| 摘要 |
The production of blends from thermoplastic polyurethanes (TPU) and polylactides (PLA) is achieved by A) reacting at least one thermoplastic polyurethane with at least one diisocyanate or a diisocyanate prepolymer, which comprises at least two isocyanate groups, or a mixture thereof, in the melt 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 in the melt of the product from stage A) and reacting the product from stage A) with the polylactide at a temperature of less than 190ºC, and C) cooling the blend thus obtained, wherein no polyols are added in stages A) to C). |
