Method of setting, resetting and protecting poles in the ground with foam polyurethane resins

摘要

An improvement in the known method of setting or resetting poles in the ground or ground line treatment or ecapsulation of pole treatment chemicals in the ground and enhancement of the strength, density, ratio of foam polyurethane resins formed in-situ from polyisocyanate and resin reactive therewith. Ground water and detrimental natural soil chemicals are often encountered in pole setting and affect polyurethane foam formation by undesirably reacting with the polyurethane to give a foam of insufficient density and strength. This improvement comprises adding to a non-volitale water-immiscible material, catalyst and a non-halogenated blowing agent by the normal polyurethane components. This composition decreases the cost per unit of the polyurethane foam. There is also the method for the addition to the polyurethane composition of various repellant materials and preservative agents for the pole.