Diol of tetrabromophathalic Anhydride is a reactive flame retardant, mainly for the hardness of the polyurethane foam flame retardant adhesives and coatings.It is excellent for class 1 and class 2 rigid polyurethane foam, its foam can be formulated for excellent physical properties or favorable economics. Other application areas include polyurethane RIM, elastomers, coatings, adhesives and fibers.
Acid value (mgKOH/g): 1.0 max
Hydroxyl number(mgKOH/g): 190-265
Viscosity cps at 25 ℃: 30,000-70,000
Bromine content （%）: 42.5min
Mainly for the hardness of the polyurethane foam flame retardant adhesives and coatings.
Package & Storage
Package: 200L zinc iron drums. 300kg/drum Or 1,500kg/IBC;
storage: Store in dry, dark and ventilated place.
B-627 flame retardant is a stable, reactive bromine-containing diester/ether diol of tetrabromophthalic anhydride. The nominal structure of B-627 flame retardant is a mixed ester of tetrabromophthalic anhydride with diethylene glycol and propylene glycol.
B-627 is a reactive diol for rigid polyurethane foam, Urethane elastomers and coatings with high bromine content, scorch resistant and good performance.