Heat sensitive recording materials

Record receiver having plural interactive leaves or a colorless – Having a colorless color-former – developer therefor – or... – Having constituent defined in terms of melting temperature

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Details

427150, 42840221, 42840222, 428913, 503209, 503215, 503226, B41M 518

Patent

active

047496797

ABSTRACT:
This invention discloses a heat sensitive recording material having a heat sensitive layer on a support; either of a color forming material or a developer which are contained in the heat sensitive layer is encased in a microcapsule. Since a plasticizer for a wall material of the microcapsule and a compound having an effect to depress the melting point of at least one member out of developers, a color forming reaction is carried out smoothly under a recording condition, therefore, a density of an obtained image is sufficient. Especially good results are obtained when a macromolecule substance selected from a group of polyurethane, polyurea, polyamide, polyester and polycarbonate is used as a wall material of the microcapsule. A coloring reaction assistant may be contained in any place of the heat sensitive layer.
A preferable plasticizer can be selected from a group of phenols, alcohols, ureas, sulfonamides, carbamates and aromatic methoxy compounds.

REFERENCES:
patent: 4644376 (1987-02-01), Usami et al.

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