Record material carrying a color developer composition

Details Record material carrying a color developer composition Record material carrying a color developer composition

1981-06-11

1983-07-05

Hess, Bruce H.

Coating processes

Transfer or copy sheet making

Reactive components

282 275, 427151, 427201, 427204, 427212, 427214, 427217, 427219, 4283204, 428329, 428331, 428341, 428342, 428913, 428914, B41M 516, B41M 518, B41M 522

Patent

active

043918506

ABSTRACT:
A color developer for use in a pressure- or heat-sensitive record material comprises a particulate amorphous hydrated silica/hydrated alumina composite in which the hydrated silica and hydrated alumina are chemically bound, in which hydrated silica predominates, in which the mean alumina content on a dried weight basis is at least 7.5%, based on the total weight of silica and alumina, and in which the surface area is below 300 m.sup.2 g.sup.-1. The composite may be metal-modified.

REFERENCES:
patent: 3736285 (1973-05-01), Miller
patent: 4289806 (1981-09-01), Sato et al.

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