Eastman Chemical Company

Douglas C Hoffman

Thomas Joseph Pecorini

Wesley Raymond Hale

James Palmer Dickerson

Kevin Wayne McCreight

Charles Michael Buchanan

Scott Ellery George

Alan W White

John C Hubbs

Robert M Gardner

Joseph Alexander Deloach

Steven C Gedon

Marti N Harrison

Joseph A DeLoach

New compositions for forming films for use in optical devices are provided. The compositions comprise a cellulose and a crosslinking agent dissolved or dispersed in a solvent system. Preferred celluloses are cellulose esters such as cellulose acetates, cellulose triacetates, cellulose acetate phthalates, and cellulose acetate butyrates. Preferred crosslinking agents are triazines such as those derived from melamine and benzoguanamine. The inventive compositions can be used to form, for example, protective and/or compensation films for use in polarizing plates.

Crosslinkable, cellulose ester compositions and films formed therefrom

This invention relates to a molded object prepared from a copolyester having an inherent viscosity of 0.4 to 1.1 dL/g,

Poly(cyclohexylenedimethylene terephthalate) copolyester molding

The present invention relates to a process comprising solid state polymerizing an immiscible polyester blend which has not been substantially melt esterified under conditions sufficient to produce a polyester blend which when remelted becomes clear. Polyester blends having improved I.V., color and low acetaldehyde are also disclosed.

Process for preparing blends of poly(ethylene terephthalate) and

Polyester molding compositions

Novel poly(3-hydroxyalkanoates), such as poly(3-hydroxybutyrate), and blends of these with other polymers are disclosed. A novel process for producing these poly(3-hydroxyalkanoates) is also disclosed which entails polymerizing one or more .beta.-substituted-.beta.-propiolactone(s) under polymerization conditions in the substantial absence of water in the presence of an anionic initiator.

Biodegradable poly (3-Hydroxyalkanoate) compositions and blends

The present invention relates to a process for preparing copolyesters which involves two steps. The first step is a diol interchange step, and the second step is a polycondensation step. More specifically, the process involves (I) reacting in the presence of a polycondensation catalyst a dihydroxy terephthalate-containing compound having the formula: ##STR1## wherein n is 1 to 10 and at least 99% of the endgroups are ethylene glycol moieties; and 0.01 to 10 moles, based on moles of the dihydroxy terephthalate-containing compound, of a diol, and (II) polycondensing the reaction product of Step (I) to form a copolyester while excess diol is removed until desired molecular weight is obtained. This process does not include a transesterification of a dialkyl ester reaction or an esterification reaction which are usually used to produce copolyesters. Moreover, this process allows for polyethylene terephthalate and copolyesters prepared therefrom to be produced on an integrated production line.

Process for preparing copolyesters

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Kingsport, TN, United States of America

Douglas C Hoffman