| Résumé : |
As a class of polymers, the polyurethanes are unsurpassed in their versatility, in that products are available covering a wide range of processing and property variations. They are produced today in considerably different physical states and possessing substantially dissimilar physical properties.
They can be divided into three broad classes consisting of foams, coating systems, and millable systems. The millable types can be further divided into groups as cross-linkable rubbers, and thermoplastic and thermosetting polymers. For adhesive and coating formulating, the thermoplastic types are most useful ; and it bas been our experience that the polyester urethanes give better adhesion than the polyether types. These polymers are compatible with a wide range of resins, making it possible to increase adhesion, abrasion, and plating or embossing properties. |
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Urethane polymers in leather finishing in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXX (Année 1975)
