General Electric Company

Union Camp Corporation

Ronald James Wroczynski

John Patrick Lemmon

Robert Russell Gallucci

Radislav Alexandrovich Potyrailo

Charles R Frihart

John Bennie Yates, Iii

Gim Fun Lee, Jr

Patrick Joseph McCloskey

John B Yates

Roger W Avakian

William Guy Morris

James Norman Cawse

Andrew Michael Leach

Caibin Xiao

Kathryn Sue Hayes

Scott Martell Boyette

Oltea Puica Siclovan

Peter D Miller

Alexandros Hasson

Christiaan Henricus Koevoets

Jan Peter Keulen

Ronald Eugene Shaffer

Ralph Joseph May

Darchun Billy Yang

James F Jones

Kim Choate

Stefan F Rasch

Kevin J Sheehan

Jay Kumar Gianchandani, Deceased

Patrick A Rodgers

Neil Andrew McGaughan

Jay K Gianchandai, Deceased

Glenn Alfred Johnson

Paul Cletus Raymond Iii

Angela R Neff

An article includes a substrate assembly for use in a detector system. The substrate assembly includes a substrate; a sample reception structure secured to the substrate; a test window extending through the substrate; and a fluid channel defined by a surface of the substrate and extending from the sample reception structure to the test window.

Article, device, and method

A method comprises (A) defining a first experimental space comprising factors of at least two mixtures with at least one common factor, (B) defining a second experimental space by deleting duplicate factor combinations from the first experimental space and (C) conducting an experiment on the second experimental space. A system comprises a processor that (A) defines a first experimental space comprising factors of at least two mixtures with at least one common factor and (B) defines a second experimental space by deleting duplicate factor combinations from the first experimental space. The system also comprises a reactor and evaluator to select a best case set of factors from the second experimental space by a combinatorial high throughput screening (CHTS) method to select a best case set of factors from the second experimental space.

Method for defining an experimental space and method and system for conducting combinatorial high throughput screening of mixtures

The present invention relates to a synthetic method comprising contacting at least one diaryl carbonate with one or more dihydroxy aromatic compounds in the presence of a transesterification catalyst under melt polymerization conditions to afford a product polycarbonate. The transesterifcation catalysts used according to the method of the present invention are azonaphthalene sulfonates in combination with tetraalkylammonium or tetraalkylphosphonium compounds which serve as co-catalysts. The transesterification catalysts employed according to the method of the present invention provide polycarbonates having reduced levels of Fries rearrangement product relative to conventionally employed catalysts such as sodium hydroxide in combination with tetramethylammonium hydroxide co-catalyst.

Azonaphthalene sulfonates as polymerization catalysts

The present invention relates to a synthetic method in which one or more diaryl carbonates is reacted with one or more dihydroxy aromatic compounds in the presence of a transesterification catalyst under melt polymerization conditions to afford a product polycarbonate. The transesterifcation catalysts used according to the method of the present invention are alkali metal salts and alkaline earth metal salts of heterocyclic diols in combination with tetraalkylammonium or tetraalkylphosphonium compounds which serve as co-catalysts. The furan diol derivative dimethyl 3,4-dihydroxy-2,5-furandiacarboxylate disodium salt, structure IV, was shown to possess excellent activity as a transesterifcation catalyst for the preparation of polycarbonate under melt polymerization conditions. The catalysts employed according to the method of the present invention provide polycarbonates having substantial molecular weight (M &tilde;8000-10000 daltons) and reduced levels of Fries rearrangement product relative to conventionally prepared melt polycarbonate having a similar molecular weight.

Salts of heterocyclic diols as catalysts for melt polycarbonate

The present invention is directed to a method for the rapid screening of potential reactants, catalysts, and associated process conditions. In an embodiment, the invention comprises a method for evaluating catalyst efficacy in polymerization reactions by the determination of product molecular weight and Fries products.

Method for high-throughput fluorescent screening of polymerization reactions

The present invention relates to a synthetic method in which one or more diaryl carbonates is reacted with one or more dihydroxy aromatic compounds in the presence of a transesterification catalyst under melt polymerization conditions to afford a product polycarbonate. The transesterifcation catalysts used according to the method of the present invention are alkali metal salts and alkaline earth metal salts of organic phosphates in combination with tetraalkylammonium or tetraalkylphosphonium compounds which serve as co-catalysts. The organic phosphate derivative adenosine 5&prime;-monophosphate disodium salt was shown to possess excellent activity as a transesterifcation catalyst for the preparation of polycarbonate under melt polymerization conditions. The catalysts employed according to the method of the present invention provide polycarbonates having substantial molecular weight (M &tilde;8000-10000 daltons) and reduced levels of Fries rearrangement product relative to conventionally prepared melt polycarbonate having a similar molecular weight.

