|
Match
|
Document |
Document Title |
|
|
5929193 |
Process for preparation of polycarbonate copolyester diols
The invention describes a process for the preparation of polycarbonate copolyester diols with a molecular weight ranging between 1000 and 6000 units having the following general formula: ##STR1##...
|
|
|
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...
|
|
|
5922827 |
Process for producing a polycarbonate
A diaryl carbonate is produced by decarbonylating a diaryl oxalate, which can be prepared by transesterification of a dialkyl oxalate with a hydroxyaryl compound, in the presence of a catalyst,...
|
|
|
5916998 |
Copolymers with polyester polycarbonate blocks containing poly(caprolactone) segments, and use thereof for the preparation of biodegradable matrices
The invention relates to block copolymers of general formula (I) -- --O--CO--O--A--O--CO--O--B--! a -- (I) where a is an integer between 2 and 300 inclusive; A and B, which...
|
|
|
5916980 |
Polycarbonate resin composition
A polycarbonate polymer and resin composition having excellent transparency and abrasion resistance, comprising a mixture of (i) a polycarbonate polymer having a repeating unit having a specific...
|
|
|
5914386 |
Copolyester elastomer
The invention relates to a novel copolyester elastomer essentially made up of A: hard polyester segments made up of repeating units derived from an aliphatic diol and an aromatic dicarboxylic acid...
|
|
|
5912318 |
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 for an aromatic polycarbonate, the...
|
|
|
5910562 |
Copolycarbonate resin and resin composition comprising the same
A copolycarbonate resin containing a structural unit derived from bisphenol A and a structural unit derived from 3,9-bis(2-hydroxy-1,1-dimethylethyl)-2,4,8,10-tetraoxaspiro 5,5!undecane or a...
|
|
|
5908916 |
Cross-linked or cross-linkable optical polycarbonates and optical components comprising said optical polycarbonates
The present invention is in the field of optical polymers, more particularly, optical polycarbonates for use in optical components. The present invention provides a cross-linkable or cross-linked...
|
|
|
5907027 |
Reducing ionic impurities content in aromatic polycarbonate resins
An aromatic polycarbonate composition having less than 400 parts per billion each of ionic impurities, particularly sulfate, chloride and fluoride ions prepared by devolatilizing the ionic...
|
|
|
5907026 |
Polycarbonate compositions comprising polyester resins and ultraviolet light absorbers
Weatherable polycarbonate compositions (formulations or blends) comprise polycarbonate, cycloaliphatic polyester resins, at least one of a benzotriazole, benzophenone, and triazine based UVA, and a...
|
|
|
5905135 |
Method of preparing polycarbonates by solid state polymerization
Crystallization of precursor polycarbonates prior to solid state polymerization is achieved by contact with a non-solvent comprising, at least in part, a dialkyl carbonate such as dimethyl...
|
|
|
5895718 |
Thermoplastic resin compositions and temperature-dependent shape-transformable/fixable products making use of the same
A thermoplastic resin composition comprising a thermoplastic resin (A) and a thermoplastic polymer (B) having a glass transition temperature within the range of from -20° C. to 70° C. which are...
|
|
|
5886132 |
Method for controlling the effective level of catalyst during the preparation of a polycarbonate polymer by transesterification
A method for determining the effective level of catalyst for the preparation of a polycarbonate polymer by a transesterification reaction is disclosed. The method involves measurement of the...
|
|
|
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...
|
|
|
5880248 |
Polycarbonate, copolycarbonate resin compositions and preparing method thereof
A copolycarbonate containing the component units shown in Formula I! below in the amount of 50-99 mole %: ##STR1## R1 and R2 are hydrogen atoms or monovalent hydrocarbon groups, and R3 is a...
|
|
|
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...
|
|
|
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...
|
|
|
5864006 |
Method of making polycarbonate prepolymer and method of making high molecular weight polycarbonate
Polycarbonate prepolymer is crystallized using a water and solvent mixture, or by application of a shear force while heating, or by orientation of the prepolymer with a shear force followed by a...
|
|
|
5864004 |
Flame retardant polymer resin composition having improved heat distortion temperature and mechanical properties
A flame retardant resin composition having improved heat distortion temperature and mechanical properties comprising 5-20 parts by weight of phosphate-based flame retardant and 0.01-10 parts by...
|
|
|
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...
|
|
|
5854374 |
Phosphonium borohydride compound and process for producing polycarbonate using said compound
A process for producing a polycarbonate including melt polycondensing an aromatic dihydroxy compound and a carbonic acid diester in the presence of a phosphonium borohydride catalyst(I), ##STR1##...
|
|
|
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)...
|
|
|
5852158 |
Thermoplastically moldable compositions
The mold release performance of pentaerythritol esters is enhanced in polycarbonate resin moldings by partial replacement with an ester of dipentaerythritol.
