Photographic material with a barrier layer comprising a chill-gelable polymer and a method for coating it
申请人:EASTMAN KODAK COMPANY
(a New Jersey corporation)
公开号:EP0137672A2
公开(公告)日:1985-04-17
A photographic element having thereon a barrier layer comprising a chill-gelable polymer comprising:
(a) 30 to 97 weight percent of polymerized N-alkyl-substituted acrylamide,
(b) 3 to 25 weight percent of polymerized crosslinking monomer having at least two addition-polymerizable groups per molecule and
(c) the remainder of the copolymer (if any) being made up by one or more other polymerized monomers,
with the proviso that said other monomers (c) comprise less than 5 weight percent of cationic monomers, less than 15 weight percent of free acid monomers, and less than 3 weight percent of metal or ammonium salts of acid monomers. The barrier layer is particularly useful as a process timing layer in color image transfer film units.
A compound (I) having a carrier moiety (CAR) and a releasable development inhibitor moiety (INH) capable of being released during photographic processing by means of at least one timing group (T) bonded to and releasable from the carrier moiety provides improved images in a photographic silver halide element and process when the inhibitor moiety (INH) comprises (R') a non-aromatic, sterically hindered substituent group having (a) a tertiary carbon atom bonded directly to the releasable development inhibitor moiety or (b) a secondary carbon atom bonded directly to the releasable development inhibitor moiety and wherein the secondary carbon atom is not part of an unsubstituted carbocyclic ring containing at least 6 carbon atoms. Such compounds, particularly as couplers, are useful in photographic silver halide materials and processes to provide improved acutance and interimage effects.