Preparation method of superfine coating pigment paste for coloring of Lyocell fiber stock solution

A technology of coating pigments and dope dyeing, applied in the direction of adding pigments and organic dyes in spinning dope, can solve the problem of little research on ultra-fine pigment pastes, and achieve excellent color fastness, high spinnability, no precipitation effect

Inactive Publication Date: 2011-07-20
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although there are many studies on the preparation of ultrafine pigment paste, there are few studies on ultrafine pigment paste for Lyocell fiber dope coloring

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] Get carbon black 15g, polymerizable dispersant ANPS 3g, sodium dodecylbenzene sulfonate 0.3g and deionized water 281.7g, place sand mill and grind 1 hour with 1800r / min speed, make black superfine pigment Water-based dispersion system, and then dropwise add a solution containing 0.006g of azobisisobutyronitrile and 0.3g of styrene solution to continue grinding for 0.5 hours, transfer it to a reaction kettle, feed nitrogen, raise the temperature to 60°C, and react at a constant temperature for 2 Cool down for one hour and discharge, and filter with a 500nm microporous membrane to obtain a black ultrafine coated pigment paste. The physical property indexes are as follows: surface tension σ=37.4mN / m, viscosity η=6.58cP, Z-average particle diameter d=152.4nm.

example 2

[0018] Take C.I. Pigment Yellow 1430g, polymerizable dispersant PMQ 6g, anionic surfactant CNF 0.6g and deionized water 263.4g, place it in a sand mill and grind it at 1800r / min for 1.5 hours to obtain a yellow ultrafine pigment water-based Disperse the system, then add dropwise a solution containing 0.024 g of dimethyl azobisisobutyrate and 1.2 g of methyl methacrylate solution, continue grinding for 0.5 hours, transfer it to a reaction kettle, blow in nitrogen, and raise the temperature to 70°C , constant temperature reaction for 2.5 hours to cool down and discharge, and filter with a 500nm microporous membrane to obtain a yellow ultrafine coated pigment paste. The physical property indexes are as follows: surface tension σ=21.7mN / m, viscosity η=6.12cP, Z-average particle diameter d=148.7nm.

example 3

[0020] Get C.I. Pigment Blue 15:360g, polymerizable dispersant AHPS 12g, anionic surfactant Remibang-A 1.2g and deionized water 226.8g, place in a sand mill and grind for 2 hours at a speed of 1800r / min to obtain Blue ultra-fine pigment water-based dispersion system, then dropwise add the solution containing 0.048g of azobisisoheptanonitrile, 2.4g of hydroxymethacrylic acid formamide to continue grinding for 0.5 hour, transfer to the reaction kettle, feed nitrogen, Raise the temperature to 90°C, react at a constant temperature for 3 hours, cool down and discharge, and filter with a 500nm microporous membrane to obtain a blue ultrafine coated pigment paste. The physical property indexes are as follows: surface tension σ=18.84mN / m, viscosity η=5.76cP, Z-average particle diameter d=155.6nm.

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Abstract

The invention relates to a preparation method of superfine coating pigment paste for the coloring of a Lyocell fiber stock solution, belonging to the field of fine chemical industry. In the invention, with a polymerizable dispersing agent as a main adjuvant, a superfine pigment dispersion is prepared through high-speed dispersion, and then an initiator and a comonomer are dropwise added to the dispersion, then continuously dispersed with a high speed and heated to react for a certain time so that the polymer is coated on the surface of pigment. The prepared superfine coating pigment paste for the coloring of the Lyocell fiber stock solution has high dispersion stability, good compatibility with a Lyocell fiber spinning solution and high spinnability; and Lyocell fiber coloring filaments obtained through spinning have coloring uniformity, pure color and cluster and excellent color fastness and save the follow-up dyeing and processing.

Description

technical field [0001] The invention belongs to the field of fine chemical industry, and in particular relates to a preparation method of ultrafine coated pigment paste for Lyocell fiber stock solution coloring. technical background [0002] Compared with viscose fiber, Lyocell fiber has the characteristics of simple production process, less environmental pollution and excellent fiber performance, which has attracted people's attention in recent years. Lyocell fiber stock solution coloring is to directly add pigment paste into Lyocell fiber spinning solution, after mixing evenly, a colored colloidal stream will be formed through the spinneret, and then go through a coagulation bath to produce Lyocell colored yarn. In the dope coloring process, the added color paste has a great influence on the spinnability of the spinning solution, the color and mechanical properties of the colored fiber, which is the key to the smooth production of Lyocell fiber colored yarn. Realizing the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/20D01F1/04
Inventor 付少海张凯王春霞田安丽王潮霞
Owner JIANGNAN UNIV
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