Organic compounds -- part of the class 532-570 series – Organic compounds – Phosphorus esters
Patent
1997-06-13
1998-05-26
Ambrose, Michael G.
Organic compounds -- part of the class 532-570 series
Organic compounds
Phosphorus esters
558162, C07F 912
Patent
active
057567980
ABSTRACT:
A process to prepare aryldiphosphate esters without forming an emulsion in the product is described. In one embodiment of this process, the ester is formed by initially reacting a phosphoryl oxyhalide with a dihydric aromatic compound in the presence of an insoluble catalyst to form an intermediate. The intermediate is then reacted with a monohydric aromatic compound in the presence of an insoluble catalyst to form the aryldiphosphate ester and the catalyst is then filtered from the aryldiphosphate ester. In another form of this process the ester is formed reacting a dihydric aromatic compound in the presence of an insoluble catalyst with a compound corresponding to the formula (RO).sub.2 POX, where X is bromine or chlorine and R is an aromatic group and contains no more than 1 ortho substituent. Thereafter, the catalyst is then filtered from the aryldiphosphate ester.
REFERENCES:
patent: 2520090 (1950-08-01), Barrett
patent: 3254973 (1966-06-01), Glammaria et al.
patent: 5281741 (1994-01-01), Gunkel et al.
patent: 5420327 (1995-05-01), Bright et al.
Database Caplus on STN, Chemical Abstracts, (Columbus, OH, USA) No. 117:235108, Tabankia et al. "Flame Retardant Polymer Compositions Containing Poly9butylene Terephthalate) and Oligomeric Phosphoric or Phosphonic Acid Esters" Abstract EP 491986, 1 Jul. 1992.
Janet R. Morrow et al., "Transesterfication of a Phosphate Diester by Divalent and Trivalent Metal Ions" Inorganic Chemistry, vol. 31, 1992, pp. 16-20.
Abstract: Jpn Kokai Tokkyo Koho JP 05186681, Jul. 1993, "Fire-resistant poly(phenylene ether) compositions."
Abstract: Brit. Patent No. 1027059, Apr. 1966, "Preparation and Uses of CN-1985 and CN-1986."
Ambrose Michael G.
Great Lakes Chemical Corporation
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