Polyurethane-105 is a complex urethane polymer that is made by a multistep process. First, Trimethylolpropane is reacted with 1,3-Bis(isocyantomethyl)cyclohexane to form a reactive intermediate. This intermediate is reacted with Polyhexamethylene Diisocyanate, Gelatin and Maltodextrin to form a crosslinked polyurethane.