Sabic Global Technologies B.v.

Sabic Innovative Plastics IP B.v.

General Electric Company

Ignacio Vic Fernandez

David Del Agua Hernandez

Cornelis Jan Maria Rijken

Jorge A Garcia Agudo

Sergio Ferrer Nadal

Mykhaylo Lyakhovych

Helena Varela Rizo

David Domingo Fuster

Eugene Pauling Boden

Gerardo Hidalgo Llinas

Miguel Angel Salomon

Larry Neil Lewis

Robert Dirk Van De Grampel

James Franklin Hoover

Ganesh Kailasam

John Yaw Ofori

Miguel Angel Salomon Cheliz

Mario Perez Collado

Isabel Macian Aviles

Kazutoyo Uno

Hans-Peter Brack

Roland Sebastian Assink

Amanda Marie Flores

Christianus Johannes Jacobus Maas

Paulus Johannes Maria Eijsbouts

Alberto Nisoli

Rein Mollerus Faber

Dennis James Patrick Maria Willemse

Tamara Marijke Eggenhuisen

Jaykisor Pal

Vinod Sankaran Nair

Peter Kennedy Davis

William E Hollar, Jr

Surya Prakasa Rao Daliparthi

Laurus Van Der Wekke

Eduardus Ludovicus Louisa Broekaart

Aaron David Bojarski

Thodla Ramgopal

Maarten Campman

Vutukuru Lakshmi Narasimha Murthy

Fernando Olmedo Fernandez

Donald E Owens, Iii

Venugopal Boddapaty Venkata

David Domingo

Angel Sanchez Gonzalez

Fernan Mateos Salvador

Alfredo Lopez Carretero

Jorge Garcia Agudo

Benoit Fillion

Vutukuru Murthy

Marco Roncaglia

Vijaya Kumar Narasaiah

Gerardo Hidalgo-Llinas

Alfredo Lopez-Carretero

Jose Antonio Caballero

Juan Javaloyes Anton

Campman Maarten

Thodia Ramgopal

William E Hollar Jr

Reimo Mollerus Faber

Donald E Owens Iii

Juan Javaloyes Antón

Uno Kazutoyo

A method of preparing a polycarbonate composition in a polymerization system that includes a monomer mixing unit, an oligomerization section, and a polymerization section. The method includes melt polymerizing a dihydroxy compound with a diaryl carbonate compound in the presence of a quaternary phosphonium catalyst to produce the polycarbonate composition having a phosphorus-containing byproduct of at least one of the quaternary phosphonium catalyst or of the diaryl carbonate compound. The method further includes recycling the phosphorus-containing byproduct into the monomer mixing unit of the polymerization system and removing the polycarbonate composition from the polymerization system. The recycle stream has a phosphorus concentration of greater than or equal to 40 parts per million by weight.

Polycarbonate compositions with improved oxidation stability and methods of manufacturing the same

A method for the continuous multi-stage manufacture of an end-capped polycarbonate includes, i) preparing a monomer mixture in a monomer mixing stage by mixing a bisphenol, a diaryl carbonate and optionally a transesterification catalyst in at least one monomer mixing device, ii) preparing a carbonate oligomer in an oligomerisation stage by reacting the monomer mixture in at least one oligomerisation reactor, and iii) preparing the polycarbonate in a polymerisation stage by further reacting the carbonate oligomer of the oligomerisation stage in at least one polymerisation reactor, in which an end-capping agent different from phenol and having a single phenolic hydroxy group is added to the monomer mixture in the monomer mixing stage and/or to at least one oligomerisation reactor in the oligomerisation stage.

Method for the manufacture of polycarbonate

The present invention relates to an aromatic polycarbonate obtained via the melt transesterification of a diaryl carbonate, a bisphenol and an endcapping agent selected from paracumyl phenol, dicumyl phenol, p-tert-butyl phenol and mixtures of at least two of said endcapping agents, said polycarbonate having a melt volume rate of at least 20 cm/10 min (ISO 1133, 300° C., 1.2 kg), a terminal hydroxyl group content of at most 800 ppm by weight, a Fries branching content of at most 1300 ppm by weight and a content of bulky end groups of at least 20 mol % defined as the sum of the mol % of end-groups based on said bisphenol and the mol % of end-groups based on said endcapping agent.

Polycarbonate

In an embodiment, a reactor for carrying out a melt transesterification reaction at a reactor temperature of 160 to 300&#xb0; C. and a reactor pressure of 5 to 200 mbar, comprises a cylindrical tank comprising a top, a side, and a bottom, wherein the bottom is convex, extending away from the top; a stirring shaft disposed within the cylindrical tank along an axis thereof so that it is rotatable from outside of the cylindrical tank; a stirring blade extending from the stirring shaft in the cylindrical tank; a reactant solution inlet located on the bottom; and a reaction solution outlet located on the bottom. The reactor can be used for the polymerization of a polycarbonate oligomer.

Oligomeriser with an improved feed system

A molded article includes a polycarbonate resin, an ultraviolet (UV) absorbing component, a heat stabilizer component and an acid stabilizer component. The polycarbonate resin is produced by an interfacial polymerization process and has an end-cap level of at least about 98%, and includes a ratio of bound UV absorbing component to free UV absorbing component of less than about 1.0 when molded under abusive molding conditions. The polycarbonate resin may include high purity polycarbonate. The acid stabilizer component may include a sulfonic acid ester. Methods of forming molded articles are also described.

