| 摘要 |
NEW MATERIAL:A compound expressed by formula I (R1 and R2 are monofunctional aromatic group; R<3> and R<4> are H or monofunctional organic group having ester-forming functional group; Ar is trifunctional aromatic group having >=2 aromatic rings, provided that the aromatic ring may have a substituent group). EXAMPLE:A compound expressed by formula II. USE:A raw material for polyesters, stabilizer and flame retardant for polymers. PREPARATION:Water in an amount of preferably 1-8 times based on a phosphinic halide expressed by formula III (X is halogen) is added thereto and the reaction mixture is heated and hydrolyzed in a solvent, such as benzene or xylene, preferably at 50-100 deg.C for 1-30hr to provide a phosphine oxide expressed by formula IV, which is then reacted with the corresponding cyclic conjugated diketone in a solvent, such as ethyl cellosolve, at 0.8/1.2-1.2/0.8 molar ratio, preferably at 60-130 deg.C for 30-180min and, as necessary, further reacted with an acid anhydride of a lower fatty acid, etc.
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