Patent ID: 7893143
Filing Date: 2011-02-22
Classification: C08G

Abstract:
1. A one-shot process for the preparation of thermoplastically processable polyurethane elastomers (TPU) having self-extinguishing properties, comprising reacting A) at least one organic diisocyanate with B) at least one polyol having on average at least 1.8 and at most 3.0 Zerewitinoff-active hydrogen atoms and a number-average molecular weight C) at least one low molecular weight polyol or polyamine having on average at least 1.8 and at most 3.0 Zerewitinoff-active hydrogen atoms and a number-average molecular weight D) at least one organic phosphorus-containing compound based on phosphine oxide having on average at least 1,5 and at most 3.0 Zerewitinoff-active hydrogen atoms and a number-average molecular weight wherein R R F) further flameproofing agents which contain no Zerewitinoff-active hydrogen atoms, in an amount of from about 0 to about 70 wt. %, based on the total amount of TPU, and G) about 0 to about 20 wt. %, based on the total amount of TPU, of further auxiliary substances and additives, wherein the characteristic number (formed from the ratio of equivalents, multiplied by 100, of the isocyanate groups from (A) and the sum of the Zerewitinoff-active hydrogen atoms of the compounds (B), (C) and (D)) is 85 to 120.