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US 4,734,349 AGranted
Toners and yellow dye compounds used therein
AssigneeEastman Kodak Company
InventorsDerek D. Chapman, Julie P. Harmon
Life of this patent
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Abstract
Novel cyano hydroxy pyridone monoazo yellow dye compounds are useful in thermoplastic electrostatographic toners. They absorb at the desired wavelength, are lightfast and have high tinctorial strength. They resist decomposition, sublimation and bleeding upon being thermally fixed to a substrate. For use in color transparencies, these dyes form a transparent toner image.
Claims10
A powdered toner composition comprising a thermoplastic polymer blended with from about 0.5 to 10 percent by weight of a yellow dye having the formula:
- ##STR24## wherein:
- R is --HN--R.sup.3 or --Alk--R.sup.4,
- R.sup.1 is the radical of a non-ionic diazo component of the benzene or naphthalene series,
- R.sup.2 is alkyl of 1 to 10 carbon atoms, phenyl or lower alkyl-substituted phenyl;
- R.sup.3 is --SO.sub.2 --Ar, --SO.sub.2 --R.sup.5 or ##STR25## R.sup.4 is ##STR26## or --NH--SO.sub.2 --Ar;
- R.sup.5 is alkyl of 1 to 12 carbon atoms;
- Alk is alkylene of 1 to 4 carbon atoms;
- and
- Ar is phenyl or lower alkyl-substituted phenyl.
6 more elements
Dependencies are inferred from the claim text.