REACTIVE THERMOPLASTIC POLYURETHANE BASED ON BLOCKED ISOCYANATES Russian patent published in 2022 - IPC C08G18/66 C08G18/12 C08G18/32 C08G18/48 C08G18/80 B23K26/00 

FIELD: additive technologies.

SUBSTANCE: present invention relates to the use of composition (Z1) for the production of a molded product by an additive technology method based on powders. Composition (Z1) contains thermoplastic polyurethane (TPU1) and chain extension agent (iii). Thermoplastic polyurethane is obtained by the interaction of at least one polyisocyanate composition (i) and at least one polyol composition containing polyester alcohol. The specified polyurethane is solid at least in a temperature range of less than 50°C and contains end groups selected from a group consisting of end groups (EG1) and end groups (EG2), wherein end groups (EG1) at temperature (T1) or, respectively, end groups (EG2) at temperature (T2) can split off to form reactive groups on thermoplastic polyurethane (TPU1), which can react with functional groups of thermoplastic polyurethane (TPU1) or another component of composition (Z1). Temperature (T1) and temperature (T2), respectively, are higher than or equal to 60°C.

EFFECT: present invention provides the possibility of producing improved materials than can be well processed and that make it possible to produce products with good mechanical properties.

9 cl, 6 dwg, 7 tbl, 3 ex