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
  • B41M5/124—Duplicating or marking methods; Sheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components
  • B41M5/132—Chemical colour-forming components; Additives or binders therefor
  • B41M5/136—Organic colour formers, e.g. leuco dyes
  • B41M5/145—Organic colour formers, e.g. leuco dyes with a lactone or lactam ring
• • 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
  • B41M5/124—Duplicating or marking methods; Sheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components
  • B41M5/132—Chemical colour-forming components; Additives or binders therefor
  • B41M5/136—Organic colour formers, e.g. leuco dyes
  • B41M5/145—Organic colour formers, e.g. leuco dyes with a lactone or lactam ring
  • B41M5/1455—Organic colour formers, e.g. leuco dyes with a lactone or lactam ring characterised by fluoran compounds

Definitions

• the known color formers such as crystal violet lactone and the fluoranlactones are very well suited for pressure- and heat-sensitive recording systems, but have the disadvantage of insufficient light fastness in a number of applications.
• the object of the present application was to provide improved color formers in light fastness.
• the color former mixtures according to the invention are therefore very well suited for the production of pressure-sensitive recording systems
• Component (a) corresponds to the formula
• crystal violet lactone and / or fluoranlactones of the formula (II) come into consideration, the latter of which are preferred for (b).
• the mixture generally contains components (a) and (b) in a ratio of 1: 4 to 4: 1, preferably 1: 3 to 3: 1, in particular 0.9: 1, 1 to 1.1: 0.9 Parts by weight.
• a ratio of (a) :( b) of about 1: 1 parts by weight is very particularly preferred.
• the color former mixture according to the invention is preferably enclosed in microcapsules in the form of a solution and used in this form for the production of pressure-sensitive transmission systems.
• the known microcapsules containing for the production of color former are used as solvents, e.g. Chlorinated paraffins, halogenated or partially hydrogenated diphenyl, partially hydrogenated terphenyl, alkylbenzenes, alkylnaphthalenes, alkylated dibenzylbenzene, paraffin oil, mineral oil or solvents such as toluene or xylene.
• solvents e.g. Chlorinated paraffins, halogenated or partially hydrogenated diphenyl, partially hydrogenated terphenyl, alkylbenzenes, alkylnaphthalenes, alkylated dibenzylbenzene, paraffin oil, mineral oil or solvents such as toluene or xylene.
• solvents e.g. Chlorinated paraffin
• suitable layers are those based on active clays.
• active clays are e.g. commercially available under the name COPlSlL®.
• the color strength was determined with an ELREPHO from Leitz, Wetzlar. From the determined values - (standard color values), the K / S values were determined according to the Kubelka-Munk equation, which as a quotient of spectral absorption coefficient and spectral scattering coefficient proportional to the color intensity ( Color strength) and thus allow statements about the color strength of colorations - even if they do not have the same hues -.
• Example 1 c The solutions obtained were knife-coated on CF paper as in Example 1 b), the coated sheets were halved and the color strength development was determined in accordance with Example 1 c).

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Color Printing (AREA)
• Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6263847

Family Applications (1)

Country Status (6)

Cited By (4)

Families Citing this family (6)

Citations (3)

Family Cites Families (2)

• 1985
  • 1985-03-01 DE DE19853507173 patent/DE3507173A1/de not_active Withdrawn
• 1986
  • 1986-02-20 FI FI860749A patent/FI860749A7/fi not_active Application Discontinuation
  • 1986-02-27 US US06/833,280 patent/US4717423A/en not_active Expired - Fee Related
  • 1986-02-27 JP JP61040534A patent/JPS61204275A/ja active Pending
  • 1986-02-28 BR BR8600875A patent/BR8600875A/pt unknown
  • 1986-02-28 EP EP86102602A patent/EP0193200A1/fr not_active Withdrawn

Patent Citations (3)

Non-Patent Citations (3)

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