Search

CN-122013565-A - Printing and dyeing auxiliary agent and dyeing method thereof

CN122013565ACN 122013565 ACN122013565 ACN 122013565ACN-122013565-A

Abstract

The application relates to a printing and dyeing auxiliary agent and a dyeing method thereof, wherein the printing and dyeing auxiliary agent comprises the following raw materials, by weight, 96-98 parts of anhydrous sodium sulfate, 1.2-1.8 parts of a multifunctional dispersing agent DM-1501, 0.8-1.2 parts of an 8-hydroxy-2-methylquinolinyl Gemini surfactant and 0.3-0.7 part of alkyl glycoside, and the raw materials for preparing the 8-hydroxy-2-methylquinolinyl Gemini surfactant comprise 8-hydroxy-2-methylquinoline and sulfonate. The dyeing auxiliary agent can improve the dyeing uniformity and color fastness of cotton cakes. The K/S value of the dyed cotton cake is more than 26.5, the dye-uptake is more than 70%, the wet-rub fastness is more than 3 levels, and the water-washing fastness is more than 4 levels.

Inventors

  • LIU ZIXUAN
  • LIU XING
  • LUO XIANSONG
  • LI YONGLIANG
  • LIAO WENYONG
  • YAO YITING
  • ZHOU XIANG

Assignees

  • 荆州丝路轩行科技有限公司

Dates

Publication Date
20260512
Application Date
20260325

Claims (10)

  1. 1. A printing and dyeing auxiliary agent is characterized by comprising the following raw materials, by weight, 96-98 parts of anhydrous sodium sulfate, 1.2-1.8 parts of a multifunctional dispersing agent DM-1501, 0.8-1.2 parts of an 8-hydroxy-2-methylquinolinyl Gemini surfactant and 0.3-0.7 part of alkyl glycoside; The preparation raw materials of the 8-hydroxy-2-methylquinolinyl Gemini surfactant comprise 8-hydroxy-2-methylquinoline and sulfonate.
  2. 2. The printing and dyeing auxiliary according to claim 1, wherein the weight ratio of the 8-hydroxy-2-methylquinolinyl Gemini surfactant to the alkyl glycoside is (8-28): 7.
  3. 3. The printing and dyeing auxiliary agent according to claim 1, wherein the molar ratio of 8-hydroxy-2-methylquinoline to sulfonate in the 8-hydroxy-2-methylquinolinyl Gemini surfactant is 21 (9-14).
  4. 4. The printing and dyeing auxiliary agent according to claim 1, wherein the preparation method of the 8-hydroxy-2-methylquinolinyl Gemini surfactant comprises the following steps: a1, adding polyethylene glycol and p-toluenesulfonyl chloride into a reaction vessel, adding dichloromethane, stirring uniformly, cooling, adding triethylamine, reacting, filtering, carrying out water absorption and sedimentation on filtrate, separating liquid, taking an organic phase, drying, filtering, and carrying out rotary evaporation to obtain sulfonate; a2, adding the sulfonate in the step a1 into N, N-dimethylformamide, and stirring and dissolving under inert gas to obtain a sulfonate solution; a3, adding 8-hydroxy-2-methylquinoline into a reaction vessel, adding N, N-dimethylformamide, stirring, adding sodium hydride at 0-10 ℃, stirring, adding the sulfonate solution in the step a2 into the reaction vessel, reacting, cooling, extracting, and drying to obtain a crude product; and a4, washing, drying, filtering, rotary steaming and drying the crude product obtained in the step a3 to obtain the 8-hydroxy-2-methylquinolinyl Gemini surfactant.
  5. 5. The printing and dyeing auxiliary according to claim 4, wherein in the step a3, the molar ratio of 8-hydroxy-2-methylquinoline to sodium hydride is 1 (2-2.4).
  6. 6. The printing and dyeing auxiliary according to claim 4, wherein in the step a4, the washing condition of the crude product in the step a3 is washing with hydrochloric acid, sodium bicarbonate and saline solution.
  7. 7. A method of dyeing a printing adjuvant according to any one of claims 1 to 6, comprising the steps of: S1, weighing loose cotton and beating into cakes to obtain cotton cakes; s2, hanging the cotton cake obtained in the step S1 into a dye vat, adding a low-temperature pretreatment agent and sodium carbonate, heating to 55-65 ℃ for treatment for 15-25min, and draining to obtain a pretreated cotton cake; S3, dyeing the pretreated cotton cake obtained in the step S2, adding water and dye, running for 8-12min, adding printing and dyeing auxiliary agent, heating to 55-65 ℃ and preserving heat for 3-7min, adding sodium carbonate, preserving heat and fixing color for 50-70min, stopping a main pump, uncapping, cooling and draining to obtain a semi-finished product dyed cotton cake; s4, performing post-treatment on the semi-finished dyed cotton cake obtained in the step S3, feeding water, washing with cold water, draining, feeding water again, adding acetic acid, washing with acid, draining, feeding water again, adding soaping agent, treating at 75-85 ℃ for 10-20min, draining, feeding water again, washing with cold water, and draining to obtain the semi-finished post-treated cotton cake; S5, performing fixation and oversoftening treatment on the semi-finished product post-treatment cotton cake obtained in the step S4, adding a fixation agent, a softening agent and an antistatic agent into water, treating for 12-18min at 50-60 ℃, and draining to obtain a semi-finished product fixation cotton cake; S6, dehydrating, drying and packaging the semi-finished product color-fixed cotton cake obtained in the step S5 to obtain the finished product dyed cotton cake.
  8. 8. The dyeing method of dyeing auxiliary according to claim 7, wherein in the step S2, the mass concentration of the low-temperature pretreatment agent is 1.5-2.5g/L, and the mass concentration of the sodium carbonate is 1-3g/L.
  9. 9. The dyeing method of dyeing auxiliary according to claim 7, wherein in the step S3, the mass concentration of the dyeing auxiliary is 60-70g/L and the mass concentration of the soda is 15-25g/L.
  10. 10. The dyeing method of dyeing auxiliary according to claim 7, wherein the mass concentration of acetic acid in the pickling in the step S4 is 1-2g/L.

