Compostable and thermoplastic cellulose ether-2-hydroxycarboxylic acid esters and mixed esters
AssigneeWolff Walsrode AG
InventorsJoachim Simon, Hanns Peter Muller, Rainhard Koch, Dirk Jacques Dijkstra, Jurgen Engelhardt, Volkhard Muller
Life of this patent
Estimating the term…
Abstract
Thermoplastic and compostable cellulose ether esters with 2-hydroxycarboxylic acids as acid components and mixed esters which, in addition to 2-hydroxycarboxylic acid groups, have further mono-, dicarboxylic acid or carbamate groups.
Claims10
Thermoplastic, water-insoluble and fully compostable cellulose ether esters which can be described by the general structure ##STR3## wherein cell-O represents the substituted radical of a hydroxyl group on the cellulose chain, at least one of the groups A is a 2-hydroxycarboxylic acid having the structure (II) ##STR4## in which, D.sub.1 and D.sub.2 independently of one another stand for a hydrogen atom or a methyl or ethyl group, m stands for an integer from 1 to 10,
- at least one further group A is a monocarboxylic acid, a dicarboxylic acid or a carbamate group, and any remaining group A is hydrogen.
Thermoplastic, water-insoluble and fully compostable cellulose ether esters which can be described by the general structure ##STR5## wherein cell-O represents the substituted radical of a hydroxyl group on the cellulose chain, at least one of the groups A is a 2-hydroxycarboxylic acid having the structure (II). ##STR6## in which D.sub.1 and D.sub.2 independently of one another stand for a hydrogen atom or a methyl or ethyl group, m stands for an integer from 1 to 10,
- at least one of the groups A is a methyl, ethyl, benzyl, or cyanoethyl, and any remaining group A is hydrogen.
Dependencies are inferred from the claim text.