초록 ▼

Substituted hydroxylamine antioxidants can be prepared by reacting hydroxylamine or a mono-substituted hydroxylamine with an epoxide. The antioxidant reaction product is not removed from the reaction mixture, but is used without separation after combination with a color developer to provide a photog

Substituted hydroxylamine antioxidants can be prepared by reacting hydroxylamine or a mono-substituted hydroxylamine with an epoxide. The antioxidant reaction product is not removed from the reaction mixture, but is used without separation after combination with a color developer to provide a photographic color developer composition. The antioxidants are highly water soluble and thus exhibit no objectionable odor.

대표청구항 ▼

[ We claim:] [1.] An aqueous color developer precursor reaction mixture having a pH of at least 8, and comprising:a) hydroxylamine or a mono-substituted hydroxylamine, andb) an epoxide having either the structure (IV): [ STR 12 ] or (V): [ STR 13 ] wherein R' is an alkyl group of 1 to 10 carbon atom

[ We claim:] [1.] An aqueous color developer precursor reaction mixture having a pH of at least 8, and comprising:a) hydroxylamine or a mono-substituted hydroxylamine, andb) an epoxide having either the structure (IV): [ STR 12 ] or (V): [ STR 13 ] wherein R' is an alkyl group of 1 to 10 carbon atoms, a hydroxyalkyl group of 1 to 10 carbon atoms, a cycloalkyl group of 5 to 10 carbon atoms, or an aryl group having 6 to 10 carbon atoms in the aromatic nucleus,R.sup.1 and R.sup.2 are independently hydrogen, an alkyl group of 1 to 2 carbon atoms, or a hydroxyalkyl group of 1 to 2 carbon atoms, or R.sup.1 and R.sup.2 together represent the carbon atoms necessary to complete a 5- to 8-membered saturated or partially saturated carbocyclic ring structure, andY is an alkylene group of at least 4 carbon atoms and has an even number of carbon atoms, or Y is a divalent aliphatic group having an even total number of carbon and oxygen atoms in the chain, provided that said divalent aliphatic group has at least 4 atoms in the chain.