August 29, 1995. 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 ReferencesInventorsAssigneeApplicationNo. 05/514289 filed on 10/11/1974US Classes:522/18, Specified rate-affecting material contains phosphorous, arsenic, antimony or nitrogen atom260/998.11, DENTAL430/284.1, Urethane430/285.1, Polyester430/913, Initiator containing522/36, Containing two or more ketone groups522/37, Adjacent (C=O)* groups where * is at least two522/83, Oxygen containing DNRM522/96, With ethylenic reactant523/116, Cement or filling composition524/871, N=C=X containing reactant forming a solid polymer or SICP in the presence of a nonreactant material (X is chalcogen)528/48, Process of polymerizing in the presence of a specified material other than reactant528/76, With ether or thioether compound containing at least two -C-X-C- groups528/80, With reactant compound containing at least two -C-C(=X)-X-C groups and which compound is devoid of C-NH, C=NH or C-N(H)-H groups528/85With reactant containing at least two -XH groupsExaminersPrimary: Turer, Richard B.Attorney, Agent or FirmInternational ClassesA61K 6/09 (20060101)A61K 6/02 (20060101) Foreign Application Priority Data1973-04-24 GBAbstractA dental filling composition comprising(a) from 60 to 80% by weight of the composition of an inorganic particulate filler selected from glass, quartz or silica of which at least 50% of the particles have a maximum dimension of not greater than 300 microns, and(b) a polymerizable material comprising:A polymerizable prepolymer being the reaction product of a urethane prepolymer and 2-hydroxy-ethyl methacrylate;The said urethane prepolymer being the reaction product of a di-isocyanate selected from the group consisting of 4,4'-di-isocyanatodiphenylmethane, hexamethylene di-isocyanate, 4,4'-dicyclohexylmethane di-isocyanate and 2,4-tolylene di-isocyanate, and a diol being the condensate obtained by reacting 2,2-bis-(p-hydroxyphenyl)propane and propylene oxide in a molar ratio of 1:2;Up to 100% by weight of the polymerizable prepolymer of methacrylic acid or an ester of methacrylic acid selected from the group consisting of methyl methacrylate, ethylene glycol dimethacrylate, hydroxyethyl methacrylate, triethylene glycol dimethacrylate and allyl methacrylate;And from 0.01 to 10% by weight of the polymerizable material of a photosensitive catalyst comprising a photosensitizer selected from the group consisting of fluorenone, benzil, camphorquinone and -naphthil, and a reducing agent being dimethylaminoethyl methacrylate. |
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