| 摘要 |
A process for preparing a highly white N,N'-ethylene-bis(tetrabromophthalimide) product, comprising: reacting ethylene diamine and tetrabromophthalic anhydride in aqueous acetic acid to produce N,N'-ethylene-bis(tetrabromophthalimide); recovering the N,N'-ethylene-bis(tetrabromophthalimide) in a white precipitate; and drying the precipitate, so as to form an N,N'-ethylene-bis(tetrabromophthalimide) product. Also disclosed is a flame retardant composition predominantly comprised of N,N'-ethylene-bis(tetrabromophthalimide) and having unprecedented color and high purity. |
