Eastman Chemical Company

Eastman-kodak Company

Eric Gray Olsen

Winston J Jackson, Jr

Lanney Calvin Treece

Max Lamar Carroll, Jr

Michael Paul Ekart

Gregory Wayne Nelson

Clinton Cherry

The present invention relates to an apparatus and method for producing molded polyester articles. More particularly, the invention concerns an apparatus and method for continuously producing molded polyester articles having low acetaldehyde content from a melt prepared by continuously reacting polyester precursors. The polyester is prepared and formed into useful shaped articles in a single, integrated, continuous melt-to-mold process without an intermediate solidification of the melt.

Apparatus and method for molding of polyester articles directly from a

A process for producing polyester articles, which generates little or no polyester waste. The process provides esterification or transesterification of one or more dicarboxylic acids or their dialkyl esters, polycondensation to produce a high molecular weight polyester, and molding or shaping of the polyester for produce the desired product. Scrap produced during the molding process is recycled back to the esterification or transesterification or polycondensation portion of the process. Optionally, the scrap may also be recycled to intermediate steps prior to the molding operation.

Process for continuously producing polyester articles with scrap recycle

Disclosed is a process for removing acetaldehyde from polyester which comprises the steps of

Process for producing polyester articles having low acetaldehyde content

This invention relates to a process for the preparation of thermoplastic polymers. Specifically it relates to a process for the preparation of a substantially linear, high molecular weight phenoxy resin from substituted hydroquinone, less than 80 mole percent of hydroquinone and optionally up to about 20 mole percent of a second aromatic diol, epichlorohydrin (or another epihalohydrin) and a base, such as sodium hydroxide. Hydroquinone phenoxy resins of this invention are characterized by low permeability to oxygen and carbon dioxide and are, therefore, useful as a gas-barrier layer in multilayer plastic film constructions used in food packaging and beverage bottle applications, for example. For use in such applications, the resin is generally in the form of a thin, uniform film prepared by extrusion, casting, or other such method. It is highly desirable that polymers used in this manner be as free as possible from chain branches or cross-links, as these lead to the formation of gel particles which cause imperfections in the polymer film. These imperfections, in turn, detract from the appearance of the film. Moreover, as is well known, increasing the amount of chain branching in a polymer results in an undesirable reduction of flexibility and toughness.

Linear hydroquinone phenoxy polymers and process

This invention relates to a process for the preparation of thermoplastic polymers. Specifically it relates to a process for the preparation of a substantially linear, high molecular weight phenoxy resin from hydroquinone, optionally up to about 20 mole percent of a second aromatic diol, epichlorohydrin (or another epihalohydrin) and a base, such as sodium hydroxide. Hydroquinone phenoxy resin is characterized by low permeability to oxygen and carbon dioxide and is, therefore, useful as a gas-barrier layer in multilayer plastic film constructions used in food-packaging and beverage bottle applications, for example. For use in such applications, the resin is generally in the form of a thin, uniform film prepared by extrusion, casting, or other such method. It is highly desirable that polymers used in this manner be as free as possible from chain branches or crosslinks, as these lead to the formation of gel particles which cause imperfections in the polymer film. These imperfections, in turn, detract from the appearance of the film. Moreover, as is well known, increasing the amount of chain branching in a polymer results in a undesirable reduction of flexibility and toughness.

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Kingsport, TN, United States of America

Eric Gray Olsen