Title: THERMOPLASTIC POLYURETHANE FOR SEAL APPLICATIONS

 Number/Link:WO2015/090916 (German)

Applicant/Assignee: Carl Freudenberg

Publication date: 25-06-2015

“Gist”: TPU based on blend of a polyester- polyether- and polycarbonate diols has exceptional properties

Why it is interesting: According to this application, TPUs prepared from blends of polyether, polyester and polycarbonate diols, result in materials with very high hydrolysis resistance, mechanical properties, high- ánd low temperature resistance and with excellent processing properties. In the examples 2000 MW polyether-, polycarbonate- and polycaprolactone diols are blended, reacted with toluidinediisocyanate (TODI) and subsequently extended with butanediol.  Surprisingly there appears to act some kind of synergy resulting in properties higher than would be expected from the individual polyol components.

3,3′-Dimethyl-4,4′-Biphenyldiisocyanate (TODI)