Composition for developing a visually discernible colour and corresponding heat-sensitive recording material
AssigneeMitsubishi HiTec Paper Europe GmbH
InventorsMatthias Neukirch, Nora Wilke nee Petersen
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Abstract
A composition for forming a visually discernible color, the use of this composition for producing a heat-sensitive recording material, the corresponding heat-sensitive recording material includes a substrate and this composition, and a process for producing the heat-sensitive recording material.
Claims17
A composition for forming a visually discernible color comprising:
- a) one, two, three or more color developers comprising in each instance one, two, three, or more than three structural units of formula (I)
- wherein, in each of the structural units of formula (I), z means an integer greater than 1, wherein the respective meaning is independent of the meaning in further structural units of formula (I) which may be present;
- b) one, two, three or more dye precursors for forming the visually discernible color through reaction with the color developer or color developers;
- and
- c) one, two or more compounds selected from the group comprising zinc salts, ammonium salts and zinc oxide.
A method of modifying the dynamic print density and/or the static print density, particularly for increasing the maximum dynamic print density and/or the maximum static print density of a mixture of one, two, three or more color developers and one, two, three or more dye precursors for forming a visually discernible color, said method comprising the step of:
- reacting one or more than one compound selected from the group comprising zinc salts, ammonium salts and zinc oxide with the color developer or color developers;
- wherein the one, two, three or more color developers, comprise in each instance one, two, three, or more than three structural units of formula (I)
- wherein, in each of the structural units of formula (I), z means an integer greater than 1, wherein the respective meaning is independent of the meaning in further structural units of formula (I) which may be present.
Dependencies are inferred from the claim text.