Patent application number | Description | Published |
20080220396 | Methods for making dental restorations using two-phase light-curing materials - Methods for making dental crowns, bridges, inlays, onlays, veneers, fillings, and other restorations are provided. The methods involve using a two-phase light curing (TPLC) material. Preferably, the TPLC material used to form the dental restoration comprises a blend of polymerizable compounds; photopolymerization systems (a) and (b), and particulate filler materials (a) and (b). In a first light-curing step, curing light having a wavelength of greater than 420 nm is used to activate system (a). In a second light-curing step, curing light having a wavelength of less than 420 nm is used to activate system (b). The two step light-curing method is efficient and allows the dentist to make restorations having high mechanical strength and pleasing aesthetics. | 09-11-2008 |
20090269723 | Methods for preparing chair-side dental crowns - The invention provides a method of forming dental restorations, particularly dental crowns. The method involves applying a flexible spacer material having a polymerization system capable of being activated by light to a prepared tooth surface. A composite crown-forming material is dispensed into a transparent plastic matrix. The matrix is placed in the mouth of the patient so the composite material is molded over the tooth surface coated with the spacer material. Then, the composite is irradiated with curing light, through the matrix, so that it hardens to form a dental crown. The crown is removed, trimmed and finished, and then permanently affixed to the tooth. | 10-29-2009 |
20110027759 | METHODS FOR PREPARING CHAIR-SIDE DENTAL CROWNS - The invention provides a method of forming dental restorations, particularly dental crowns. The method involves applying a flexible spacer material having a polymerization system capable of being activated by light to a prepared tooth surface. A composite crown-forming material is dispensed into a transparent plastic matrix. The matrix is placed in the mouth of the patient so the composite material is molded over the tooth surface coated with the spacer material. Then, the composite is irradiated with curing light, through the matrix, so that it hardens to form a dental crown. The crown is removed, trimmed and finished, and then permanently affixed to the tooth. | 02-03-2011 |
20120329006 | TISSUE MANAGEMENT IMPRESSION MATERIAL AND DISPENSING SYSTEM - Disclosed herein are a tissue management impression material and a method of application into the sulcus of a patient, whereby the tissue management impression material is a part of the final dental impression made when manufacturing a dental device, such as a crown. | 12-27-2012 |
Patent application number | Description | Published |
20080214684 | Process for Dissolution of Highly Fluorinated Ion-Exchange Polymers - Highly fluorinated ion-exchange polymers achieve dissolution in aqueous tetrahydrofuran at lower pressures and temperatures than in other solvents, with few or no side products being formed. | 09-04-2008 |
20100264365 | MISCIBILITY OF OTHERWISE IMMISCIBLE COMPOUNDS - The present invention relates to a novel method for compatibilizing, i.e. improving miscibility of, otherwise immiscible organic materials highly useful in the fibers industry, as well as the compatibilized product of the method. These compatibilized products are stable in the liquid phase at temperatures ranging from about 40° C. to about 200° C. The method involves use of a glycol derived from polymerization of alkylene oxide and tetrahydrofuran, the alkylene oxide having from 2 to 4 carbon atoms, i.e. poly(tetramethylene-co-alkyleneether) glycol, in the mixture. | 10-21-2010 |
20100267905 | COPOLYETHER GLYCOL MANUFACTURING PROCESS - The present invention provides a process for manufacturing copolyether glycol having a mean molecular weight of from about 650 to about 5000 dalton by polymerization of tetrahydrofuran and at least one alkylene oxide in the presence of an acid catalyst and at least one compound containing reactive hydrogen atoms. More particularly, the invention relates to a process for manufacturing copolyether glycol which comprises recycle to the polymerization reaction step of at least a portion of the oligomeric cyclic ether which is co-produced with the copolyether glycol. | 10-21-2010 |
20100267926 | COPOLYETHER GLYCOL MANUFACTURING PROCESS - The present invention relates to a continuous process for manufacturing copolyether glycols with high incorporation of alkylene oxide by polymerization of tetrahydrofuran and at least one alkylene oxide in the presence of an acid catalyst, at least one compound containing reactive hydrogen atoms, and a specific diluent or solvent. More particularly, the invention relates to a diluent or solvent-assisted continuous process for manufacturing copolyether glycols with high incorporation of alkylene oxide. | 10-21-2010 |
