Patent Title: BIODEGRADABLE AND/OR BIOABSORBABLE THERMOPLASTIC POLYURETHANES

 Number/Link: WO2018/140912

Applicant/Assignee:  Lubrizol

Publication date: 2 august 2018

“Gist”: TPU breaks down into non-toxic components

Why it is interesting: The invention is related to biodegradable TPU for medical use in vivo. The TPU is prepared from isocyanates, polyols and chain extenders that biodegrade into non-toxic products, e.g. hexane diisocyanate, butanediisocyanate, lysine diisocyanate, poly(ε-caprolactone), polyglycolide, dipropylene glycol, diethyleneglycol etc.  The TPUs are prepared at a hardblock content of 15-45% (pref).
I strongly doubt that this case is patentable because the same compositions are disclosed inanother Lubrizol application discussed before in this blog.

Lysine diisocyanate