General Electric Company

Sabic Innovative Plastics IP B.v.

Sabic Global Technologies B.v.

Momentive Performance Materials Gmbh

Jan Pleun Lens

Jan Henk Kamps

Marc Brian Wisnudel

Hans-Peter Brack

Patrick Joseph McCloskey

Daniel R Olson

Kathryn Lynn Longley

Veeraraghavan Srinivasan

Rein Mollerus Faber

James Anthony Cella

Paul Michael Smigelski, Jr

Gautam Chatterjee

Dennis Karlik

Edward Kung

Narayan Ramesh

Warren William Reilly

Robert Dirk Van De Grampel

Theodorus L Hoeks

Johannes Martinus Dina Goossens

Pradeep Jeevaji Nadkarni

Gurram Kishan

Naveen Agarwal

Prakash Purushottam Wadgaonkar

Dibakar Dhara

Edward P Lindholm

Steven Frederick Hubbard

Hendrik Theodorus Van De Grampel

Srinivas Siripurapu

Daniel Francis Lowery

Geert Boven

Hans Looij

Sunil Ashtekar

Bernd Jansen

Emil Markov Georgiev

Arakali Srinivasarao Radhakrishna

Paul Michael Smigelski

Jegadeesh Thampi

Tilak Thulasi Raj

Binod Behari Sahoo

Radhakrishna Arakali Srinivasarao

Nagarajan Arumugam

Chilukuri Ver Avadhani

Hans De Brouwer

Subash Scindia

Radhakrishna Srinivasarao Arakali

Mahesh Malusare

Han Vermeulen

Subarna Shyamroy

Venugopal Bv

Venugopal Boddapaty Venkata

Naveen Agarwal, I

Andre Van Zyl

Joe Parker

Radhakrishna As

Arakali Radhakrishna Srinivasarao

Manisha Potdar

Scindia Dattu Subash

Rubin Huang

Theodorus Lambertus Hoeks

Karin Irene Van De Wetering

Manisha 145/4 Ramesh Reddy Building Potdar

Disclosed herein is are thermoplastic compositions comprising a blend of a homopolycarbonate comprising units derived from an aromatic dihydroxy compound and a copolymer comprising isosorbide units and siloxane units. The copolymer comprising isosorbide units and siloxane units can further comprise non-isosorbide aliphatic units derived from a Caliphatic diacid, a Caliphatic diol or combination of these, aromatic units, aliphatic units derived from an oligomer having a weight average molecular weight of 900 to 4000 or a combination of some or all of the foregoing additional units.

Blends of isosorbide-based copolycarbonate, method of making, and articles formed therefrom

A flame retardant thermoplastic composition comprising in combination a polycarbonate homopolymer or copolymer comprising repeat carbonate units having the following structure: wherein Rand Rare independently at each occurrence a C-Calkyl, n and p are each an integer having a value of 1 to 4, and T is selected from the group consisting of C-Ccycloalkanes attached to the aryl groups at one or two carbons, C-Calkyl groups, C-Caryl groups, and C-Caryl alkyl groups; an impact modifier, wherein the impact modifier comprises wherein the impact modifier comprises a rubber modified thermoplastic resin comprising a discontinuous elastomeric phase dispersed in a rigid thermoplastic phase, and wherein the impact modifier has a specific mean particle size and Q value; and a flame retardant. The compositions have excellent scratch resistance as well as an improved balance of physical properties such as impact strength and spiral flow, while at the same time maintaining their good flame performance.

Flame retardant and scratch resistant thermoplastic polycarbonate compositions

A polycarbonate polymer or copolymer comprising pendant silylated dihydroxy aromatic compound of the formula (1a); wherein Gand Gare each independently Calkyl, &#x2014;OSi(Calkyl), Carylalkyl, or &#x2014;OSi(Carylalkyl); Zand Zare each independently a straight or branched Cis alkylene, a Carylalkylene, or a Calkylarylene, Xis a direct bond, a heteroatom-containing group, or a Corganic group, and r and s are each independently 1 or 2 is disclosed.

Silylated polycarbonate polymers, method of making, and articles

Methods of forming polycarbonate graft copolymers are provided. In particular, a polycarbonate polymer or copolymer containing allyl groups provides the backbone for the graft copolymer, and pendant chains are attached to the copolymer through the allyl groups. The graft copolymers exhibit a combination of high transparency, good graft levels, good scratch resistance, and/or good anti-fog properties.

Polycarbonate graft copolymers

A method of increasing the branching and polydispersity of a polycarbonate includes the steps of: (a) including in the polycarbonate at least one species of an alkyl substituted monomer, and (b) treating the polycarbonate at an elevated temperature and for a sufficient time to increase the branching and polydispersity relative to an otherwise equivalent polycarbonate without alkyl substituents.

