Process for producing pressure-sensitive transfer sheets using n

Details Process for producing pressure-sensitive transfer sheets using n Process for producing pressure-sensitive transfer sheets using n

1976-06-17

1979-02-06

Lesmes, George F.

Coating processes

Electrical product produced

Welding electrode

106 21, 282 275, 427151, 427152, 427153, 428307, 428914, B05D 306, B41M 522

Patent

active

041385080

ABSTRACT:
A process is provided for producing a pressure-sensitive carbonless transfer sheet comprising preparing a solution of a first chromogenic material, the solution of the first chromogenic material including at least one chromogenic compound dissolved in a carrier oil, and the first chromogenic material being reactive with a second chromogenic material in the presence of the carrier oil to form a color. The solution of the first chromogenic material is mixed with a liquid radiation curable substance to form a coating composition, the liquid radiation curable substance being curable to a frangible resin and compatible with the color-forming capabilities of said first chromogenic material. A film forming material is applied to a substrate, the film forming material being settable to form a barrier layer which substantially prevents penetration of the substrate by the coating composition upon application of the coating composition to the substrate. The film forming material is then set to form the barrier layer on the substrate, and a film of the coating composition is applied over the barrier layer. The coating composition is then cured by subjecting the coating composition to radiation for a period of time sufficient to cure the coating composition containing the radiation curable substance to a frangible resinous film, the frangible resinous film being cured to a frangibility that will permit passage of the solution of the first chromogenic material to the exposed surface of the frangible resinous film when the frangible resinous film is broken.

REFERENCES:
patent: B462893 (1976-02-01), Nelson
patent: 3020170 (1962-02-01), Macaulay
patent: 3720534 (1973-03-01), Macaulay et al.
patent: 3754966 (1973-08-01), Newman et al.
patent: 3801329 (1974-04-01), Sandner et al.
patent: 3904803 (1975-09-01), Brown et al.

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