Bis-HPMA Poly(Hexamethylene/Pentylene Carbonate)/IPDI Copolymer is a urethane polymer formed by a multi-step process. First, a prepolymer is made by condensing Hexanediol, 1,5-Pentanediol, and Dimethyl Carbonate, which is subsequently reacted with Isophorone Diisocyanate (IPDI). The resulting polymer is end-capped with Hydroxypropyl Methacrylate (HPMA).