Blended pressure-sensitive asphaltic based adhesives
AssigneeOwens-Corning Fiberglas Corporation
InventorsWilliam E. Uffner, Robert N. White, Edward R. Harrington
Life of this patent
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Abstract
A pressure-sensitive adhesive is disclosed which is prepared by hot melt blending paving grade asphalt, a depolymerized virgin rubber, a terpene resin, and a vulcanizable, non-depolymerized styrene-butadiene copolymer. These adhesives are especially useful in forming membranes by coating one side of an asphaltic based coated reinforcement with these adhesives. They are useful for highway repair and maintenance purposes and for waterproofing and show good adhesion to cementitious, for example asphaltic concrete or Portland cement concrete, substrates.
Claims2
A hot melt blended pressure sensitive adhesive having substantially no cold flow and the ability to stick to cementitious substrates substantially instantaneously upon contact at 40.degree. F., said adhesive consisting essentially of a paving grade asphalt, effective tacky amounts of a depolymerized virgin rubber having a molecular weight from about 10,000 to 110,000, effective viscosity depressing amounts of a terpene resin, and effective cold flow resisting amounts of a non-depolymerized styrene-butadiene copolymer.
Dependencies are inferred from the claim text.