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Reversibly thermochromic composition

A thermochromic and composition technology, applied in the direction of color-changing fluorescent materials, heat-sensitive coatings, structure changes of writing utensils, etc., can solve the problems of unsmooth writing feeling, difficult to fade, and fading, etc., and achieve the effect of improving visibility

Inactive Publication Date: 2014-08-20
PILOT PEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the writing feeling becomes rough when writing, and the friction with the writing surface such as paper increases, and the handwriting may become shallow due to the heat generated at this time.
In addition, when it is used for repeated coating in painting (拉り絵), etc., the handwriting that is repeatedly coated will fade due to self-heating caused by rapid writing, and it may be difficult to form a dark and light pattern on the written place.
[0006] In addition, for the handwriting written with the writing ink using the above-mentioned reversible thermochromic composition, fading caused by repeated coating when using a solid writing material is less likely to become a major problem.
However, other problems can arise in cases where the surface to be written on, such as a notebook or notepad, has a front and a back

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 101～106 and comparative example 101～106

[0270] The compositions of the solid writing materials of Examples and Comparative Examples are shown in the following table. In addition, the numerical value of the composition in a table shows a mass part. In addition, the particle size of the microcapsule pigment was measured with a laser diffraction / scattering type particle size distribution measuring device Model LA-300 (trade name, manufactured by Horiba Seisakusho Co., Ltd.), and the average particle size was calculated on a volume basis based on the value. (median particle diameter) obtained value.

[0271]

[0272] The contents of the raw materials in the table are explained according to the comment numbers.

[0273] (1) Reversible thermochromic microcapsule pigment (T 1 : -16°C, T 2 : -8°C, T 3 : 48°C, T 4 : 58°C, ΔH: 65°C, average particle size: 2.5 μm, reversible thermochromic composition: wall film = 2.6:1.0, color changes from blue to colorless), the heat-fading type reversible thermochromic composition ...

Embodiment 201

[0329] (Production of reversible thermochromic composition)

[0330] Thermochromic Microcapsule A 18 parts by mass

[0331] Myristyl alcohol (endothermic phase transition compound) 20 parts by mass

[0332] 32 parts by mass of ion-exchanged water

[0333] Stir the above mixture with a magnetic stirrer until uniform. The obtained mixture was dried at room temperature, whereby a reversible thermochromic composition 201 was obtained.

Embodiment 202～211

[0335] A reversible thermochromic composition was obtained in the same manner as in Example 201, except that the thermochromic microcapsules and endothermic microcapsules shown in Table 4 were used instead of the thermochromic microcapsules A and myristyl alcohol.

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Abstract

[Object] To provide a reversibly thermochromic composition free from accidental discoloration by heat conducting from the opposite side writing surface or by self-heating due to quick writing; and also to provide a solid writing material and a writing ink composition comprising that composition. [Means to solve the problem] A reversibly thermochromic composition comprising a combination of: (a) a reversibly thermochromic component capable of being discolored or decolored by heat and (b) a component for controlling heat conducting to the reversibly thermochromic component; and also a solid writing material and a writing ink composition comprising that composition.

Description

technical field [0001] The present invention relates to compositions having reversible thermochromism. Specifically, it relates to a solid writing material composed of a solid core such as a pencil lead or a color core, which forms handwriting having reversible thermal discoloration; and use as a coloring agent (coloring material) for writing ink compositions such as ballpoint pens, etc. reversible thermochromic composition. Background technique [0002] Conventionally, some proposals have been disclosed regarding solid writing materials and writing ink compositions that form thermochromic handwriting (for example, refer to Patent Documents 1 to 5). [0003] The above-mentioned solid writing material can form handwriting that changes color due to temperature changes by using the reversible thermochromic composition alone or using its microcapsule encapsulated substance as a colorant added to the excipient material wax. In particular, in the case of using a microcapsule pig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K9/02B43K19/00C09D13/00
CPCB43K7/00B43K29/02C09D11/52B43K19/00C09D5/26B43K25/026C09K9/02B43K19/18C09D7/1291C09D13/00B43L19/0025C09D11/17B43K1/08B43K8/02B43K15/00B43K24/02B43K25/02C09D7/70
Inventor 户塚太郎中村尚嗣
Owner PILOT PEN CO LTD
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