Microcapsules containing dye precursor and resin in...

Details Microcapsules containing dye precursor and resin in... Microcapsules containing dye precursor and resin in...

B - Operations, Transporting

01

J

42/15, 117/46.5

B01J 13/02 (2006.01) B41M 5/165 (2006.01)

Patent

CA 1057139

ABSTRACT OF THE DISCLOSURE Disclosed is a process for preparing improved micro- capsules 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 with- in individual, rupturable, generally continuous polyamide shells formed thereabout. The process comprises the step of incor- porating in the fill material, an amount of an epoxy resin or a polystyrene resin effective to render the microcapsules re- sistent to inadvertent release and transfer of the fill material.

229890

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