General Electric Company

Cyclics Corporation

Liquid Thermo Plastics, Inc.

Maxymillan Technologies, Inc.

Jimmy Lynn Webb

James Lawrence Spivack

James Edward Pickett

Herman Otto Krabbenhoft

Randall Lee Carter

Daniel Joseph Brunelle

Patrick Joseph McCloskey

Thomas Link Guggenheim

Joseph A King, Jr

David Gilles Gascoyne

Tiberiu Mircea Siclovan

Cathryn Ellen Olsen

Charles M Orlando

Daniel R Olson

Peter David Phelps

Hua Wang

Joseph Anthony Suriano

Woodfin V Ligon, Jr

Matthew Hal Littlejohn

Joseph B Williams

William K Cleveland

Frank Axel Hoefflin

Robert Joseph Nick

Therese C Jordan

Bharat M Mehta

David Patrick Phelon

Paul M Andrusyszyn

Victor Mark

Paul Dean Sybert

Sterling B Brown

Roy Ray Odle

Slawomir Rubinsztajn

Tohru Takekoshi

Susan Adams Nye

Deborah Ann Haitko

Robert Edgar Colborn

Timothy Mark Sivavec

David Michel Dardaris

Timothy Edward Banach

Arnold Factor

Hongyi Zhou

Youssef El-Shoubary

Norman Enoch Johnson

Margaret Louise Blohm

Marsha Mottel Grade

Walter L Hall

Gregory Allen O'Neil

Donald Joseph Buckley

Joseph John Caringi

Michael R MacLaury

Amy Kathleen Simonian

Gary R Faler

Joseph Richard Wetzel

Norman Zethward Shilling

Pin-pin Wu

John E Corn, Jr

Victoria Jean Eddy-Helenek

Louis A Mango, Iii

Donald L Phipps

Georgia Dris Fishburn

Cleveland William K S

James Mihalich

Robert E Greenwell

James M Lambert

Hans V Ritschard

Stephen Allen Warren

James Hall Maxymillian

Tiberiu Mircca Siclovan

YeGang Lin

The invention relates to methods and systems for preparing macrocyclic polyester oligomer (MPO) directly from monomer via heterogeneous catalysis, rather than by depolymerizing a polyester. For example, in an exemplary embodiment, cyclic poly(butylene terephthalate) (cPBT) is produced by reacting butanediol (BDO) and dimethylterephthalate (DMT) in an organic solvent&#x2014;for example, ortho-dichlorobenzene (oDCB). The mixture flows over (or otherwise contacts) the catalyst-coated fiberglass or silica gel, e.g., which is packed in a column or bed. MPO is produced in the reaction mixture, while residual linears and catalyst residue remain in the column/bed.

Methods for preparation of macrocyclic polyester oligomer via heterogeneous catalysis

The invention relates to methods and systems for the use of an oligomer recyclate from a depolymerization product stream. The oligomer byproduct of a polyester depolymerization reaction can be used as a reactant in the formation of a polyester. For example, linear oligomer byproduct can be used as a reactant in a solution polymerization to form a low-acid polyalkylene terephthalate.

Use of a residual oligomer recyclate in the production of macrocyclic polyester oligomer

The invention relates to methods and systems for selective removal of catalyst residue from a depolymerization product stream without a water quench, as well as methods and systems for subsequent recovery of residual linear oligomer. The substantially metal-free and substantially water-free residual oligomer byproduct can then be advantageously used as recyclate in a process for preparing MPO. For example, the residual oligomer recyclate can be used as a reactant in the polymerization and subsequent depolymerization (cyclization) of low-acid polyester to form MPO.

Methods for removing catalyst residue from a depolymerization process stream

Substantially solvent-free multilayer articles characterized by excellent color retention and gloss retention, solvent resistance and recyclability comprise a substrate layer which may be at least one of polycarbonates, polyesters and ABS and ASA copolymers, and a resinous coating layer which contains resorcinol or alkylresorcinol isophthalate/terephthalate ester units. An intermediate layer may also be present.

Weatherable multilayer resinous articles and method for their preparation

This disclosure relates to a method for producing and using catalysts in the production of bisphenols, and in particular to a method for producing catalysts which contain poly-sulfur mercaptan promoters, and using these catalysts in the production of bisphenol-A and its derivatives.

Method for producing bisphenol catalysts and bisphenols

Substantially solvent-free multilayer articles characterized by excellent color retention and gloss retention, solvent resistance and recyclability comprise a substrate layer comprising a first material selected from the group consisting of a metal, ceramic, glass, a cellulosic material, a thermoset resin, and a thermoplastic resin, and a resinous coating layer which comprises resorcinol or alkylresorcinol isophthalate/terephthalate ester units. An intermediate layer may also be present.

Block copolyestercarbonates may be prepared by first conducting a reaction between at least one of resorcinol or an alkyl- or haloresorcinol and at least one aromatic dicarboxylic acid dichloride, preferably isophthaloyl dichloride, terephthaloyl dichloride or a mixture thereof, to produce a hydroxy-terminated polyester intermediate, and then conducting a reaction of the intermediate with a carbonate precursor, preferably in the presence of a dihydroxy compound such as bisphenol A. The products have excellent physical properties, including a high degree of weatherability. They may be blended with other polymers such as polycarbonates, poly(alkylene carboxylates), polyarylates, polyetherimides, and addition polymers to improve the weatherability thereof.

Weatherable block copolyestercarbonates and blends containing them, and method

Block copolyestercarbonates substantially free of anhydride linkages linking at least two mers of the polymer chain may be prepared by a method which comprises the steps of: (A) preparing a hydroxy-terminated polyester intermediate in a molten reaction mixture comprising at least one 1,3-dihydroxybenzene moiety and at least one aromatic dicarboxylic acid diarylester under transesterification conditions, said polyester intermediate having a degree of polymerization of at least 4; and (B) conducting a reaction of said polyester intermediate with a carbonate precursor in a two-phase system comprising an aqueous phase and a water-immiscible organic solvent. Articles comprising the copolyestercarbonates are another aspect of the invention.

Method for preparing copolyestercarbonates and articles therefrom

This disclosure relates to a method for producing and using catalysts in the production of bisphenols, and in particular to a method for producing catalysts which contain attached mercaptan promoters, and using these catalysts in the production of bisphenol-A and its derivatives.

Silylmethanethiols have been found to be useful promoters in the acid catalyzed condensation reaction between phenol and acetone to afford bisphenol A. Silylmethanethiols provide improvements in both the rate and selectivity of bisphenol A formation relative to known thiol promoters such as 3-mercaptopropionic acid or hexanethiol.

Silylmethanethiols as promoters for bisphenol production

The present invention provides a process for recovering a metal nitrite, e.g., sodium nitrite, from a reaction mixture formed from an aromatic displacement reaction such as the synthesis of an aromatic bis(ether phthalimide) in an organic non-polar solvent. The process comprises forming a reaction mixture from the synthesis of an aromatic bis(ether phthalimide) comprising a recoverable amount of metal nitrite; treating the reaction mixture with an amount of water effective to produce an aqueous solution phase of metal nitrite and an organic non-polar phase; and separating the aqueous solution phase of metal nitrite from the organic non-polar phase.

Process for recovering sodium nitrite

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Ballston Lake, NY, United States of America

Jimmy Lynn Webb