Patent ID: 8715778
Filing Date: 2014-05-06
Classification: C08G,E01B,E01C,E02B

Abstract:
1. A process for the production of ballast for railway track laying and road construction and dike systems, said ballast comprising a polyurethane foam and ballast stones, said process comprising: 1) spreading out ballast stones, 2) applying a polyurethane foam forming reaction mixture between the spread out ballast stones, wherein the polyurethane foam forming reaction mixture consists of: wherein said polyurethane is formed by the reaction of a) with b) in the presence of c) and d) and optionally in the presence of e), f), and g), wherein the isocyanate index of the polyurethane foam forming reaction mixture ranges from 70 to 130, and wherein said polyurethane foam has a compression set of less than or equal to 0.01%, according to DIN EN ISO 1856; 40%, 5 min., 25° C.