Heat-sensitive recording material
AssigneeMitsubishi HiTec Paper Europe GmbH
InventorsClaas Boxhammer, Martin Schreer
Life of this patent
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Abstract
A heat-sensitive recording material having i) a carrier substrate and ii) a heat-sensitive recording layer. The heat-sensitive recording layer contains a color former and a color developer mixture and the color developer mixture contains a) N/-[2-(3-phenylureido)phenyl]benzole sulfonamide (compound of formula (I)). The compound of formula (I) is present in a crystalline form, which has an absorption band in the IR spectrum at 3401±20 cm−1, and b) N-(4-methylphenylsulfonyl)-N-(3-(4-methylphenylsulfonyloxy)phenyl)urea (compound of formula (II)).
Claims19
A heat-sensitive recording material, comprising:
- i) a supporting substrate;
- and
- ii) a heat-sensitive recording layer, comprising:
- a colour former;
- and
- a colour developer mixture that comprises:
- a) a compound of a formula (I)
- wherein the compound of the formula (I) is in a crystalline form having an absorption band at 3401±20 cm−1 in an IR spectrum, and
- b) a compound of a formula (II)
A method for producing a heat-sensitive recording material, comprising:
- i) providing or producing a supporting substrate;
- ii) providing or producing a coating composition comprising a compound of a formula (I)
- wherein the compound of the formula (I) is in a crystalline form having an absorption band at 3401±20 cm−1 in an IR spectrum, and
- b) a compound of the formula (II)
- iii) applying the coating composition provided or produced to the supporting substrate;
- and
- iv) drying the applied coating composition to form a heat-sensitive recording layer.
Dependencies are inferred from the claim text.