4,4',5,5'-Dioxydiphthalic dianhydride (DODA), a new monomer for the synthesis of polyimide resins, has been prepared by the action of a base on a 4,5-dihalophthalic anhydride in a polar aprotic solvent. Both potassium carbonate and a combination of potassium fluoride and water have afforded DODA in a high-yielding single-step reaction. The product was purified by crystallization of its di-n-butyl ester. A variety of polyimides and copolyimides incorporating DODA were prepared, and afforded creasable films having good physical properties.
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References
1.
[1] Bessonov M I, Koton M M, Kudryavtsev V V and Laius L A1987Polyinides-Thermally Stable Polymers (New York: Consultants Bureau)
2.
[2] Sroog C E1991Prog. Polym. Sci.16561-561
3.
[3] St Clair T L1990Structure-Property Relationships in Linear Aromatic Polymides (London: Blackie)
4.
[4] Mundhenke R F and Schwartz W T1990High Perform. Polym.257-57
5.
[5] St Clair A K and Slemp W S1985NASA Technical Memorandum86341-86341January
6.
[6] Govindachari T R, Sathe S S and Viswaaathan N1967Ind. J. Chem.5128-128
7.
[7] Tilika V, Pohnlmane G, Meirovics I and Neilands O1982Latv. PSR Zinat. Akad. Vestis. Kim. Ser. (2) 201-201
8.
[8] Cella J A and Haitko D B 1988 PCT Int. Appl. WO 8809353 to General Electric (12/1/88)
9.
[9] Erglis A A and Movshovich S M 1973 USSR Patent 395,358 (28/8/73)
10.
[10] Dinan F J et al 1992High Perform. Polym.4131-131
11.
[11] Wolfe R A, Schwartz W T and Dinan F J1991Magn. Resonance Chem.29440-440
12.
[12] Ziller J W, Schaber P M and Dinan F J1993Acta Crystallogr.C 491430-1430
