High Temperature GC Analysis of Waxes Used in Hot Melt Adhesives, 1990 Polymers, Laminations & Coatings Conference Proceedings
Waxes are an important component in many hot melt adhesive formulations. The performance of the wax in an adhesive is a function of its carbon number distribution and its ratio of normal paraffinic to isoparaffinic components. The availability of GC capillary columns and apparatus capable of operating at temperatures up to 45O degrees Celsius. allows for the resolution of the high carbon number species present in high melting point waxes. Peaks for wax components over carbon number of 100 are obtainable using modern columns and equipment. High temperature GC is a powerful tool available to the hot melt adhesive chemist for the characterization of the high melting point paraffin, microcrystalline, and synthetic waxes available to him. The paper describes some of the current methods, columns and apparatus. Both advantages and limitations of the current technology are discussed.