Process for production of pigment/resin composition, coloring agent and coloring method

The technology of a resin composition and a manufacturing method is applied in the directions of pigment slurry, developer, organic dye, etc., which can solve the problems of long processing time and poor production efficiency of colorants, and achieves improved production efficiency, shortened heating and kneading time, Excellent dispersion effect

Inactive Publication Date: 2011-09-28
DAINICHISEIKA COLOR & CHEM MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in this method, manpower is required when moving from the feeding (addition) of raw materials or the mixing and kneadi

Method used

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  • Process for production of pigment/resin composition, coloring agent and coloring method
  • Process for production of pigment/resin composition, coloring agent and coloring method
  • Process for production of pigment/resin composition, coloring agent and coloring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0087] The following examples are given to illustrate the present invention more specifically, but the present invention is not limited to these examples. It should be noted that "part" or "%" in the text is a quality standard.

[0088] [Example (1) of colorant for commonly used resins]

Embodiment A-1

[0089] Embodiment A-1 (manufacture of high-concentration colorant and coloring of resin)

[0090] (1) Pigment hydrate (pigment component) obtained by dehydrating copper phthalocyanine blue pigment (C.I. : 88%, moisture: 12%) 34.1 parts and polyethylene resin (ethylene-alpha olefin polymer, melting point is about 60 ° C,) 65.9 parts mixed for 2 minutes, put into the container with 3 exhaust ports with a quantitative feeder In a twin-screw extruder (L / D=52). The temperature of the heater of the twin-screw extruder was gradually set to 60 to 140° C. and set in an inclined manner. After putting in the mixture, let it stand for a period of time, the moisture will be discharged from the downward air outlet close to the input port, and the water vapor will be ejected from the next air outlet. Water vapor is hardly ejected from the exhaust port of the die near the front end of the extruder. The high-concentration colorant extruded from the die is cooled with a cooling water tank an...

Embodiment A-2

[0092] Embodiment A-2 (manufacture of high-concentration colorant and coloring of resin)

[0093] (1) 42.9 parts of a pigment hydrate (pigment component: 70%, moisture: 30%) obtained by removing moisture from an aqueous filter cake of copper phthalocyanine blue pigment (PB15:3) under reduced pressure using a Henschel mixer and 57.1 parts of polypropylene-based resin (polypropylene wax, melting point: about 87° C.) were mixed for 2 minutes, and injected into a twin-screw extruder (L / D=52) having three vents with a quantitative feeder.

[0094] The temperature of the heater of the twin-screw extruder was gradually set to 60 to 140° C. and set in an inclined manner. After putting in the mixed material, leave it for a period of time, the moisture will be discharged from the downward air outlet close to the input port, and the water vapor will be ejected from the next air outlet. Water vapor is hardly ejected from the exhaust port of the die near the front end of the extruder. Th...

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Abstract

Disclosed are a process for the production of a pigment/resin composition, a coloring agent, and a coloring method. The process is characterized by introducing both a pigment and a heat-meltable resin continuously into a kneading extruder provided with at least one vent hole in the presence of moisture in an amount of 3 to 70mass% of the sum of the pigment and the resin, kneading the pigment and the resin together at a temperature not lower than the melting point of the resin while discharging steam produced from both separated moisture and remaining moisture through the vent hole, and thus dispersing the pigment in the molten resin. According to the process for the production of a pigment/resin composition, the coloring agent and the coloring method, a coloring agent useful in coloring plastics or in coloring image recording agents can be produced with flexible accommodation to an increase in demand, while enhanced production efficiency, shortened processing time, man-power saving, and streamlining can be attained in charging and in steps subsequent to kneading.

Description

technical field [0001] The present invention relates to a method for producing an efficient pigment / resin composition (a colorant containing a colorant for an image recording agent and other resins, the same applies hereinafter). Rationalized production methods of pigment / resin compositions with excellent properties, colorants for common resins, colorants for image recording agents, coloring methods using these colorants, image recording methods, colored articles, and recorded images. Background technique [0002] Conventionally, pigment / resin compositions have widely used a colorant obtained by using a dry powdered pigment as a pigment and coloring the pigment on the surface of a resin pellet, a powdered or granular colorant mixed with a pigment and a dispersant, a colorant obtained by mixing a pigment and a dispersant, Paste colorants obtained by dispersing pigments in plasticizers, or masterbatches in which pigments, resins, and dispersants are kneaded at high concentrati...

Claims

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Application Information

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IPC IPC(8): G03G9/09C09D17/00G03G9/087C09B67/20C09D11/00
CPCC09D17/002C09B67/0013C09B67/0095G03G9/081C08J3/20C09B67/006C09D17/00G03G9/09
Inventor 金纳雅之神原行雄甲斐智山本公小川伸一早田茂田卷岳山元一郎芝田正之中村道卫
Owner DAINICHISEIKA COLOR & CHEM MFG CO LTD
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