Reactions of N,N^′-bis(2-hydroxyethyl)oxalamide with Ethylene Carbonate and Use of the Obtained Products as Components of Polyurethanes Foams

Table 3

Thermal stability of reaction products of BHEOA with EC.

Entry	Initial molar ratio OA : EC	T5% (∘C)	T10% (∘C)	T20% (∘C)	T50% (∘C)	Temperature of max. decomposition (∘C)
1.	BHEOA	230	250	265	270	270
2.	1 : 6	160	180	220	260	250 and 360
3.	1 : 10	90	160	190	240	220 and 350
4.	1 : 10*	90	160	210	290	250 and 350
5.	comp. 1	200	220	240	330	260

^∗after heating of the product at 200^∘C for 4 hours, T_x%—temperature at which the weight loss is x%.