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Hygrochromic/thermochromic composition and hygrochromic/thermochromic indicator

A composition and indicator technology, applied in the direction of color-changing fluorescent materials, chemical instruments and methods, analysis using chemical indicators, etc.

Inactive Publication Date: 2014-07-23
SAKURA COLOR PRODUCTS CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, there is still room for further improvement in the existing damp heat test indicator

Method used

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  • Hygrochromic/thermochromic composition and hygrochromic/thermochromic indicator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～13 and comparative example 1～2

[0090] (Production of Moisture and Heat Discoloration Composition and Moisture and Heat Discoloration Indicator)

[0091] For the ingredients shown in Table 1, the organic solvent and binder were first stirred with a dissolver. When the binder is difficult to dissolve, it can be dissolved by heating. Then, add the remaining ingredients and stir well. In addition, a ball mill, a bead mill, etc. are used appropriately so that the target particle size of the bismuth compound is 0.2 μm, and the target particle size of the sulfide is 20 μm or less. Thus, 15 kinds of moist heat discoloration compositions (inks) of Examples 1 to 13 and Comparative Examples 1 to 2 were prepared. Use the above-mentioned inks to screen-print on high-grade paper with a 250-mesh screen to form color-changing layers.

[0092] [Table 1]

[0093]

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PUM

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Abstract

The present invention addresses the problem of providing a hygrochromic / thermochromic composition and hygrochromic / thermochromic indicator that are useful for detecting heat and humidity conditions and also make it possible to check for the progress and completion of a sterilization treatment according to the extent of color change. The means by which the invention solves the problem is a hygrochromic / thermochromic composition containing a bismuth compound, a sulfur compound, a binder, and an organic solvent, the hygrochromic / thermochromic composition being characterized in further containing phosphoric acid and / or phosphate ester; and a hygrochromic / thermochromic indicator.

Description

technical field [0001] The present invention relates to a moist heat discoloration composition and a moist heat discoloration indicator useful for inspection of sterilization conditions in high pressure steam sterilization used in the medical field and food field, and confirmation of completion of sterilization treatment. Background technique [0002] High-pressure steam sterilization is used in various fields such as the medical field and the food processing field. In the medical field, it is used, for example, for sterilization and sterilization of medical equipment and medical instruments. In addition, in the field of food processing, it is used for sterilization in the production of retort food, etc., for example. [0003] The methods for checking the sterilization conditions and confirming the completion of the sterilization treatment in autoclaving are roughly divided into biological methods and chemical methods, and the latter method is preferred in terms of simplici...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K9/00C08K3/22C08K3/26C08K5/098C08K5/36C08K5/521C08L101/00C09D11/50G01N31/22A61L2/26C08K3/00C09D11/00C09K3/00
CPCA61L2/28C09D11/50C09K9/02G01N31/226
Inventor 副岛纱纪子
Owner SAKURA COLOR PRODUCTS CORPORATION
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