Pretreated pigment and preparation method thereof

A pretreatment and pigment technology, applied in dyeing physical treatment, dyeing polymer organic compound treatment, organic dyes, etc., can solve the problems of low shear force, low production efficiency, troublesome operation, etc., and achieve improved dispersion performance and production efficiency High, easy-to-operate effect

Active Publication Date: 2014-07-09
广东波斯科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing pretreatment pigment technology generally uses polyethylene wax, EVA (ethylene-vinyl acetate copolymer) wax and other single melting point dispersants as the main components. During the process of pigment treatment, the pigment cannot be wetted before melting, and the viscosity of the system is rapid after melting. The decline causes the shear force to be too low and it is difficu

Method used

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  • Pretreated pigment and preparation method thereof
  • Pretreated pigment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weighing and ingredients according to the following formula: YY-503 15%, phthalocyanine blue 75%, auxiliary dispersant 10%.

[0031] The above components are premixed uniformly with a mixer, and then extruded with a twin-screw extruder with a length-to-diameter ratio of 36:1. ℃, the temperature from the fifth zone to the die head is set to 160 ℃, and the rotating speed of the main engine is 400 rpm.

[0032] Add 40% of the above-mentioned pretreated pigments to polyethylene masterbatch to obtain high-concentration blue masterbatch, add 5% of the above-mentioned color masterbatch to LDPE to prepare a film by blow molding, and check the number and size of color points.

Embodiment 2

[0034] Weighing and ingredients according to the following formula: YY-503 15%, phthalocyanine green 75%, co-dispersant 15%.

[0035] The above components are premixed uniformly with a mixer, and then extruded and granulated with a twin-screw extruder with a length-to-diameter ratio of 30:1. The temperature of the extruder is set to: Set at 80°C, the temperature from the fifth zone to the die head is set at 150°C, and the rotating speed of the main engine is 300 rpm.

[0036] Add 50% of the above-mentioned pretreated pigments to polyethylene masterbatch to obtain high-concentration green masterbatch, add 5% of the above-mentioned color masterbatch to LDPE to prepare a film by blow molding, and check the number and size of color points.

Embodiment 3

[0038] Weighing and ingredients according to the following formula: YY-503 8%, titanium dioxide 87%, auxiliary dispersant 5%.

[0039] The above components are premixed uniformly with a mixer, and then extruded and granulated with a twin-screw extruder with a length-to-diameter ratio of 36:1. Set at 70°C, the temperature from the fifth zone to the die head is set at 130°C, and the rotating speed of the main engine is 100 rpm.

[0040] Add 70% of the above-mentioned pretreated pigments to polyethylene masterbatch to make high-concentration white masterbatch, add 5% of the above-mentioned color masterbatch to LDPE cast film, and check the number and size of color points.

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Abstract

The invention relates to a pretreated pigment and a preparation method thereof. The pretreated pigment comprises following components by weight: 8-15 parts of a double-melting-point dispersant, 55-87 parts of a pigment, and 5-30 parts of an assisted dispersant, wherein the number-average molecular weight of the double-melting-point dispersant is 3000-5000, the lower melting point of the double-melting-point dispersant is 75+-5 DEG C and the higher melting point of the double-melting-point dispersant is 150+-10 DEG C. The pretreated pigment is prepared by steps of uniformly mixing in advance, extruding the mixture from a twin-screw extruder, cooling and smashing. By adoption of the double-melting-point dispersant, the agglomerate pigment can be effectively scattered and the pigment can be fully dispersed and be stable. The preparation method has advantages of simple operation, high production efficiency, less dust, and the like, and continuous production can be achieved. The dispersibility of the pretreated pigment can be significantly improved. The pretreated pigment can be used for preparing color master batch with better performances.

Description

technical field [0001] The invention belongs to the technical field of plastic coloring, and in particular relates to a pretreatment pigment and a preparation method thereof. Background technique [0002] Plastic coloring can be directly colored by pigments, or colored by pigment concentrates (masterbatches). For products such as films and fibers, the dispersion of pigments has a great influence on the coloring quality. Because when the pigment is not well dispersed, firstly, there will be coloring defects and defects such as color spots and stains, and secondly, the pigment aggregation points will cause local stress concentration, which will have a negative impact on the molding process or the final mechanical properties and performance of the product. [0003] Therefore, the pre-dispersion of pigments is of great significance for the preparation of high-quality films and fiber products. The existing pretreatment pigment technology generally uses polyethylene wax, EVA (et...

Claims

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Application Information

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IPC IPC(8): C09B67/00C09C1/36C09C1/56C09C3/10C09C3/04
Inventor 阳范文刘鹏黎泽顺卢俊文
Owner 广东波斯科技股份有限公司
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