Abusively molded article including UV-stable polycarbonate

The disclosure concerns a polymer blend derived from transesterification of (i) 69.9 to 95 weight percent polycarbonate; and (ii) 4.9 to 30 weight percent liquid crystal polymer; in the presence of 0.01 to 0.1 weight percent catalyst; wherein the polymer is transparent.

Polycarbonate and liquid crystal polymer blends

A process for manufacturing a polycarbonate composition includes melt polymerizing a dihydroxy compound and a carbonate compound in the presence of a catalyst to form a polycarbonate; and adding 1 to 400 ppm of glycerol tristearate to form the polycarbonate composition, wherein the polycarbonate composition is unquenched.

Polycarbonate composition to produce optical quality products with high quality and good processability

The disclosure concerns a polymer derived from melt extrusion of (i) 80 to 95 wt % polycarbonate; said polycarbonate having and endcap level of 45% to 80% and a branching level of 300-5,000 m comprising the following branching structures: (ii) 4.9 to 20 wt % polymethyl methacrylate; and (iii) 0.1 to 1.5 wt % of catalyst; wherein the polymer is transparent, and wherein transesterification occurs with at least a portion of the polycarbonate and the polymethyl methacrylate during melt extrusion.

Polymer blends comprising polycarbonate and polymethyl methacrylate

In an embodiment, a method for making a thermoplastic composition, comprising: melt polymerizing a polycarbonate, extruding and melt filtering the polycarbonate to form a melt filtered polycarbonate; forming the thermoplastic composition comprising the melt filtered polycarbonate, 0.03 to 0.05 wt % of a triacylglyceride release agent; and 0.10 to 0.14 wt % of a UV stabilizer; wherein the weight percentages are based on the total weight of the composition; and extruding the thermoplastic composition.

Enhanced polycarbonate extrusion grades

Melt polymerization processes for producing photoactive additives are disclosed. The photoactive additives are cross-linkable polycarbonate resins formed from a benzophenone, a dihydroxy chain extender, a carbonate precursor, and a catalyst. The additives can be produced without the use of phosgene or dichloromethane, and can be cross-linked with other polymers upon exposure to UV radiation.

Melt reaction process for crosslinkable polycarbonates

In an embodiment, a melt polymerization process comprises melt polymerizing a carbonate compound and a dihydroxy compound in the presence of a catalyst composition to form a polycarbonate; and adding an end-capping agent comprising a mono-phenolic compound to the polycarbonate, wherein the adding of the end-capping agent comprises at least one of adding the end-capping agent just upstream of a final polymerization unit, adding the end-capping agent directly into the final polymerization unit, and adding the end-capping agent downstream of the final polymerization unit; wherein a molecular weight of the polycarbonate increases by less than 10% downstream of the final polymerization unit.

Method of polymerizing end-capped polycarbonate and end-capped polycarbonates derived therefrom

In an embodiment, a melt polymerization process comprises melt polymerizing reactants in at least two polymerization units, in the presence of a catalyst composition to form polymerized polycarbonate; adding a quencher composition comprising one or both of a liquid quencher composition and a solid quencher composition; mixing the quencher composition with the polymerized polycarbonate for a period of time of greater than or equal to 5 seconds prior to the addition to the polymerized polycarbonate of any additives having a reactive OH group or reactive ester group; directing the polymerized polycarbonate to an extruder; and directing an additive to the extruder.

Melt polymerization polycarbonate quenching

In an embodiment, a polycarbonate polymerization process comprises interfacially polymerizing a carbonate compound and dihydroxy compound in the presence of an interfacial catalyst to form a polycarbonate and adding a viscosity reducing agent and a transesterification catalyst to polycarbonate upstream of a first filter to form an adjusted polycarbonate. The first filter can be replaced with a replacement filter and the adjusted polycarbonate can be introduced to the replacement filter. The flow can be diverted to a replacement filter. The process further comprises reducing the addition rate of the viscosity reducing agent and the transesterification catalyst until the addition rate is 0 mol/hr.

Filter alignment in a polycarbonate production process

In an embodiment, a method for producing an aryl alkyl carbonate can comprise: reacting methanol with a dicarbonate in the presence of a catalyst to form a mixture comprising an aryl alkyl carbonate and a hydroxy compound, where methanol is in an acetone monomer mixture comprising acetone and at least one of diaryl carbonate and dihydroxy compound separating the aryl alkyl carbonate from the mixture.

Method of melt polymerizing polycarbonate and the polycarbonate made therefrom

A process for purifying a diaryl carbonate, comprises introducing an aqueous stream to a diaryl carbonate stream that comprises a metal contaminant, wherein the aqueous stream reacts with the metal contaminant to form a precipitate; wherein introducing the aqueous stream to the diaryl carbonate stream results in introducing 100 to 10,000 ppm water based on the total composition of the diaryl carbonate stream and the aqueous stream; removing the precipitate via one or both of a separation column and a filter to result in a purified diaryl carbonate.

Process for purification of diphenyl carbonate for the manufacturing of high quality polycarbonate

Growing community of inventors

Murcia, Spain

Ignacio Vic Fernandez