Tetrabromophthalate Diol is a reactive flame retardant intermediate mainly used in polyurethane rigid foam, it's the slightly brown and sticky liquid, with good compatibility with most polyols and fluorocarbons. Tetrabromophthalic anhydride diol contains 46% bonded aromatic bromine has extremely high stability in the mixed resin. PHT4-DIOL is mainly used as a reactive flame retardant in the production of Grade I and Grade II polyurethane rigid foam (PUR). The smoke emission and flame spread speed of the foam plastic material containing PHT4-DIOL are both very low.Processing foam plastic materials with PHT4-DIOL can achieve excellent physical properties and has a relatively low cost. It can also be used to produce flame-retardant polyurethane gaskets, elastomer materials, coating adhesives and textiles. The addition amount of PHT4-Diol can be adjusted to control and achieve the ideal flame retardant performance and physical properties. Experience has proved that the increase in the addition amount of PHT4-Diol not only does not soften the material, but also can improve the anti-coking property, smoke emission property and flame spread property of the product. The presence of bonded aromatic bromine in its structure makes its properties very stable, and this is also true It helps to extend the validity period of the resin.
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