Table 6. Combinations of Compounds Tested and Their Reaction Temperatures and Durations.

run	U:Fa (molar ratio)	F:NH3b (molar ratio)	reaction temperature (°C)	reaction time (h)
1	0.75	1.33	60	1.5
2	1.25	1.33	60	1.5
3	0.75	2.67	60	1.5
4	1.25	2.67	60	1.5
5	0.75	1.33	100	1.5
6	1.25	1.33	100	1.5
7	0.75	2.67	100	1.5
8	1.25	2.67	100	1.5
9	0.75	1.33	60	3.5
10	1.25	1.33	60	3.5
11	0.75	2.67	60	3.5
12	1.25	2.67	60	3.5
13	0.75	1.33	100	3.5
14	1.25	1.33	100	3.5
15	0.75	2.67	100	3.5
16	1.25	2.67	100	3.5
17	0.5	2	80	2.5
18	1.5	2	80	2.5
19	1	0.66	80	2.5
20	1	3.34	80	2.5
21	1	2	40	2.5
22	1	2	120	2.5
23	1	2	80	0.5
24	1	2	80	4.5
25	1	2	80	2.5
26	1	2	80	2.5
27	1	2	80	2.5
28	1	2	80	2.5
29	1	2	80	2.5
30	1	2	80	2.5

^aUrea/formaldehyde ratio.

^bFormaldehyde/amine ratio.