Free radical photosensitive compositions containing bis-sulfides

Details Free radical photosensitive compositions containing bis-sulfides Free radical photosensitive compositions containing bis-sulfides

1975-12-15

1977-05-03

Louie, Jr., Won H.

Gas separation: apparatus

Electric field separation apparatus

Including gas flow distribution means

96 90R, 96 50PL, G03C 152

Patent

active

040212467

ABSTRACT:
This invention provides photosensitive compositions based on leuco dye and dye bases and which exhibit improved sensitivity and improved resistance to dark fogging as a consequence of the incorporation of organic bis-sulfide or sulfinyl ester compounds into photosensitive compositions comprising at least one leuco dye and at least one styryl, cyanine or merocyanine dye base. Preferably an additional improvement comprises provision of an overcoat for the photosensitive composition of this invention when in the form of thin films on a support such as a polyester or a paper sheet or glass plate. The overcoat acts to improve the shelf life and photosensitometric properties of the photosensitive composition.

REFERENCES:
patent: 3042515 (1962-07-01), Wainer
patent: 3042516 (1962-07-01), Wainer
patent: 3102810 (1963-09-01), Sprague et al.
patent: 3442649 (1969-05-01), Rasch et al.
patent: 3697272 (1972-10-01), Ramins

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