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| Number | Title | Issue Date |
| 7365125 | Polycarbonate compositions, articles, and method of manufacture A thermoplastic composition, comprising: about 10 to about 84 wt. % of a polycarbonate resin; about 0.5 to about 40 wt. % of a polycarbonate-polysiloxane copolymer; 1 to about 40 wt. % of an impact modifier composition; and about 1 to about 50 wt. % of an alkyl (met... | 04/29/2008 |
| 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 |
| 7314658 | Storage medium for data This disclosure relates to a data storage medium, and in particular to a data storage medium comprising at least one high modulus layer. In one embodiment, an asymmetric optical storage medium can comprise: a substrate layer comprising polyarylene ether, a high modu... | 01/01/2008 |
| 7312257 | Polymer encapsulation of high aspect ratio materials and methods of making same Embodiments of this invention comprise a pigment comprising one or more substantially spherical-shaped beads, wherein each substantially spherical-shaped bead comprises one or more high aspect ratio particles encapsulated within an encapsulating material. Embodiment... | 12/25/2007 |
| 7309518 | Radial tilt reduced media A storage media can comprise: a plastic substrate, an optical layer, a reflective layer disposed between the optical layer and the substrate, and an adhesive layer disposed between the optical layer and the reflective layer. The optical layer can have an optical lay... | 12/18/2007 |
| 7244804 | Polycarbonate copolymer, resin composition, and molded article There are provided a polycarbonate copolymer (A) which has excellent light resistance and heat resistance and comprises an aromatic dihydroxy component comprising 5 to 95 mol % of fluorene-skeleton-containing dihydroxy compound (1) having a specific structure and 95... | 07/17/2007 |
| 7223804 | Polycarbonate composition A thermoplastic composition comprises polycarbonate, an impact modifier having a pH of about 3 to about 7, and a flame retardant essentially free of bromine and chlorine. ... | 05/29/2007 |
| 7202292 | Colored polymeric resin composition with 1,8-diaminoanthraquinone derivative, article made therefrom, and method for making the same In one embodiment, a colored polymeric resin composition, comprises: a polymeric resin; and a 1,8-diaminoanthraquinone derivative having a purity of greater than or equal to about 90 wt % and having a Formula (VIII): | 04/10/2007 |
| 7175086 | Authentication system, data device, and methods for using the same An authentication system may comprise: a first light source, a second light source, and at least three optically filtered light sensing devices. The first light source can have a first light source spectral distribution and can be capable of providing sufficient exc... | 02/13/2007 |
| 7166687 | Translucent thermoplastic composition, method for making the composition and articles molded there from A thermoplastic composition comprising a matrix of a polycarbonate polymer in which are embedded polysiloxane domains with an average domain size between 20 and 45 nanometers. Said compositions can be obtained by combining a first polycarbonate/poly(diorganosiloxane... | 01/23/2007 |
| 7087282 | Limited play optical storage medium, method for making the same In one embodiment, a limited play optical storage medium for data comprises: a reflective layer, a control portion comprising an optically transparent polymeric resin and a light absorbing material, wherein the control portion has a light transmission of greater tha... | 08/08/2006 |
| 7041773 | Polyimide sulfones, method and articles made therefrom Polyimide sulfone resins are provided with a glass transition temperature of from 200–350° C., residual volatile species concentration of less than 500 ppm and a total reactive end group concentration of less than about 120 milliequivalents/kilogram resin. The re... | 05/09/2006 |
| 7029742 | Storage medium for data This disclosure relates to a data storage medium, and in particular to a data storage medium comprising at least one high modulus layer. An asymmetric optical storage medium can comprise: at least one substrate layer comprising polyarylene ether, at least one high m... | 04/18/2006 |
| 6576739 | Method of polycarbonate preparation High molecular weight polycarbonates are prepared from hindered bisphenols in a reaction sequence involving conversion of the hindered bisphenol to the corresponding bischloroformate and subsequent treatment with an amine catalyst and aqueous base to effe... | 06/10/2003 |
