| Résumé : |
Today the terms synthetic and natural fatliquoring agents are commonly used. But if you ask what synthetic fatliquoring agents are, you will get differing answers.
For many years fish oil, sperm oil, neat's-foot oil, castor oil and tallows were the main fatty raw materials used by the tanners. They were called, and I feel it is justified, natural fatliquoring agents. However, they are not used in their original form, but are chemically changed by sulfation, sulfitation, sulfonation, saponification, or ethoxylation to meet practical requirements.
These are just a few of many possible examples.
All these reactions are carried out to supply the tanner with fatliquoring agents which meet his requirements at reasonable prices. One could even say that raw materials should he chosen according to the economic situation. On account of the economic policy of the raw material countries bringing about a raw material shortage, suppliers of leather auxiliaries have to prepare from different raw ma-terials fatliquoring agents producing almost identical effects. |
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Accueil
Synthetic fatliquoring agents in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXI (Année 1976)
