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Modified cation edible pigment cotton dyeing technique

A cationic modifier and food coloring technology, which is applied in dyeing, textile and papermaking, fiber treatment, etc., can solve the problems of low tinting strength, high cost, toxicity, etc., and achieve good modification effect, enhanced reactivity, and reaction strong effect

Inactive Publication Date: 2014-12-24
WUXI DONGXIN WEAVING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantages of natural pigments are high safety (except for a few), rich resources, but poor stability, low tinting power, and high cost
[0003] At present, most of the dyes, auxiliaries, and intermediates used for dyeing textiles are also quite toxic, and the pollution to the environment during the dyeing and finishing process is also inevitable.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A process for dyeing cotton with cationic modified food coloring, which comprises: cationic modification treatment→hot water washing→cold water washing ((3 times)→squeezing dry→drying→dyeing→water washing→soaping→water washing→drying;

[0042] The cationic modification prescription is: cationic modifier 4%owf; NaOH 2g / L; temperature 60°C; time 20min; liquor ratio 20:1.

[0043]The dyeing prescription is: food coloring 5% owf; Yuanming powder 10g / L; pH value 7; temperature 70°C; time 30min; liquor ratio 20:1.

[0044] The preparation method of the cationic modifier comprises the following steps in turn: (1) reacting concentrated hydrochloric acid and trimethylamine aqueous solution to generate intermediate trimethylamine hydrochloride; (2) under the condition of ethanol as solvent, trimethylamine hydrochloride Reaction with epichlorohydrin to obtain products. Wherein the massfraction of concentrated hydrochloric acid is 36%~38% in the step (1), the massfraction of trime...

Embodiment 2

[0046] A process for dyeing cotton with cationic modified food coloring, which comprises: cationic modification treatment→hot water washing→cold water washing ((3 times)→squeezing dry→drying→dyeing→water washing→soaping→water washing→drying;

[0047] Cationic modification formula: cationic modifier 3%owf; NaOH 1.5g / L; temperature 50°C; time 15min; liquor ratio 18:1;

[0048] Dyeing prescription: food coloring 4% owf; Yuanming powder 8g / L; pH value 6; temperature 60°C; time 25min; liquor ratio 18:1.

[0049] Wherein, the preparation method of cationic modifying agent comprises the following steps in turn: (1) generate intermediate trimethylamine hydrochloride by the reaction of concentrated hydrochloric acid and trimethylamine aqueous solution; (2) under the condition of ethanol as solvent, trimethylamine salt Acetate reacts with epichlorohydrin to obtain the product. Wherein the massfraction of concentrated hydrochloric acid is 36%~38% in the step (1), the massfraction of tri...

Embodiment 3

[0051] A process for dyeing cotton with cationic modified food coloring, which comprises: cationic modification treatment→hot water washing→cold water washing ((3 times)→squeezing dry→drying→dyeing→water washing→soaping→water washing→drying;

[0052] Cationic modification formula: cationic modifier 5%owf; NaOH 2.5g / L; temperature 70°C; time 25min; liquor ratio 22:1;

[0053] Dyeing prescription: food coloring 6% owf; Yuanming powder 12g / L; pH value 8; temperature 80°C; time 35min; liquor ratio 22:1.

[0054] Wherein, the preparation method of cationic modifying agent comprises the following steps in turn: (1) generate intermediate trimethylamine hydrochloride by the reaction of concentrated hydrochloric acid and trimethylamine aqueous solution; (2) under the condition of ethanol as solvent, trimethylamine salt Acetate reacts with epichlorohydrin to obtain the product. Wherein the massfraction of concentrated hydrochloric acid is 36%~38% in the step (1), the massfraction of tr...

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Abstract

The invention relates to a modified cation edible pigment cotton dyeing technique. The process of the technique comprises the following steps: modifying cations, washing with hot water, washing with cold water for 3 times, squeezing, drying, dyeing, washing, washing with soap, washing and drying. According to the technique, the dyeing depth and every fastness of the obtained product can meet requirements; the agent is safe; the technique is simple and is an efficient, energy-saving and environment-friendly technique; as the dyeing rate is high, the residual dyeing liquid is convenient to purify.

Description

technical field [0001] The invention relates to the field of textiles, in particular to a process for dyeing cotton with cationic modified food coloring. Background technique [0002] Food coloring is a food additive for the purpose of food coloring, sometimes called food dye or coloring agent. Food coloring can be divided into two categories according to the source: natural coloring and synthetic coloring. The advantages of synthetic pigments are bright colors, strong tinting strength, not easy to fade, low dosage, and stable performance. The advantages of natural pigments are high safety (except for a few), abundant resources, but poor stability, low tinting power, and high cost. [0003] At present, most of the dyes, auxiliaries, and intermediates used for dyeing textiles are also quite toxic, and the pollution to the environment during the dyeing and finishing process is also inevitable. Food coloring has the characteristics of non-toxicity, little pollution, and low ...

Claims

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Application Information

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IPC IPC(8): D06M13/463D06M11/38D06P1/00D06P1/673D06P3/60D06M101/06
Inventor 于锦清
Owner WUXI DONGXIN WEAVING
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