Cellulose esters and their production in halogenated ionic liquids
AssigneeEastman Chemical Company
InventorsCharles Michael Buchanan, Norma Lindsey Buchanan
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Abstract
Ionic liquids and cellulose ester compositions and processes for producing ionic liquids and cellulose esters. Cellulose esters can be produced by esterifying cellulose in a reaction medium comprising one or more halide ionic liquids and at least one binary component. Cellulose esters prepared via the methods of the present invention can have a degree of substitution (“DS”) of at least 1.5 and can comprise a plurality of ester substituents, where at least 50 percent of the ester substituents comprise alkyl esters having a carbon chain length of at least 6 carbons.
Claims17
A composition comprising a cellulose ester having a degree of substitution (“DS”) of at least 1.5 and less than 3.0, wherein said cellulose ester comprises ester substituents, wherein at least 50 percent of said ester substituents comprise alkyl esters having a carbon chain length of at least 6 carbons;
- wherein said cellulose ester is a non-random cellulose ester, and further comprising an ionic liquid.
An esterified medium comprising an ionic liquid and a cellulose ester, wherein said cellulose ester has a degree of substitution (“DS”) of at least 1.5 and comprises ester substituents, wherein at least 50 percent of said ester substituents comprise alkyl esters having a carbon chain length of at least 6 carbons.
Dependencies are inferred from the claim text.