Synthesis of Fluorocyclotriphosphazene Derivatives and Their Fire-Retardant Finishing on Cotton Fabrics

Table 4

Effect of the catalyst agent concentration on the fire-retardant performance.

Catalyst agent /%	Afterflame time/s	Afterglow time/s	Burning char length/cm	Breaking strength/N (weft)	Whiteness (%)
0.5	3	0	9.4	209.8	82.07
1	3	0	9.3	209.4	82.03
2	3	0	8.9	206.5	81.98
3	2	0	8.4	199.8	81.95

Cotton fabric was treated with different catalyst agent concentration, 35% (owf) fire-retardant agent, 5% (owf) crosslinking agent, 5%(owf) urea and was cured at 160°C for 3 min.