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The main characteristics of phthalic anhydride


<Main Features of Phthalic Anhydride>

The main feature of phthalic anhydride is that compared with rigid foam polyether, a stronger benzene ring is introduced into the molecule, which is used in rigid polyurethane foam, which can greatly enhance the toughness of the foam, improve the mechanical properties of the foam and the fineness of the cells, and improve Formula; phthalic anhydride polyester polyol can be used not only in traditional F-11 foaming systems, but also in low-fluorine or non-fluorine foaming systems. Adding an appropriate amount of phthalic anhydride polyester polyol to the polyol mixture will Significantly reduce the thermal conductivity of foam, good strength, toughness, dimensional stability, and excellent flame retardancy.