Low density polyurethane integral lining foam system prepared using expandable microspheres and water as a costing agent

摘要

Liquid polyurethane reactive system for the production of footwear products with integral lining, comprising at least one polyol to be reacted with at least one MDI-based isocyanate prepolymer, an expanding agent that is water, additives including catalyst and expandable microspheres, characterized in that the amount of expandable microspheres is within the range of 1.0% to 30% 5 by weight with respect to the weight of said polyol and additives and the amount of water is within the range of 0.5% at 3.5% by weight with respect to the weight of said polyol and additives, said at least one polyol of adipic polyester resins being selected and said at least one isocyanate prepolymer has an NCO functionality within the range of from 2.0 to 2 , 05.