Abstract
Cellulosic material is treated with formulations containing 14.5% (w/w) glyoxal (40%) as a nonformaldehyde crosslinking agent in order to impart durable press properties. MgCl 2 · 6 H2O and Al2(SO4)3 · 16 H2O are applied as catalysts and different hydroxy carboxylic acids (citric, tartaric, and malic acids) as co-catalysts. The amount of cotton- bound glyoxal is measured by means of isocratic HPLC using HPX-87H as a stationary phase. Prior to chromatographic analysis, the cotton-bound glyoxal is converted to glycolate by means of an internal Cannizzaro reaction. The results indicate that MgCl2 · 6 H2O possesses lower effectiveness in comparison to Al2(SO4)3 · 16 H2O. A reduction of the cure temperature from 150 to 110°C does not influence the portion of glyoxal that has reacted with the cellulose when citric, tartaric, or malic acids are added to the formulations as co-catalysts.
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