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CN-122013568-A - High-fastness high-temperature-resistant formaldehyde-free color fixing agent and preparation method thereof

CN122013568ACN 122013568 ACN122013568 ACN 122013568ACN-122013568-A

Abstract

The invention discloses a high-fastness high-temperature-resistant formaldehyde-free color fixing agent and a preparation method thereof, and belongs to the technical field of textile printing and dyeing, wherein the color fixing agent consists of heat-stable polyquaternary ammonium salt, high-temperature-crosslinkable amino silicone oil and self-made temperature-sensitive controlled release microspheres; in the subsequent high-temperature baking stage at 160-210 ℃, the amino silicone oil and the fiber are crosslinked to form a firm flexible film, and the final fixation is finished, so that the contradiction between wet friction resistance and light fastness is solved, and the high-color fastness and excellent high-temperature resistance are unified by actively utilizing the high-temperature condition.

Inventors

  • LU HAICAI
  • Ding Shaogui
  • LU JIAMING
  • LU LIANG
  • XU YUYING

Assignees

  • 浙江海联新材料科技有限公司

Dates

Publication Date
20260512
Application Date
20260302

Claims (10)

  1. 1. The high-fastness high-temperature-resistant formaldehyde-free color fixing agent is characterized by comprising the following raw materials in parts by weight: 60-80 parts of basic formaldehyde-free color fixing agent, 5-10 parts of smooth film forming agent and 10-15 parts of temperature-sensitive controlled release functional microsphere; the smooth film forming agent is amino modified silicone oil emulsion; The temperature-sensitive controlled release functional microsphere is of a core-shell structure, the inner core of the temperature-sensitive controlled release functional microsphere is porous nano silicon dioxide loaded with an ultraviolet absorber, and the outer shell of the temperature-sensitive controlled release functional microsphere is a phase change material with a melting point of 72-80 ℃.
  2. 2. The high-fastness high temperature-resistant formaldehyde-free fixing agent according to claim 1, wherein the basic formaldehyde-free fixing agent is a cationic polyquaternium aqueous solution.
  3. 3. The high-fastness high temperature aldehyde-free fixing agent according to claim 2, wherein the cationic polyquaternary ammonium salt is polydimethyldiallyl ammonium chloride.
  4. 4. The high-fastness high-temperature-resistant formaldehyde-free fixing agent according to claim 1, wherein the amino-modified silicone oil emulsion has an ammonia value of 0.2-0.6 mmol/g.
  5. 5. The high-fastness high temperature aldehyde-free fixing agent according to claim 1, wherein the ultraviolet absorber is a benzotriazole compound.
  6. 6. The high-fastness, high temperature resistant, formaldehyde-free fixing agent of claim 1, wherein the phase change material is behenic acid.
  7. 7. A method for preparing the high-fastness high-temperature-resistant formaldehyde-free fixing agent according to any one of claims 1 to 6, which is characterized by comprising the following steps: S1, preparing temperature-sensitive controlled-release functional microspheres, namely loading an ultraviolet absorbent on porous nano silicon dioxide to obtain loaded powder, dispersing the loaded powder in hot water containing an emulsifying agent, adding a molten phase-change material for emulsification, and then cooling to solidify a phase-change material shell to obtain the temperature-sensitive controlled-release functional microspheres; S2, compounding, namely respectively weighing the basic formaldehyde-free color fixing agent, the smooth film forming agent and the temperature-sensitive controlled release functional microspheres according to parts by weight, mixing, and uniformly stirring to obtain the high-fastness high-temperature-resistant formaldehyde-free color fixing agent.
  8. 8. The method according to claim 7, wherein the step S1 specifically comprises: s11, adsorbing and loading, namely dissolving an ultraviolet absorbent in an organic solvent, adding porous nano silicon dioxide, dispersing and stirring to ensure that the adsorption is complete, and removing the solvent to obtain loaded powder; s12, phase-change encapsulation, namely dispersing the loaded powder obtained in the step S11 into hot water containing an emulsifying agent, adding a molten phase-change material at a temperature higher than the melting point of the phase-change material, and performing high-speed shearing emulsification; s13, condensing and forming, namely rapidly cooling the emulsion obtained in the step S12, solidifying the phase change material shell to form solid microspheres, and dispersing the solid microspheres in water for standby after washing.
  9. 9. The use of the high-fastness high-temperature-resistant formaldehyde-free fixing agent according to any one of claims 1-6 in a textile high-temperature dyeing and finishing process.
  10. 10. The use according to claim 9, wherein the high temperature dyeing and finishing process comprises a high temperature treatment process of 160 ℃ or more.

