Granulated colorant and related art

Inactive Publication Date: 2007-06-28
ORIENT CHEM INDS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0029]Because the colored composition of the present invention has low anisotropy and is excellent in heat resistance, sliding quality and dimensional accuracy, is excellent in mechanical properties, particularly in impact strength, and confers excellent surface appearance to molded products, it is useful as an engineering plastic in, for example, electric/electronic components such as connectors, sockets, relay case switches, variable condenser cases, optical pickups, plugs, printed substrates, tuners, speakers, microphones, headphones, FDD chassis, motor brush holders, parabola antennas, computer-related components, VTR components, television components, irons, hair dryers, electric rice cooker components, microwave oven components, acoustic components, audio/laser discs, compact discs, lighting components, refrigerator components, air conditioner components, and word processor compo

Problems solved by technology

Generally, in coloring a fiber-reinforced thermoplastic resin, a problem arises that the colorant (particularly black pigment) is difficult to sufficiently uniformly disperse in the resin even with a long time of kneading, because a fibrous reinforcing material is present in the resin.
In particular, the spoilage of the gloss, appearance and the like of the colored molded product by the fibrous reinforcing material floating on the surface of the molded product during molding has been problematic.
Additionally, because nigrosine dyes are powders having small values of bulk density and average particle diameter, nigrosine dye dusting can occur during dye charge, blending with the resin, and the like, po

Method used

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  • Granulated colorant and related art
  • Granulated colorant and related art

Examples

Experimental program
Comparison scheme
Effect test

example 1

(1) Production of Granulated Colorant (Nigrosine Dye: Water=100:35)

[0084]After 2000 g of Nigrosine Base SAP (name of a product manufactured by Orient Chemical Industries, Ltd.; a nigrosine dye as C.I. Solvent Black 7, having a specific surface area of 3.50 m2 / g, an average particle diameter of 7 μm, an Fe content of 6000 ppm, an aniline content of 1.50% by weight, a nitrobenzene content of 0.1% by weight, and a product pH of 5.1) and 700 g of water were blended in a kneader for 3 minutes, the blend was removed.

[0085]This blend was subjected to extrusion granulation treatment using an extrusion granulating machine (Disc Pelletter F-5 model, a commercial product manufactured by DALTON Corporation) with a selected disc die opening diameter of 3 mm, while adjusting the roller revolution speed (120 rpm) and keeping a constant roller pressure (100 kg / cm2), to yield a wet colorant comprising a cylindrical pellet (granulation product) and partially ungranulated material. This pellet was rem...

example 2

(1) Production of Granulated Colorant (Nigrosine Dye:Water=100:35)

[0088]After 2000 g of Nigrosine Base SAP and 700 g of water were blended in a kneader for 3 minutes, the blend was removed. This blend was subjected to extrusion granulation treatment using an extrusion granulating machine (Disc Pelletter F-5 model) with a selected disc die opening diameter of 2 mm, while adjusting the roller revolution speed and keeping a constant roller pressure, to yield a wet colorant comprising a cylindrical pellet (granulation product) and partially ungranulated material. This pellet was removed and its hardness was determined to be 1.96 N using a hardness meter (KIYA type hardness meter: WPF1600). The bulk density of the granulation product was 0.59 g / ml.

[0089]The wet colorant obtained was dried at 70° C. for 5 hours to yield a colorant containing 80% by weight of a cylindrical pellet. The colorant obtained was sieved to yield a cylindrical pellet of ø1.92 mm×9.37 mm (granulated colorant A-2). ...

example 3

(1) Production of Granulated Colorant (Nigrosine Dye:Water=100:47.8)

[0091]After 2000 g of Nigrosine Base SAP and 950 g of water were blended in a kneader for 3 minutes, the blend was removed. This blend was subjected to extrusion granulation treatment using an extrusion granulating machine (Disc Pelletter F-5 model) with a selected disc die opening diameter of 5 mm, while adjusting the roller revolution speed and keeping a constant roller pressure, to yield a wet colorant comprising a cylindrical pellet (granulation product) and partially ungranulated material. This pellet was removed and its hardness was determined to be 6.86 N using a hardness meter (KIYA type hardness meter: WPF1600). The bulk density of the granulation product was 0.60 g / ml.

[0092]The wet colorant obtained was dried at 70° C. for 5 hours to yield a colorant comprising 78% by weight of a cylindrical pellet. The colorant obtained was sieved to yield a cylindrical pellet of ø4.93 mm×15.48 mm (granulated colorant A-3...

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Abstract

A granulated colorant as a granulation product of a powdery nigrosine dye, that has a bulk density of 0.4 to 0.7 g/ml and a hardness of 1 to 20 N. A high-concentration master batch obtained by blending a granulated colorant and a thermoplastic resin, which comprises 25 to 100 parts by weight of a nigrosine dye in the granulated colorant per 100 parts by weight of the thermoplastic resin. A colored composition comprising a granulated colorant or high-concentration master batch and a thermoplastic resin or thermoplastic elastomer.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a nigrosine granulated colorant that is used to impart a color to thermoplastic resin and for other purposes and has good handlability and good dispersibility in resin, a method of producing the same, a high-concentration master batch using the granulated colorant, a method of producing the same, and a colored composition using the granulated colorant or high-concentration master batch.[0003]2. Description of the Prior Art[0004]Because thermoplastic resins have excellent mechanical and chemical properties, they are widely used in plastic molding products in the field of components for automobiles, electric / electronic products and the like, and the demands are increasing in the field of engineering plastics. Additionally, thermoplastic resins are fitted to a broad range of industrial applications by formulating fibrous reinforcing material in thermoplastic resins to improve the heat resis...

Claims

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Application Information

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IPC IPC(8): C08K5/34C04B14/00
CPCC08K5/0041C09B17/02C09B67/0061C09B67/0095B29B9/00C08K5/00
Inventor HAYASHI, AKIHIKOMORIKAWA, SATONARI
Owner ORIENT CHEM INDS
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