Patent ID: 11773304

Abstract:
A polyurethane adhesive and a mixture used for manufacturing a plastic athletic track are provided. The polyurethane adhesive includes a urethane pre-polymer which is formed by a reaction between an isocyanate and a polyol. The polyol is selected from the group consisting of polyether polyol and polybutadiene polyol, and a number average molecular weight of the polyol is between 1,000 g/mole and 6,000 g/mole. Based on the total weight of the polyurethane adhesive, a content of the urethane pre-polymer is between 80 wt % and 99.5 wt %, and a viscosity of the polyurethane adhesive is between 1,000 cps and 3,000 cps under an environmental temperature of between 15° C. and 40° C.