EP3148816A1 - Heat-sensitive recording material - Google Patents
Heat-sensitive recording materialInfo
- Publication number
- EP3148816A1 EP3148816A1 EP15726926.7A EP15726926A EP3148816A1 EP 3148816 A1 EP3148816 A1 EP 3148816A1 EP 15726926 A EP15726926 A EP 15726926A EP 3148816 A1 EP3148816 A1 EP 3148816A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat
- recording material
- sensitive recording
- methyl
- color
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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- CIUQDSCDWFSTQR-UHFFFAOYSA-N [C]1=CC=CC=C1 Chemical compound [C]1=CC=CC=C1 CIUQDSCDWFSTQR-UHFFFAOYSA-N 0.000 claims description 20
- -1 N-ethyl-N-isoamylamino Chemical group 0.000 claims description 19
- 238000003860 storage Methods 0.000 claims description 18
- 239000000725 suspension Substances 0.000 claims description 16
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- XVSRGZPKJKLORS-UHFFFAOYSA-N 1-(4-methylphenyl)sulfonyl-3-[4-[[4-[(4-methylphenyl)sulfonylcarbamoylamino]phenyl]methyl]phenyl]urea Chemical compound C1=CC(C)=CC=C1S(=O)(=O)NC(=O)NC(C=C1)=CC=C1CC(C=C1)=CC=C1NC(=O)NS(=O)(=O)C1=CC=C(C)C=C1 XVSRGZPKJKLORS-UHFFFAOYSA-N 0.000 claims description 2
- JFNWGAYGVJGNBG-UHFFFAOYSA-N 2'-anilino-3'-methyl-6'-pyrrolidin-1-ylspiro[2-benzofuran-3,9'-xanthene]-1-one Chemical compound CC1=CC=2OC3=CC(N4CCCC4)=CC=C3C3(C4=CC=CC=C4C(=O)O3)C=2C=C1NC1=CC=CC=C1 JFNWGAYGVJGNBG-UHFFFAOYSA-N 0.000 claims description 2
- NHCBGOLCVIYTMT-UHFFFAOYSA-N 3-ethoxy-n-ethylpropan-1-amine Chemical compound CCNCCCOCC NHCBGOLCVIYTMT-UHFFFAOYSA-N 0.000 claims description 2
- 239000011230 binding agent Substances 0.000 claims description 2
- HLSDMLXXPIEJFI-UHFFFAOYSA-N n-(oxolan-2-ylmethyl)ethanamine Chemical compound CCNCC1CCCO1 HLSDMLXXPIEJFI-UHFFFAOYSA-N 0.000 claims description 2
- FNLUJDLKYOWMMF-UHFFFAOYSA-N n-ethyl-2-methylpropan-1-amine Chemical compound CCNCC(C)C FNLUJDLKYOWMMF-UHFFFAOYSA-N 0.000 claims description 2
- 239000007858 starting material Substances 0.000 claims description 2
- NIHNNTQXNPWCJQ-UHFFFAOYSA-N fluorene Chemical compound C1=CC=C2CC3=CC=CC=C3C2=C1 NIHNNTQXNPWCJQ-UHFFFAOYSA-N 0.000 claims 2
- 239000000654 additive Substances 0.000 claims 1
- AAAQKTZKLRYKHR-UHFFFAOYSA-N triphenylmethane Chemical compound C1=CC=CC=C1C(C=1C=CC=CC=1)C1=CC=CC=C1 AAAQKTZKLRYKHR-UHFFFAOYSA-N 0.000 claims 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 abstract 2
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- KZTYYGOKRVBIMI-UHFFFAOYSA-N diphenyl sulfone Chemical compound C=1C=CC=CC=1S(=O)(=O)C1=CC=CC=C1 KZTYYGOKRVBIMI-UHFFFAOYSA-N 0.000 description 4
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- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 4
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- 125000003118 aryl group Chemical group 0.000 description 2
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- ZFMQKOWCDKKBIF-UHFFFAOYSA-N bis(3,5-difluorophenyl)phosphane Chemical compound FC1=CC(F)=CC(PC=2C=C(F)C=C(F)C=2)=C1 ZFMQKOWCDKKBIF-UHFFFAOYSA-N 0.000 description 2
- WOZVHXUHUFLZGK-UHFFFAOYSA-N dimethyl terephthalate Chemical compound COC(=O)C1=CC=C(C(=O)OC)C=C1 WOZVHXUHUFLZGK-UHFFFAOYSA-N 0.000 description 2
- 150000002170 ethers Chemical class 0.000 description 2
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- HSEMFIZWXHQJAE-UHFFFAOYSA-N hexadecanamide Chemical compound CCCCCCCCCCCCCCCC(N)=O HSEMFIZWXHQJAE-UHFFFAOYSA-N 0.000 description 2
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- LJSLYKNKVQMIJY-UHFFFAOYSA-N 1,4-diethoxynaphthalene Chemical compound C1=CC=C2C(OCC)=CC=C(OCC)C2=C1 LJSLYKNKVQMIJY-UHFFFAOYSA-N 0.000 description 1
- BBQLCKFJEDETJU-UHFFFAOYSA-N 1-(4-methylphenyl)sulfonyl-3-phenylurea Chemical compound C1=CC(C)=CC=C1S(=O)(=O)NC(=O)NC1=CC=CC=C1 BBQLCKFJEDETJU-UHFFFAOYSA-N 0.000 description 1
