公开(公告)号：US12215183B2

公开(公告)日：2025-02-04

申请号：US16349339

申请日：2017-11-13

Applicant: BASF SE

Inventor： Peter Gutmann ,  Elmar Poeselt ,  Hye Jin Park ,  Uwe Keppeler ,  Lutz-Peter Hoenemann

IPC: C08G18/48 ,  B29C48/05 ,  B29C48/345 ,  B29C48/37 ,  B29C48/92 ,  C08G18/12 ,  C08G18/66 ,  C08G18/76 ,  C08G18/80 ,  C08J9/18 ,  C08K3/36 ,  C08L75/06 ,  C08L75/08 ,  B29C48/00 ,  B29C48/04

Abstract: Disclosed herein are expanded thermoplastic polyurethane beads polymerized from an isocyanate, an isocyanate-reactive compound having a molecular weight between 500 and 10 000 g/mol and a chain extender, wherein customary adjuvants may be additionally present, and the thermoplastic polyurethane has a hard phase fraction ranging from 0.1 to 0.95 and the hard phase fraction is defined by: Hard ⁢ ⁢ phase ⁢ ⁢ fraction = ∑ x = 1 k ⁢ ( ( m KVx M KV x ) · M Iso + m KVx ) m ges where MKVx represents a molar mass of chain extender x in g/mol, mKVx represents a mass of chain extender x in g, MIxo represents a molar mass of isocyanate in g/mol, mges represents a total mass of all starting materials without adjuvants, and k represents a number of chain extenders. Also disclosed herein are processes for producing expanded thermoplastic polyurethanes and processes for producing molded parts therefrom.