polycat 70 0 4 6 9 05 cyclohexylamine polycat 77 0 5 3 10 6 dimethylethanolamine 1 0 1 4 07 substituted morpholine 1 0 2 6 58 dimethylpiperazine 0 3 16 14 9 dimethylaminoethyl 3 dimethyl 1 0 4 15 aminopropylether10 dimorpholinoethane 2 0 21 15 11 tetraethylethyleneamine 0 3 3 slow12 dabco amp dimethyl 0 3 5 slow ethanolamine13 imidazole 2 0 11 15 14 triethanolamine 0 3 8 no set15 1 3 bis dimethylamino 0 3 7 very slow 2 propanol16 dimethylaminoethoxy 1 0 3 4 7 ethanol17 dimorpholinodiethylether 1 0 34 6 018 dimorpholinodiethylether 2 0 31 4 519 dimorpholinodiethylether 3 0 28 4 0______________________________________ it is evident from the results shown in table i that the dimorpholinodiethylether catalyst provides the long gel times and the short set times that are desirable and required for a polyurethane cast bandage to a 5 liter resin flask equipped with a thermometer a stirrer a nitrogen inlet and a drying tube 3007 grams of isonate u00ae 143l modified diphenylmethane diisocyanate was charged then 3 62 grams of dow corning dc 200 30 000 cs and 2 41 grams of benzoyl chloride were added the charge was stirred for 15 minutes to mix thoroughly to this 1828 grams of pluracol u00ae p1010 60 by weight and poly g u00ae 36 232 40 by weight to which was added 85 grams of dimorpholinodiethylether was added while stirring the polyols were dried prior to mixing with the catalyst the equivalent ratio of nco to oh was 4 18 1 the addition of the polyols was made through a dropping funnel in 20 25 minutes after the addition was completed the polymerization was carried out at 50.