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 supporting substrate and ii) a heat-sensitive recording layer, where the heat-sensitive recording layer comprises a colour former and a colour developer mixture and the colour developer mixture comprises a) N-[2-(3-phenylureido)phenyl]benzenesulfonamide (compound of the formula (I)), where the compound of the formula (I) is in a crystalline form having an absorption band at 3401 □ 20 cm 1 in the IR spectrum, and b) N-(4-methylphenylsulfonyl)-N′-(3-(4-methylphenylsulfonyloxy)phenyl) urea (compound of the formula (II)), where the mass ratio between the compound of the formula (I) and the compound of the formula (II) is 0.5:99.5 to 35:65 or 99.5:0.5 to 65:35.
Claims11
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)
- where 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)
- wherein
- i) a mass ratio between the compound of the formula (I) and the compound of the formula (II) is at least one of:
- 0.5:99.5 to 35:65,
- 5:95 to 30:70, and
- 15:85 to 25:75
- or
- ii) the mass ratio between the compound of the formula (I) and the compound of the formula (II) is at least one of:
- 99.5:0.5 to 65:35,
- 97:3 to 85:15, and
- 95:5 to 90:10.
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)
- where 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)
- wherein the compounds of formula (I) and formula (II) improve the moisture resistance or lanolin resistance of a printed image of the heat-sensitive recording material, wherein:
- i) the mass ratio between the compound of the formula (I) and the compound of the formula (II) is at least one of:
- 0.5:99.5 to 35:65,
- 5:95 to 30:70, and
- 15:85 to 25:75
- or
- ii) the mass ratio between the compound of the formula (I) and the compound of the formula (II) is at least one of:
- 99.5:0.5 to 65:35,
- 97:3 to 85:15, and
- 95:5 to 90:10.
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 compound of the formula (I)
- where 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, wherein
- i) a mass ratio between the compound of the formula (I) and the compound of the formula (II) is at least one of:
- 0.5:99.5 to 35:65,
- 5:95 to 30:70, and
- 15:85 to 25:75
- or
- ii) the mass ratio between the compound of the formula (I) and the compound of the formula (II) is at least one of:
- 99.5:0.5 to 65:35,
- 97:3 to 85:15, and
- 95:5 to 90:10.
Dependencies are inferred from the claim text.