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US 5,205,836 AGranted
Formaldehyde-free textile finish
AssigneeBurlington Industries, Inc.
InventorsJohn H. Hansen, Phillip H. Riggins
Life of this patent
Estimating the term…
Abstract
Durable press finishes are applied to cellulosic materials such as cotton by cross-linking a polycarboxylic acid within the cellulosic fibers using a cyanamide compound cross-linker devoid of phosphorus. Wrinkle-resistant, durable cellulosic materials free from formaldehyde odor result.
Claims7
A process for treating and imparting durable wrinkle resistance to a cellulosic fibrous material, comprising the steps of:
- (a) impregnating a cellulosic material with a treating solution containing a polycarboxylic acid selected from the group consisting of citric acid, tricarballylic acid, trans-aconitic acid, 1,2,3,4-butanetetracarboxylic acid, all-cis-1,2,3,4-cyclopentanetetracarboxylic acid, mellitic acid, oxydisuccinic acid and thiodisuccinic acid and a catalytic amount of a cyanamide compound selected from cyanamide or a compound of the formula ##STR2## where R.sup.1 is NH, oxygen or sulfur, and R.sup.2 is CN or H, the polycarboxylic acid esterifying with the hydroxyl groups of the cellulosic material in the presence of the cyanamide catalyst;
- and
- (b) heating the material treated in step (a) to esterify and cross-link the cellulose with the polycarboxylic acid in the material.
Dependencies are inferred from the claim text.