AN ELASTOMERIC PRIMER FOR USE WITH EPDM ROOFING MEMBRANES
A roofing primer composition including a bromobutyl rubber, a polyurethane, wherein the polyurethane is the reaction product of a phenolic resin and an isocyanate having more than two functionalities, the polyurethane bei ng formed in the presence of a catalyst, and a solvent, wherein the solvent is...
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Format: | Patent |
Sprache: | eng ; fre |
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Zusammenfassung: | A roofing primer composition including a bromobutyl rubber, a polyurethane, wherein the polyurethane is the reaction product of a phenolic resin and an isocyanate having more than two functionalities, the polyurethane bei ng formed in the presence of a catalyst, and a solvent, wherein the solvent is preferably selected from the group consisting of parachlorobenzotrifluoride, 1-dodecene , toluene, hexane, heptane methylene chloride, 1,1,1-trichlorethane, xylene, methanol, 1-tetradecene, chloroform, tetrachloro ethylene and ethanol. This primer composition exhibits improved adhesion during application, exhibits improved shelf life, is not water sensitive, and can contain a low volatile solvent. |
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