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7498397 |
Copolycarbonates, methods of manufacture, and uses thereof
A copolycarbonate of the formula
wherein 5 to 50 mole percent of the total number of R 1 groups is derived from a monomer of formula (2)
wherein each R f is independently at each...
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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...
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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...
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7122614 |
Aromatic polycarbonate resins for optical disk substrates
The present invention provides an aromatic polycarbonate resin product for producing optical disc substrates of high reliability at high molding yield. The aromatic polycarbonate resin for optical...
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6890988 |
Aromatic polyester
The present invention provides an aromatic polyester which is obtained by condensation polymerization reaction of terephthalic acid, 2,6-naphthalenedicarboxylic acid and acylated product obtained...
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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...
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6710152 |
Solid particles
Solid particles containing 10 to 90 parts by weight of a dihydroxy compound and 10 to 90 parts by weight of a carbonic acid ester are disclosed. Also disclosed is a process for the production of...
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6635710 |
Manufacturing method for polycarbonate
A method for manufacturing polycarbonate by melt-polycondensing bisphenol and carbonic acid diester uses as catalyst an alkali metal compound and/or alkaline earth metal compound (a). The catalyst...
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6627121 |
Photochromic naphthopyran compounds
A photochromic naphthopyran of formula (I) wherein R 1 through R 15 , which may be the same or different, are independently selected from the group consisting of hydrogen, C 1 -C 4 alkyl, C 1 -C...
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6590022 |
Process for preparing protective-colloid-stabilized vinylaromatic-1,3-diene copolymers
A method is provided for producing protective colloid-stabilized vinyl aromatic-1.3-diene-copolymers in the form of their aqueous polymer dispersions or in the form of a powder which can be...
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6562433 |
Method for the preparation of polycarbonate with reduced levels of fries
The present invention provides a composition comprising polycarbonate wherein the polycarbonate has a very low Fries content (e.g., above 5 ppm and below 360 ppm). The present invention also...
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6323303 |
Melt polycarbonate catalyst systems
This invention provides a method for preparing polycarbonates, which utilizes polycondensation catalysts which are compounds or complexes of Ruthenium (II) and (III). Preferred catalysts are...
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6262219 |
Method for producing polycarbonate
The present invention relates to a transesterification method for producing solvent-free polycarbonate, using N-alkyl-substituted piperidines or N-alkyl-substituted morpholines comprising C 2 -C...
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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...
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6093784 |
Electrophotographic photoconductor and polycarbonate resin for use therein
An electrophotographic photoconductor is composed of an electroconductive support and a photoconductive layer formed thereon, which photoconductive layer includes a polycarbonate resin. Aromatic...
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6037437 |
Method for producing an aromatic polycarbonate
A method for producing an aromatic polycarbonate which comprises subjecting to a transesterification polymerization reaction at least one polymerizable material selected from a molten monomer...
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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...
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5973102 |
Static resistant polycarbonate compositions
A static resistant polycarbonate composition is provided comprising a polycarbonate, at least one mold release agent, and at least one antistatic agent. The disclosed composition optionally...
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5969084 |
Process for producing polycarbonate resin with high flowability
A process for producing a polycarbonate resin with high flowability having a viscosity average molecular weight (Mv) of 13,000 to 20,000 according to an interfacial polymerization method which...
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5942594 |
Polycarbonate and process for producing the same
A polycarbonate exhibiting excellent fluidity and moisture resistance and a process for efficiently producing the polycarbonate are provided. The polycarbonate has a main chain comprising a...
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5922826 |
Process for producing polycarbonate
There are disclosed a process for producing a polycarbonate through transesterification which comprises using, as a polymerization catalyst, (1) a combination of a nitrogen-containing organic basic...
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5872882 |
Non-linear optical polycarbonates
The invention relates to non-linear optically active (NLO) polycarbonates and to NLO active waveguides containing these polycarbonates. Waveguides containing these NLO polycarbonates have a low...
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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...
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5852156 |
Polycarbonate composition
A polycarbonate composition comprises (a) a substantially chlorine-atom free, aromatic dihydroxy compound/carbonic diester transesterification polycarbonate, and the following components (b), (c)...
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5821322 |
Diaminoalkyl quaternary ammonium salts and method for their preparation and use
Diaminoalkyl quaternary ammonium salts are prepared by the reaction of alkyl halides with tertiary diamines having C 2 -20 primary alkyl radicals attached to nitrogen and an alkyl radical between...
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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...
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5777064 |
Production method of polycarbonate
A method of producing a polycarbonate excellent in the hue, the thermal stability, and the electrolysis stability by supplying a polycarbonate obtained by a transesterification method to an...
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5767224 |
Two-step process for the production of thermoplastic polycarbonate
The invention relates to a two-step melt process for the production of thermoplastic, solvent-free, low-branching polycarbonates with low --OH terminal group content using a self-cleaning...
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5756641 |
Process for producing thermoplastic polycarbonate
The present invention relates to a transesterification process for producing thermoplastic polycarbonates with the use of fixed bed catalysts.
