Method of treating cellulose material with CO2 or source thereof
AssigneeCcm Research Limited
InventorPeter Hammond
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Abstract
The present invention relates to materials having improved and useful properties and to methods relating to the manufacture of said materials. In particular the present invention relates to a method of modifying the surface of a material, preferably a fibrous material, to enable carbon dioxide to be carried by the surface. The carbon dioxide may be bound to the surface in a reversible or irreversible manner. The method of treating the surface of a material comprises (a) contacting the surface of the material with a composition comprising an amino compound; and (b) contacting the surface of the material with a composition comprising carbon dioxide or a source thereof.
Claims12
A method of treating the surface of a material, the method comprising the steps of:
- (a) contacting the surface of the material with a composition comprising at least 40 wt % of ammonia;
- and
- (b) contacting the surface of the material with a composition comprising carbon dioxide having a pressure of between 150 kPa and 3000 kPa,
- wherein the material is a cellulosic material comprising natural fibers, and wherein the composition used in step (b) comprises neat carbon dioxide or further comprises a diluent or carrier.
A method of treating the surface of a material, the method comprising the steps of:
- (a) contacting the surface of the material with a composition comprising at least 40 wt % of an amino compound;
- and
- (b) contacting the surface of the material with a composition comprising carbon dioxide or a source thereof having a pressure of between 150 kPa and 3000 kPa,
- wherein the material is a cellulosic material comprising natural fibers, and wherein the composition used in step (b) comprises neat carbon dioxide or further comprises a diluent or carrier;
- and
- wherein step (b) comprises contacting the material with a composition comprising superheated water having dissolved therein carbon dioxide and one or more benefit agents, and wherein the deposition of the carbon dioxide and/or one or more benefit agents onto the surface of the material may be initiated by a drop in pressure and/or a drop in temperature and/or a change in pH.
Dependencies are inferred from the claim text.