Patent ID: 8419872
Filing Date: 2013-04-16
Classification: C08G,C08L,C09J,E04D

Abstract:
1. A method of adhering an interply roof membrane to another roof membrane or to a roof deck substrate comprising: a) applying a liquid cold applied adhesive to said roof membrane or said roof deck, said cold applied adhesive comprising a blend of a) polyurethane pre-polymer, b) petroleum liquid including one or more compounds selected from the group consisting of asphalt, modified asphalt, bitumen, modified bitumen, coal-tar, and modified coal tar; c) solvent, and d) additive, said additive including one or more compounds selected from the group consisting of adhesion enhancers, alumina trihydrate, biocides, cellulose fibers, calcium carbonate, chalk, clay, coloring agents, dolomite, fire retardants, fumed silica, metal flakes, mica, polymer, reinforced fibers, softening agent, surfactant, tackifying agent, talc, UV resistance agents, and water, and wherein a weight percent of said petroleum liquid in said blend is less than 50 weight percent, and wherein a weight percent of said polyurethane pre-polymer in said blend is less than 50 weight percent, and wherein a weight percent of said additive in said blend is less than 50 weight percent, and wherein a weight percent ratio of said petroleum liquid to said solvent is about 1.01-4:1, and wherein a weight ratio of said petroleum liquid to said polyurethane pre-polymer is about 0.4-2:1; and, b) applying said interply roof membrane to said roof membrane or said roof deck, said interply of roof membrane applied to said roof membrane or said roof deck prior to a complete curing of said polyurethane pre-polymer in said liquid cold applied adhesive.