General Electric Company

Sabic Innovative Plastics IP B.v.

Sabic Global Technolgoies B.v.

David Winfield Woodruff

Norman Enoch Johnson

Thomas Link Guggenheim

Farid Fouad Khouri

Daniel Joseph Brunelle

Ganesh Kailasam

Paul William Buckley

David Bruce Hall

Paul Edward Howson

Bangalore Aswatha Nagaraj

James Manio Silva

Minyoung Lee

Peter David Phelps

Lawrence E Szala

Norberto Silvi

James F Fleischer

Mark Howard Giammattei

D Sangeeta

Pradeep Jeevaji Nadkarni

Elliott West Shanklin

Clifford L Spiro

Albert Santo Stella

Raul Eduardo Ayala

Amy Rene Freshour

Paul Russell Wilson

Jan Peter Keulen

Matthew Hal Littlejohn

Lioba Maria Kloppenburg

Juan Justino Rodriguez Ordonez

Beatriz Penalver Bernabe

Joan M Redwing

Daniel Scott McAtee

Thomas R Anthony

Sterling B Brown

Dwain M White

Thomas Joseph Fyvie

Viswanathan Kalyanaraman

John Yupeng Gui

Philip G Kosky

Margaret Louise Blohm

Robert D Lillquist

Sergei Kniajanski

Suresh R Sriram

Erik O Einset

Havva Yagci Acar

Lee Harris Bergman

Juan Rodriguez Ordonez

Jacob Lee Oberholtzer

Rony A Sanchez-Martinez

Barbara Ellen Miebach

Thomas Joseph Fyve

Viswanathan Kalayaraman

Paul Howson

Thomas R Fnthony

Donald Owens

Donald E Iii Owens

Beatrice Penalver Bernabe

Different methods for the preparation of high purity NaAlClare disclosed. The methods includes charging a feed having an intimate mixture of aluminum chloride, sodium chloride, and aluminum metal, to a reactor at an initial temperature less than about 80&#xb0; C., carrying out a solid state reaction to form a solid NaAlClat an intermediate temperature less than about 145&#xb0; C., melting the formed solid NaAlClat an elevated temperature greater than about 150&#xb0; C. to produce molten phase NaAlCl, holding the reactor at a raised temperature greater than about 165&#xb0; C. to substantially complete formation of colorless NaAlCland filtering the reactor contents at a final temperature greater than about 165&#xb0; C.

Method for preparing sodium chloro-aluminate

A process for making ultra-fine particles of a high performance polymer in a yield greater than 90%, which includes dissolving the high performance polymer in an organic solvent capable of dissolving the polymer to form a solution; emulsifying the solution by combining the solution with water and a surfactant to form an emulsion; transferring the emulsion into a receiving water containing a surfactant to remove the organic solvent and form a slurry; and recovering particles of less than 75 microns in diameter in a yield greater than 90%.

Optimized emulsion drying process for making micronized polyetherimide polymers

A method for the purification of aromatic polyether polymers prepared by a halide displacement polymerization process comprises adsorbing the catalyst with an alkali metal halide to form an adsorbent component and then removing the adsorbent component. Mixtures resulting from this method are also discussed.

Mixtures resulting from methods for purification of polyether polymers

Bis(halophthalimides) are prepared in mixture in an organic liquid such as ortho-dichlorobenzene or anisole, by a reaction at a temperature of at least 150&#xb0; C. between at least one diamine compound and at least one halophthalic anhydride in the presence of imidization catalyst. The reaction mixture is maintained at about 15% by weight solids content and rich in the halophthalic anhydride by constantly monitoring the reaction mixture using analytical methods such as high performance liquid chromatography. The product mixture may be directly employed in the direct preparation of polyetherimides, and similar slurries may be employed to prepare other polyether polymers.

Method to prepare bis(haloimides)

Method for purification of polyether polymers and mixtures resulting therefrom

A method for preparing a metal salt of a hydroxy-substituted aromatic compound is described. The method comprises contacting in an aqueous medium at least one hydroxy-substituted aromatic compound with a base comprising a metal cation to provide a mixture comprising water and a metal salt of said hydroxy-substituted aromatic compound. The aqueous metal salt is then contacted with a substantially water-immiscible solvent at a temperature greater than the boiling point of water at the prevailing pressure to provide a slurry comprising the metal salt of the hydroxy-substituted aromatic compound and a vapor stream comprising the water-immiscible solvent and water. The components of the vapor stream are separated using a vapor handling system comprising a partial reflux condenser to provide a water-rich component and a water immiscible solvent-rich component.

