EP0138159A2 - Matériel d'enregistrement thermosensible, préparation et emploi de polymères modifiés par l'acide comme accepteurs dans ce matériel - Google Patents

Matériel d'enregistrement thermosensible, préparation et emploi de polymères modifiés par l'acide comme accepteurs dans ce matériel Download PDF

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Publication number
EP0138159A2
EP0138159A2 EP84111852A EP84111852A EP0138159A2 EP 0138159 A2 EP0138159 A2 EP 0138159A2 EP 84111852 A EP84111852 A EP 84111852A EP 84111852 A EP84111852 A EP 84111852A EP 0138159 A2 EP0138159 A2 EP 0138159A2
Authority
EP
European Patent Office
Prior art keywords
recording material
acid
thermoreactive recording
acrylonitrile
material according
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
Application number
EP84111852A
Other languages
German (de)
English (en)
Other versions
EP0138159A3 (en
EP0138159B1 (fr
Inventor
Hubertus Dr. Psaar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayer AG
Original Assignee
Bayer AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bayer AG filed Critical Bayer AG
Publication of EP0138159A2 publication Critical patent/EP0138159A2/fr
Publication of EP0138159A3 publication Critical patent/EP0138159A3/de
Application granted granted Critical
Publication of EP0138159B1 publication Critical patent/EP0138159B1/fr
Expired legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/30Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
    • B41M5/333Colour developing components therefor, e.g. acidic compounds
    • B41M5/3331Macromolecular compounds

