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Method for preparing transparent green glow yellow pigment C.I.P.Y180

A yellow pigment and green light technology, applied in the direction of organic dyes, etc., can solve the problems of high energy consumption, long process flow, and limitations, and achieve the effects of reducing the use of organic solvents, simple reaction conditions, and good economic benefits

Inactive Publication Date: 2013-10-02
GAOYOU HUABAO PIGMENT
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The commercially available green light yellow pigment yellow 180 is mainly used in the plastic and coating industries, because its transparency does not meet the requirements and it cannot be used in the ink industry. Its main raw material is BAPE (2,2'-diaminoethylene glycol Diphenyl ether, 2,2'-diaminoethylene glycol diphenyl ether), the coupling component is AABI (5-acetoacetamido benzimidazolone), and its preparation method is similar to that of general benzimidazolone pigments, for example In the German patent DE2347532, the diazotization reaction is first performed to dissolve the coupling components, and then the crude product after the cis-coupling synthesis is used for pigmentation treatment, such as heat treatment in the organic solvent isobutanol and DMF. Refer to European patent EP10212 and US patent US4370269. The disadvantages are that the color of the prepared pigments is not bright enough, and the tinting strength is relatively average. In addition, the process is long, the energy consumption is high, and the solvent recovery is difficult. The most important thing is that the pigments prepared by these methods are all types of high hiding power. , can not produce high transparency type, the application in ink is limited, so research and development of a new method for preparing transparent pigment yellow 180 will be of great significance

Method used

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  • Method for preparing transparent green glow yellow pigment C.I.P.Y180

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Experimental program
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Effect test

Embodiment 1

[0020] A preparation method of transparent green light yellow pigment C.I.P.Y180 comprises the following steps:

[0021] 1) Take 23.5g of 2,2'-diaminoethylene glycol diphenyl ether, 1.0g of 2,2'-diaminoethylene glycol diphenyl ether, 50g of HCl with a concentration of 36% and 500mL of water, dissolve and cool to 0~5 ℃, adding NaNO to it 2 To excess, after stirring for 3 hours, react with urea to remove excess nitrous acid, then decolorize and filter to obtain diazonium salt solution, add ice water to adjust the volume to 1000mL for later use;

[0022] 2) Take 57.2 g of 5-acetoacetamidobenzimidazolone, add it to 500 mL of water, add 37.3 g of potassium hydroxide to dissolve and filter it, collect the filtrate and add pure water to adjust the volume to 1050 mL, and obtain the coupling component for later use;

[0023] 3) Take 107g of sodium acetate, add it to 2000mL of water, add 5g of auxiliary hyperdispersant, 30g of acetic acid, and configure it into a buffer solution. After...

Embodiment 2

[0026] A preparation method of transparent green light yellow pigment C.I.P.Y180 comprises the following steps:

[0027] 1) Take 21.5g of 2,2'-diaminoethylene glycol diphenyl ether, 3.0g of 2,2'-diaminoethylene glycol diphenyl ether, 60g of 36% HCl and 500mL of water, dissolve and cool to 0~5 After ℃, add NaNO to it 2 To excess, stir for 3 hours, react with urea to remove excess nitrous acid, then decolorize and filter to obtain diazonium salt solution, add ice water to adjust the volume to 1000mL for later use;

[0028] 2) Take 57.2 g of 5-acetoacetamidobenzimidazolone, add it to 500 mL of water, add 37.3 g of potassium hydroxide to dissolve and filter it, collect the filtrate and add pure water to adjust the volume to 1050 mL, and obtain the coupling component for later use;

[0029] 3) Take 107g of sodium acetate, add it to 2000mL of water, add 5g of auxiliary hyperdispersant, 30g of acetic acid, and configure it into a buffer solution. After controlling the temperature at...

Embodiment 3

[0032] A preparation method of transparent green light yellow pigment C.I.P.Y180 comprises the following steps:

[0033] 1) Take 21.5g of 2,2'-diaminoethylene glycol diphenyl ether, 3.0g of 2,2'-diaminoethylene glycol diphenyl ether, 60g of 36% HCl and 500mL of water, dissolve and cool to 0~5 ℃, adding NaNO to it 2 To excess, stir for 3 hours, react with urea to remove excess nitrous acid, then decolorize and filter to obtain diazonium salt solution, add ice water to adjust the volume to 1000mL for later use;

[0034] 2) Take 57.2 g of 5-acetoacetamidobenzimidazolone, add it to 500 mL of water, add 37.3 g of potassium hydroxide to dissolve and filter it, collect the filtrate and add pure water to adjust the volume to 1050 mL, and obtain the coupling component for later use;

[0035] 3) Take 107g of sodium acetate, add it to 2000mL of water, add 5g of auxiliary hyperdispersant, 30g of acetic acid, and configure it into a buffer solution. After controlling the temperature at 15...

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Abstract

The invention discloses a method for preparing a transparent green glow yellow pigment C.I.P.Y180, and belongs to the technical field of preparation of pigments. The method comprises the following steps: 1) using 2,2'-diamino glycol diphenyl ether to prepare a diazonium salt solution; 2) using 5-acetylacetamidobenzimidazolone and potassium hydroxide to prepare a coupling component solution; 3) using acetic acid and sodium acetate to prepare a buffer solution, dropwise adding the diazonium salt solution and the residual coupling component solution, after addition continuing stirring for a complete coupling reaction, and filtering to obtain a pigment crude product; and 4) adding the pigment crude product to a pigmentation reaction kettle, adding an assistant and water, and heating; and finally filtering, drying and crushing to obtain a final pigment. The method provided by the invention not only reduces the usage of organic solvents, has simple reaction conditions, but also significantly improves transparency of the pigment; besides, the method greatly reduces energy consumption, cost and the usage of flammable and explosive goods, improves safety, and has good economic benefits.

Description

technical field [0001] The invention belongs to the technical field of pigment preparation, in particular to a preparation method of transparent green light yellow pigment C.I.P.Y180. Background technique [0002] C.I.P.Y180 belongs to benzimidazolone pigments, its CAS.NO.: 77804-81-0, its molecular formula is as follows: [0003] [0004] The commercially available green light yellow pigment yellow 180 is mainly used in the plastic and coating industries, because its transparency does not meet the requirements and it cannot be used in the ink industry. Its main raw material is BAPE (2,2'-diaminoethylene glycol Diphenyl ether, 2,2'-diaminoethylene glycol diphenyl ether), the coupling component is AABI (5-acetoacetamido benzimidazolone), and its preparation method is similar to that of general benzimidazolone pigments, for example In the German patent DE2347532, the diazotization reaction is first performed to dissolve the coupling components, and then the crude product a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/20
Inventor 姚涌朱子林
Owner GAOYOU HUABAO PIGMENT
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