- BGLZECVIKIGPIF-UHFFFAOYSA-N 1-[2-(benzenesulfonamido)phenyl]-3-phenylurea Chemical group C=1C=CC=C(NS(=O)(=O)C=2C=CC=CC=2)C=1NC(=O)NC1=CC=CC=C1 BGLZECVIKIGPIF-UHFFFAOYSA-N 0.000 description 1
- VITPICOSHHCBFU-UHFFFAOYSA-N 1-sulfonylguanidine Chemical class NC(=N)N=S(=O)=O VITPICOSHHCBFU-UHFFFAOYSA-N 0.000 description 1
- FPIAKQHHSBQHDE-UHFFFAOYSA-N 2-methylprop-2-enoic acid;prop-2-enamide;prop-2-enoic acid Chemical compound NC(=O)C=C.OC(=O)C=C.CC(=C)C(O)=O FPIAKQHHSBQHDE-UHFFFAOYSA-N 0.000 description 1
- XCSGHNKDXGYELG-UHFFFAOYSA-N 2-phenoxyethoxybenzene Chemical compound C=1C=CC=CC=1OCCOC1=CC=CC=C1 XCSGHNKDXGYELG-UHFFFAOYSA-N 0.000 description 1
- WLTCCDHHWYAMCG-UHFFFAOYSA-N 2-phenylmethoxynaphthalene Chemical compound C=1C=C2C=CC=CC2=CC=1OCC1=CC=CC=C1 WLTCCDHHWYAMCG-UHFFFAOYSA-N 0.000 description 1
- PFANXOISJYKQRP-UHFFFAOYSA-N 2-tert-butyl-4-[1-(5-tert-butyl-4-hydroxy-2-methylphenyl)butyl]-5-methylphenol Chemical compound C=1C(C(C)(C)C)=C(O)C=C(C)C=1C(CCC)C1=CC(C(C)(C)C)=C(O)C=C1C PFANXOISJYKQRP-UHFFFAOYSA-N 0.000 description 1
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- PRMDDINQJXOMDC-UHFFFAOYSA-N 4-[4,4-bis(5-cyclohexyl-4-hydroxy-2-methylphenyl)butan-2-yl]-2-cyclohexyl-5-methylphenol Chemical compound C=1C(C2CCCCC2)=C(O)C=C(C)C=1C(C)CC(C=1C(=CC(O)=C(C2CCCCC2)C=1)C)C(C(=CC=1O)C)=CC=1C1CCCCC1 PRMDDINQJXOMDC-UHFFFAOYSA-N 0.000 description 1
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- WTHKAJZQYNKTCJ-UHFFFAOYSA-N 4-methyl-N-(phenylmethyl)benzenesulfonamide Chemical compound C1=CC(C)=CC=C1S(=O)(=O)NCC1=CC=CC=C1 WTHKAJZQYNKTCJ-UHFFFAOYSA-N 0.000 description 1
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- HEVGMYPGMWZOBU-UHFFFAOYSA-N [3-[(4-methylphenyl)sulfonylcarbamoylamino]phenyl] 4-methylbenzenesulfonate Chemical compound C1=CC(C)=CC=C1S(=O)(=O)NC(=O)NC1=CC=CC(OS(=O)(=O)C=2C=CC(C)=CC=2)=C1 HEVGMYPGMWZOBU-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
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- BPLKDVGMXNZCQO-UHFFFAOYSA-N benzyl 4-phenylmethoxybenzoate Chemical compound C=1C=C(OCC=2C=CC=CC=2)C=CC=1C(=O)OCC1=CC=CC=C1 BPLKDVGMXNZCQO-UHFFFAOYSA-N 0.000 description 1
- QWHCTYYBLDCYIT-UHFFFAOYSA-N bis[(4-chlorophenyl)methyl] oxalate Chemical compound C1=CC(Cl)=CC=C1COC(=O)C(=O)OCC1=CC=C(Cl)C=C1 QWHCTYYBLDCYIT-UHFFFAOYSA-N 0.000 description 1
- FPFZBTUMXCSRLU-UHFFFAOYSA-N bis[(4-methylphenyl)methyl] oxalate Chemical compound C1=CC(C)=CC=C1COC(=O)C(=O)OCC1=CC=C(C)C=C1 FPFZBTUMXCSRLU-UHFFFAOYSA-N 0.000 description 1
- 235000010216 calcium carbonate Nutrition 0.000 description 1
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- WCYWZMWISLQXQU-UHFFFAOYSA-N methyl Chemical compound [CH3] WCYWZMWISLQXQU-UHFFFAOYSA-N 0.000 description 1
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- XAUGWFWQVYXATQ-UHFFFAOYSA-N n-phenylbenzenesulfonamide Chemical compound C=1C=CC=CC=1S(=O)(=O)NC1=CC=CC=C1 XAUGWFWQVYXATQ-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
- B41M5/333—Colour developing components therefor, e.g. acidic compounds
- B41M5/3333—Non-macromolecular compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/30—Processes for applying liquids or other fluent materials performed by gravity only, i.e. flow coating
- B05D1/305—Curtain coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
- B41M5/323—Organic colour formers, e.g. leuco dyes
- B41M5/327—Organic colour formers, e.g. leuco dyes with a lactone or lactam ring
- B41M5/3275—Fluoran compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
- B41M5/337—Additives; Binders
- B41M5/3375—Non-macromolecular compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
- B41M5/323—Organic colour formers, e.g. leuco dyes
