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DEVELOPMENT OF OLEFIN BLOCK COPOLYMERS FOR PRESSURE SENSITIVE ADHESIVES [2007]

C. Li Pi Shan, S. Yalvac, C. Diehl, G. Marchand, C. Rickey, T. Karjala
The Dow Chemical Co., Specialty Plastics and Elastomers R&D, Freeport, TX

T. Carvagno, P.M. Dunckley, L. Germinario
Eastman Chemical Company, Kingsport, TN

Over the past 10 years, polyolefin-based elastomers have found opportunities in hot melt adhesives and non-woven construction adhesives. For hot melt adhesives, low viscosity metallocene copolymers offer superior stability, better processability, low color and odor, better adhesion, and better economics in terms of mileage and lower maintenance cost over the incumbent polymers such as ethylene vinyl acetate (EVA). However, one deficiency has been the balance of softness and high temperature resistance for adhesion over the broad window of temperatures required for pressure sensitive adhesive applications.