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| Number | Title | Issue Date |
| 8106145 | High IV melt phase polyester polymer catalyzed with antimony containing compounds A melt phase process for making a polyester polymer melt phase product by adding an antimony containing catalyst to the melt phase, polycondensing the melt containing said catalyst in the melt phase until the It.V. of the melt reaches at least 0.75 dL/g. Polyester p... | 01/31/2012 |
| 8013106 | Optical lens An optical lens which can be produced by injection molding on an industrial scale, and which has a high refractive index, a low Abbe's number, a low birefringence index, a high transparency and a high glass transition temperature. The optical lens can be produced by... | 09/06/2011 |
| 7968671 | Alkylphenol-terminated copolycarbonates, processes for preparing the same, molding compositions containing the same, and articles prepared therefrom Copolycarbonates comprising alkylphenolchain terminator groups for adjusting the molecular weight, compositions of these copolycarbonates with additives chosen from the group of heat stabilizers and mold release agents, the use thereof for the production of moldings... | 06/28/2011 |
| 7902318 | High IV melt phase polyester polymer catalyzed with antimony containing compounds A melt phase process for making a polyester polymer melt phase product by adding an antimony containing catalyst to the melt phase, polycondensing the melt containing said catalyst in the melt phase until the It.V. of the melt reaches at least 0.75 dL/g. Polyester p... | 03/08/2011 |
| 7425358 | Copolycarbonates having improved flowability An optical data storage comprising a thermoplastic copolycarbonate is disclosed. The copolycarbonate contains at least one unit derived from dihydroxydiphenyl ether and at least one unit derived from at least one member selected from the group consisting of 4,4′di... | 09/16/2008 |
| 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 |
| 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 |
| 7271235 | Branched aromatic polycarbonate and its production method It is to provide a branched aromatic polycarbonate excellent in hue and excellent in melt properties such as melt strength. A branched aromatic polycarbonate obtained by transesterification and having a viscosity average molecular weight of at least 16,000, w... | 09/18/2007 |
| 7253223 | Polycarbonate resin composition and molded object thereof A polycarbonate resin composition which has excellent flame retardancy, even when containing neither any phosphorus compound flame retardant nor any halogenated flame retardant, and which is highly reflective and has light-shutting properties and excellent thermal s... | 08/07/2007 |
| 7211641 | Liquid crystal polycarbonates and methods of preparing same Liquid crystal polycarbonates are made by forming a reaction mixture containing (a) an activated diaryl carbonate; (b) at least two species of aromatic diols selected from among resorcinol, 4,4′-biphenol, hydroquinone, methylhydroquinone, 4,4′-dihydroxyphenyleth... | 05/01/2007 |
| 7198830 | Polycarbonate resin composition and polarizing sheet used the same A polycarbonate resin composition obtained by blending a polycarbonate resin (A) obtained by forming a carbonate bond from 95 to 5 mol % of a dihydroxy compound having a fluorene structure represented by the general formula (1) and 5 to 95 mol % of a dihydroxy compo... | 04/03/2007 |
| 7138479 | Aliphatic diol polycarbonates and their preparation The disclosure provides high quality, low yellowness index copolycarbonates comprising structural units derived from at least one aliphatic diol, at least an aromatic dihydroxy compound and a diaryl carbonate. Also disclosed herein is a method of making such copolyc... | 11/21/2006 |
| 7132294 | Functionalized small molecules for use in chemical sensors The invention provides a device for selective molecular recognition, the device comprising a sensing portion, wherein said sensing portion includes a substrate having coated thereon a layer comprising a non-volatile, small molecule compound having at least two penda... | 11/07/2006 |