Definitions

  • thermoreactive recording material which contains a dye precursor and an acid-modified polymer of acrylonitrile as an acceptor.
  • Heat-sensitive recording materials are already known in which a colorless dye precursor with an acceptor is applied in one layer to a carrier material, the two components being coated separately with other materials in order to prevent a premature color reaction. During the heat treatment, melting the envelopes and, if applicable, the acceptor material brings both components into contact and triggers a color reaction.
  • Dye precursors from various classes of dyes are known as color formers.
  • materials that trigger the color reaction organic compounds containing phenolic groups, for example bisphenol A, have hitherto become known, but because of their high rate of migration and volatility they have to be mixed with absorbents such as kaolin. The volatility of the phenols is a major disadvantage of these materials, as they often cause unpleasant smells. Another disadvantage of these acceptors is their sensitivity to pressure.
  • acid-modified polyacrylonitrile is an acceptor material which does not have the disadvantages mentioned above.
  • polymers of acrylonitrile and copolymers view of acrylonitrile with other vinyl compounds such as vinylidene cyanide, vinyl fluoride, vinyl acetate, vinyl propionate, vinylpyridine, vinylimidazole, vinylpyrrolidone, vinyl ethanol, acrylic or methacrylic acid ester as well as their hydroxyalkyl esters, acrylic or methacrylic acid amides or their dialkylamides into account, wherein these copolymers have at least 50% by weight, preferably at least 85% by weight, of acrylonitrile units.
  • the polymers preferably contain a sulfo or sulfato group as the acid group.
  • the glass transition temperature of the polymers can be varied within a wide range and adapted to the desired effect.
  • Acrylates such as methyl acrylate, ethyl ester, n-propyl ester, -n-, -iso-and-tert-butyl ester, -hexyl ester, -2-ethylhexyl ester and lauryl ester are preferably suitable as comonomers for this purpose.
  • the acid-modified acrylonitrile polymers are prepared by known methods, the acid group being introduced into the end of the polymerization chain either through an acidic catalyst or through comonomers containing acid groups, for example vinylsulfonic acid, styrene sulfonic acid, allylsulfonic acid, methallylsulfonic acid, vinyloxyarene sulfonic acid, allyloxyarene sulfoxy acid, methaloxy sulfonic acid, methaloxy sulfonic acid, methaloxy sulfonic acid, methaloxy sulfonic acid, methaloxy sulfonic acid, .
  • These preparations are described, for example, in DT-C-654 989, US-A-2 601 256 and US-A-2 913 438 and in F.
  • acrylic polymers are suitable which contain acidic groups capable of developing the dye precursors.
  • the proportion of the acid groups in the acrylic polymer is preferably 0.5 to 2% by weight.
  • the dye precursors to be used are the dye formers which can usually be used for printing and thermocopying purposes, with the exception of those which can only be converted into dyes by air oxidation. Suitable color formers are described, for example, in the following publications:
  • carbinol bases or their derivatives especially carbinol bases or carbinol base ethers of small dye molecules which, due to their low molecular weight, easily penetrate into the polymers and can be bound there in salt form.
  • Examples of such compounds are carbinol bases or carbinol base derivatives of diaryl and triarylmethane dyes, which e.g. in US-A-4 211 436 and fluoranes.
  • the acid-modified acrylonitrile polymers are powdered with binders, e.g. Ground polyvinyl alcohol, hydroxyethyl cellulose, gum arabic, polyvinyl pyrrolidone, casein or similar substances.
  • binders e.g. Ground polyvinyl alcohol, hydroxyethyl cellulose, gum arabic, polyvinyl pyrrolidone, casein or similar substances.
  • fatty acids or fatty acid amides, long-chain alkyl sulfates or esters of long-chain alcohols to the polymers, for example phosphoric acid esters of long-chain alcohols such as mono- and di-phosphoric acid esters of C 8 -C 22 -alcohols, in amounts of 0.1 to 10% , based on the polymer.
  • the polymer can also be treated beforehand with the additives, for example ground.
  • the colorants are ground separately with the binders.
  • the dispersions of the acceptor are mixed with the dispersions of the color generator and applied and dried by means of a doctor blade on the carrier material, preferably cellulose paper, so that an application weight of 5 to 8 g per m 2 results.
  • the acceptor paper from a mixture of an acrylonitrile polymer with the additives described above with cellulose, sizing agent and aluminum sulfate in a sheet former and to coat it with the color former.
  • a finely powdered polyacrylonitrile polymer prepared from 94% acrylonitrile, 0.5% methallylsulfonic acid and 5.5% methyl acrylate, are ground in a ball mill with 225 g of an 8% aqueous polyvinyl alcohol solution and with the addition of 1.3 g distearyl phosphoric acid ester.
  • a second dispersion is prepared from 1 g of octyl-4,4'-bis (dimethylamino) benzhydryl sulfone and 55 g of an 8% aqueous polyvinyl alcohol solution.
  • the dispersion of the color former is mixed with that of the acceptor in a ratio of 1/10 and the mixture is applied to cellulose paper by means of a doctor blade and dried so that an application weight of 6 to 7 g / m 2 is obtained.
  • the paper can be written on with writing materials such as a ballpoint pen. It is insensitive to strong pressure. When you touch the paper with a heated pen, you get clear, sharp, shadow-free, blue writing. The lightfastness of the coloring is excellent.
  • a polyacrylic polymer prepared from 86.5% acrylonitrile, 0.5% methallylsulfonic acid, 13% methyl acrylate, are ground with 1.3 g monostearyl phosphoric acid ester and 425 g water, suction filtered and dried.
  • the dry polymer is ground with 112 g of a 4% aqueous polyvinyl alcohol solution.
  • a second dispersion is made from 2 g of a color former of the formula and 55 g of an 8% aqueous polyvinyl alcohol solution.
  • the two dispersions according to Example 1 are mixed in a ratio of 1/10 and applied to cellulose paper. With a heated pen you get a black lightfast font on the dried paper sheet.
  • aqueous 8% polyvinyl alcohol solution mixed in a ratio of 1/10 and applied to cellulose paper according to Example 1 wear.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)
  • Paper (AREA)
  • Color Printing (AREA)
  • Paints Or Removers (AREA)
EP84111852A 1983-10-13 1984-10-04 Matériel d'enregistrement thermosensible, préparation et emploi de polymères modifiés par l'acide comme accepteurs dans ce matériel Expired EP0138159B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3337296 1983-10-13
DE19833337296 DE3337296A1 (de) 1983-10-13 1983-10-13 Thermoreaktives aufzeichnungsmaterial, seine herstellung und die verwendung von sauermodifizierten polymerisaten als akzeptoren in diesem aufzeichnungsmaterial

