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Fluorine type heat sensitive dye for heat sensitive recording materials

A heat-sensitive recording material and heat-sensitive dye technology, applied in the field of new-type fluoran heat-sensitive dyes, can solve the problems of accelerated fading of graphics and text, long storage time, long light time, etc., and achieve fast color development rate, high density, good thermal stability

Inactive Publication Date: 2011-03-23
YIXING XINYU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, long storage time, long exposure time, long heating time, and under the influence of external conditions such as high ambient temperature, ambient humidity, and contact with adhesive tape, will also accelerate the decomposition of color products and accelerate the fading of graphics and texts.

Method used

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  • Fluorine type heat sensitive dye for heat sensitive recording materials
  • Fluorine type heat sensitive dye for heat sensitive recording materials
  • Fluorine type heat sensitive dye for heat sensitive recording materials

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0023] compound

[0024]

[0025] synthetic route

[0026]

[0027] 1. Synthesis of 3'6'-dichlofluororan

[0028]

[0029] Steps:

[0030] In the reactor, 157.5 g of sulfolane and 1.5 g of dimethylformamide were metered into the reactor; 50 g of fluorescein was then added, and stirring was started. Raise the temperature to 70-75°C. 71.6 g of thionyl chloride was added dropwise, and the reaction temperature was maintained at 70-75°C. During the dropwise addition, a negative pressure state was maintained in the reactor so that the thionyl chloride gas would not overflow from the reactor. After the dropwise addition was completed, the reaction was carried out for 30 minutes, during which the temperature was gradually raised to 85-90°C.

[0031] The temperature of the reaction solution was lowered to 40° C., and 200 g of 50% acetone / water solution prepared in advance was metered in for dispersion (the adding process should be carried out slowly, preferably cooling wi...

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Abstract

The invention relates to fluorine type heat sensitive dye for heat sensitive recording materials, which has a compound structural formula shown in the specification of the invention, wherein R is H and alkyls from C1 to C4, R1 is unsubstituted hydrogen atoms or fluorine atoms, R2 is hydrogen atoms or fluorine atoms, and the R1 and the R2 are not the hydrogen atoms or the fluorine atoms at the same time. The heat sensitive recording materials has the characteristics of good light and heat stability, high color development speed, high density, high light and heat stability of images obtained after heat development, and the like.

Description

technical field [0001] The present invention relates to novel fluorane dyes, specifically a class of novel fluoran-based heat-sensitive dyes used in heat-sensitive recording materials. The fluorane dyes of the present invention can be widely used in heat-sensitive recording materials, pressure-sensitive recording materials, temperature display Sexual materials and photochromic recording materials. Background technique [0002] With the development and popularization of office automation, thermal fax machines and thermal printers are more and more used in economic, medical, aviation and other business activities, as well as in public security organs handling traffic accidents and various cases. Widely used, thermal paper has become a widely used technical paper, mostly used for fax documents and direct printing of thermal printers, etc. [0003] Thermal paper is a special coated paper, its appearance is similar to ordinary white paper. The surface of thermal paper is smooth,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B11/24B41M5/327
Inventor 袁顺福黄伟
Owner YIXING XINYU CHEM
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