| 7060778 | Ytterbium(III) acetylacetonate as a catalyst for the preparation of aliphatic oligocarbonate polyols Ytterbium(III) acetylacetonate is used as a catalyst for the preparation of aliphatic oligocarbonate polyols by transesterification of at least one organic carbonate with at least one aliphatic polyol. ... | 06/13/2006 |
| 7057005 | Process for preparing branched polycarbonate The present invention is a process for producing branched polycarbonate providing for optimum utilization of the branching agent. It was surprisingly found that adding at least a portion of the coupling catalyst to the polymerization at a point during the oligomeriz... | 06/06/2006 |
| 7057004 | Process for the production of copolycarbonates with reduced color A method is provided for reducing the color generated during production of copolycarbonate that includes quinone-type residues. The method includes the steps preparing a reaction mixture containing precursors of monomer residues, selecting a catalyst introduction st... | 06/06/2006 |
| 7034099 | Process for the production of copolycarbonates with reduced color A method is provided for reducing the color generated during production of copolycarbonate that includes quinone-type residues. The method includes the steps of mixing the precursors of monomer residues, a carbonate source and a polymerization catalyst into a reacti... | 04/25/2006 |
| 6987141 | Polycarbonate resin composition The invention relates to a polycarbonate resin composition, including (1) a colored composition that comprises two types of specifically-terminated aromatic polycarbonates along with an inorganic filler added thereto, (2) a composition that comprises a polycarbonate... | 01/17/2006 |
| 6780956 | Method of making silicone copolycarbonates having random and blocky substructures The invention relates to a method of preparing silicone copolycarbonates which incorporate both blocky and random substructures. Such silicone-containing copolycarbonates are useful in the preparation of a variety of molded articles such as optical disks. The struct... | 08/24/2004 |
| 6740714 | Polycarbonate blends A thermoplastic molding composition suitable for making articles having good combination of properties is disclosed. The composition contains (A) a copolycarbonate derived from compounds of formula (I) wherein R | 05/25/2004 |
| 6740728 | Methods for the preparation of polyesters, poly(ester amide)s and poly(ester imide)s and uses of the materials obtained therefrom The present invention relates to methods for the preparation of polyesters, poly(ester amide)s and poly(ester imide)s. The materials obtained by the methods of present invention are useful as fluid separation membranes and as high performance materials. ... | 05/25/2004 |
| 6716955 | Poly(arylene ether) polymer with low temperature crosslinking grafts and adhesive comprising the same A poly(arylene ether) polymer includes polymer repeat units of the following structure: —(O—Ar1—O—Ar2—)m—(O—Ar3—O—Ar4—)n— where Ar1, Ar... | 04/06/2004 |
| 6689863 | Polycarbonate copolymers and methods for producing the polycarbonate copolymers A polycarbonate copolymer comprising structural units derived from a cyclohexylidene bis(alkylphenol) of the formula: ##STR1## wherein A1 is a trisubstituted aromatic radical having the formula C6 H3 R2, wherein... | 02/10/2004 |
| 6630525 | Polycarbonate-siloxane copolymers A polycarbonate is provided which contains residues of a dihydric phenol, at least one comonomer of a siloxane functional bisphenol, optionally, a branching agent and optionally, a flame retardant. Further embodiments of the present invention includes a m... | 10/07/2003 |
| 6613869 | Containers made of a branched polycarbonate A branched polycarbonate resin suitable for making containers is disclosed. The polycarbonate is characterized in that at 260° C. and shear rate of 10 s-1 it has a melt viscosity of 5500 to 900 Pas, and in that at 260° C. and shear rate of 10... | 09/02/2003 |
| 6596839 | Wholly aromatic polyester and production process therefor A process for producing a wholly aromatic polyester which is excellent in heat resistance, mechanical properties and yet color and has a high degree of polymerization by melt polymerizing a dicarboxylic acid and a diol directly on an industrial scale at a... | 07/22/2003 |