Definitions
- the present invention relates to a heat-sensitive recording material comprising a support substrate and a heat-sensitive color-forming layer containing at least a color former and at least one phenol-free color developer, a process for producing the same, and the use of the phenol-free color developer contained in the heat-sensitive recording material.
- Thermosensitive recording materials for the direct thermal printing application which have a heat-sensitive color-forming layer (thermal reaction layer) applied to a support substrate have been known for a long time.
- a color former and a color developer are usually present, which react with one another under the action of heat and thus lead to a color development.
- heat-sensitive recording materials containing a non-phenolic color developer in the heat-sensitive color-forming layer have been developed to improve the durability of the typeface, especially when the printed thermosensitive recording material is stored for a long time or comes into contact with hydrophobic substances such as plasticized materials or oils.
- EP 0 620 122 Bl discloses non-phenolic color developers of the aromatic sulfonylurea class. With these, heat-sensitive recording materials excellent in image resistance can be obtained. Further, the heat-sensitive recording materials based on these color developers have useful thermal sensitivity with good surface white, so that, with appropriate formulation of the heat-sensitive color-forming layer, it is comparatively easy to produce high print densities using commercial thermal printers. In practice, especially 4,4'-bis (p-tolylsulfonyIureido) diphenylmethane (B-TUM) and N '- (p-toluenesulfonyl) -N-phenyl-urea (TUPH) have prevailed.
- B-TUM 4,4'-bis (p-tolylsulfonyIureido) diphenylmethane
- TUPH N '- (p-toluenesulfonyl) -N-phenyl-urea
- N- (p-tolylsulfonyl) -N '- (3-p-tolylsulfonyloxy-phenyl) urea (trade name Pergafast 201 ® , PF201 BASF) is characterized by the balance of the application technology Properties of the heat-sensitive recording materials produced with this. In particular, they have good dynamic responsiveness and high resistance to hydrophobic expression.
- heat-sensitive recording materials pay particular attention to the following aspects: a) the stability of the unprinted ("white”) heat-sensitive recording material in case of long-term storage and / or severe climatic conditions, in particular with regard to the retention of the specified values of the dynamic response sensitivity and White, and b) the resistance of the typeface generated by the thermal pressure, which in particular is intended to withstand the (even longer-term) effect of temperature, atmospheric oxygen, light, moisture, hydrophobic agents, etc. (archiving capability).
- the requirements mentioned under a) concern the constancy of the composition of the heat-sensitive color-forming layer, in particular the chemical resistance of the color-forming components, even during long-term storage and under severe climatic conditions
- the requirements mentioned under b) are aimed at the stability of the during the printing process in the heat-sensitive color-forming layer forming color complex.
- thermosensitive recording materials with color developers based on sulfonylureas meet the requirements mentioned under b), but show weaknesses in terms of the requirements listed under a).
- the sulfonyl ureas are chemically unstable, especially in the presence of water. This tendency to decompose the sulfonyl ureas over a wide pH range is known and well documented (A.K. Sarmah, J. Sabadie, J. Agric. Food Chem., 50, 6253 (2002)).
- the object of the present invention is to overcome the above-described disadvantages of the prior art.