Publications (3)

Publication Number Publication Date
EP0138159A2 true EP0138159A2 (fr) 1985-04-24
EP0138159A3 EP0138159A3 (en) 1986-05-21
EP0138159B1 EP0138159B1 (fr) 1988-08-31

Family

ID=6211767

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111852A Expired EP0138159B1 (fr) 1983-10-13 1984-10-04 Matériel d'enregistrement thermosensible, préparation et emploi de polymères modifiés par l'acide comme accepteurs dans ce matériel

Country Status (7)

Country Link
US (1) US4600930A (fr)
EP (1) EP0138159B1 (fr)
JP (1) JPS60132788A (fr)
CA (1) CA1230739A (fr)
DE (2) DE3337296A1 (fr)
FI (1) FI79976C (fr)
HK (1) HK51289A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0407828A3 (en) * 1989-07-11 1991-05-08 Bayer Ag Thermosensitive recording material
AT399126B (de) * 1987-03-31 1995-03-27 Ruetgerswerke Ag Farbentwicklermassen für farbreaktionssysteme

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3715724A1 (de) * 1987-05-12 1988-11-24 Bayer Ag Thermoreaktives aufzeichnungsmaterial
US4877767A (en) * 1987-08-14 1989-10-31 The Mead Corporation Vinyl developer resins
DE3940480A1 (de) * 1989-12-07 1991-06-13 Bayer Ag Chromogene enaminverbindungen, ihre herstellung und verwendung als farbbildner
JP2596271Y2 (ja) * 1991-10-02 1999-06-07 株式会社アマダ レーザ加工機

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3413138A (en) * 1965-10-13 1968-11-26 Interchem Corp Thermosensitive copy sheet
BE790932A (fr) * 1971-11-01 1973-03-01 Fuji Photo Film Co Ltd Feuille d'enregistrement
JPS5833838B2 (ja) * 1978-03-28 1983-07-22 神崎製紙株式会社 感熱記録体
DE2820486A1 (de) * 1978-05-10 1979-11-15 Bayer Ag Verfahren zur herstellung von sulfinaten des 4,4'diaminobenzhydrols und seiner substitutionsprodukte
JPS5553592A (en) * 1978-10-16 1980-04-19 Fuji Photo Film Co Ltd Recording material
JPS57167380A (en) * 1981-04-08 1982-10-15 Pilot Ink Co Ltd Thermochromic material
JPS59106995A (ja) * 1982-12-11 1984-06-20 Kanzaki Paper Mfg Co Ltd 感熱記録体

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT399126B (de) * 1987-03-31 1995-03-27 Ruetgerswerke Ag Farbentwicklermassen für farbreaktionssysteme
EP0407828A3 (en) * 1989-07-11 1991-05-08 Bayer Ag Thermosensitive recording material
US5134113A (en) * 1989-07-11 1992-07-28 Bayer Aktiengesellschaft Thermoreactive recording material

Also Published As

Publication number Publication date
DE3473747D1 (en) 1988-10-06
FI79976B (fi) 1989-12-29
FI79976C (fi) 1990-04-10
FI843998L (fi) 1985-04-14
EP0138159A3 (en) 1986-05-21
CA1230739A (fr) 1987-12-29
JPS60132788A (ja) 1985-07-15
US4600930A (en) 1986-07-15
DE3337296A1 (de) 1985-04-25
HK51289A (en) 1989-07-07
EP0138159B1 (fr) 1988-08-31
FI843998A0 (fi) 1984-10-11

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