| 6576735 | Polycarbonate resin A polycarbonate resin obtainable by reaction of a carbonic acid ester-forming compound with bisphenols consisting essentially of 9,9-bis(4-hydroxy-3-methylphenyl) fluorene and a bisphenol compound(s) having a polysiloxane skeleton, an intrinsic viscosity ... | 06/10/2003 |
| 6566458 | Polysulfone/polysiloxane polycarbonate block copolymers A block copolymer comprises structural units of the formula (I): ##STR1## wherein R1 comprises polysulfone groups and structural units of the formula (II): ##STR2## wherein R2 comprises polysiloxane groups.... | 05/20/2003 |
| 6492481 | Substantially single phase silicone copolycarbonates, methods, and optical articles made therefrom The invention relates to substantially single phase silicone copolycarbonates suitable for use in optical articles such as digital versatile disks. The silicone copolycarbonates contain residues of silicone containing and nonsilicone containing bisphenols... | 12/10/2002 |
| 6462146 | Polycarbonate blends and method of making same Copolymers of BPA and menthane bisphenols such as BPT1 and BPT2 can be used as a compatabilizer to allow the formation of homogeneous blends of BPA with menthane bisphenol polycarbonates such as poly-BPT1 or poly-BPT2 or copolymers thereof. Thus, a compat... | 10/08/2002 |
| 6316071 | Substrate for digital versatile disk and process for producing the same A digital versatile disk (DVD) excellent in transferability on injection molding, and excellent in releasability from a mold and in strength is provided. The substrate of the digital versatile disk (DVD) comprises an aromatic polycarbonate resin compositi... | 11/13/2001 |
| 6291125 | Terpolymer imaging member and imaging process A terpolymer represented by formula ##STR1## is useful in particular in electrophotographic imaging members.... | 09/18/2001 |
| 6042920 | Optical quality copolycarbonates containing polyoxyalkylene carbonate units Copolycarbonates comprise structural units derived from a bisphenol such as bisphenol A, a spiro(bis)indane bisphenol such as 6,6'-dihdyroxy-3,3,3',3'-tetramethyl-1,1'-spiro(bis)indane and a polyoxyalkylene glycol such as polyethylene glycol. These copoly... | 03/28/2000 |
| 5993971 | Optical information record medium There is disclosed an optical information record medium having an optical information record layer on a transparent substrate, in which the transparent substrate is made of a resin material mainly consisting of a polycarbonate resin that contains no more ... | 11/30/1999 |
| 5886073 | Polycarbonate redistribution method with catalyst decomposition Redistribution of polycarbonate compositions is effected in the presence of a tetraorganophosphonium hydroxide as catalyst and a catalyst decomposing amount of a polyhydroxyaliphatic compound such as glyceryl monostearate, pentaerythritol or ethylene glyc... | 03/23/1999 |
| 5876851 | Film from polycarbonate, polyester to be laminated on metal A film to be laminated on a metal, which is formed of a polycarbonate resin having a high concentration of terminal hydroxyl groups or a composition comprising said resin and a polyester resin or a film to be laminated on a metal, which is formed by lamin... | 03/02/1999 |
| 5863992 | Tetraphenols and their use as polycarbonate branching agents Branched polycarbonates having properties suitable for blow molding are prepared by equilibrating a linear or branched aromatic polycarbonate with certain tetraphenols, especially 2,2,5,5-tetrakis (4-hydroxyphenyl)hexane and 1,1-bis(p-hydroxyphenyl)ethy... | 01/26/1999 |
| 5858499 | Polycarbonate copolymer containing oxaspiroundecane group and production process therefor A polycarbonate copolymer which consists essentially of 5 to 95 mol % of recurring units containing a specific spiroglycol unit and 95 to 5 mol % of recurring units containing a specific biphenol unit, and has a reduced viscosity (ηsp /c), mea... | 01/12/1999 |
| 5859833 | Optical disk grade copolyestercarbonates derived from hydroxyphenylindanols Copolycarbonates having low intrinsic birefringence comprise structural units derived from hydroxyphenylindanol, from resorcinol, alkylenedioic acid or eugenolsiloxane, and, optionally, from a bisphenol, preferably bisphenol A. The copolycarbonates are us... | 01/12/1999 |
| 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 |