- the object of the present invention is to provide a heat-sensitive recording material, which also meets the requirements mentioned under a), that is, the performance required functional properties, such as thermal sensitivity andrapnweisse, even when stored for long periods and under aggravated climatic conditions.
- the object therefore relates to the property profile of an unprinted heat-sensitive recording material.
- a heat-sensitive color-forming layer comprising at least one color former and at least one phenol-free color developer, and characterized in that the at least one color developer comprises a compound of the formula (I)
- Ari and Ar 2 are a phenyl radical and / or a C 1 -C 4 -alkyl-substituted phenyl radical.
- At least one further intermediate layer is present between the carrier substrate and the heat-sensitive layer. It is also possible for at least one protective layer and / or at least one printability-promoting layer to be present in the heat-sensitive recording material according to the invention.
- the C 1 -C 4 -alkyl-substituted phenyl radical is preferably a C 1 -C 4 -alkyl-substituted phenyl radical (ortho, meta and / or para-substituted), in particular a para-substituted C 1 -C 4 -alkyl radical. substituted phenyl radical.
- a methyl radical most preferably a para-methyl radical.
- Ari and Ar 2 are a para-methyl-substituted phenyl radical.
- Ari is a phenyl radical and Ar 2 is a para-methyl-substituted phenyl radical.
- Ari and Ar 2 are each a phenyl radical, that is to say the at least one color developer is N- (2- (3-phenylureido) phenyl) benzenesulfonamide.
- 0.5 to about 10 parts by weight preferably about 1.5 to about 4 parts by weight, of the compound of formula (I), based on the color former before.
- Levels below 0.5 parts by weight have the disadvantage that the desired thermal pressure sensitivity is not achieved, while amounts of more than 10 parts by weight cause the economy of the recording material suffers, without application-related improvements could be achieved.
- the compound of the formula (I) is preferably in an amount of about 3 to about 35 wt .-%, more preferably in an amount of about 10 to about 25 Wt .-%, based on the total solids content of the heat-sensitive layer, before.
- the selection of the carrier substrate is not critical. However, it is preferred to use paper, synthetic paper and / or a plastic film as the carrier substrate.
- the color former is preferably a triphenylmethane-type, fluoran-type, azaphthalide-type and / or fluorene-type dye.
- a particularly preferred color former is a fluoran-type dye because of its availability and balanced application properties
- fluoran-type dyes are:
- one or more further non-phenolic color developers are present in the heat-sensitive color-forming layer.
- the one or more other non-phenolic color developers are preferably N '- (p-toluenesulfonyl) -N'-phenylurea, N- (p-) Toluenesulfonyl) -N'-3- (p-toluenesulphonyl-oxy-phenyl) -urea and / or 4,4'-bis (p-tolylsulfonylureido) -diphenylmethane.
- the heat-sensitive recording material according to the invention is a
- heat-sensitive recording material comprising a carrier substrate and at least one color former, at least one phenol-free
- the at least one color developer comprises a compound of the formula (I)
- Ar, and Ar 2 are a phenyl radical and / or a Q-alkyl-substituted phenyl radical, wherein the heat-sensitive recording materials 42 and 43 of WO 2014/080615 are excluded, wherein the carrier substrate is paper,
- the at least one color former is a fluoran-type dye.
- one or more sensitizers may be present in the heat-sensitive color-forming layer, which has the advantage that the control of the thermal pressure sensitivity is easier to implement.
- suitable sensitizing agents are substances whose melting point is between about 90 and about 150 ° C. and which in the molten state dissolve the color-forming components (color former and color developer) without disturbing the formation of the color complex.
- the sensitizer is a fatty acid amide, such as stearamide, behenamide or palmitamide, an ethylene-bis-fatty acid amide, such as N, N'-ethylene-bis-stearic acid amide or ⁇ , ⁇ '-ethylene-bis-oleic acid amide, a wax, such as polyethylene. wax or montan wax, a carboxylic acid ester such as dimethyl terephthalate,
- an aromatic ether such as 1,2-diphenoxy-ethane, l, 2-di- (3-methylphenoxy) ethane, 2-benzyloxynaphthalene or 1,4- Diethoxynaphthalene
- At least one stabilizer is present in the heat-sensitive color-forming layer.
- the stabilizer is preferably sterically hindered phenols, more preferably l, l, 3-tris (2-methyl-4-hydroxy-5-cyclohexyl-phenyl) -butane, l, l, 3-tris ( 2-methyl-4-hydroxy-5-tert-butylphenyl) butane, 1,1-bis (2-methyl-4-hydroxy-5-tert-butyl-phenyl) -butane.
- the stabilizer is preferably present in an amount of from 0.2 to 0.5 parts by weight, based on the at least one phenol-free color developer of the compound of the formula (I).