Method for preparation of salts of hydroxy-substituted aromatic compounds

Method of forming a dry quaternary ammonium salt mixture

Polyether polymers, such as polyetherimides, are prepared by the reaction of a dihydroxy-substituted aromatic hydrocarbon alkali metal salt, such as bisphenol A disodium salt, with a bis(N-(chlorophthalimido))aromatic compound, such as 1,3- and/or 1,4-bis(N-(4-chlorophthalimido))benzene, in a solvent such as o-dichlorobenzene and in the presence of a phase transfer catalyst such as a hexaalkylguanidinium chloride. Several embodiments may be employed to improve the method. They comprise employing substantially dry reagents, employing a high solids level in solvent, beginning with an excess of bis(N-(chlorophthalimido))-aromatic compound and incrementally adding alkali metal salt, employing alkali metal salt of small particle size, and using reagents of high purity.

Phase transfer catalyzed method for preparation of polyetherimides

A method of making a polyether polymer comprises reacting a salt of a dihydroxy-substituted aromatic hydrocarbon with a substituted aromatic compound of formula (I)Z(A&#x2014;X)&#x2003;&#x2003;(I)in the presence of a catalyst to form an intermediate polymer having endgroups, wherein the molar ratio of the salt of a dihydroxy-substituted aromatic hydrocarbon to the substituted aromatic compound is less than 1, Z is an activating radical, Ais an aromatic radical and Xis fluoro, chloro, bromo or nitro; determining the additional amount of the salt of a dihydroxy-substituted aromatic hydrocarbon needed to form a final polyether polymer with a predetermined molecular weight and adding the additional amount of the salt of a dihydroxy-substituted aromatic hydrocarbon to the intermediate polymer.

Method for producing polyether polymers

A method of separating a polymer-solvent mixture is described wherein a polymer-solvent mixture is heated prior to its introduction into an extruder comprising an upstream vent and/or a side feeder vent to allow flash evaporation of the solvent, and downstream vents for removal of remaining solvent. The one-step method is highly efficient having very high throughput rates while at the same time providing a polymer product containing low levels of residual solvent.

Method of separating a polymer from a solvent

Disclosed is a method for preparing an alkali metal salt of a hydroxy-substituted hydrocarbon which comprises the steps of (i) contacting in solvent media at least one hydroxy-substituted hydrocarbon with a base comprising an alkali metal cation; and (ii) devolatilizing the solvent media comprising alkali metal salt by adding or spraying the solvent media into a substantially water-immiscible organic solvent, said solvent being at a temperature greater than the boiling point of solvent media at the prevailing pressure. In one embodiment the solvent media comprises water, and optionally at least one water-soluble protic organic solvent.

Method for making salts hydroxy-substituted hydrocarbons

Aromatic polyethers are prepared by displacement polymerization reaction in the presence of a water-immiscible solvent with boiling point at atmospheric pressure of greater than 110&deg; C. and a density ratio to water of greater than 1.1:1 at 20-25&deg; C. The polyethers are purified by processes comprising aqueous extraction, or filtration, or a combination thereof.

Method for purification of aromatic polyethers

Aromatic polyethers are prepared by displacement polymerization reaction in the presence of a water-immiscible solvent with density ratio to water in a range of between about 0.9:1 and about 1.1:1 measured at a temperature in a range of between about 20&deg; C. and about 25&deg; C. The polyethers are purified by processes comprising aqueous extraction, or filtration, or a combination thereof.

An improved thermal barrier coating for metal substrates such as superalloys is disclosed. The coating is a slurry composition, comprising spheres of zirconia, at least some of which are hollow, contained within a porous oxide matrix, such as aluminosilicate. The slurry composition can be applied by slurry casting or similar techniques to the desired surface. Coating methods are also described. In general, they involve the application of successive layers of variations of the slurry composition, with various curing techniques used between layers and after the final coating is applied. Another embodiment of this invention embraces a composite coating, comprising (i) an oxide matrix phase; (ii) zirconia spheres embedded in the oxide matrix; and (iii) a porous phase.

Coating composition for metal-based substrates, and related processes

Growing community of inventors

Saratoga Springs, NY, United States of America

David Winfield Woodruff