20110008554 | OXYGEN SCAVENGING PLASTIC COMPOSITIONS - The present invention relates to a composition comprising a polyester, a copolyester ether and an oxidation catalyst, wherein the copolyester ether comprises a polyether segment comprising poly(tetramethylene-co-alkylene ether). The composition has oxygen scavenging properties and produces articles having low haze. Other embodiments of the present invention disclosed herein are articles made from the composition and methods to make such articles. | 01-13-2011 |
20110207910 | POLYETHER GLYCOL MANUFACTURING PROCESS - The present invention relates to an improved process for manufacturing polyether and copolyether glycols by polymerization of a reaction mixture comprising at least one tetrahydrofuran or at least one tetrahydrofuran and at least one other cyclic ether, for example, an alkylene oxide, in the presence of a particular perfluorosulfonic acid resin catalyst comprising a copolymer of tetrafluoroethylene (TFE) or chlorotrifluoroethylene (CTFE) and a monomer of the formula CF | 08-25-2011 |
20110245357 | Process for Dissolution of Highly Fluorinated Ion-Exchange Polymers - Highly fluorinated ion-exchange polymers achieve dissolution in aqueous tetrahydrofuran at lower pressures and temperatures than in other solvents, with few or no side products being formed. | 10-06-2011 |
20120259090 | COPOLYETHER GLYCOL MANUFACTURING PROCESS - The present invention provides a highly efficient process for manufacturing copolyether glycol having a mean molecular weight of from about 650 to about 5000 dalton by polymerization of tetrahydrofuran and at least one alkylene oxide in the presence of an acid catalyst and at least one compound containing reactive hydrogen atoms. More particularly, the invention relates to a process for manufacturing copolyether glycol which comprises recycle to the polymerization reaction step of at least a portion of the oligomeric cyclic ether which is co-produced with the copolyether glycol, said process exhibiting an Space Time Yield value of greater than about 0.9. | 10-11-2012 |
20120302722 | COPOLYETHER ESTER ELASTOMER - The present invention relates to a new thermoplastic copolyether ester elastomer composition comprising a soft segment and a hard segment. The soft segment of the copolyether ester elastomer composition is derived from a random poly(oxyethylene-co-oxytetramethylene ether)glycol and the hard segment is composed of short chain polyester. The present invention also relates to a method for manufacturing the new copolyether ester elastomer composition, and products comprising same. | 11-29-2012 |
20130046116 | INTEGRATED COPOLYETHER GLYCOL MANUFACTURING PROCESS - The present invention relates to an improved, fully-integrated continuous process of enhanced process operability for manufacturing copolyether glycols having enhanced physical properties by polymerization of a reaction mixture comprising tetrahydrofuran and at least one alkylene oxide in the presence of an acid catalyst and at least one compound containing reactive hydrogen atoms. The copolyether glycols manufactured by the present process have enhanced physical properties of increased alkylene oxide incorporation, average molecular weight and polydispersity, as well as reduced crystallinity, color, oligomeric cyclic ether content, and linear oligomer having an average molecular weight of up to about 400 dalton content. | 02-21-2013 |
20130197143 | ELASTOMERIC COMPOSITIONS - The present invention relates to a novel polyurethane, copolyether ester or copolyether amide elastomer composition comprising a glycol derived from random copolymerization of alkylene oxide and tetrahydrofuran (THF), the alkylene oxide having from 2 to 4 carbon atoms, i.e., poly(tetramethylene-co-alkyleneether)glycol. | 08-01-2013 |
20140001402 | MISCIBILITY OF OTHERWISE IMMISCIBLE COMPOUNDS | 01-02-2014 |
20140206907 | METHOD FOR PREVENTING PRESSURE BUILD UP IN A CATALYST SEPARATION SYSTEM - A method for preventing pressure build-up across a catalyst separation in a polyether polyol reactor comprising the steps of feeding reactants that comprise a monomer or co-monomers to be polymerized to form the polyether polyol into a continuous feed reactor, flowing the product stream through a catalyst separation system within the reactor, wherein the catalyst separation system is comprised of a plurality of filters, wherein each filter comprises an outer surface and an inner surface defined by a plurality of spaced-apart elements, and wherein the distance between the spaced-apart elements is smaller than the minor dimension of the suspended catalyst and recovering the filtered polyether polyol product and catalyst fines from the reactor outlet. | 07-24-2014 |
20140323772 | POLYETHER GLYCOL MANUFACTURING PROCESS - The present invention relates to an improved process for manufacturing polyether and copolyether glycols by polymerization of a reaction mixture comprising at least one tetrahydrofuran or at least one tetrahydrofuran in the presence of a particular perfluorosulfonic acid resin catalyst comprising a copolymer of tetrafluoroethylene (TFE) or chlorotrifluoroethylene (CTFE) and a monomer of the formula CF | 10-30-2014 |