- At least one binder is present in the heat-sensitive color-forming layer.
- binder are preferably water-soluble starches, starch derivatives, methylcelluiose, hydroxyethylcellulose, carboxymethylcelluloses, partially or completely saponified polyvinyl alcohols, chemically modified polyvinyl alcohols or
- Styrene maleic anhydride copolymers styrene butadiene copolymers, acrylamide (meth) acrylate copolymers, acrylamide acrylate methacrylate terpolymers,
- At least one release agent (anti-sticking agent) or lubricant is present in the heat-sensitive color-forming layer.
- agents are preferably fatty acid metal salts, e.g. Zinc stearate or calcium stearate, or else behenate salts, synthetic waxes, e.g. in the form of fatty acid amides, e.g. Stearic acid amide and behenic acid amide, fatty acid alkanolamides, e.g. Stearic acid methylolamide, paraffin waxes of various melting points, ester waxes of different molecular weights, ethylene, waxes, propylene waxes of different hardnesses and / or natural waxes, such as. Carnauba wax or montan wax.
- the heat-sensitive color-forming layer contains pigments.
- pigments have the advantage, among other things, that they can fix the chemical melt produced in the thermal printing process on their surface. It is also possible to use pigments to control the surface whiteness and opacity of the heat-sensitive color-forming layer and its printability with conventional printing inks. Finally, pigments have an "extender function", for example, for the relatively expensive coloring functional chemicals.
- Particularly suitable pigments are inorganic pigments, both of synthetic and natural origin, preferably clays, precipitated or natural calcium carbonates, aluminum oxides, aluminum hydroxides, silicas, diatheneric, magnesium, talc, but also organic pigments, such as hollow pigments with a styrene / acrylate copolymer Wall or urea / formaldehyde condensation polymers.
- organic pigments such as hollow pigments with a styrene / acrylate copolymer Wall or urea / formaldehyde condensation polymers.
- optical brighteners may be incorporated in the heat-sensitive color-forming layer. These are preferably stilbenees.
- the dried heat-sensitive color-forming layer is subjected to a leveling action such that the Bekk smoothness is adjusted to about 100 to about 1200 seconds, more preferably about 300 to 700 seconds (measured according to DIN 53101).
- the surface application weight of the (dry) heat-sensitive layer is preferably about 1 to about 10 g / m 2 , preferably about 3 to about 6 g / m 2 .
- the heat-sensitive recording material is one according to claim 2, wherein a colorant of the flurane type is used and additionally a sensitizer selected from the group consisting of fatty acid amides, aromatic sulfones and / or aromatic ethers , is present.
- a sensitizer selected from the group consisting of fatty acid amides, aromatic sulfones and / or aromatic ethers .
- the heat-sensitive recording material according to the invention can be obtained by known production methods.
- the recording material of the present invention by a method of applying and drying, on a support substrate, an aqueous suspension containing the starting materials of the heat-sensitive color-forming layer, the aqueous coating suspension having a solid content of about 20 to about 75% by weight. , preferably from about 30 to about 50% by weight, coated and dried by the curtain coating process at an operating speed of the coater of at least about 400 m / min.
- This method is particularly advantageous from an economic point of view.
- the heat-sensitive recording material according to the invention by means of a process in which the aqueous coating suspension is applied by the curtain-coating process at an operating speed of the coating unit of at least about 400 m / min.
- the so-called curtain-coating method is known to the person skilled in the art and is characterized by the following criteria:
- the setting of the operating speed of the coater to at least about 400 m / min has both economic and technical advantages.
- the operating speed is particularly preferably at least about 750 m / min, very particularly preferably at least about 1000 m / min and very particularly preferably at least about 1500 m / min. It was particularly surprising that even at the latter speed, the resulting heat-sensitive recording material is impaired in any way and that the operation is carried out optimally even at this high speed.
- the aqueous deaerated application suspension has a viscosity of about 150 to about 800 mPas (Brookfield, 100 rpm, 20 ° C).
- the viscosity of the aqueous deaerated application suspension is about 200 to about 500 mPas.
- the surface tension of the aqueous application suspension can be adjusted to about 25 to about 60 mN / m, preferably about 35 to about 50 mN / m (measured according to the static ring method according to Du Noüy, DIN 53914) ,
- the formation of the heat-sensitive color-forming layer can be done on-line or in a separate coating process off-line. This also applies to any subsequently applied layers or intermediate layers.
- the dried heat-sensitive color-forming layer is subjected to a smoothing action. It is advantageous here to adjust the Bekk smoothness, measured to DIN 53101, to about 100 to about 1200 seconds, preferably to about 300 to about 700 seconds.
- the present invention also relates to a heat-sensitive recording material obtainable by the above-described method.
