摘要:
A high use temperature wholly aromatic polyester resin, comprising, i) a diacid component comprising 2,6-naphthalenedicarboxylic acid (N) and terephthalic acid (T) monomer units, wherein the ratio N:T is from about 0.25 to about 4.0, ii) an aromatic diol component, comprising 4,4′-dihydroxybiphenyl monomer units, and iii) 10-80 mole percent p-hydroxybenzoic acid monomer units, based on the total monomer units.
摘要:
A high use temperature wholly aromatic polyester resin, comprising, i) a diacid component comprising 2,6-naphthalenedicarboxylic acid (N) and terephthalic acid (T) monomer units, wherein the ratio N:T is from about 0.25 to about 4.0, ii) an aromatic diol component, comprising 4,4′-dihydroxybiphenyl monomer units, and iii) 10-80 mole percent p-hydroxybenzoic acid monomer units, based on the total monomer units.
摘要:
A new photographic coupler comprises a coupling-off group bonded to the coupler at the coupling position represented by the formula: wherein L is a linking group; NR' is a substituted nitrogen atom bonded to DYE that together with NR' is a releasable dye comprising an electrically neutral chromophore. Such a coupler enables dye hue stabilization without mordanting the dye formed. Such a new coupler is useful in a photographic silver halide element and process to provide increased dye density, higher contrast dye images, and lower pH sensitivity upon processing.
摘要:
A color photographic element comprising a support and first and second silver halide emulsion layers sensitized to first and second regions of the electromagnetic spectrum respectively and each containing a dye forming coupler, wherein the second emulsion layer is to a limited extent also sensitized to the first region of the spectrum. The element exhibits extended exposure latitude.
摘要:
Une tête de photomètre (2) comprend une plaque de base (4) sur laquelle sont montées deux parties de logement (6, 8). Des sectionsde paroi, dont sont constituées les parties de logement (6, 8), sont espacées de façon à former entre elles un interstice (10), la plaque de base (4) formant un fond pour l'interstice (10). Une source lumineuse (14) et un dispositif photo-sensible (16) sont également prévus.
摘要:
Photographic compounds capable of releasing a photographically useful group (PUG) by means of an intramolecular nucleophilic displacement provide increased image acutance when a coupling-off group in the coupling position of the compound is a group of the formula: wherein PUG is a photographically useful group; Q is N or C-R where R is hydrogen or a substituent that does not adversely affect imaging; and Z represents atoms completing a non-aromatic, heterocyclic ring system. The photographic compounds are useful in photographic materials and processes and enable increased acutance of developed images.
摘要:
A pyrazolone colour coupler of the general formula: wherein Ar is a substituted or unsubstituted aryl group, R is a substituted or unsubstituted alkyl or aryl group, L is a direct bond or a linking group, and Ballast is a group of such size and configuration as to render the coupler non-diffusible in photographic coatings provides image dyes of improved fastness to light and resistance to yellowing.
摘要:
Photographic elements are described containing a polymeric dye-forming coupler that has been formed by emulsion polymerization of ethylenically unsaturated monomers in the presence of a high-boiling organic coupler solvent. Couplers of high activity are obtained.
摘要:
A solid particle dispersion of a dye having the formula: R₁ and R₂ are each independently substituted or unsubstituted alkyl or aryl, or together represent the atoms necessary to complete a substituted or unsubstituted 5- or 6-membered ring, R₃ and R₄ each independently represents H, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, CO₂H, or NHSO₂R₆, R₅ is H, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, substituted or unsubstituted carboxylate, substituted or unsubstituted amido, or substituted or unsubstituted acyl, R₆ and R₇ are each independently substituted or unsubstituted alkyl or substituted or unsubstituted aryl, R₈ is substituted or unsubstituted alkyl, or together with R₉ forms a double bond, R₉ is H or together with R₈ forms a double bond, and n is 1 or 2, with the proviso that at least one of the aryl rings of the dye molecule has at least one substituent that is CO₂H or NHSO₂R₆, are useful as filter dyes in photographic elements.