Abstract: A composition includes thermoplastic polyurethane (TPU) and methyl methacrylate-acrylonitrile-butadiene-styrene (MABS) graft copolymer. The TPU is present in an amount of greater than 40 parts by weight, and the MABS graft copolymer is present in an amount of from 1 to 50 parts by weight, both based on the total weight of the composition. The composition has a light transmission value of at least 40%, as measured in accordance with ASTM D-1003, and a coefficient of friction of less than 1.5. The composition including the TPU and the MABS graft copolymer in the above weight ranges has good transparency, elongation, tensile strength, tear strength, elasticity, chemical resistance, and abrasion resistance that are all associated with the TPU.

Abstract: The invention comprises modifying a preformed thermoplastic polyurethane product made from the reaction of a difunctional isocyanate with a polyester or a polyether diol, along with a monomeric, low molecular weight diol as a chain extender. The preformed thermoplastic polyurethane product is then cross-linked by the addition of an isocyanate prepolymer made from the reaction of an excess of a polyisocyanate with a polyester or polyether polyol. The invention further comprises a process for forming the thermoplastic polyurethane product described above utilizing a single or twin screw extruder to mix and react the ingredients.