Process for the preparation of squaraine compositions in presenc

Details Process for the preparation of squaraine compositions in presenc Process for the preparation of squaraine compositions in presenc

1984-03-12

1985-06-18

Shaver, Paul F.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

C07C 8500, C07C 8502, C07C 8506

Patent

active

045242208

ABSTRACT:
This invention is generally directed to an improved process for the preparation of squaraine compositions which comprises the reaction of squaric acid with an aromatic aniline in the presence of an aliphatic amine, wherein there results a product of reduced dark decay properties and increased charge acceptance values as compared to squaraine compositions prepared from the squaric acid process in the absence of an aliphatic amine.

REFERENCES:
patent: 3617270 (1971-11-01), Kampfer
patent: 4353971 (1982-10-01), Chang et al.
patent: 4390610 (1983-06-01), Bowden et al.
patent: 4391888 (1983-07-01), Chang et al.
The Chemistry of Squaraines-A. Schmidt, pp. 191, 192, 197-203, 204, (1980), Oxocarbons.
White et al., "J.A.C.S.", 86, pp. 453-458, 2/1964.

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