| 6562937 | Continuous preparation of polycarbonate In a continuous flow reactor one or more bisphenols is converted by the action of phosgene and aqueous base into a mixture of mono- and bisphenol chloroformates which are then treated with a catalyst, additional aqueous caustic and a monophenol to afford ... | 05/13/2003 |
| 6140456 | Chemicals and processes for making fluorinated poly(para-xylylenes) New starting materials and chemical processes will be used to make fluorinated poly(para-xylylenes) (F-PPX) and fluorinated poly(para-fluoroxylylenes) (F-PPFX). The processes will use some very low cost and readily available starting materials, catalysts,... | 10/31/2000 |
| 6117968 | Interfacial method for preparing copolyestercarbonates The level of anhydride linkages in copolyestercarbonates is decreased by preparing the copolyestercarbonate interfacially in a two-step method from at least one dihydroxyaromatic compound and at least one dicarboxylic acid. The first step is conducted at ... | 09/12/2000 |
| 6106918 | Optical quality polycarbonates Bischloroformate oligomer compositions are prepared by passing phosgene into a heterogeneous aqueous-organic mixture containing at least one dihydroxyaromatic compound, with simultaneous introduction of a base at a rate to maintain a specific pH range and... | 08/22/2000 |
| 6015631 | Luminescent compound for an electroluminescence display device An organic polymer compound is synthesized by introducing an electron donor and an electron acceptor into a main polymer chain through chemical bonds in the mixing system at a molecular level. An electroluminescence display device (ELD) which has low driv... | 01/18/2000 |
| 5883218 | Optically active spirobiindane polymers Optically active polycarbonate, polyester, and polyurethane polymers prepared from monomers containing optically pure spirobiindane moieties are disclosed. The chiral spirobiindane polymers are of high molecular weight and exhibit high optical rotations. ... | 03/16/1999 |
| 5807965 | Interfacial copolyestercarbonate method using catalyst comprising hexaalkylguanidinium salt and tertiary amine The level of anhydride linkages in copolyestercarbonates is decreased by preparing the copolyestercarbonate interfacially in a two-step method from at least one dihydroxyaromatic compound and at least one dicarboxylic acid. The first step is conducted at ... | 09/15/1998 |
| 5783653 | Digital video substrate A digital video disc substrate comprising a polycarbonate is herein disclosed in which a main chain has a structure represented by the general formula (I) ##STR1## and at least 25 mol % of this terminal group is represented by the formula (III) ... | 07/21/1998 |
| 5761809 | Process for substituting haloalkylated polymers with unsaturated ester, ether, and alkylcarboxymethylene groups Disclosed is a process which comprises reacting a haloalkylated aromatic polymer with a material selected from the group consisting of unsaturated ester salts, alkoxide salts, alkylcarboxylate salts, and mixtures thereof, thereby forming a curable polymer... | 06/09/1998 |
| 5710238 | Process for preparing branched polycarbonates by solid state polymerization This invention involves a novel process for preparing branched polycarbonates employing a solid state polycondensation process; specifically, subjecting a linear crystallized oligomer derived from dihydroxydiaryl compound and a diaryl carbonate to solid s... | 01/20/1998 |
| 5696222 | Process for the production of polycarbonate A process for the production of a terminal-blocked aromatic polycarbonate by melt-polycondensing an aromatic dihydroxy compound and diphenylcarbonate, the process comprising adding a specific carbonate or carboxylic ester after a polycarbonate formed has ... | 12/09/1997 |
| 5670603 | Polymers exhibiting nonlinear optical properties This invention relates to polymers having non-linear optical properties which polymers include fluorene moieties having at least one electron accepting group and at least one electon donating group substituted to different phenyl rings of the fluorene moi... | 09/23/1997 |
| 5621065 | Polycarbonate diols, their preparation and use as starting products for polyurethane plastics This invention relates to novel polycarbonates having hydroxyl end groups and an average molecular weight of 500 to 12,000, as determined by measuring the OH number, and being based on dimer diols containing either 36 or 44 carbon atoms. These novel polyc... | 04/15/1997 |
