Pressure-and-heat-sensitive copying paper

Details Pressure-and-heat-sensitive copying paper Pressure-and-heat-sensitive copying paper

1980-05-27

1983-10-11

Herbert, Jr., Thomas J.

Stock material or miscellaneous articles

Composite

Of carbohydrate

162162, 282 275, 427146, 427148, 427150, 427151, 4283204, 4283206, 4283208, 428913, 428914, 549223, B32B 2900, B41C 106, B41M 516, B41M 518

Patent

active

RE0314129

ABSTRACT:
A heat or pressure sensitive copying paper is provided containing a fluoran compound as a color former, said color being developed in said heat or pressure sensitive copying paper through the application of heat or pressure, said fluoran compound being of the formula ##STR1## wherein R.sub.1 is halogen; R.sub.2 is hydrogen or methyl; R.sub.3 is hydrogen, methyl or ethyl; each of R.sub.4 is independently halogen or methyl; R.sub.5 is methyl or ethyl; and n is 0 or an integer from 1 to 4.

REFERENCES:
patent: 3669712 (1972-06-01), Kimura et al.
patent: 3681390 (1972-08-01), Lin
patent: 3746562 (1973-07-01), Lin
patent: 3764369 (1973-10-01), Hoover et al.
patent: 3825561 (1974-07-01), Akamatsu et al.

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