| 摘要 |
NEW MATERIAL:A compound shown by the formula I (X1 and X2 are H, halogen, or lower alkyl; R is alkylene, cycloalkylene, or arylene). EXAMPLE:A compound shown by the formula II. USE:A flame-retardant for organic high polymer substance such as polyphenylene ether resin, polyphenylene ether-polystyrene resin, polyester resin, etc. Improving light resistance, oxidation resistance, resistance to thermal deterioration, etc. PREPARATION:A compound shown by the formula III or formula IV (R1 and R2 are H, or lower alkyl) is reacted with a compound shown by the formula H2N-R-NH2 in a solvent such as preferably benzene, etc. at 80-200 deg.C.
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