|
|
|
5852157 |
Process for the production of polycarbonate agglomerate
This invention relates to a process for the production of polycarbonate agglomerate of high bulk density from polycarbonate solutions, in which the organic solvent is stripped from a solution of...
|
|
|
5847069 |
Process for the preparation of polycarbonate copolyether polyols
A process is described for the preparation of polycarbonate polyether polyols characterized in that dimethylcarbonate (DMC) and one or more polyether diols are reacted at a ratio DMC/polyether...
|
|
|
5840826 |
Process for preparing aromatic polycarbonate
Disclosed is a method for producing an aromatic polycarbonate which comprises subjecting to a transesterification reaction in a polymerizer at least one polymerizable material selected from a...
|
|
|
5830977 |
Process for the isolation of partially crystalline polycarbonate powder
The present invention provides a process for the isolation of partially crystalline polycarbonate powder or oligocarbonate powder from solutions thereof, in which process the organic solvent of a...
|
|
|
5821321 |
Molding composition having improved impact strength
A thermoplastic molding composition having improved impact strength and a process for its preparation are disclosed. The structure of the resinous component of the composition contains carbonate...
|
|
|
5817729 |
Vapor precipitation of polymers from solvent polymer blends by azeotropic spray drying
A process for removing contaminating solvents from solutions containing solid solutes comprising contacting a co-solvent that forms an azeotrope with the contaminating solvent forming a mixture...
|
|
|
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...
|
|
|
5807914 |
Glass fiber-reinforced polycarbonate resin composition
The present invention relates to a glass fiber-reinforced polycarbonate resin composition comprising: (A) 70 to 92% by weight of an aromatic polycarbonate resin; (B) 1 to 20% by weight of an...
|
|
|
5807964 |
Process for the preparation of polycarbonates
A process for the preparation of poly(arylcarbonate)s, relying on reaction of dialkyl carbonates with bisphenols and using selected organotin and oganotitanium catalysts. The process is preferably...
|
|
|
5795952 |
Two-stage process for the preparation of polycarbonate copolyether diols
A process for the preparation of polycarbonate copolyether diols comprising two successive reaction stages wherein in the first stage the precursor, bisdimethylcarbonate of polyether diols is...
|
|
|
5786440 |
Mixtures of cyclic oligocarbonates and their manufacture
A process for the manufacture of cyclic oligocarbonate is disclosed. The process comprises a reaction of a bis-chlorocarbonic acid ester with isatinbisphenol or with a bis-chlorocarbonic ester...
|
|
|
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...
|
|
|
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...
|
|
|
5776573 |
Compact disc revitalizer formulations and revitalizer
A composition for use in refinishing optical discs comprises a mixture of volatile organic solvents having solubility parameters within a defined range, a chemically reactive nonvolatile binder,...
|
|
|
5767225 |
High melting fast crystallizing copolymer compositions
Disclosed are copolycarbonate compositions comprising structural units of Formula I ##STR1## Formula II ##STR2## wherein R 2 represents --CH 3 , --C 2 H 5 , or propyl; A is a divalent organic...
|
|
|
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...
|
|
|
5762849 |
Molding material
Plastic blends are provided that contain polyester and polycarbonate in combination with isocyanates or isocyanurates or their derivatives and bis(oxazoline) derivatives as additives, to give a...
|
|
|
5762851 |
Method of producing polycarbonate pellets
A method for producing a polycarbonate pellet which comprises subjecting a melt-extruded polycarbonate to a cooling step and a cutting step, the steps being carried out in either order or...
|
|
|
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...
|
|
|
5760156 |
Manufacturing method for polycarbonate
A manufacturing method for polycarbonate comprising I! a process for manufacturing diaryl carbonate from an aromatic hydroxy compound and an aromatic hydroxy compound, II! a process for...
|
|
|
5760160 |
Aromatic polycarbonate resin granule
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...
|
|
|
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.
|
|
|
5747632 |
Polycarbonate resin with high flowability and process for producing the same
Disclosed are a polycarbonate resin with high flowability having a viscosity average molecular weight (Mv) of 13,000 to 20,000 and containing below 1% by weight of low molecular weight carbonate...
|
|
|
5747609 |
Method for producing an aromatic polycarbonate having improved melt stability
Disclosed is a method for producing an aromatic polycarbonate, which comprises: reacting a feedstock dialkyl carbonate with a feedstock phenol in the presence of a catalyst to produce diphenyl...
|
|
|
5739257 |
Binary phase transfer/amine catalyst for making aromatic polycarbonates
A composition and method is provided for making polycarbonate utilizing an effective amount of a binary catalyst system, comprising a phase transfer catalyst selected from the group consisting of...
|
|
|
5739258 |
Process for preparing diaryl carbonates and the polycarbonates obtainable therefrom
The invention relates to a process for preparing a diaryl carbonate by oxidative carbonylation of the basic aromatic hydroxy compound, in which the aromatic hydroxy compound is the one which is...
|