Branched polycarbonate resins and processes to prepare the same

A silylated polycarbonate comprises silylated carbonate units, where the silylated carbonate units can be derived from a silylated dihydroxy aromatic compound of the formula (1): wherein Gand Gare each independently Calkyl, &#x2014;OSi(Calkyl), Carylalkyl, or &#x2014;OSi(Carylalkyl); Zand Zare each independently a straight or branched Calkylene, a Carylalkylene, or a Calkylarylene, Xis a direct bond, a heteroatom-containing group, or a Corganic group, and r and s are each independently 1 or 2. A method of forming the silylated dihydroxy aromatic compound, and for forming the silylated polycarbonate, are disclosed. Also disclosed is a thermoplastic composition comprising the silylated polycarbonate, and an article comprising the thermoplastic composition.

Silylated polycarbonate polymers, method of making, and articles formed therefrom

A method of producing a polycarbonate, the method comprising: polymerizing a dihydric phenol and a carbonate precursor in the presence of oxalic acid to produce a polycarbonate with a yellowness index of less than or equal to 10 measured in accordance with ASTM E313 test method on molded samples having a thickness of about 2.5 millimeters; wherein the amount of oxalic acid ranges from about 20 parts per million to about 350 parts per million, relative to an amount of the dihydric phenol; wherein the dihydric phenol is represented by Formula (I):  wherein R is a hydrogen atom or an aliphatic functionality having 1 to 6 carbon atoms; and n is an integer having a value of 1 to 4.

Method of stabilization of dihydric phenols

Windows and other articles made from dimethyl bisphenol cyclohexane (DMBPC) polycarbonate exhibit enhanced scratch resistance properties and Mw degradation resistance properties as compared to traditional polycarbonates. Such windows and other articles made from DMBPC polycarbonate can be used in various applications including buildings, particularly in agricultural environments and in electronic devices.

Windows and other articles made from DMBPC polycarbonate homopolymer and copolymer

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 strategy and adding catalysts according to the strategy. The strategy is sufficient to result in a product copolycarbonate with improved color. The method further includes the steps of introducing the reaction mixture to a series of process units and allowing the reaction mixture to polymerize thereby forming a copolycarbonate. The resulting copolycarbonate has improved color as compared to a copolycarbonate formed in a process without the steps of selecting a catalyst introduction strategy and introducing catalysts according to the selected strategy.

Process for production of copolycarbonates with reduced color

A polymer comprising at least one structural unit derived from a dihydroxy compound of Formula (I) wherein Ris an aromatic divalent functionality having 6 to 60 carbons, Rcan be the same or different at each occurrence and is independently at each occurrence selected from the group consisting of a cyano functionality, a nitro functionality, a halogen, an aliphatic functionality having 1 to 10 carbons, a cycloaliphatic functionality having 3 to 10 carbons and an aromatic functionality having 6 to 10 carbons and 'n' is an integer having a value 0 to 3.

Polymers, polymer compositions and method of preparation

A dihydroxy aromatic compound having a Formula (I), wherein Ris a C&#x2013;Caromatic divalent functionality, Rat each occurrence, can be the same or different and is independently at each occurrence selected from the group consisting of a cyano functionality, a nitro functionality, a halogen, an aliphatic functionality having 1 to 10 carbons, a cycloaliphatic functionality having 3 to 10 carbons and an aromatic functionality having 6 to 10 carbons, and 'n' is an integer having a value of 0 to 4.

Dihydroxy aromatic compounds and methods for preparation

Polycarbonates containing low or undetectable levels of Fries rearrangement products and comprising repeat units derived from one or more of resorcinol, hydroquinone, methylhydroquinone, bisphenol A, and 4,4'-biphenol have been prepared by the melt reaction of one or more of the aforementioned dihydroxy aromatic compounds with an ester-substituted diaryl carbonate such as bis-methyl salicyl carbonate. Low, or in many instances undetectable, levels of Fries rearrangement products are found in the product polycarbonates obtained as the combined result of a highly effective catalyst system which suppresses the Fries reaction and the use of lower melt polymerization temperatures relative to temperatures required for the analogous polymerization reactions using diphenyl carbonate.

Method of polycarbonate preparation

Alkyl ester end-capped polycarbonates have improved release properties and may be produced by a method comprising the step of combining a polycarbonate having free terminal OH groups with an end-capping reagent comprising a symmetrical activated carbonate and an alkyl ester, whereby the end-capping reagent reacts with at least some of the free hydroxyl end groups of the polycarbonate to produce an end-capped polycarbonate comprising optionally substituted aliphatic ester end groups.

Method for incorporating alkyl ester endgroups to improve the release properties of melt polycarbonate

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 strategy and adding catalysts according to the strategy. The strategy is sufficient to result in a product copolycarbonate with improved color. The method further includes the steps of introducing the reaction mixture to a series of process units and allowing the reaction mixture to polymerize thereby forming a copolycarbonate. The resulting copolycarbonate has improved color as compared to a copolycarbonate formed in a process without the steps of selecting a catalyst introduction strategy and introducing catalysts according to the selected strategy.

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 reaction mixture. The method further includes the steps of introducing an antioxidant such as a hydroxycarboxylic acid to the reaction mixture in an amount sufficient to reduce color formation and introducing the reaction mixture to a series of process units wherein the reaction mixture polymerizes. The resulting copolycarbonate has improved color as compared to a copolycarbonate formed in a process without the step of introducing an antioxidant to the melt polymerization process.

Growing community of inventors

Breda, Netherlands

Jan Pleun Lens