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| Number | Title | Issue Date |
| 8106143 | Polycarbonate resin composition A resin composition includes a polycarbonate resin derived from an ether diol residue such as isosorbide and has excellent impact resistance, heat resistance, heat stability and moldability. The resin composition includes a rubber polymer (component B) in an amount ... | 01/31/2012 |
| 8044167 | Process for production of high-purity diaryl carbonate An aromatic polycarbonate that is obtained by transesterification between a high-purity diphenyl carbonate and an aromatic dihydroxy compound. A specific industrially useful process for the production of a high-purity diaryl carbonate in which a diaryl carbonate hav... | 10/25/2011 |
| 7858728 | Polycarbonate resins method of manufacture, and articles formed therefrom Disclosed herein is a polycarbonate comprising a terminal olefin group of the formula wherein R1 is a C1-C40 hydrocarbon that can be unsubstituted or substituted with a halogen, olefin, ethe... | 12/28/2010 |
| 7790834 | Copolymers comprising trimethylene carbonate and poly(trimethylene ether) glycols The present invention relates to novel copolymers comprising unsubstituted or R-substituted trimethylene carbonate and poly(trimethylene ether)glycol. The copolymers find use in areas including personal care, coatings and lubricants. ... | 09/07/2010 |
| 7776992 | Polychloroprene latex composition and process for producing the same A polychloroprene latex composition which has a low viscosity and which can be made to have a high solid content, obtained by emulsion polymerization of chloroprene alone or chloroprene and a monomer copolymerizable with chloroprene in the presence of a polyvinyl al... | 08/17/2010 |
| 7705107 | Process for the preparation of polycarbonates An improvement to the phase interface process of preparing aromatic polycarbonate is disclosed. The process is characterized in that the phosgenation is carried out at 0 to 40° C., and in that the temperature of the reaction mixture at the time of addition of the c... | 04/27/2010 |
| 7645851 | Polycarbonate with reduced color A method of making polycarbonate includes the steps of forming polycarbonate by a melt transesterification method using an activated diaryl carbonate, and compounding the polycarbonate with a phosphorus-containing compound that has an abstractable proton or hydrolyz... | 01/12/2010 |
| 7528214 | Methods for preparing transparent articles from hydroquinone polycarbonate copolymers A method for producing a transparent article comprises the steps of melt transesterifying a monomer mixture in the presence of a transesterification catalyst to produce a hydroquinone polycarbonate copolymer product comprising greater than 45 mole percent of structu... | 05/05/2009 |
| RE40697 | Method for making an aromatic polycarbonate This invention relates to an extrusion method preparing polycarbonates from a solution of an oligomeric polycarbonate. A mixture of bis(methyl salicyl)carbonate (BMSC), BPA and a transesterification catalyst are first equilibrated at moderate temperatures to provide... | 04/07/2009 |
| 7495065 | Method of preparing polycarbonate resin A method of preparing a polycarbonate resin having improved thermal stability is provided. The method includes: mixing polycarbonate having hydroxy terminal groups and a end terminator, a compound of formula (1) (refer to the detailed description section) at normal ... | 02/24/2009 |
| 7425603 | Polymers, polymer compositions, and method of preparation A polymer comprising structural units derived from a polycyclic dihydroxy compound of Formula (I) wherein R1, R2 and R3 are independently at each occurrence selected from the group consistin... | 09/16/2008 |
| RE40508 | Thermally stable polymers, method of preparation, and articles made therefrom Thermally stable polymers comprising resorcinol arylate chain members are prepared using an interfacial method comprising the steps of: (a) combining at least one resorcinol moiety and at least one catalyst in a mixture of water and at least one organic solvent subs... | 09/16/2008 |
| 7405265 | Method of preparing catalyst for polymerization of aliphatic polycarbonate and method of polymerizing aliphatic polycarbonate Disclosed is a method of preparing a catalyst for polymerization of aliphatic polycarbonates and a method of polymerizing an aliphatic polycarbonate. This method includes reacting a zinc precursor and organic dicarboxylic acid in a non-ionic surfactant-included solu... | 07/29/2008 |
