c was charged to a reaction kettle and stirred under an atmosphere of nitrogen while the temperature of the kettle and contents was raised to 60 u00b0 c to the isocyanate was added rapidly with stirring over a period of 5 minutes a total of 500 g 1 equivalent of carbowax 1000 a polyethylene glycol of molecular weight 1000 union carbide corporation the temperature was maintained at 60 u00b1 5 u00b0 c during the addition after the addition was complete the mixture was maintained at the same temperature with stirring and aliquots were removed at approximately 5 minute intervals and mixed with approximately 6 times their volume of water it was found that the early aliquots gave milky fluids but that at approximately 45 minutes after the admixture of polyisocyanate and glycol was completed the aliquot gave a clear solution in water subsequent aliquots also gave clear solutions until 60 minutes after the admixture of polyisocyanate and glycol thereafter the aliquots reacted with the water and gave foams the above experiment was repeated and approximately 50 minutes after the admixture of polyisocyanate and glycol was completed the mixture was added to water at the rate of 100 ml of water per 15 g of mixture with stirring the clear amber colored solution so obtained showed no tendency to deposit solids even after 8 months of storage at room temperature approximately 20 u00b0 c this solution is referred to hereinafter as solution a the above experiment was repeated but.