20140378712 | ALKANOLYSIS PROCESS - The present invention provides an improved process for converting a diester of polyether polyol, e.g., PTMEA, to the corresponding dihydroxy product, e.g., polytetramethylene ether glycol (PTMEG) continuously in a reaction zone, such as, for example, a reactive distillation system, for achieving virtually complete conversion of PTMEA to PTMEG, and recovery of PTMEG free of unreacted or unconverted PTMEA and alkanol ester by-product. | 12-25-2014 |
20150025279 | PROCESS FOR PRODUCING DODECANE-1,12-DIOL BY REDUCTION OF LAURYL LACTONE PRODUCED FROM THE OXIDATION OF CYCLODODECANONE - A process for synthesizing dodecane-1,12-diol, and by-products thereof, by the reduction of lauryl lactone produced from the oxidation of cyclododecanone. | 01-22-2015 |
Patent application number | Description | Published |
20080242174 | WASH RESISTANT SYNTHETIC POLYMER COMPOSITIONS CONTAINING ACTIVE COMPOUNDS - A synthetic polymer composition comprising a blend of a synthetic thermoplastic polymer and a polymer containing a polyether chain as a constituent, wherein the article manufactured from the blend contains an active compound is disclosed. Yarns may be formed from the synthetic polymer blend and then knitted or woven into articles, such as net or fabric. The articles may be treated with active compounds such as a perfume, fabric softener, sunscreen agent, antibacterial agent, pesticide, insecticide and such other compounds that provide functionality on the article. The treated articles of the invention retain more than an effective amount of active compounds even after numerous washings. | 10-02-2008 |
20110207959 | HYDROGENATION AND ESTERIFICATION TO FORM DIESTERS - A process is disclosed which employs hydrogenation and esterification to form alkyl diesters. The process subjects an unrefined or otherwise not purified composition comprising maleic anhydride production residue to the processes of hydrogenation and esterification and forming diesters at high conversion efficiency. | 08-25-2011 |
20130042659 | ALIPHATIC POLYESTER POLYOLS FROM CYCLOHEXANE OXIDATION BYPRODUCT STREAMS AS PRECURSORS FOR POLYURETHANE AND POLYISOCYANURATE POLYMERS - The invention provides polyester polyol compositions and resin blends, useful as components of polyurethane and polyisocyanurate polymers, produced from cyclohexane oxidation reaction byproducts, such as water extracts and non-volatile distillation residues from the reaction. Such byproducts of industrial processes for preparation of adipic acid and caprolactam, important intermediates in the production of various types of nylon, have hitherto largely been used only as fuels. The present invention provides value-added products, methods for making, and methods for using the byproduct-derived polyester polyol compositions. For example, the invention provides polyurethane (PU) and/or polyisocyanurate (PIR) polymers made using the polyol compositions and polyfunctional isocyanates. The PU and PIR polymers can be used as adhesives, binders (e.g., for wood fibers), coatings (e.g., for controlled release fertilizers), and foams. | 02-21-2013 |
20130046116 | INTEGRATED COPOLYETHER GLYCOL MANUFACTURING PROCESS - The present invention relates to an improved, fully-integrated continuous process of enhanced process operability for manufacturing copolyether glycols having enhanced physical properties by polymerization of a reaction mixture comprising tetrahydrofuran and at least one alkylene oxide in the presence of an acid catalyst and at least one compound containing reactive hydrogen atoms. The copolyether glycols manufactured by the present process have enhanced physical properties of increased alkylene oxide incorporation, average molecular weight and polydispersity, as well as reduced crystallinity, color, oligomeric cyclic ether content, and linear oligomer having an average molecular weight of up to about 400 dalton content. | 02-21-2013 |
20130053583 | DEPOLYMERIZATION OF OLIGOMERIC CYCLIC ETHERS - The present invention provides a method for depolymerization of a mixture comprising oligomeric cyclic ethers resulting from copolymerization of at least one tetrahydrofuran and at least one other cyclic ether to recover tetrahydrofuran monomer. | 02-28-2013 |
20130197456 | Oil Resistant Polymer Device, Method and Kit for Treating Fungal Infected Nail - A device for treating at least one infected nail of at least one digit of a subject includes an enclosure sized for housing at least a distal end of at least one digit of a subject having at least one infected nail. The enclosure comprises an integrally molded elastomeric polymer sheath having an interior cavity, which substantially conforms to the size and shape of at least the distal end of the at least one digit of the subject having the at least one infected nail. The sheath has an open end and a closed end, tapering from the closed end to the open end. The elastomeric polymer sheath comprises an elastomeric polymer film having oil resistance and low oxygen permeability. A method of using the device to treat the infected nail is provided. A kit including the device and an antifungal treatment composition is disclosed for treating the infected nail. | 08-01-2013 |