Great Lakes PHT4-DIOL Tetrabromophthalate diol 77098-07-8 Great Lakes Flame and Smoke Retardants >> Bromine based PU - Prepolymers ADHESIVE Great Lakes PHT4-DIOL™ Reactive Halogenated Flame Retardant Great Lakes PHT4-Diol, tetrabromophthalate diol, is a reactive flame retardant intermediate. Great Lakes PHT4-Diol is a viscous, light brown colored liquid which exhibits excellent compatibility with a broad range of commercial polyols and blowing agents. Great Lakes PHT4-Diol is recommended as a reactive flame retardant for Class 1 and Class 2 rigid polyurethane foam. Great Lakes PHT4-Diol foams can be formulated for excellent physical properties or favorable economics. Other application areas include polyurethane RIM, elastomers, coatings, adhesives and fibers. Viscous, light brown colored, tetrabromophthalate diol. Used as a reactive flame retardant in polyurethane adhesives. Offers very good compatibility with a broad range of commercial polyols and blowing agents, and very good physical properties.