Eastman Chemical Company

Michael Orlando Malcolm

Charles Michael Buchanan

Matthew Davie Wood

Norma Lindsey Buchanan

Jessica Dee Posey-Dowty

Juanelle Little Lambert

Chung-Ming Kuo

Thelma Lee Watterson

Margaretha Soderqvist Lindblad

Susan Northrop Carty

Mary Kathleen Moore

John Steele Debenham

This invention provides cellulose ester interpolymers, and methods of oxidizing cellulose interpolymers and cellulose ester interpolymers. The invention also provides routes to access carboxylated cellulose ester derivatives with high acid numbers wherein the carboxyl group is attached directly to the cellulose backbone by a carbon-carbon bond. Through functionalization of an intermediate aldehyde, the corresponding cationic or zwitterionic cellulose ester derivatives can also be accessed. The interpolymers of the present invention have a number of end-use applications, for example, as binder resins in various types of coating compositions and as drug delivery agents.

Cellulose interpolymers and method of oxidation

Cellulose interpolymers and methods of oxidation

The present invention provides chemical processes for the preparation of disaccharide and trisaccharide C to C fatty acid esters having a high alpha content. Yet still further, the invention provides materials prepared by the processes disclosed herein.

Methods of preparing disaccharide and trisaccharide C6-C12 fatty acid esters with high alpha content and materials therefrom

A laminar flow process for preparing cellulose diacetate fibers is disclosed. In the process, a precipitation-acid stream and an acid-dope stream are contacted in a zone having substantially laminar flow. The acid-dope stream is annularly disposed within and flows in the same direction as the precipitation-acid stream. The precipitation-acid stream has a temperature of 100.degree. to 200.degree. F. and comprises 25 to 35 percent by weight acetic acid and 75 to 65 percent by weight water. The acid-dope stream has a temperature in the range of 100.degree. to 200.degree. F. and comprised of 5 to 22 weight percent of cellulose diacetate having an inherent viscosity of at least 1.0, and 95 to 78 percent by weight of a mixture comprising 65 to 90 weight percent acetic acid and 35 to 10 weight percent water. The precipitation-acid stream has a linear flow greater than or equal to the linear flow of the acid-dope stream. The weight ratio of the precipitation-acid stream to the acid-dope stream is at least 9:1. Contacting the two streams in this manner causes precipitation of cellulose diacetate fibers of predictable diameter as the two streams diffuse together.

Laminar flow process of preparing cellulose diacetate fibers

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Kingsport, TN, United States of America

Michael Orlando Malcolm