| 7402650 | Process for preparing polyarylate having high thermo-resistance and high transparency A process for preparing polyarylate wherein a bivalent phenol compound having the structure of Formula 1 and an aromatic dicarboxylic acid halogen compound react to prepare a polyarylate, and wherein a nonionic surface-active agent is added. This decreases residual ... | 07/22/2008 |
| 7399820 | Cyclic oligoformals in polycarbonate A thermoplastic molding composition comprising (co)poly(ester)carbonate, and a cyclic oligoformal is disclosed. The composition that is characterized in its lowered water absorption and improved flowability is suitable for a variety of application including in parti... | 07/15/2008 |
| 7390868 | Catalyst for polycarbonate production and process for producing polycarbonate Provided are a catalyst for producing polycarbonate comprising a reaction product obtained by reacting (a) a catalyst carrier containing nitrogen or phosphorus with (b) a palladium compound and (c) a metal compound having a redox catalytic ability and a production p... | 06/24/2008 |
| 7375166 | Polymeric blends for optical devices and method of manufacture thereof A method for manufacturing a film or sheet comprises deforming a polymeric alloy at a temperature effective to impart to the deformed alloy a birefringence retardation of greater than or equal to about 750 nanometers. A method eliminating comets and veins in an opti... | 05/20/2008 |
| 7375177 | Polymers, polymer compositions and method of preparation A polymer comprising at least one structural unit derived from a dihydroxy compound of Formula (I) wherein R1 is an aromatic divalent functionality having 6 to 60 carbons, R2 can be the same or differe... | 05/20/2008 |
| 7368161 | Color stable pigmented polymeric films Color-stable, pigmented optical bodies comprising a single or multiple layer core having at least one layer of a thermoplastic polymer material. The thermoplastic polymer material has dispersed within it a particulate pigment. The optical bodies generally possess hi... | 05/06/2008 |
| 7368521 | Method of producing modified polycarbonate using spray-crystallizing method Provided is a method of producing a high-molecular weight modified polycarbonate resin. The method includes a melt condensation polymerization process in which transesterification and quick condensation polymerization are sequentially performed, a spray crystallizat... | 05/06/2008 |
| 7365148 | Polycarbonate and process for producing the same A polycarbonate containing an ether diol residue producible from a polysaccharide and expressed by the following formula (1), and a diol residue expressed by the following formula (2) —O—(CmH2m... | 04/29/2008 |
| 7365149 | Equipment cleaning in the manufacture of polycarbonates A surface of a melt polymerization reactor system having residual reaction components of a melt polymerization reaction thereon can be cleaned by introducing a cleaning agent having a phenolic compound to the polymerization reactor system and into contact with the s... | 04/29/2008 |
| 7361724 | Self assembling monolayer compositions A surface coating composition for providing a self-assembling monolayer, in stable form, on a material surface or at a suitable interface, as well as a method of preparing such a composition and a method of using such a composition to coat a surface, such as the sur... | 04/22/2008 |
| 7358321 | High glass transition temperature copolycarbonates, methods of manufacture, and uses thereof A copolycarbonate is discloses, comprising units of the formula (1) wherein 70 to 99.5 mole percent of the total number of R1 groups are derived from a dihydroxy compound of formula (2) | 04/15/2008 |
| 7354986 | High glass transition temperature copolycarbonates, methods of manufacture, and uses thereof A copolycarbonate of the formula wherein 5 to 75 mole percent of the total number of R1 groups is derived from a high Tg monomer of formula (2) wherein R2 an... | 04/08/2008 |
| 7348394 | Methods for preparing transparent articles from biphenol polycarbonate copolymers A method for producing a transparent article is provided. The method comprises melt transesterifying in the presence of a transesterification catalyst and a monomer mixture to produce a biphenol polycarbonate copolymer product comprising greater than 45 mole percent... | 03/25/2008 |
| 7345133 | Branched polycarbonates A branched polycarbonate and processes for its preparation are disclosed. The polycarbonate contains structural units conforming to in which R1, R2, R3 and R4 mutually independent... | 03/18/2008 |
