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6835798 |
Method of producing polycarbonates
A process for the preparation of polycarbonate by the phase boundary process is disclosed. The process entails reacting at least one dihydroxydiarylalkane in the form of its alkali metal salts with...
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6833193 |
Polycarbonate molded bodies with improved optical properties
A polycarbonate molding having improved optical properties is disclosed. The molding features an angle of deflection α ε (min) determined in a accordance with DIN 52305-A-AS of ≦2.0 and a...
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6833427 |
Polycarbonate resin molding material for optical use
A polycarbonate resin molding material for optical use which is pellets formed from a polycarbonate resin and having a bulk density of 0.72 kg/l or more and an optical disk substrate formed...
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6825266 |
Polycarbonate molding compositions and articles with improved surface aesthetics
A thermoplastic polymer molding composition useful for producing an article, where the molding composition comprises a polyorganosiloxane-polycarbonate block copolymer and a flow modifier; wherein...
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6825312 |
Polycarbonates, polyester carbonates and polyesters with special branched terminal groups
A phenolic compound having a branched structure is disclosed. The compound conforms to HO—Ar 1 —X—Ar 2 —[Y—W] n (1) wherein Ar 1 and Ar 2 independently denote an optionally...
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6818736 |
Polymeric material, molded product and methods for their production
Disclosed is a polymeric material obtained by melt-kneading, using a kneading apparatus, a resin composition containing an organic polymer having no metal alkoxy group and a metal alkoxide...
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6815524 |
Polycarbonate substrates
Polycarbonate substrates having low concentration of defects are disclosed. The substrates are suitable for producing molded articles characterized by low cloudiness.
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6812320 |
Method for copolyestercarbonate synthesis
Thermally stable block copolyestercarbonates comprising chain members derived from at least one dihydroxy-substituted aromatic hydrocarbon moiety and at least one aromatic dicarboxylic acid moiety,...
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6811815 |
Method for roll-to-roll deposition of optically transparent and high conductivity metallic thin films
Methods for roll-to-roll deposition of optically transparent and high conductivity metallic thin films are disclosed. In general, a method according to the present invention comprises: (1)...
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6806345 |
Aliphatic polycarbonate homo-and co-polymers produced by DMC catalysis and the process for their production
Aliphatic polycarbonate homo- and co-polymers are obtained by ring-opening homo- or co-polymerization of cyclic carbonates by DMC catalysis. These polymers are useful in the production of...
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6800697 |
Process for producing retardation film
In the present invention, a retardation film is produced by adjusting the mixing ratio of at least two kinds of mutually compatible polymers A and B and by forming the resulting mixture into the...
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6797803 |
Recycle process for polycondensation resins
A method of recycling fusible polycondensation resin waste in a fusion polymerization apparatus is disclosed. The method of recycling polycondensation resins comprises adding polycondensation resin...
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6797384 |
Polycarbonate automotive window panels with coating system blocking UV and IR radiation and providing abrasion resistant surface
An automotive glazing panel is provided by a polycarbonate substrate having a coating system including an inner layer blocking IR and overlying coating material blocking UV radiation and providing...
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6790927 |
Optical polycarbonate and applications thereof
This specification describes an optical polycarbonate composition obtained by the melt polycondensation of a bisphenol and a carbonic diester in the presence of an alkaline compound catalyst,...
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6790928 |
Process for producing polycarbonates
100 parts by weight of the polycarbonate produce by melt polycondensation of a carbonic acid diester and a dihydroxy compound and 0.0001 to 0.1 part by weight of a phosphite compound represented by...
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6787236 |
Hard coat film
Provided is a hard coat film which has an inorganic hard coat layer having excellent scratch resistance and weatherability and inhibited from generation of curling and which is particularly suited...
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6787629 |
Dental resin materials, method of manufacture, and uses thereof
A dental resin composition is disclosed, comprising a polycarbonate-modified diphenoxy diacrylate having a monomer structure (I): wherein R is CH 3 or H; b is one or zero; A is (CH 2 ) n O; n...
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6784278 |
Polycarbonates, polyester carbonates and polyesters having branched terminal groups
The use of phenols having a branched structure as terminal groups in polycarbonates, polyester carbonates and polyesters is disclosed. Also disclosed are polycarbonates, polyester carbonates and...
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6780959 |
Compositions comprising functionalized polyphenylene ether resins
The invention relates to a polyphenylene ether resin containing residual aliphatic unsaturation as well as composites, blends, and articles made from the polyphenylene ether resin containing...
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6780965 |
Plastic lens
A plastic lens, an optical molded article, a film or a sheet formed of a copolycarbonate resin comprising a structural unit (I) of the following general formula (I), and a structural unit (II)...
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6780961 |
Method of making polycarbonate
A new method of converting oligomeric chloroformates to high molecular weight polycarbonate is presented. By carefully controlling the relative concentrations and amounts of hydroxyl and...
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6777087 |
Near infrared-cutting material and process for production thereof
A near infrared-cutting material produced by forming, on a transparent substrate, a transparent resin film containing at least a near infrared absorbing-dye and a dye having a maximum absorption...
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6774208 |
Friction heat, cryogenic quench solid state polymerization
A two step method for solid state polymerization of dry crystalline thermoplastic polymers to form polymers with superior mechanical properties, first by mechanically fluidizing dry crystalline...
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6770731 |
Polycarbonate having pronounced shear thinning behavior
A branched melt-polymerized polycarbonate having pronounced non-Newtonian flow behavior is disclosed. The polycarbonate is suitable for preparing molding compositions and the preparation of a...
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6767986 |
Production and use of high molecular weight aliphatic polycarbonates
A process for the production of high molecular weight aliphatic polycarbonates is disclosed. The process entails a first stage wherein a low molecular weight aliphatic polycarbonate is prepared and...