Salts of organic phosphates as catalysts for melt polycarbonate

The present invention relates to a synthetic method comprising contacting at least one diaryl carbonate with one or more dihydroxy aromatic compounds in the presence of a transesterification catalyst under melt polymerization conditions to afford a product polycarbonate. The transesterifcation catalysts used according to the method of the present invention are alkali metal salts and alkaline earth metal salts of organic polyacids in combination with tetraalkyl ammonium or tetraalkyl phosphonium compounds which serve as co-catalysts. The transesterification catalysts are derived from polyacids containing both CO H groups and SO H groups and from polyacids containing exclusively CO H groups or exclusively SO H groups. The catalysts employed according to the method of the present invention provide polycarbonates having reduced levels of Fries rearrangement product relative to conventionally employed catalysts such as sodium hydroxide.

Salts of organic polyacids as polymerization catalysts

This invention provides a method for preparing polycarbonates, which utilizes polycondensation catalysts which are derivatized pyridyl triazinyl pyridyl macromolecules with the general formula A &lsqb;(Triazinyl-Pyridyl)B &rsqb;, where A is certain alkali metals, B contains a charge balancing sulfonate, carboxylate, or phosphonate group. We have found that this new class of catalysts provide excellent polymerization rates for the preparation of Bisphenol A polycarbonate from the melt polymerization of diphenyl carbonate and Bisphenol A. Moreover, the catalysts of the invention were found to be very selective in substantially reducing the level of branching side reaction, i.e., formation of Fries product, normally associated with the melt polycarbonate process.

Melt polycarbonate catalyst systems

A method for determining flame retardance of polymer compositions includes subjecting a plurality of specimens of a polymer composition to a flame test and performing a statistical analysis of the data obtained. The statistical analysis includes determining the probability of at least one possible outcome of the flame test. The probability of possible outcomes provides a measure of the flame retardance of the polymer composition. A preferred flame test is the UL-94 flame test.

Method for determining flame retardance of polymer compositions

This invention provides a method for preparing polycarbonates, which utilizes polycondensation catalysts which are salts of certain phenanthroline compounds. We have found that this new class of catalysts provide excellent polymerization rates for the preparation of Bisphenol A polycarbonate from the melt polymerization of diphenyl carbonate and Bisphenol A. Moreover, the catalysts of the invention were found to be very selective in substantially reducing the level of branching side reaction, i.e., formation of Fries product, normally associated with the melt polycarbonate process.

This invention provides a method for preparing polycarbonates, which utilizes polycondensation catalysts which are salts of macrocyclic polypyrroles with the general formula A,&lsqb;(Porphine&minus;Tm)B,&rsqb; or A,&lsqb;(Phthalocyanine&minus;Tm)B,&rsqb;, where A is certain alkali metals, B contains a charge balancing sulfonate, carboxylate, or phosphonate group and Tm is a transition metal are useful as polycarbonate melt polymerization catalysts. We have found that this new class of catalysts provide excellent polymerization rates for the preparation of Bisphenol A polycarbonate from the melt polymerization of diphenyl carbonate and Bisphenol A. Moreover, the catalysts of the invention were found to be very selective in substantially reducing the level of branching side reaction, i.e., formation of Fries product, normally associated with the melt polycarbonate process.

Improved thermoplastic compositions that are resistant to die beard growth are described herein, comprising poly(phenylene ether) resins, polyamide resins and an amount of a beard growth reducing agent selected from the group consisting of non-elastomeric polyolefin resins, partially fluorinated polyolefins, and mixtures of non-elastomeric polyolefin resins and partially fluorinated polyolefins, effective for inhibiting beard growth. The compositions may further comprise at least one impact modifier, flow promotor or filler.

Compositions of poly(phenylene ether) and polyamide resins, which

Polymer blend compositions comprise (a) a polyphenylene ether polymer, (b) a polyphthalamide comprising the reaction product of (i) hexamethylene diamine or a mixture of hexamethylene diamine and trimethylhexamethylene diamine, and (ii) terephthalic acid, and optionally (iii) at least one acid selected from the group consisting of isophthalic acid and adipic acid, provided that a mixture of said diamines is employed if reactant (iii) is absent, and (c) at least one compatibilizer. The compositions may further include an aliphatic polyamide and/or an impact modifier.

Compatibilized blends of polyphenylene ether and polyphthalamide

Improved thermoplastic compositions based on compatibilized blends of polyphenylene ether and polyamide are disclosed. These compositions contain radial block copolymers (such as those based on styrene/butadiene) having at least three polymer chains which often terminate with non-elastomeric segments.

Compositions which contain polyphenylene ether and polyamide resin

An improved flame-retardant composition comprises an aromatic carbonate polymer in admixture with a flame retardant amount of a compound containing aromatically bound bromine, which composition includes an epoxidized cycloaliphatic compound to retard dripping of flaming resin when articles molded from the composition are directly exposed to an open flame, especially after exposure to a humid atmosphere.

Growing community of inventors

Schenectady, NY, United States of America

Ronald James Wroczynski