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5717057 |
Method of manufacturing polycarbonate
A method for manufacturing polycarbonate in which an aromatic dihydroxy compound and a carbonic acid diester can be effectively subjected to melt polycondensation using a small amount of a...
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5717055 |
Production method of polycarbonate resin pellets
A method of producing polycarbonate resin pellets containing very less residual organic solvent and low molecular weight volatile matters and having a high transparency by melt-kneading a...
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5712362 |
Process for the production of UV-stable polycarbonates
The invention relates to a process for the production of UV-stable polycarbonates, to the polycarbonates obtainable in accordance with the invention and to their use for the production of sheets,...
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5688896 |
Non-linear optically active polycarbonate
The invention pertains to a non-linear optically active (NLO) side chain polycarbonate and to NLO active waveguides containing said polycarbonate. Waveguides containing this NLO polycarbonate have...
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5684115 |
(Co)polycarbonate composition containing boric acid and a basic catalyst
A processes for producing a (co)polycarbonate having a low terminal hydroxyl group concentration and being excellent in heat resistance and hue, which comprises melt-polycondensing a dihydroxy...
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5670605 |
Copolycarbonate, a copolycarbonate composition, and a method for their manufacture
A heat resistant copolycarbonate comprises a component of the formula: ##STR1## and a component selected from: ##STR2## R 1 and R 2 are same or different halogens or monovalent hydrocarbons, R 3...
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5670604 |
Preparation of a polycarbonate by melt-polycondensation of a dihydric phenol and a carbonic diester
A process for preparing a substantially chloride-ion-free, high-molecular-weight, colorless and transparent polycarbonate by melt-polycondensing a dihydric phenol with a carbonic diester, which...
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5663278 |
(Co)polycarbonate and process for producing the same
A processes for producing a (co)polycarbonate having a low terminal hydroxyl group concentration and being excellent in heat resistance and hue, which comprises melt-polycondensing a dihydroxy...
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5663277 |
Aromatic polycarbonate resin granule and process for the production thereof
An aromatic polycarbonate resin granule formed of an aggregate of fine powder particles, the granule having a specific surface area of 0.05 to 2.0 m 2 /g, a bulk density of 0.3 to 0.8 g/ml, and an...
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5652324 |
Process for the production of thermoplastic polycarbonate
The invention relates to a transesterification process for the production of thermoplastic, solventless oligo-/polycarbonates in which aromatic diphenols and carbonic acid diaryl esters are...
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5652313 |
Two-stage process for the manufacture of thermoplastic polycarbonate
The present invention provides a two-stage melt process for the manufacture of thermoplastic, solvent-free, low-branched polycarbonates with low OH end-group contents with the use of ammonium or...
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5652312 |
Redistribution of organic polyestercarbonate compositions
Polyestercarbonates, particularly those containing aliphatic dicarboxylic acid-derived structural units, are redistributed by heating in the presence of a carbonate redistribution catalyst, and,...
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5644017 |
Polycarbonate terminated by an ionic sulfonated aromatic moiety and preparation thereof
An aromatic polycarbonate is terminated by an ionic sulfonated aromatic moiety bonded to the polycarbonate by a carbonate or ester linkage. The aromatic polycarbonate can be terminated by reacting...
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5637643 |
Polycarbonate resin composition and exterior automotive trim using same
The present invention intends to provide a polycarbonate resin composition which can inhibit the deterioration of the resin, can stably afford molded articles having a high stiffness and a good...
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5631344 |
Block copolymer of polyesters and polycarbonates and process for preparation thereof
The block copolymer of polyesters and polycarbonates comprises at least one of each of the constituting units of (I) and (II) having the general formulae: ##STR1## where the sign * indicates an...
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5627255 |
Poly(arylester-carbonate)s and a process for the preparation of poly(arylester-carbonate)s
Novel poly(arylester-carbonate)s of the formula ##STR1## are disclosed, as well a process for preparing such poly(arylester-carbonate)s.
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RE35499 |
Elimination of monocarbonate from polycarbonate
A polycarbonate composition, and process for making same, wherein the monocarbonate and dicarbonate content is eliminated or limited to negligibly low levels by withholding introduction of chain...
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5618906 |
Process for the production of thermoplastic polycarbonates
A process is described for preparing solvent-free polycarbonate using phosphazene catalysts.
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5606009 |
Copolymerized polycarbonates
The present invention provides copolymerized copolyester-carbonates having improved flow and formability, in addition to excellent mechanical properties, heat resistance, transparency, and water...
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5606008 |
Preparation method of polycarbonate resin
The purpose of the present invention is to provide a method for manufacturing polycarbonate in which polycarbonate having outstanding color matching, outstanding thermal properties, particularly...
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5605754 |
Coated polycarbonate articles
A thermoplastic article having on the outer surface thereof a protective layer having in admixture a trihydricphenol-benzotriazole ultra violet light absorber and a thermoplastic resin preferably a...
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