Abstract: A repair kit for use in preparing a polymeric composite material and methods for preparing the polymer composite material are described. The repair kit includes a sealed container and a first removable divider arranged transversely across the sealed container. The divider is configured to engage the sealed container to form a first compartment and a second compartment. The first compartment and the second compartment are isolated from one another when the first removable divider is engaged with the sealed container. The first compartment contains a resin component and the second compartment contains a reactive component. The sealed container is configured such that removal of the first removable divider enables mixing of the resin component and the reactive component within the sealed container. The repair kit may also include a second removable divider to form a third compartment. The repair kit may also include a catalyst and a filler.

Abstract: A method for restoring a damaged rail seat located on a concrete rail tie. The method comprises applying a polymeric material comprising a poly(urethane-urea) material to the damaged rail seat located on the concrete rail tie; and restoring the damaged rail seat by curing the polymeric material under ambient temperature and pressure conditions. The polymeric material is substantially sag resistant and maintains its shape without substantial runoff from the concrete rail tie during the restoring of the damage rail seat.

Abstract: A method for restoring a damaged rail seat located on a concrete rail tie. The method comprises applying a polymeric material comprising a poly(urethaneurea) material to the damaged rail seat located in the concrete rail tie; and restoring the damaged rail seat by cursing the polymeric material under ambient temperature and pressure conditions. The polymeric material is substantially sag resistant and maintains its shape without substantial runoff from the concrete rail tie during the restoring of the damage rail seat.

Abstract: Low unsaturation, high molecular weight polyols having an unsaturation level below or equal to 0.006 milli-equivalents per gram, and preferably below 0.004 milli-equivalents per gram, and molecular weights of greater than or equal to about 2,000, and preferably between about 2,000 and 10,000, are converted into low unsaturation, high molecular-weight (LUSHMW) polyamines directly by amination reactions. The LUSHMW polyamines produce polymers having elongation, modulus, and tensile characteristics that are substantially better than those of conventional analogous polymers.