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 ▼

A method for preparing a photographic color developer composition comprising: A) preparing a substituted hydroxylamine antioxidant which has the structure (I): [Figure] 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 ca

A method for preparing a photographic color developer composition comprising: A) preparing a substituted hydroxylamine antioxidant which has the structure (I): [Figure] 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, X1 has the structure (II): [Figure] and X2 has the structure (III): [Figure] wherein R1 and R2 are independently hydrogen, an alkyl group of 1 to 2 carbon atoms, or a hydroxyalkyl group of 1 to 2 carbon atoms, or R1 and R2 together represent the carbon atoms necessary to complete a 5- to 8-membered saturated or partially saturated carbocyclic ring structure, Y 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, m and n are 1, and p is 0 or 1, the antioxidant being prepared as a reaction product formed in a reaction mixture from the reaction of: 1) hydroxylamine or a mono-substituted hydroxylamine, and 2) an epoxide having either the structure (IV): [Figure] or (V): [Figure] wherein R′, R1, R2 and Y are defined above, and B) without separating said antioxidant from said reaction mixture, mixing said antioxidant with a photographic color developer.