Pressure-sensitive carbonless copy system and transfer sheet for

Details Pressure-sensitive carbonless copy system and transfer sheet for Pressure-sensitive carbonless copy system and transfer sheet for

1977-02-10

1978-09-12

Herbert, Jr., Thomas J.

Textiles: manufacturing

106 145, 106 21, 427150, 428307, 428537, 428914, B41M 516, B41M 522

Patent

active

041132823

ABSTRACT:
In accordance with one of its aspects, the pressure-sensitive carbonless copy system of this invention, wherein an acidic color precursor and a basic color developer are present, the color precursor and the color developer being co-reactive to form a color upon contact with one another in the presence of a carrier liquid and the color precursor being present in the system in solution in the carrier liquid, comprises an improvement wherein the color precursor is an organic acetate having the following formula: ##STR1## wherein R is selected from the group consisting of a C.sub.1 to C.sub.4 alkyl, methoxymethyl, methoxyethyl, ethoxymethyl and C.sub.1 to C.sub.4 chloroalkyl and X and Y are separately selected from the group consisting of hydrogen, a halogen, C.sub.1 to C.sub.4 alkyl, C.sub.1 to C.sub.4 alkoxy and C.sub.1 to C.sub.4 chloroalkyl and the color developer is an alkaline color developer having a pK.sub.b of less than about 4.8.
In accordance with another aspect of this invention, the pressure-sensitive carbonless copy sheet of this invention comprises a substrate having a plurality of surfaces having applied thereto on at least one of the said surfaces a coating containing a solution of the organic acetate color precursor in a carrier liquid.

REFERENCES:
patent: 3063864 (1962-11-01), Norman
patent: 3432327 (1969-03-01), Kan et al.
patent: 3994967 (1976-11-01), Ross
Bluhm et al., "Photoisomerization of o-Nitrobenzyl Compounds", Journal of Organic Chemistry, vol. 29, pp. 636-640, 1964.

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