| 5612163 | Transfer sheet of polycarbonate-based resin A transfer sheet for printing media of electrophotographic copying machines or printers comprises a polycarbonate-based resin or a composition containing not less than 75% by mass of a polycarbonate-based resin, and having characteristics that: the ratio ... | 03/18/1997 |
| 5606007 | Processes for preparing aromatic polycarbonates According to the present invention, there is provided an improvement which comprises adding an acid compound and if necessary an epoxy compound to a reaction product resulting from melt polycondensation reaction of an aromatic dihydroxy compound with a ca... | 02/25/1997 |
| 5604063 | Composition for charge transport layer and electrophotographic member using same An electrophotographic member which can give printed images of high quality and is markedly high in photoresponsiveness can be provided without using halogen solvents by using a composition for charge transport layer which contains a polycarbonate resin h... | 02/18/1997 |
| 5599897 | Aromatic polycarbonate, a method for producing the same, and a plastic optical waveguide using the same There is provided an aromatic polycarbonate obtained by reacting a carbonate precursor substance with a dihydric phenol comprising mainly 2,2-bis(4-hydroxyphenol)-1,1,1,3,3,3-hexafluoropropane having specific characteristics. This aromatic polycarbonate h... | 02/04/1997 |
| 5556904 | Aromatic polycarbonate copolymer, a process for producing the same, and a plastic optical waveguide using the same There is provided an aromatic polycarbonate copolymer obtained by reacting a dihydric phenol component comprising mainly 2,2-bis(4-hydroxyphenyl)-1,1,1,3,3,3-hexafluoropropane and 9,9-bis(4-hydroxyphenyl)fluorene or 1,1-bis(4-hydroxyphenyl)-1-phenyle... | 09/17/1996 |
| 5550205 | Copolycarbonates and manufacturing method for them To provide novel polycarbonates and a manufacturing method for them. Copolycarbonates obtained by copolymerizing at least two aromatic dihydroxy compounds and a compound capable of introducing carbonate links. Preferably, they contain, as the components derive... | 08/27/1996 |
| 5545710 | Use of special polycarbonates for the production of optical articles The present invention provides the use of polycarbonates containing carbonate structural units of the formula (I), ##STR1## for the production of optical articles, novel polycarbonates, which contain the structural units (I), together with a process ... | 08/13/1996 |
| 5532331 | Thiodiphenol copolycarbonates and their use as components of multilayered polymeric reflective bodies This invention provides novel copolycarbonates that exhibit improvements in glass transition temperature, refractive index, and limiting oxygen index compared to prior art thiodiphenol/bisphenol A copolycarbonates. The copolycarbonates of this invention c... | 07/02/1996 |
| 5521041 | Polycarbonate, method of preparing the same and electrophotographic photoreceptor produced by using the same A polycarbonate and a method of preparing the polycarbonate which comprises a repeating unit represented by the following general formula ##STR1## wherein each of R1 and R2 respectively is a halogen atom, an alkyl group, a cyclo... | 05/28/1996 |
| 5519105 | Method for making polycarbonates A composition and method is provided for making polycarbonate utilizing an effective amount of a binary catalyst system, comprising a phase transfer catalyst and a tertiary organic amine, as a condensation catalyst during the interfacial phosgenation of a... | 05/21/1996 |
| 5496913 | Aromatic polycarbonate, a method for producing the same, and a plastic optical waveguide using the same There is provided an aromatic polycarbonate obtained by reacting a carbonate precursor substance with a dihydric phenol comprising mainly 2,2-bis(4-hydroxyphenol)-1,1,1,3,3,3-hexafluoropropane having specific characteristics. This aromatic polycarbonate h... | 03/05/1996 |
| 5470939 | Polycarbonate copolymer A polycarbonate copolymer having a desirable heat resistance and impact resistance, which comprises a carbonate structural unit of the formula (I): ##STR1## wherein A is alkylidene, alkylene, arylene, arylalkylene, --O--, --S--, --SO2... | 11/28/1995 |
| 5464923 | Polymer compositions containing substituted biphenyl pyrazines The present invention provides novel substituted biphenyl pyrazines or pyrazine derivatives ("BPD") which are functional and have useful application as a monomer for a variety of high performance polymers such as polyester, polyarylate, polycarbonate, pol... | 11/07/1995 |
