Product and process for reducing discoloration in carbonless cop

Details Product and process for reducing discoloration in carbonless cop Product and process for reducing discoloration in carbonless cop

1976-12-22

1979-02-20

Herbert, Jr., Thomas J.

Textiles: manufacturing

252316, 427151, 428307, 428327, 428511, 428513, 428537, 428914, B41M 512, B41M 516, B01J 1302

Patent

active

041403363

ABSTRACT:
Disclosed is a process for preparing improved microcapsules which are useful in connection with carbonless copying systems. Also disclosed are the microcapsules themselves which comprise minute discrete droplets of liquid fill material including an initially colorless chemically reactive color forming dye precursor and a carrier therefor encapsulated within individual, rupturable, generally continuous polyamide shells formed thereabout. The process comprises the step of incorporating in the fill material, an amount of an epoxy resin or a polystyrene resin effective to render the microcapsules resistent to inadvertent release and transfer of the fill material.

REFERENCES:
patent: 2712507 (1955-07-01), Green
patent: 3455721 (1969-07-01), Phillips et al.
patent: 3617334 (1971-11-01), Brockett et al.
patent: 3625736 (1971-12-01), Matsukawa et al.
patent: 3996156 (1976-12-01), Matsukawa et al.
patent: 3996406 (1976-12-01), Alsop
patent: 4000087 (1976-12-01), Maalouf

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