process for producing mixtures made of thermoplastic polylactides and polyurethanes, blend made of thermoplastic polylactides and polyurethanes, use of blends, sheet product or molding, reinforced fiber composite material, and, sheet product, molding or semi-finished product

摘要

A process for producing blends made of thermoplastic polylactides and polyurethanes, blending made of thermoplastic polylactides and polyurethanes, use of blends, sheet product or molding, reinforced fiber composite material, and sheet product, molding or semi-finished product. The production of mixtures of thermoplastic polyurethanes (tpu) and polylactides (pla) is achieved by a) reacting at least one thermoplastic polyurethane with at least one diisocyanate or diisocyanate prepolymer comprising at least two isocyanate groups, or a mixture thereof, by melting by reducing the molecular weight of the thermoplastic polyurethane and forming a thermoplastic polyurethane having an excess of isocyanate end groups, b) introducing at least one polylactide into the fusion of the stage a product and reacting the stage a product with the polylactide at a temperature of less than 190 ° c, and c) cool the mixture thus obtained, wherein no polyol is added at stages a) to c).