SALTS OF SUBSTITUTED P-PHENYLENE DIAMINE DEVELOPING AGENTS AND THEIR USE IN COLOUR PHOTOGRAPHY

摘要

1416699 Salts of substituted p-phenylene diamines EASTMAN KODAK CO 4 Dec 1972 [3 Dec 1971] 55891/72 Heading C2C [Also in Division G2] The invention comprises the p-toluene sulphonic acid salts of compounds of the formula wherein n is an integer from 1 to 4, RSP1/SP is H, alkyl other than ethyl, alkoxyalkyl, hydroxyalkyl, carboxylic acylamido having up to 4 C atoms in the alkyl component or sulphonamido groups if either RSP4/SP or RSP5/SP are other than H, RSP1/SP may be C 2 H 5 , RSP2/SP is H or C 1 -C 4 alkyl or hydroxyalkyl, RSP3/SP is H, alkyl, alkoxy, carboxylic acylamido or acylamidoalkyl, sulphonamido or sulphonamidoalkyl, RSP4/SP and RSP5/SP are the same as RSP3/SP, or are the atoms necessary to form a 5- or 6- membered ring with RSP1/SP.