Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1990-06-11
1991-12-10
Ivy, C. Warren
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
549252, 528306, 528307, 528345, 528346, 528344, 528298, C07D40700, C07D30734
Patent
active
050720031
ABSTRACT:
Compounds are disclosed which are anhydrides containing additional carboxylic acid moieties and dianhydrides of disubstituted maleic anhydride compounds wherein the acid anhydrides and dianhydrides retain their alkene character. These compounds are useful as precursors for polyesters, thermally stable polyamide-imides and polyimides.
REFERENCES:
patent: 3355464 (1967-11-01), Zienty et al.
patent: 4271288 (1981-06-01), Woo
patent: 4596867 (1986-06-01), Fields et al.
patent: 4638072 (1987-01-01), Fields et al.
Behrend Steven J.
Fields Ellis K.
Amoco Corporation
Covington Raymond
Ivy C. Warren
Magidson William H.
Medhurst Ralph C.
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