- the invention also relates to the use of the compound of the formula (I)
- Ari and Ar 2 are a phenyl radical and / or a C 1 -C 4 alkyl-substituted phenyl radical, preferably each a phenyl radical, as a non-phenolic color developer in a heat-sensitive recording material.
- Ari and Ar 2 are a phenyl radical and / or a C 1 -C 4 alkyl-substituted phenyl radical, preferably each a phenyl radical, as a non-phenolic color developer in a heat-sensitive recording material.
- thermosenor in particular the storage stability at high temperatures and high ambient humidity.
- high temperatures are meant temperatures of from about 25 to about 60 ° C, preferably from about 30 to about 50 ° C.
- High ambient humidity is understood to mean a moisture content of about 50 to about 100%, preferably of about 70 to about 90%.
- the present invention provides a heat-sensitive recording material which, in addition to a desirably high dynamic pressure sensitivity, also exhibits exceptionally good storage stability, especially under conditions of high storage temperature and ambient humidity, without the functional properties necessary for the application, such as, for example, surface whiteness and thermal Responsiveness, lost.
- the above-described method is advantageous from an economic point of view and allows a high process control of the coater even at a speed of more than 1500 m / min, without it
- Impairment of the process product that is, the heat-sensitive recording material according to the invention comes.
- the process can be done on-line and off-line, resulting in desirable flexibility.
- the heat-sensitive recording material according to the invention is phenol-free, and well suited for POS (point-of-sale) and / or label applications. It is also suitable for the production of tickets, entrance tickets, lottery and betting slips, etc., which can be printed using direct thermal processes and a high resistance of the images recorded thereon under long-term storage, even under severe climatic conditions with respect to temperature and ambient humidity, and of the Contact-bringing the typeface with hydrophobic substances, such as plasticizers, greasy or oily substances, etc., guaranteed.
- the application of an aqueous application suspension to form the heat-sensitive color-forming layer of a heat-sensitive recording paper was carried out on a laboratory scale by means of a bar blade on one side of a synthetic base paper (Yupo® FP680) of 63 g / m 2 . After drying, a thermal recording sheet was obtained.
- the application amount of the heat-sensitive color-forming layer was from 4.0 to 4.5 g / m 2.
- the aqueous application suspension was applied to a paper web having a basis weight of 43 g / m 2 by means of the curtain-coating process.
- the viscosity of the aqueous coating suspension was 450 mPas (Brookfield, 100 rpm, 20 ° C.) (in the deaerated state). Their surface tension was 46 mN / m (statistical ring method).
- the coating was arranged in-line. The curtain coating process was operated at a speed of 1550 m / min.
- the drying process of the coated paper support was carried out in a customary manner.
- the basis weight of the dry heat-sensitive layer was 4.0 - 4.5 g / m 2 .
- a heat-sensitive recording material or thermal paper was prepared, wherein the following formulations of aqueous application suspensions were used to form a composite structure on a support substrate and then the other layers, in particular a protective layer were formed in a conventional manner, which is not discussed separately here shall be.
- An aqueous coating suspension was prepared by mixing an aqueous dispersion of the color former prepared by milling 20 parts by weight of 3-Nn-dibutylamine-6-methyl-7-anilinofluoran (ODB-2) with 33 parts by weight of a 15%.
- ODB-2 3-Nn-dibutylamine-6-methyl-7-anilinofluoran
- aqueous solution of Ghosenex TM L-3266 (sulfonated polyvinyl alcohol, Nippon Ghosei) in a bead mill
- a dispersion prepared by milling 40 parts by weight sensitizer with 33 parts by weight of a 15% aqueous solution of Ghosenex TM L-3266 in a mill 189 parts by weight of a 56% PCC dispersion (precipitated calcium carbonate), 50 parts by weight of an aqueous 20% zinc stearate dispersion, 138 parts by weight of a 10% strength aqueous polyvinyl alcohol solution (Mowiol 28-99, Kuraray Europe) were mixed well.
- An aqueous coating suspension was prepared by mixing an aqueous dispersion of the color former prepared by milling 20 parts by weight of 3-Nn-dibutylamine-6-methyl-7-anilinofluoran (ODB-2) with 33 parts by weight of a 15%.
- ODB-2 3-Nn-dibutylamine-6-methyl-7-anilinofluoran
- aqueous solution of Ghosenex TM L-3266 in a bead mill an aqueous color developer dispersion obtained by milling 40 parts by weight of the color developer together with 33 parts by weight of a 15% aqueous solution of Ghosenex TM L - 3266 in the Perl mill, a dispersion prepared by milling 40 parts by weight sensitizer with 33 parts by weight of a 15% aqueous solution of Ghosenex TM L-3266 in a mill, 200 wt.
