Heat sensitive coating
AssigneeLabelon Corporation
InventorBarry L. Marginean
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Abstract
A color forming heat sensitive coating composition comprising a color forming amount of a finely divided homogenous basic 3,3-bisarylphthalane derivative and a color developing amount of a finely divided solid phenyl derivative which at thermal printing temperature is at least partly fluidizable and capable of a color forming reaction with said 3,3-bisarylphthalane compound dispersed in a polyvinyl alcohol carrier is disclosed wherein the improvement comprises the addition of an anti-sticking amount of a functional filler which may be a di(lower alkyl)dithiocarbamate or lower alkylxanthate of lead, zinc, cadmium and alkaline earth metals or a tetra (lower alkyl)thiuram disulfide or a di(lower alkyl) xanthogen.
Claims9
In a color forming heat sensitive coating composition comprising a color forming amount of a finely divided homogenous basic 3,3'-bisarylphthalane derivative and a color developing amount of a finely divided solid phenyl derivative which at thermal printing temperature is at least partly fluidizable and capable of a color forming reaction with said 3,3-bisarylphthalane compound dispersed in a polyvinyl alcohol carrier, wherein the improvement comprises the presence of an antisticking amount of a functional filler of the general formula ##STR13## wherein X represents a bond or a metal selected from the group consisting of lead, zinc, cadmium and alkaline earth metal metals and Y represents lower alkyloxy or lower dialkylamino--therefor.
Dependencies are inferred from the claim text.