Transparent, impact-resistant polyesterurethane laminates

An optically-clear, energy-absorbing laminate, comprising at least one glass sheet bonded to a sheet of a substantially unreacted isocyanate free, thermoplastic, transparent polyesterurethane that is the reaction product of (a) essentially linear hydroxy-terminated polyester having a liquidus temperature of at least 44.degree. C., said polyester being selected from the group consisting of poly(1,4-butylene adipate) and poly(1,4-butylene azelate) having a molecular weight of about 2000, (b) 4,4'-methylene-bis-(cyclohexyl isocyanate), and (c) aliphatic diol containing from 4 to 8 carbon atoms, the mole ratio of (c) to (a) being from about 1.5:1 to about 5:1, the isocyanate groups provided by (b) being substantially numerically equivalent to the sum of hydroxyl groups provided by (c) and (a) whereby to provide a polyesterurethane that is substantially free of unreacted isocyanate groups, said mole ratio of (c) to (a) being so proportioned within said range that a rigidly held laminate prepared from about 0.030 inch thick sheeting of said polyesterurethane sandwiched between two 12" .times. 12" .times. 1/8" glass sheets is non-brittle at 0.degree. F. and exhibits a mean penetration velocity of at least 20 miles per hour at laminate temperatures of 0.degree. F. and 70.degree. F., and a mean penetration velocity of at least 17 miles per hour at a laminate temperature of 120.degree. F. when impacted with a five pound free falling steel ball.