Description

High-fastness high-temperature-resistant formaldehyde-free color fixing agent and preparation method thereof Technical Field The invention relates to the technical field of fabric color fixation, in particular to a high-fastness high-temperature-resistant formaldehyde-free color fixing agent and a preparation method thereof. Background With increasingly stringent environmental regulations, formaldehyde-free fixing agents have become the mainstream of the industry. However, the existing formaldehyde-free color fixing agent has double challenges when pursuing high color fastness, namely, firstly, the improvement of wet rubbing fastness often leads to the reduction of light fastness and hardening of hand feeling, secondly, more seriously, a plurality of products are difficult to endure the high Wen Huanjie which is indispensable in dyeing and finishing processing, and in the high-temperature high-pressure dyeing (120-135 ℃), hot melt pad dyeing (200-220 ℃) or after-finishing high-temperature baking (160-210 ℃), the traditional color fixing agent is easy to decompose or lose efficacy, and cannot keep stable color fixing effect under the high-temperature condition, so that the application of the color fixing agent on textiles is severely limited; the prior art focuses on solving the contradiction of fastness, and the performance is blended by synthesizing complex polymers or simply compounding, however, the hydrophobic ultraviolet absorber is difficult to disperse in a hydrophilic system and is easy to agglomerate or wrap by components such as silicone oil in advance, and the problems of color light change, fastness attenuation and the like are often caused after the prior proposal is subjected to a standard high-temperature process. Therefore, a color fixing agent which not only can cooperatively improve various color fastness, but also can actively adapt to and utilize high-temperature processing conditions to realize uniformity of high fastness and high temperature resistance is needed in the field. The present invention is specifically proposed to solve the above-mentioned technical problems. Disclosure of Invention The invention provides a high-fastness high-temperature-resistant formaldehyde-free color fixing agent, which comprises the following raw materials in parts by weight: 60-80 parts of basic formaldehyde-free color fixing agent, 5-10 parts of smooth film forming agent and 10-15 parts of temperature-sensitive controlled release functional microsphere; the smooth film forming agent is amino modified silicone oil emulsion; The temperature-sensitive controlled release functional microsphere is of a core-shell structure, the inner core of the temperature-sensitive controlled release functional microsphere is porous nano silicon dioxide loaded with an ultraviolet absorber, and the outer shell of the temperature-sensitive controlled release functional microsphere is a phase change material with a melting point of 72-80 ℃. Preferably, the basic formaldehyde-free fixing agent is a cationic polyquaternary ammonium salt aqueous solution. Preferably, the cationic polyquaternary ammonium salt is polydimethyldiallyl ammonium chloride. Preferably, the amino modified silicone oil emulsion has an ammonia value of 0.2-0.6 mmol/g, and within the range, the amino silicone oil can keep enough chemical inertness in the drying stage, avoid pre-crosslinking with fibers to interfere with the uniform distribution of the ultraviolet absorbent, and can be effectively activated in the subsequent high-temperature baking stage to form a firm flexible film layer. Preferably, the ultraviolet absorber is a benzotriazole compound, more preferably UV-326. Preferably, the phase change material is behenic acid, the melting point of the phase change material is 72-80 ℃, and the melting point range is slightly lower than the temperature of a main drying area in a fabric drying stage, so that the microspheres can be accurately triggered and released in the drying stage, and the ultraviolet absorbent can be rapidly planted with fabric fibers by means of moisture evaporation and migration along with evaporation of a large amount of moisture. The invention also provides a preparation method of the high-fastness high-temperature-resistant formaldehyde-free color fixing agent, which comprises the following steps: S1, preparing temperature-sensitive controlled-release functional microspheres, namely loading an ultraviolet absorbent on porous nano silicon dioxide to obtain loaded powder, dispersing the loaded powder in hot water containing an emulsifying agent, adding a molten phase-change material for emulsification, and then cooling to solidify a phase-change material shell to obtain the temperature-sensitive controlled-release functional microspheres; S2, compounding, namely respectively weighing the basic formaldehyde-free color fixing agent, the smooth film forming agent and the temperature-sensitive controlled release functional microspher