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

Table 2

Percentage of by-products in reaction products of BHEOA with excess of EC.

Entry*	Initial molar	Percentage of OXON in post-reaction	Percentage of glycols in postreaction mixtures (wt.-%)
	ratio	Mixtures (wt.-%)	DEG^a	TRIEG^b	TETRAEG^c
1.	1 : 2	0	0	0	0
2.	1 : 2	5.49	0	0	0
3.	1 : 2**	18.48	0	0	0
4.	1 : 2	4.74	0	0	2.26
5.	1 : 4	0	2.15	0	0
6.	1 : 6	0	1.41	3.41	0
7.	1 : 6	0	2.75	3.49	2.35
8.	1 : 10	1.75	0	0	1.47
9.	1 : 10	2.65	0	0	2.45

^∗Entry according to Table 1, ^∗∗DABCO was used as catalyst, ^adiethylene glycol, ^btriethylene glycol, ^ctetraethylene glycol.