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Cure characteristics of hydroxyl terminated polybutadiene (HTPB) prepolymer with avariety of blocked toluene diisocyanate (TDI) in the presence of triethylamine (TEA) andchloroacetic acid catalyst are reported. Phenol, thiophenol, p-chloropheno1, p-nitrophenol,p-cresol, resorcinol, naphthols, caprolactam and butylated-hydroxytoluene were used as blockingagents. Viscosity measurements have been carried out using a mixture of HTPB and blocked TDIin cyclohexanone in the presence of the catalysts at 50℃ and 60℃ using Haake rotational vis-cometer. Viscosity measurements have also been carried out with 50% solids such as ammonium sulphate along with HTPB and TDI adduct.
Phenol, thiophenol, p-chloropheno1, p-nitrophenol, p-cresol, resorcinol (TDI) , naphthols, caprolactam and butylated-hydroxytoluene were used as blocking agents. Viscosity measurements have been carried out using a mixture of HTPB and blocked TDI cyclohexanone in the presence of the catalysts at 50 ° C and 60 ° C using Haake rotational vis-cometer. also has carried out with 50% solids such as ammonium sulphate along with HTPB and TDI adduct.