Part II: Formaldehyde-Curing after Amidoximation

Abstract

By amidoximation with the aqueous hydroxylamine and subsequent formaldehydecuring in the presence of a weak acid catalyst such as ammonium acetate or even in the absence of catalyst, the crease resistance of cyanoethylated cotton fabrics containing a low percentage of nitrogen was improved significantly without much loss in the tensile strength and elongation, but a decrease in the flex abrasion and tear strength occurred.From the results, it was deduced that the longer cross link chain might be formed to some extent between adjacent amidoxime or hydroxamic acid groups in different cellulose molecules. After curing, the amidoximates retain great affinities for acid dyes and have a wool-like hand.

Spectral and Thermal Analyses of a Novel Cellulose Derivative “Propionic Acid Hydrazide-3-(OCellulose)” and its Combination with Some Metal Ions

“…Modified cellulose can collect metal ions from solutions much more effectively than natural cellulose [2]. Therefore, attempts to attach carboxyl groups, phosphate and nitrogen and/or sulfur containing groups to the backbone of cellulose have been carried out by many authors [3 -131. Within the framework of preparation the cellulose derivative containing nitrogen, the numerous procedures were discovered, including cyanoethylation of cellulose [4], amidoximation and carbamylethylation of cyanoethylated cellulose [5,6 and 141, nitration of carboxymethyl cellulose ether [ 151, graft polymerization with nitrogen containing monomer, e.g., acrylonitrile and acrylamide [ 16 -181, and chemical introduction of organic amines to cellulose via 6-chloro-6-deoxycellulose or 2,3-Dibromopropyl cellulose [ 19 -2 11.…”

Cross-Linking of Partially Cyanoethylated Cotton

“…at room temperature in the following three kinds of solutions containing 12r+ formaldehyde which were prepared from a commercial grade formaline. 1 taiteotislv, one part was' only washed with water and another was successively scoured hy O,5(';{ hy-(ir(whl()ric acid ( 20&dquo; C.. 10 min., and 180 liquor&dquo; ratio) and rewashed thoroughly with water. The former gave 3.34~ X and a slight yellowish hlue ciiscoloration ; the latter gave 3.26'jr N and hardly any discoloration.…”