| 7339021 | Method for preparing polycarbonate resin The present invention relates to a method for preparing polycarbonate resin, and more particularly to a method for effectively preparing polycarbonate resin having a large molecular weight in a short time under a melt polymerization condition using a catalyst system... | 03/04/2008 |
| 7334681 | Packaging system with oxygen sensor for gas inflation/evacuation system and sealing system A storable gas inflation/evacuation system and sealing system. The systems are removably connectible to a proximal portion of a guidewire assembly which has an occlusive balloon at a distal portion. The invention includes provision for indicating the presence of oxy... | 02/26/2008 |
| 7332559 | Method of preparing polycarbonate resin A method of preparing a high molecular weight polycarbonate resin is provided. In the method, a condensation polymerization process is used so that a mole fraction of arylcarbonate existing in a terminated group of a reaction side product having a degree of polymeri... | 02/19/2008 |
| 7332560 | Thermoplastic molding compositions having reduced water absorption A thermoplastic molding composition comprising polycarbonate and at least one (co)polyformal is disclosed. Characterized by its low water absorption the composition is particularly suitable for producing molded articles, especially optical data carriers, such as com... | 02/19/2008 |
| 7329718 | Aromatic polycarbonate resin, process for producing the same, optical-part molding material, and optical part The present invention relates to an aromatic polycarbonate resin which comprises repetitive units originating in residual groups of a 2,2-bis(4-hydroxyphenyl)adamantane compound and a 1,3-bis(4-hydroxyphenyl)adamantane compound having a substituent on an aromatic ri... | 02/12/2008 |
| 7326763 | Polymers, polymer compositions and method of preparation A polymer comprises structural units derived from a polycyclic dihydroxy compound of Formula (I) wherein R1 is selected from the group consisting of a cyano functionality, a ni... | 02/05/2008 |
| 7326467 | Polycarbonate-based resin composition for extrusion molding using sizing die and molded product A polycarbonate-based resin composition for extrusion molding using a siring die, and a molded product produced by extrusion-molding the resin composition using a sizing die, The polycarbonate-based resin composition comprises, as a main component, a polycarbonate h... | 02/05/2008 |
| 7326764 | Transparent compositions, methods for the preparation thereof, and articles derived therefrom A reaction product comprises a first polyester-polycarbonate comprising a polyester unit and a polycarbonate unit, a second polyester-polycarbonate comprising a polyester unit and a polycarbonate unit, and a transesterification catalyst. The reaction product has a h... | 02/05/2008 |
| 7323535 | Transparent compositions, methods for the preparation thereof, and articles derived therefrom A reaction product comprises a polyester-polycarbonate comprising a polyester unit and a polycarbonate unit, a polycarbonate polymer, and a transesterification catalyst, wherein the polyester-polycarbonate comprises greater than or equal to 75 mole % aromatic ester ... | 01/29/2008 |
| 7323536 | Transparent compositions, methods for the preparation thereof, and articles derived therefrom A reaction product comprises a polyester-polycarbonate comprising a polyester unit and a polycarbonate unit, and a transesterification catalyst. The reaction product has a haze of less than 5.0%, specifically less than 3.5% as measured at a thickness of 3.2 mm accor... | 01/29/2008 |
| 7317073 | Method of producing vacuum in the production of polymers A method is disclosed for producing a vacuum and for separating condensable components present in vapor which accumulates during the production of a polymer by melt-phase polycondensation under vacuum. Vapor produced during the production of polymers by melt-phase p... | 01/08/2008 |
| 7317067 | Polycarbonate copolymer, and heat resistant parts comprising the same An object of the present invention is to provide a polycarbonate copolymer having excellent heat resistance and dimensional stability and heat resistant parts comprising the copolymer and suitable for use in various applications. The present invention is a polycarbo... | 01/08/2008 |
| 7309756 | Methods for converting linear polyesters to macrocyclic oligoester compositions and macrocyclic oligoesters Macrocyclic oligoesters and compositions comprising macrocyclic oligoesters are prepared from intermediate molecular weight polyesters. In one embodiment, a diol is contacted with a dicarboxylic acid or a dicarboxylate in the presence of a catalyst to produce a comp... | 12/18/2007 |
