reagent used was more than that needed to reduce the molecular weight to within the manufacturer 39 s specifications in the manner of example 3 200 g of the granulated polyurethane thermoplastic of example 4 was treated with 0 8 ml of n octylamine the temperature of the oven however was 92 u00b0 95 u00b0 c the viscosity of a 15 nvs solution of the treated granules in tetrahydrofuran at 21 u00b0 c was 640 cps which is clearly within the manufacturer 39 s specification of 400 800 cps at 25 u00b0 c to 200 g of the granulated polyurethane thermoplastic of example 2 in a one pint can was added 1 0 ml of a solution prepared by dissolving 10 g gaseous methylamine in benzene so as to make 100 ml of the stock solution the can was closed immediately shaken for 30 seconds and then placed in an oven at 85 u00b0 c for 18 hours the can then was removed from the oven and allowed to cool to room temperature it was opened and the odor of benzene together with a faint odor of methylamine was noted the open can was placed in a vacuum chamber at 1 mm hg for 15 minutes and then examined the vacuum stripping had removed both the ordor of benzene and of.