Isocyanate free polymers and methods of their production

摘要

The invention relates to novel methods for producing isocyanate-free synthetic materials, such as plastics, polymers and/or modified polyurethanes, comprising melt extrusion processing of combinations of thermoplastic polyurethanes and nanoclays.

主权项

1. Method for isocyanate-free production of a synthetic material product I comprising
a) mixing thermoplastic polyurethane (TPU) and a nanoclay component comprising
i. mixing 70-90 wt % of the TPU with 10-30 wt % of the nanoclay component, wherein intermediate product Ia is produced, followed byii. mixing 90-99 wt % of the TPU with 0.1-10 wt % of the intermediate product Ia, wherein intermediate product I is produced, b) mixing 10-90% of the intermediate product I obtained from a) with 8-30 wt % of a polyol component, and optionally additional TPU, wherein intermediate product II is produced, c) mixing 50-70 wt % of the intermediate product II obtained from b) with 20-40 wt % polycarbonate (PC) and/or 6-18 wt % polycaprolactone component (PCL), wherein the synthetic material product I is produced, wherein one or more for said mixings in a) to c) occurs in a segmented single, twin or multiple screw melt extruder at melting temperatures between 80 and 300 degrees C. and wherein no isocyanate is produced in a) to c).