摘要:
An image-receiving element for use in photographic diffusion transfer film units of the "peel-apart" type is disclosed, comprising a support material; a polymeric acid-reacting layer; a water-permeable, water-sorbing polymeric layer for the gathering of processing moisture and image-degrading salt species; a thin, polymeric latex-deposited, water-impermeable and non-sorbing timing layer which is substantially impermeable to alkali for a predetermined period until the occurrence of a predetermined chemical reaction and conversion of said layer to a condition of permeability to alkali; and an alkali-permeable and dyeable image-receiving layer.
摘要:
Polymers containing pyridinium ylide moieties are subjected to actinic irradiation to convert the pyridinium ylide moieties to water-insoluble or hydrophobic N-acyl-diazepine polymers. The polymeric pyridinium ylides can be used for the waterproofing or hydrophobization of surfaces and for the production of printing plates, photoresists, printed circuit boards and the like.
摘要:
Hydroquinones form stable hydrogen-bonded complexes with N,N,N',N'-tetrasubstituted diamides of aromatic dicarboxylic acids in which two carboxyl groups are arranged para to one another on the same phenyl ring. These complexes are useful in rendering the hydroquinones more water-dispersible to assist their incorporation into photographic products. Also, the diamides may be incorporated into photographic products to reduce or eliminate various problems associated with hydroquinones, including migration of hydroquinones within the product during storage and the discoloration of images on storage due to oxidation of hydroquinone present in an image-receiving element of the photographic product.
摘要:
Polymeric oxime and derivatives thereof are made by polymerizing a hydrogen-blocked oxime derivative having the formula wherein R is hydrogen, lower alkyl, aryl, aralkyl or alkaryl, R' is hydrogen or lower alkyl, L is a divalent organic linking group and Z is a hydrogen-blocking group capable of being replaced by a hydrogen atom. The monomer and the polymer are new materials. Generally the hydrogen-blocking groups Z are replaced with hydrogen atoms as a subsequent step in the process.
摘要:
Hydroquinones form stable hydrogen-bonded complexes with N,N,N',N'-tetrasubstituted diamides of aromatic dicarboxylic acids in which two carboxyl groups are arranged para to one another on the same phenyl ring. These complexes are useful in rendering the hydroquinones more water-dispersible to assist their incorporation into photographic products. Also, the diamides may be incorporated into photographic products to reduce or eliminate various problems associated with hydroquinones, including migration of hydroquinones within the product during storage and the discoloration of images on storage due to oxidation of hydroquinone present in an image-receiving element of the photographic product.
摘要:
Disclosed are certain 2-(4-alkenylphenyl)-5-oxazolones useful in the production of polymers containing pendant functional groups obtained by nucleophilic ring-opening addition reactions, the 2-(4-alkenylphenyl)-5-oxazolones having the formula
wherein R 1 is hydrogen or alkyl; each of R 2 and R 3 is hydrogen, alkyl, aryl, alkaryl, aralkyl, cycloalkyl, or R 2 and R 3 together with the carbon atom to which they are bonded constitute a carbocyclic or heterocyclic ring.
摘要:
An image-receiving element for use in photographic diffusion transfer film units of the "peel-apart" type is disclosed, comprising a support material; a polymeric acid-reacting layer; a water-permeable, water-sorbing polymeric layer for the gathering of processing moisture and image-degrading salt species; a thin, polymeric latex-deposited, water-impermeable and non-sorbing timing layer which is substantially impermeable to alkali for a predetermined period until the occurrence of a predetermined chemical reaction and conversion of said layer to a condition of permeability to alkali; and an alkali-permeable and dyeable image-receiving layer.
摘要:
Polymerizable monomeric carbamates are disclosed. Polymers comprising recurring units from such carbamates undergo β-elimination in an alkaline environment and are useful in diffusion control layers in diffusion transfer photographic products.