Process for producing a crosslinked cellulose ether
AssigneeDow Global Technologies LLC
InventorsAlexandra Hild, Jöerg Neubauer, Sonja Menz, Matthias Sprehe, Michael Schreck
Life of this patent
Estimating the term…
Abstract
A process for producing a crosslinked cellulose ether including the steps of (i) contacting at least one cellulose material with a mixture comprising (ia) at least one crosslinking agent and (ib) at least one alkalization reagent to form an activated cellulose material; and (ii) contacting the activated cellulose material of step (i) with at least one etherification reagent; wherein the at least one etherification reagent reacts with the activated cellulose material to form the crosslinked cellulose ether; and a crosslinked cellulose ether produced by the above process.
Claims10
A process for producing a crosslinked cellulose ether comprising the steps of:
- (i) contacting at least one cellulose material with a mixture comprising (ia) at least one crosslinking agent and (ib) at least one alkalization reagent to form an activated cellulose material;
- and
- (ii) contacting the activated cellulose material of step (i) with at least one etherification reagent;
- wherein the at least one etherification reagent reacts with the activated cellulose material to form the crosslinked cellulose ether;
- wherein the at least one crosslinking agent is a diglycidyl ether type crosslinking agent having the following chemical Structure (I):
- wherein n is selected from 3 to 25;
- and wherein the crosslinked cellulose ether is a water soluble crosslinked cellulose ether.
A process for producing a crosslinked cellulose ether comprising the steps of:
- (A) mixing (a) at least one crosslinking agent with (b) at least one alkalization reagent to form a crosslinking agent/alkalization reagent mixture;
- (B) contacting at least one cellulose material with the mixture of step (A) to form an activated cellulose material;
- and
- (C) contacting the activated cellulose material of step (B) with at least one etherification reagent;
- wherein the at least one etherification reagent reacts with the activated cellulose material to form the crosslinked cellulose ether,
- wherein the at least one crosslinking agent is a diglycidyl ether type crosslinking agent having the following chemical Structure (I):
- wherein n is selected from 3 to 25;
- and wherein the crosslinked cellulose ether is a water soluble crosslinked cellulose ether.
Dependencies are inferred from the claim text.