- An aqueous coating suspension was prepared by mixing an aqueous dispersion of the color former prepared by milling 20 parts by weight of 3-Nn-dibutylamine-6-methyl-7-anilinofluoran (ODB-2) with 33 parts by weight of a 15%.
- ODB-2 3-Nn-dibutylamine-6-methyl-7-anilinofluoran
- aqueous solution of Ghosenex TM L-3266 L3266 in a bead mill an aqueous color developer dispersion prepared by milling 40 parts by weight of the color developer together with 33 parts by weight of a 15% aqueous solution of Ghosenex TM L-3266 in the Perl mill, a dispersion prepared by milling 40 parts by weight sensitizer with 33 parts by weight of a 15% aqueous solution of Ghosenex TM L-3266 in a mill, a dispersion made by milling 12.5 parts by weight of anti-aging with 10 parts by weight of a 15% aqueous solution of Ghosenex TM L-3266 in a mill, 174 parts by weight of a 56% PCC dispersion (Precipitated calcium carbonate), 50 parts by weight of an aqueous 20% zinc stearate, 138 parts by weight of a 10% aqueous polyvinyl alcohol solution (Mowiol 28-99) were mixed well.
- the particle size distribution was measured by laser diffraction with a Coulter LS230 instrument from Beckman Coulter.
- thermal recording materials shown in Tables 1, 2 and 3 were evaluated as follows.
- Paper white on the line side was determined according to DIN / ISO 2470 with a Elrepho 3000 spectrophotometer
- the papers (6 cm wide strips) were thermally scanned using the Atlantek 200 test printer (Atlantek, USA) with a Kyocera print bar of 200 dpi and 560 ohms at an applied voltage of 20.6 V and a maximum pulse width of 0.8 ms printed with a chessboard pattern with 10 energy gradations.
- the image density (optical density, o.D.) was measured with a Macbeth densitometer RD-914, by Gretag.
- a sheet of recording paper is cut into three identical strips.
- a stripe is dynamically recorded and the image density determined according to the method of (2).
- the other two strips are in the unprinted (white) state for 4 weeks a climate of 40 ° C and 85% rel. Humidity (climate 1) or of 60 ° C and 50% rel. Humidity (climate 2) exposed.
- After air conditioning the papers they are dynamically printed according to the method of (2) and the image density determined with the densitometer.
- The% change of the writing performance in printing the stored patterns was calculated according to the following equation (I).
- a plasticizer-containing cling film PVC film with 20-25% dioctyl adipate
- the image density was measured and set in accordance with the formula (II) in relation to the corresponding image density values before the WM exposure.
- Sample preparation From the paper sample, 2 circular surfaces are punched out and weighed with a punching iron. The paper samples are extracted with 3 ml of acetonitrile (HPLC grade) in an ultrasonic bath for 30 min and the extract is filtered through a PTFE syringe filter (0.45 pm).
- Quantitative analysis of the chromatograms takes place via the area comparison of the sample peaks assigned over tr times with a calibration straight line determined via the reference patterns.
- the measurement error in the HPLC quantification is ⁇ 2%.
- Table 4 summarizes the evaluation of the papers according to recipe 1 (Table 1), grinding series 1, Table 5, the evaluation of the papers according to recipe 1 (Table 1), grinding series 2, and Table 6 the evaluation of the papers according to recipe 2a or 2b (Table 3), Mahlserie 2, together.
- climate 1 Storage of the unprinted papers for 4 weeks at 40 ° C and 85% RH.
- climate 2 Storage of the unprinted papers for 4 weeks at 60 ° C and 50% RH.
- the quantitative determination of the color developer in the fresh and stored papers was made and as a control, the corresponding determination of the color former as a coating component experiences experience virtually no change over the storage time.
- the values of the plasticizer test quantify the durability of the printed image under the influence of dioctyl adipate (representative of hydrophobic agents) by the% change in the maximum writing power (o.D. max.) During the test.
- AI-1 formulation AI (Table 1), grinding series 1 (Table 3)
- the heat-sensitive recording material of the present invention exhibits, in particular, the following advantageous properties:
- the heat-sensitive recording material of the present invention exhibits practically the same writing power before and after the four-week storage in the unprinted state under two different storage conditions.
- the waste of max. Print density is in all papers with the invention
- Color developer ⁇ 10% of the print density of the fresh papers (CI-1, CII-1, CIII-1, CI-2, CII-2, CIII-2, FI-1, FI-2, FII-1, FII-2, FIII-1, FIII-2).
- the comparative materials AI-1, AII-1, AIII-1, BI-1, BII-1, BIII-1, DI-1, DII-1, DIII-1, EI-1, EI-2, EII- 1, EII-2, EIII-1, EIII-2 significant losses of writing power.
