AN ELASTOMERIC PRIMER FOR USE WITH EPDM ROOFING MEMBRANES

摘要

A roofing primer composition including a bromobutyl rubber, a polyurethane, wherein the polyurethane is the reaction product of a phenolic res in and an isocyanate having more than two functionalities, the polyurethane being formed in the presence of a catalyst, and a solvent, wherein the solvent is pref erably selected from the group consisting of parachlorobenzotrifluoride, 1-dodecene, toluene, hexane, heptane methylene chloride, 1,1,1-trichlorethane, xylene, metha nol, 1-tetradecene, chloroform, tetrachloro ethylene and ethanol. This primer composition exhibits improved adhesion during application, exhibits improved she lf life, is not water sensitive, and can contain a low volatile solvent.