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

Table 5

Properties of foams.

Kind of polyol	Comp. No.^a	Density (kg/m^3)	Water uptake (wt.-%)			Linear dimension change after heating at 150^∘C (%)
			after 5 min	after 3 hrs	after 24 hrs	length		width		thickness
						after 20 hrs	after 40 hrs	after 20 hrs	after 40 hrs	after 20 hrs	after 40 hrs
EC6	1.	37.79	3.80	9.39	9.63	0.00	1.17	0.00	0.00	0.39	0.19
EC10	2.	30.86	4.92	9.66	11.71	2.15	3.01	1.39	1.74	0.00	0.00