Patent Title: CALIXARENE-TYPE PHOTOCURABLE POLYURETHANE RESIN AND SELF-REPAIRING COATING PREPARED THEREFROM

 Number/Link: WO2018/205208  (Chinese)

Applicant/Assignee:  Jiangnan Univ.

Publication date: 15 November 2018

“Gist”: A coumarine-containing prepolymer is reacted with calixarene

Why it is interesting: UV-curable and self-healing polyurethanes containing coumarine groups have been discussed before in this blog. In the current invention, an isocyanate-ended prepolymer is partially capped with coumarine groups.  The remaining NCO groups are then reacted with a calixarene to form a core-shell type material that can be used in UV curable coatings with improved hardness and self-healing characteristics.

Calixarene-based polyurethane according to the invention