Description

Printing and dyeing auxiliary agent and dyeing method thereof Technical Field The application relates to the technical field of printing and dyeing auxiliary agents, in particular to a printing and dyeing auxiliary agent and a dyeing method thereof. Background Bulk cotton (bulk fiber) dyeing is an important fundamental link in the textile printing industry. However, the existing loose cotton cake dyeing process and conventional matched printing and dyeing auxiliary agents have the obvious defects that firstly, the level dyeing permeability is poor, the high-compaction thick cotton cake causes high dye liquor penetration resistance, the dye is easy to adsorb and fix on the outer layer and the inner layer is not enough to exchange, the problem of 'outer deep and inner shallow' color patterns is generated, secondly, the dyeing rate and the color fastness of dark color dyeing are difficult to be compatible, the dye in the high-concentration dye liquor is easy to gather, the dispersibility of the conventional auxiliary agents is reduced in a high-salt and high-alkali environment, floating color accumulation is caused, the cleaning is difficult to be carried out due to the difficulty in washing the cotton cake, and the wet friction and the washing color fastness of a finished product are low. Therefore, development of a novel printing and dyeing auxiliary agent and a dyeing method thereof are needed in the art, and high-efficiency dispersing and penetration promoting capability can be maintained in a complex dye bath environment, so that the technical problems of poor dyeing uniformity and poor dark color fastness in dyeing of loose cotton thick cakes are solved. Disclosure of Invention The invention provides a printing and dyeing auxiliary agent and a dyeing method thereof, which can solve the problems of poor uniformity and poor dark color fastness of thick cakes. In the first aspect of the application, the printing and dyeing auxiliary agent comprises, by weight, 96-98 parts of anhydrous sodium sulfate, 1.2-1.8 parts of a multifunctional dispersing agent DM-1501, 0.8-1.2 parts of an 8-hydroxy-2-methylquinolinyl Gemini surfactant and 0.3-0.7 part of alkyl glycoside, wherein the preparation raw materials of the 8-hydroxy-2-methylquinolinyl Gemini surfactant comprise 8-hydroxy-2-methylquinoline and sulfonate. By adopting the technical scheme, the invention provides the printing and dyeing auxiliary agent which can promote cotton cakes to be uniformly dyed and improve the wet rubbing color fastness and washing color fastness of the cotton cakes. This is probably because the 8-hydroxy-2-methylquinolinyl Gemini surfactant has a structure of "double-ended", shows salt-resistant alkali-resistant stability in dye baths and solubilizing and dispersing ability to dyes, while the alkyl glycoside has excellent wetting permeability, after the two are compounded, the alkyl glycoside rapidly reduces the surface tension and provides a permeation channel, the Gemini surfactant stabilizes the disperse dyes and realizes controllable slow dyeing, and the two synergistically realize internal leveling and fixation. Further, the K/S value of the cotton cake after dyeing is >26.5, the dye-uptake is >70%, the wet rub fastness is >3 grade, and the water fastness is >4 grade. Optionally, the weight ratio of the 8-hydroxy-2-methylquinolinyl Gemini surfactant to the alkyl glycoside is (8-28): 7. By adopting the technical scheme, the dosage of the 8-hydroxy-2-methylquinolinyl Gemini surfactant and the dosage of the alkyl glycoside are adjusted according to the weight ratio, and when the weight ratio of the 8-hydroxy-2-methylquinolinyl Gemini surfactant to the alkyl glycoside is (8-28): 7, the cotton cake can be uniformly dyed, and the wet rubbing color fastness and the washing color fastness of the cotton cake can be improved. Optionally, in the 8-hydroxy-2-methylquinolinyl Gemini surfactant, the molar ratio of 8-hydroxy-2-methylquinoline to sulfonate is 21 (9-14). By adopting the technical scheme, the dosage of 8-hydroxy-2-methylquinoline and sulfonate is adjusted according to the molar ratio, and when the molar ratio of 8-hydroxy-2-methylquinoline to sulfonate is 21 (9-14), the cotton cake can be uniformly dyed, and the wet color fastness and the washing fastness are good. Optionally, the preparation method of the 8-hydroxy-2-methylquinolinyl Gemini surfactant comprises the following steps: a1, adding polyethylene glycol and p-toluenesulfonyl chloride into a reaction vessel, adding dichloromethane, stirring uniformly, cooling, adding triethylamine, reacting, filtering, carrying out water absorption and sedimentation on filtrate, separating liquid, taking an organic phase, drying, filtering, and carrying out rotary evaporation to obtain sulfonate; a2, adding the sulfonate in the step a1 into N, N-dimethylformamide, and stirring and dissolving under inert gas to obtain a sulfonate solution; a3, adding 8-hydroxy-2-methylquinoline into a reac