Pressure-sensitive copying paper containing lactone compounds of

Details Pressure-sensitive copying paper containing lactone compounds of Pressure-sensitive copying paper containing lactone compounds of

1974-07-24

1976-02-03

Herbert, Jr., Thomas J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

282 275, 427145, 427261, 428323, 428325, 428454, B41M 516

Patent

active

039365646

ABSTRACT:
A pressure-sensitive copying paper comprising an adsorbent solid acid and a microencapsulated color former capable of forming a distinct color when reacted with the adsorbent acid coated on the same or a different surface of a support or supports, the microencapsulated color former being at least one lactone compound of a pyridine-carboxylic acid represented by the formula ##SPC1##
Or a mixture thereof, wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and A are as defined hereinafter, is disclosed.

REFERENCES:
patent: 3775424 (1973-11-01), Farber
patent: 3853869 (1974-12-01), Farber

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