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Xanthene-based pigment, dye composition, coloring agent and coloring method for anodic aluminum oxide, and method for producing pigment

A dye composition, anodized aluminum technology, applied to diphenoxanthamine/xanthone/thioxanthone/selenoxanthone/telloxanthone dyes, organic dyes, triarylmethane dyes and other directions, which can solve problems such as hue and insufficient light fastness

Pending Publication Date: 2021-03-30
HODOGAYA KAGAKU IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, violet xanthene-based pigments (Patent Documents 4, 5, etc.) are known as colorants for anodized aluminum, but they are insufficient in hue and light resistance, and a single pigment that does not require color mixing and has good light resistance is required.

Method used

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  • Xanthene-based pigment, dye composition, coloring agent and coloring method for anodic aluminum oxide, and method for producing pigment
  • Xanthene-based pigment, dye composition, coloring agent and coloring method for anodic aluminum oxide, and method for producing pigment
  • Xanthene-based pigment, dye composition, coloring agent and coloring method for anodic aluminum oxide, and method for producing pigment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0187]

[0188] Anodizing treatment was performed on an aluminum substrate in the following procedure to produce colored aluminum. In addition, in the process of anodizing and dyeing, processing time and dye compound density|concentration are set.

[0189] (Degreasing) In a container, prepare a mixture of 150 mL of a degreasing agent (Okuno Pharmaceutical Co., Ltd., Top ADD-100), 70 mL of 98% sulfuric acid, and 1,000 mL of water as a degreasing liquid, and cut the dyed The aluminum substrate was dipped, degreased at 60°C for 3 minutes, and washed with water after the treatment.

[0190] (Anodic oxidation) Use 98% sulfuric acid to prepare 180g / L electrolyte, connect the aluminum substrate to the electrode of the electrolysis device, immerse in the electrolyte tank, at a temperature of 19-21°C and a current density of 1.0A / dm 2 Anodization was performed under the conditions of the following energization time to obtain an anodic oxidation film with the following thickness. Wa...

Embodiment 2～ Embodiment 4

[0199] Except having used the dye (1-2), (1-3), or (1-4) instead of the dye (1-1), it produced the colored aluminum plate by the method similar to Example 1, and evaluated the hue. The results are summarized in Table 1.

[0200] [Reference example 1 to reference example 4]

[0201] Instead of the dye (1-1), the following dyes not belonging to the present invention are represented by the following formula (the maximum absorption wavelength (λmax) (nm) of the aqueous solution is also shown.):

[0202] (D-1) C.I.Acid Red 289 (λmax: 526nm),

[0203] (D-2) C.I.Acid Violet 102 (λmax: 533nm),

[0204] (D-3) C.I.Acid Violet 9 (λmax: 529nm),

[0205] (D-4) C.I.Acid Red 92 (λmax: 538nm)

[0206] , using the same production conditions as in Example 1 to produce colored aluminum, and the evaluation results of the hue are summarized in Table 1.

[0207] 【Chemical 32】

[0208]

[0209] 【Chemical 33】

[0210]

[0211] 【Chemical 34】

[0212]

[0213] 【Chemical 35】

[0214] ...

Embodiment 5

[0218]

[0219] About the colored aluminum plate colored using the pigment (1-3), the light resistance test was performed by the following method. For the use of xenon gas fading meter / ATLAS Ci 3000+Xenon Weather Ometer (manufactured by アトラス company), the irradiance: 300~400nm, 60W / m 2 , Temperature in the test tank: 38°C, humidity: 50%, blackboard (BP) temperature: 63°C, irradiated the colored aluminum plate for 50 hours, 100 hours and 200 hours, and carried out the hue and light irradiation with the color difference meter Color difference ΔE before and after * In addition, light fastness was judged by visual judgment of color fastness (JIS L 0804 "Gray scale for color change and fading") based on the number of gradation levels. In terms of levels, level 5 is the highest and level 1 is the lowest. The higher the level, the darker the color (color difference ΔE * Small), maintaining the hue before irradiation. In the evaluation method of the present invention, the determi...

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PUM

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Abstract

The invention relates to a xanthene-based pigment, a dye composition, a coloring agent and coloring method for anodic aluminum oxide and a method for producing the pigment. The invention provides a novel xanthene-based pigment, a composition, an anodic aluminum oxide agent, and a method for producing xanthene, whereby an anodized coating film that does not contain a heavy metal such as chromium and exhibits a purple color can be formed on the surface of aluminum, an aluminum oxide, or an aluminum alloy. A xanthene pigment is represented by general formula (1). [In formula (1), each of R1 and R2 independently represents an optionally substituted naphthyl group having 6 to 30 carbon atoms or an optionally substituted phenyl group having 6 to 30 carbon atoms. However, at least one of R1 and R2 represents a naphthyl group having 6-30 carbon atoms, which may have a substituent.

Description

technical field [0001] The present invention relates to a xanthene-based pigment and a dye composition suitable for a colorant for anodized aluminum. In addition, it relates to a coloring method of anodized aluminum using the pigment and the dye composition, and a method for producing the pigment. Background technique [0002] Conventionally, as a method of coloring the surface of aluminum (including its oxides or alloys), a method has been used in which aluminum is used as an anode in an electrolytic solution containing water and a suitable acid to conduct electricity (anodizing) to form porous surfaces on the surface. After the aluminum oxide film (alumite film) is used, organic pigments (or organic dyes) are used as colorants to color the surface (Patent Documents 1 to 5). [0003] In order to meet the needs of various colored aluminum products in recent years, a coloring method that can cope with dyes of various colors has been developed (Patent Document 4). For exampl...

Claims

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Application Information

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IPC IPC(8): C09B11/28C07D311/82C25D11/22
CPCC09B11/28C07D311/82C25D11/22C09B11/24C25D11/243C09B67/0071
Inventor 吉田哲也村上智耶永山力丸关根和彦
Owner HODOGAYA KAGAKU IND
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