Abstract: The present invention provides processes for infrastructure repairs and geo-stabilization with a low-exotherm polyurethane foam, grout or elastomer. The inventive process involves at least partially filling a cavity in the infrastructure or earth with a low-exotherm polyurethane foam, grout or elastomer made from at least one polyisocyanate, at least one isocyanate-reactive compound and an organic particulate material capable of absorbing heat, optionally in the presence of one or more chosen from water, surfactants, pigments, catalysts, alkali silicates and fillers and curing the polyurethane foam, grout or elastomer. The inventive processes may improve the repair of buildings, foundations, roads, bridges, highways, sidewalks, tunnels, manholes, sewers, sewage treatment systems, water treatment systems, reservoirs, canals, irrigation ditches, etc.

Abstract: The present invention provides processes for damp proofing and/or waterproofing structures by the adhesion of a thin thermoplastic polyurethane (TPU) membrane to a belowgrade surface structure. The inventive processes may find application in the damp proofing and/or waterproofing of belowgrade structures such as building foundations and basements, reservoirs, ornamental pools, ponds, plaza decks, parking decks, walkways, tunnels, earthen shelters, bridge abutments, retaining walls, landfills and water/chemical canals.

Abstract: The present invention provides processes for damp proofing and waterproofing structures by the adhesion of a thin thermoplastic polyurethane (TPU) membrane to a belowgrade surface structure. The inventive processes may find application in the damp proofing and waterproofing of belowgrade structures such as building foundations and basements, reservoirs, ornamental pools, ponds, plaza decks, parking decks, walkways, tunnels, earthen shelters, bridge abutments, retaining walls, landfills and water/chemical canals, and may greatly reduce or even prevent the ingress of water and the concomitant entry of waterborne molds, fungi, salts and other pollutants such as pesticides and radon into those structures.

Abstract: Rigid foams which possess urethane groups are prepared by reacting polyisocyanates with compounds which possess at least two active hydrogen atoms which are reactive towards isocyanate groups, in the presence of water and alkanes as blowing agent and solution promoters. The solution promoter used is a compound with a polar group.

Abstract: Rigid polyurethane foams are prepared by the reaction of1) polyisocyanates with2) compounds of a molecular weight of from 150 to 1500, having at least two hydrogen atoms active towards isocyanates and which one tertiary nitrogen atom in the molecule, in the presence of3) hydrofluoroalkanes as foaming agents as well as optionally in the presence of4) other auxiliary substances and additives known per se.

Abstract: In devices for the production of a reaction mixture, which forms a foamed plastic, from at least two reaction components and a foaming agent, it is possible to determine the content of foaming agent in a reaction component mixed therewith in that an intermediate container is provided for this mixture. The intermediate container is provided with a circulating line in which are arranged a circulating pump and a temperature-compensating viscometer. Optionally, the foaming agent content can be automatically adjusted to the theoretical value via a computer and pulse lines by influencing the drive means of the dosing pumps for the respective reaction component and the foaming agent.