Abstract: A melter, mixer and applicator system for applying coating or sealing compositions is disclosed. A diesel engine provides the motive force necessary to operate many of the components of the system. A tank surrounded by an internal heating system is provided for melting a first material. An insulated cabinet is provided and heated from heat generated by the internal heating system. The plumbing configuration is disposed within the heated cabinet for mixing the material heated within the tank with an additional material fed to the plumbing configuration by a proportioner pump. The output of this mixture serves as one of the inputs to the applicator. The other input to the applicator is another material fed directly from the proportioner pump. The proportioner, preferably provides the two materials running through it in a predetermined ratio amount with respect to each other.

Abstract: The elastomeric polyurethane interpenetrating network compositions of the invention are developed by in situ reaction of polyols with different isocyanates and polyisocyanates in bituminous material. Suitable bituminous materials include asphalt, coal tar, polymer modified asphalt, oxidized, and unoxidized asphalt. The composition is preferably formed at a temperature between 200° F. and 350° F. The reaction kinetics can be accelerated by including catalysts and curing agents. The reaction kinetics were followed by measuring the torque increase as a function of reaction time. The gelation time is measured at the maximum torque. For testing, the bituminous polyurethane interpenetrating network elastomeric compositions were hot-sprayed-applied (200° F.-350° F.) on different substrates such as concrete, metal, wood, built-up roofing systems, polyurethane foams, and other construction materials with a specially designed spray applicator system.