Anionically dyeable smooth-dry crosslinked cellulosic material created by treatment of cellulose with non-reactive glycol ether swelling agents and nitrogen based compounds
AssigneeThe United States of America as represented by the Secretary of Agriculture
InventorsEugene J. Blanchard, Robert M. Reinhardt
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Abstract
Anionically dyeable smooth-dry crosslinked cellulose is produced by modifying cellulose-containing material with the combination of a hydroxyalkylamine or a hydroxyalkyl quaternary ammonium salt, a methylolamide crosslinking agent and one or more reactively inert glycol ether swelling agents. The reaction is typically catalyzed with salts such as zinc nitrate or magnesium chloride used either alone or in conjunction with citric acid. Types of usable anionic dyes include acid, direct, and reactive dyes. The cellulose-containing material may be in the form of fibers, threads, linters, roving, fabrics, yarns, slivers and paper.
Claims41
A crosslinked cellulosic reaction product consisting essentially of:
- a cellulosic substrate;
- a methylolamide crosslinking agent bound to said cellulose substrate;
- one or more of a hydroxyalkylamine or a hydroxyalkyl quaternary ammonium compound chemically bound to said methylolamide crosslinking agent and one or more reactively inert glycol ether swelling agents incorporated into the cellulosic substrate;
- wherein said cellulosic reaction product is prepared by crosslinking a cellulosic material after it has been thoroughly wetted in a treating bath comprising:
- about 3% to about 15% by weight of a methylolamide crosslinking agent, about 5% to about 40% by weight of one or more reactively inert glycol ether swelling agents, about 3% to about 15% by weight of one or more of a salt of a hydroxyalkylamine compound or a hydroxyalkyl quaternary ammonium salt, a catalyst present in an amount ranging from about 10% to about 60% by weight of said crosslinking agent which is capable of binding said methylolamide crosslinking agent to a cellulose substrate and binding said one or more of a hydroxyalkylamine from said salt of a hydroxyalkylamine compound, or a hydroxyalkyl quaternary ammonium compound from said hydroxyalkyl quaternary ammonium salt to said methylolamide crosslinking agent, and about 10% to about 90% by weight of an aqueous solvent.
A process comprising contacting a cellulosic substrate with:
- A composition consisting essentially of about 3% to about 15% by weight of a methylolamide crosslinking agent, about 5% to about 40% by weight of one or more reactively inert glycol ether swelling agents, about 3% to about 15% by weight of one or more of a salt of a hydroxyalkylamine compound or a hydroxyalkyl quaternary ammonium salt, a catalyst present in an amount ranging from about 10% to about 60% by weight of said crosslinking agent which catalyzes both the binding of said methylolamide crosslinking agent to said substrate and the binding of said one or more of a hydroxyalkylamine from said salt of a hydroxyalkylamine compound or a hydroxyalkyl quaternary ammonium compound from said hydroxyalkyl quaternary ammonium salt to said methylolamide crosslinking agent, and about 10% to about 90% by weight of an aqueous solvent;
- under conditions whereby said reactively inert glycol ether swelling agents become incorporated into the cellulosic substrate, said methylolamide crosslinking agent binds to said substrate, and one or more of said hydroxyalkylamine from said salt of a hydroxyalkylamine compound or said hydroxyalkyl quaternary ammonium compound from said hydroxalkyl quaternary ammonium salt, bind to said methylolamide to produce a crosslinked cellulose.
A composition consisting essentially of:
- about 3% to about 15% by weight of a methylolamide crosslinking agent, about 5% to about 40% by weight of one or more reactively inert glycol ether swelling agents, about 3% to about 15% by weight of one or more of a salt of a hydroxyalkylamine compound or a hydroxyalkyl quaternary ammonium salt, a catalyst present in an amount ranging from about 10% to about 60% by weight of said crosslinking agent which is capable of binding said methylolamide crosslinking agent to a cellulose substrate and binding said one or more of a hydroxyalkylamine from said salt of a hydroxyalkylamine compound, or a hydroxyalkyl quaternary ammonium compound from said hydroxyalkyl quaternary ammonium salt to said methylolamide crosslinking agent, and about 10% to about 90% by weight of an aqueous solvent.
Dependencies are inferred from the claim text.