Title: SHAPE-MEMORY-SELF-HEALING POLYMERS (SMSHPS)

 Number/Link: WO2015119688

Applicant/Assignee: University of Florida

Publication date: 13-08-2015

“Gist”: Self-healing shape memory polyurethanes made by incorporation of DA adducts in-chain

Why it is interesting: According to this invention self-healing shape memory polyurethanes can be prepared by incorporating Diels-Alder (DA) adducts into the PU network such that the DA adducts do not contribute to the crosslinking.  In this manner the material can be heated above Tg without breaking crosslinks thereby inhibiting permanent distortion of the memorised shape. The Tg is also chosen such that it is lower than the temperature at which the retro-DA reaction readily occurs. The DA adducts can be introduced using a DA adduct-containing diol as for example the adduct of a furfuryl alcohol and N-(2-hydroxyethyl)maleimide.  The SHSM polyurethanes are said to be useful for coatings and moulded materials.

Diol containing a Diels-Alder adduct