Moderated Mineral Acid Catalysis for Durable-Press Finishing Under Mild-Curing Conditions 1
| Autor: | Russell M. H. Kullman, Robert M. Reinhardt |
|---|---|
| Rok vydání: | 1974 |
| Předmět: |
010302 applied physics
chemistry.chemical_classification Materials science Polymers and Plastics Durable press Mineral acid 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Catalysis chemistry.chemical_compound Chemical engineering chemistry Amide 0103 physical sciences Chemical Engineering (miscellaneous) Organic chemistry 0210 nano-technology Curing (chemistry) |
| Zdroj: | Textile Research Journal. 44:948-952 |
| ISSN: | 1746-7748 0040-5175 |
| DOI: | 10.1177/004051757404401206 |
| Popis: | Mineral acids are effective catalysts in mild-cure finishing treatments for producing wrinkle resistance in cotton fabrics. In these treatments fabrics are impregnated with a solution containing an N-methylolated amide crosslinking agent and the catalyst, and heated without predrying, at 60-100°C for a short time. The heating is regulated so that the moisture content of the fibers at the end of the crosslinking treatment is about 3-5%. However, because of the potentially corro sive effect on equipment and the precise control necessary during treatments that utilize mineral acid catalysts, other catalyst systems have been sought. The present approach has been to modify the activity of the mineral acid by in cluding a moderating salt in the catalyst system. Certain acid/salt combinations that provide sufficient catalytic activity for mild-cure finishing were developed. The catalyst systems used were HCl/NH4H2PO 4, HCl/NH4C2H3O2, and HNO 3/ NH4H2PO4. Treatments utilizing these catalysts gave fabrics with greater strength but lower wrinkle- and chlorine- resistance than those receiving treatments catalyzed by mineral acid alone. Magnitude of the changes varied with concentrations and relative amounts of acid and salt in the catalyst system; quantities for optimum relationships were established. |
| Databáze: | OpenAIRE |
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