Study On P/N/S Intumescent Flame Retardant Base On Sulfone Aldehyde Resin

Due to the cotton fabric flame retardant finishing of poor durability or use and more able to release the environmental pollution in the process of production of gas, so the use of flame retardant elements of good effect, cotton modified by the multivariate synergistic flame retardant group is accord with the requirement of no halogen and smoke-free low flame retardant finishing, it makes sense to issue.Paper cover with flame retardant effects of cyanuric chloride, sulfone aldehyde resin and trimethyl phosphite, semicarbazide and sodium bisulfite, and test the durability and effect of modified cotton fabric. For raw material ratio, reaction time and washing times on the single factor experiment, and on this basis of three factors, four levels orthogonal test, and got the best finishing process. At the same time, in view of the modified cotton fabric damaged length, loss of breaking strength and whiteness, feel and durability test research.The best of conditions for the line: cyanuric chloride: sulfone aldehyde resin(mol)=12:1(molar ratio), cotton: 4,4,-di( 4,6-dichloro-1,3,5-triazine) polystyrene sulfone=1:0.6(molar ratio), the second step reaction time was 20 min, The second step reaction time was 25 min. After 12 times of washing, the damaged length is 192mm<200mm, the continue burning time is 11.32s<15s, the smoldering time is 9.62s<10s, the flame retardant cotton was still up to GB B2 and showed a good washing fastness.The best of conditions for the optimize line: cyanuric chloride: cotton(molar ratio)=0.6:1,(cotton-TCT): sulfone aldehyde resin=0.5:1(molar ratio),(cotton-TCT- sulfone aldehyde resin): trimethyl phosphitethe =5:1(molar ratio), the reaction time was 35 min. After 12 times of washing, the damaged length is 156 mm, the continue burning time is 12.6s, the smoldering time is 10.86 s, the flame retardant cotton was still up to GB B2 and showed a good washing fastness.