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6767955 |
Flowable dental resin materials and method of use thereof
A dental restorative composition comprises about 35 to about 43 wt %, based on the total dental restorative composition, of a polymerizable, ethylenically unsaturated resin composition, wherein the...
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6762277 |
Method of manufacturing N-carboxyamino acid anhydride and polyamino acid
A method of manufacturing a new N-carboxyamino acid anhydride and polyamino acid using a simple process operation. The method for manufacturing N-carboxyamino acid anhydride comprising reacting...
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6759504 |
Method for quenching of polycarbonate and compositions prepared thereby
Polycarbonate produced by melt condensation of a diaryl carbonate and a dihydric phenol in the presence of a basic catalyst to produce an intermediate polycarbonate composition is finished by...
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6753405 |
Preparation of copolycarbonates
A process for the preparation of transparent copolycarbonate is disclosed. The copolycarbonate the molecular structure of which contains more than 35 mole % of units derived from...
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6753403 |
Process and apparatus for producing polycarbonate
A process for producing polycarbonate designed to improve the quality of polycarbonate as a polymerization product polymer and reduce the investment and operating costs is provided. Polycarbonate...
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6753404 |
Continuous process for the preparation of copolycarbonate resins
A continuous process for the preparation of copolycarbonate resins has great advantages in preparing molding materials of intricate structure or of thin-wall: the molding process may be conducted...
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6750313 |
Resin composition and articles molded therefrom
A resin composition having a high refractive index and low dispersion characteristics including a carbonate residue, a phosphonic acid residue and a dihydric phenol residue, wherein the mol...
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6750314 |
Process for producing an aromatic polycarbonate
To produce an aromatic polycarbonate excellent in physical properties and hue by a simplified step as compared with a conventional one. A process for producing an aromatic polycarbonate, which...
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6747118 |
Storage of phosphonium phenolate catalysts and their use as interesterification catalysts
A process for preparing a melt transesterification catalyst is disclosed. The process entails (i) obtaining a phenol adduct of phosphonium phenolatein the form of crystalline solid and (ii) storing...
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6747119 |
Method and system for preparing a polycarbonate, copolymerization reagent and polycarbonate
A method for preparing a polycarbonate comprises preparing a free hydroxyl-containing polycarbonate and reacting the hydroxyl-containing polycarbonate with a mixture of (B) a symmetrical optionally...
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6740730 |
Polycarbonate and molded polycarbonate articles
The invention relates to a novel polycarbonate and its use a material in the production of molded articles and semifinished products, especially for transparent articles such as data memories or...
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6740729 |
Process for producing polycarbonate
A process for preparing polycarbonate is composed of the steps of transesterifying a dialkyl oxalate and a phenolic compound to give a diaryl oxalate; decarbonylating the diaryl oxalate to give a...
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6734277 |
Method of enhancing pit replication in optical disks
Polycarbonate compositions incorporating long chain alkylphenol endgroups, for example cardanol, show enhanced pit replication characteristics when molded into optical disks. The enhancement in...
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6734279 |
Two step production of polycarbonates
Methods of synthesizing high molecular weight polycarbonate polymers are described. Also described are polycarbonates produced by these methods.
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6734278 |
Production of polyester carbonates
The present invention provides a two-stage process for the production of polyester carbonates with aliphatic dicarboxylic acids, the polyester carbonates obtained thereby, a process for the...
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6723824 |
Optical disk substrate and molding material therefor
An optical disk substrate formed of an aromatic polycarbonate resin obtained by a reaction between an aromatic dihydroxy compound and a carbonate diester and in which the content of undissolved...
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6720406 |
High-purity polymer granules and method for the production thereof
A process for producing polymer pellets is disclosed. The process that is particular suitable for making polycarbonate pellets entails extruding a polymer melt, cooling the extrudate by contacting...
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6720076 |
In-mold primer coating for thermoplastic substrates
An in-mold primer coating adapted to be applied in-mold to a thermoplastic substrate and heat cured to form a thermoset surface coating on the molded substrate. The in-mold primer coating comprises...
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6720404 |
Polycarbonates for optical use, and their applications
This specification discloses polycarbonates for optical use. These polycarbonates are prepared by reacting a bisphenol and carbonic diester in the presence of an alkaline compound catalyst. These...
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6720402 |
Shape memory polymers
Shape memory polymer compositions, articles of manufacture thereof, and methods of preparation and use thereof are described. The shape memory polymer compositions can hold more than one shape in...
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6716510 |
Polycarbonate resin for optical disk substrate and optical disk substrate
The present invention relates to a polycarbonate resin that has a viscosity average molecular weight of from 10,000 to 17,000 and has characteristic features in an iron content, a free total phenol...
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6716368 |
Phosporescent polycarbonate and molded articles
The present invention is drawn to a transparent or translucent thermoplastic composition comprising a thermoplastic polycarbonate resin and a phosphorescent phosphor with an aluminate matrix...
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6713593 |
Copolymer comprising alkylene carbonate and method of preparing same
Disclosed are copolymers including an alkylene carbonate, and a method of preparing the same. The copolymers are represented by Formulas 1 and 2, and they are prepared with terpolymerized lactide...
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6713592 |
Bis-hydroxyphenyl menthane polyesters and polyester/polycarbonates and methods for preparing same
Polyphthalate polyesters or polyester/polycarbonates are prepared from phthalates and 4,4′-[1-methyl-4-(1-methyl-ethyl)-1,3-cyclohexandlyl]-bisp
henol.
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6713594 |
Polycarbonate with high extensional viscosity
A thermoplastic molding composition that contains a polycarbonate resin having specific extensional Theological properties is disclosed. The composition is particularly suitable for preparing...
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