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US 5,508,155 AGranted
Photographic color developers containing odorless antioxidants formed in situ from reaction of hydroxylamine and epoxide and use of same
AssigneeEastman Kodak Company
InventorsCarl A. Marrese, Paul A. Zielinski
Life of this patent
Estimating the term…
Abstract
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.
Claims14
A photographic color developer composition comprising:
- a) a photographic color developer, and
- b) a substituted hydroxylamine antioxidant which has the structure (I):
- ##STR12## 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,
- X.sub.1 has the structure (II):
- ##STR13## and X.sub.2 has the structure (III):
- ##STR14## wherein 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,
- 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 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):
- ##STR15## or (V):
- ##STR16## wherein R', R.sup.1, R.sup.2 and Y are defined above, said reaction product remaining in said reaction mixture for use as an antioxidant when mixed with said photographic color developer.
11 more elements
A method for developing a color photographic element comprising:
- treating an imagewise exposed and undeveloped color photographic element with a color developer composition comprising:
- a) a photographic color developer, and
- b) a substituted hydroxylamine antioxidant which has the structure (I):
- ##STR17## 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,
- X.sub.1 has the structure (II):
- ##STR18## and X.sub.2 has the structure (III):
- ##STR19## wherein 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,
- 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 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):
- ##STR20## or (V):
- ##STR21## wherein R', R.sup.1, R.sup.2 and Y are defined above, said reaction product remaining in said reaction mixture for use as an antioxidant when mixed with said photographic color developer.
11 more elements
Dependencies are inferred from the claim text.