Patent Title: METHOD FOR PREPARING THERMOPLASTIC POLYURETHANE PELLET

 Number/Link:  WO2016/055731  (French)

Applicant/Assignee: Roquette Freres

Publication date: 14-04-2016

“Gist”: Use of isosorbide as chain extender for TPU preparation

Why it is interesting: According to this invention the use of dianhydrohexitols as chain extender results in thermoplastic polyurethanes with improved overmoulding properties, notably improved colour, abrasion resistance and soft touch. In the examples TPUs prepared from 4,4’MDI, PTMEG 1000 and chain extended with isosorbide are compared to 1,4-butanediol extended TPUs. The isosorbide TPUs are softer with better abrasion resistance and -in my opinion surprisingly- have a somewhat brighter colour.

Isosorbide