Unusual Effects of Some Zwitterion Compounds as Catalysts in Easy-Care Finishing 1

Abstract

Aminoalkanesulfonic acids and amino acids are internal organic salts or zwit terions. In pad-dry-cure processing to impart durable press properties to cellulosic fabrics, they may be used as catalysts. Aminomethanesutfonic acid (AMSA), in particular, is about as effective a catalyst as magnesium chloride. Because of its zwitterion structure, AMSA is unlike most sulfonic acids which produce durable press fabrics with high strength losses. Mixed catalysts of magnesium chloride and the zwitterions AMSA, taurine, or glycine can be employed with dimethylol dihy droxyethyleneurea to produce fabrics with a good combination of smooth drying appearance, wrinkle resistance, serviceable strength, and moderate formaldehyde release values.