Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Patent
1991-07-19
1993-01-05
Raymond, Richard L.
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
430214, C07C23365
Patent
active
051772620
ABSTRACT:
Hydroquinones form stable hydrogen-bonded complexes with N,N,N',N'-tetrasubstituted diamides of aromatic dicarboxylic acids in which two carboxyl groups are arranged para to one another on the same phenyl ring. These complexes are useful in rendering the hydroquinones more water-dispersible to assist their incorporation into photographic products. Also, the diamides may be incorporated into photographic products to reduce or eliminate various problems associated with hydroquinones, including migration of hydroquinones within the product during storage and the discoloration of images on storage due to oxidation of hydroquinone present in an image-receiving element of the photographic product.
REFERENCES:
patent: 2627460 (1953-02-01), Land
patent: 2983606 (1961-05-01), Rogers
patent: 3362819 (1968-01-01), Land
patent: 3719489 (1973-03-01), Cieciuch et al.
patent: 3914187 (1975-10-01), Fein et al.
patent: 3954682 (1976-05-01), Fein et al.
patent: 3988318 (1976-10-01), Copes et al.
patent: 3988350 (1976-10-01), Copes et al.
patent: 3998351 (1976-10-01), Copes et al.
patent: 4058462 (1977-11-01), Fein et al.
patent: 4293641 (1981-10-01), Takahashi et al.
patent: 4740448 (1988-04-01), Kliem
patent: 4942107 (1990-07-01), Saeki
patent: 4946967 (1990-08-01), Login et al.
Lee, W. E. and Brown, E. R., in Chapter 11 of James, T. H. (ed.), The theory of the photographic process, Macmillan, New York (1977).
Walworth, V. K. and Mervis, S. H., Instant photography and related reprographic processes, in Sturge, J., Walworth, V. K., and Shepp, A. (eds.), Imaging materials and processes--Neblette's eighth edition, Van Nostrand Reinhold, New York, NY (1989).
Beilstein, Handbuch der Organische Chemie, E IV 9, p. 3321, Syst-Nr. 978/H 845, E III, p. 4253.
Taylor Lloyd D.
Warner John C.
Cole David J.
Polaroid Corporation
Raymond Richard L.
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