- the recorded image of the heat-sensitive papers according to the invention with the color developer according to the invention has a max.
- Print density which is in no way inferior to the developers of the comparison samples (fresh maximum D.D. values from Tables 4, 5, 6), is stable and barely fades after the action of plasticizer, comparable to the performance of the known non-phenolic comparative developers (line World Cup Test, Tab. 4 and 5)
- the surface whiteness of the recording papers according to the invention is stable and shows, after the storage experiments, comparable good values to the best comparative papers and considerably better values than those based on the far-flung Pergafast 201® developer (D series, Tables 4 and 5 ).
- the production method according to the invention makes it possible to produce heat-sensitive recording material of high quality in all important application-related matters under economically advantageous conditions.
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Abstract
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DE102014107567.6A DE102014107567B3 (en) | 2014-05-28 | 2014-05-28 | Heat-sensitive recording material |
PCT/EP2015/061835 WO2015181291A1 (en) | 2014-05-28 | 2015-05-28 | Heat-sensitive recording material |
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EP (1) | EP3148816B1 (en) |
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DE102016113203B4 (en) * | 2016-07-18 | 2018-05-30 | Papierfabrik August Koehler Se | HEAT-SENSITIVE RECORDING MATERIAL |
DE102016219567A1 (en) * | 2016-10-07 | 2018-04-12 | Mitsubishi Hitec Paper Europe Gmbh | Heat-sensitive recording material |
DE102016219569A1 (en) * | 2016-10-07 | 2018-04-12 | Mitsubishi Hitec Paper Europe Gmbh | Heat-sensitive recording material |
US10882348B2 (en) | 2016-10-07 | 2021-01-05 | Mitsubishi Hitec Paper Europe Gmbh | Heat-sensitive recording material |
CN110234515B (en) * | 2017-01-30 | 2022-02-11 | 日本曹达株式会社 | Recording material and recording sheet |
DE102017102702B4 (en) * | 2017-02-10 | 2019-09-12 | Papierfabrik August Koehler Se | Heat-sensitive recording material |
CN109487624A (en) * | 2017-09-12 | 2019-03-19 | 金华盛纸业(苏州工业园区)有限公司 | A kind of heat-sensitive paper and its manufacturing method |
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DE102018102180A1 (en) * | 2018-01-31 | 2019-08-01 | Mitsubishi Hitec Paper Europe Gmbh | Heat-sensitive recording material |
DE102018102177A1 (en) | 2018-01-31 | 2019-08-01 | Mitsubishi Hitec Paper Europe Gmbh | Coating composition, heat-sensitive recording layer, thermosensitive recording material, and related uses and methods |
DE102018111224B4 (en) | 2018-05-09 | 2020-12-10 | Papierfabrik August Koehler Se | Thermosensitive recording material |
DE102018133168B4 (en) * | 2018-12-20 | 2021-02-18 | Papierfabrik August Koehler Se | Thermosensitive recording material |
JP2021146642A (en) * | 2020-03-19 | 2021-09-27 | 株式会社リコー | Thermosensitive recording medium, method for producing thermosensitive recording medium, and article |
EP3957488A1 (en) | 2020-08-19 | 2022-02-23 | Mitsubishi HiTec Paper Europe GmbH | Heat-sensitive recording material and heat-sensitive recording layer and coating composition for its production, uses and methods |
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-
2014
- 2014-05-28 DE DE102014107567.6A patent/DE102014107567B3/en not_active Revoked
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2015
- 2015-05-28 CN CN201580027451.7A patent/CN106536209A/en active Pending
- 2015-05-28 US US15/312,754 patent/US10160245B2/en active Active
- 2015-05-28 ES ES15726926T patent/ES2793007T3/en active Active
- 2015-05-28 EP EP15726926.7A patent/EP3148816B1/en active Active
- 2015-05-28 JP JP2016568828A patent/JP2017521282A/en active Pending
- 2015-05-28 WO PCT/EP2015/061835 patent/WO2015181291A1/en active Application Filing
- 2015-05-28 KR KR1020167035039A patent/KR102395673B1/en active IP Right Grant
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CN106536209A (en) | 2017-03-22 |
KR20170010798A (en) | 2017-02-01 |
ES2793007T3 (en) | 2020-11-12 |
WO2015181291A1 (en) | 2015-12-03 |
DE102014107567B3 (en) | 2015-11-05 |
JP2017521282A (en) | 2017-08-03 |
US10160245B2 (en) | 2018-12-25 |
KR102395673B1 (en) | 2022-05-09 |
EP3148816B1 (en) | 2020-02-26 |
US20170190199A1 (en) | 2017-07-06 |
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