阅读说明：本技术 涤纶超细纤维染色促进剂的制备方法 (Preparation method of polyester superfine fiber dyeing accelerant ) 是由 陈焜 何齐海 沈昌宇 于 2019-09-23 设计创作，主要内容包括：本发明涉及一种涤纶超细纤维分散染料染色促进剂的制备方法。促进剂按重量百分比组成为：酯类化合物55～67％,复合乳化剂20～34％,异丙醇11～14％。该染色促进剂具有优异的水溶性,不仅能够降低涤纶分散染料染色时的温度,又有优异的匀染性、染料分散性和色迹修复性,有效节约能源和减少染色过程中问题的产生。(The invention relates to a preparation method of a dyeing accelerant for polyester superfine fiber disperse dye. The accelerant comprises the following components in percentage by weight: 55-67% of ester compounds, 20-34% of composite emulsifier and 11-14% of isopropanol. The dyeing promoter has excellent water solubility, can reduce the temperature of the polyester disperse dye during dyeing, has excellent level-dyeing property, dye dispersibility and color mark repairability, effectively saves energy and reduces the generation of problems in the dyeing process.)

1. The preparation method of the polyester superfine fiber dyeing accelerant is characterized by comprising the following steps:

the preparation method comprises the following steps:

comprises the following components in percentage by weight: 55-67% of ester compound, 20-34% of composite emulsifier and 11-14% of isopropanol;

(II) preparing a composite emulsifier:

the composite emulsifier is a compound of emulsifier A and plant polyene phenol polyoxyethylene ether ammonium sulfonate mixed according to a ratio of 1: 1;

wherein, EO number of the plant polyene phenol polyoxyethylene ether ammonium sulfonate is 9, and the synthesis method and the steps of the emulsifier A are as follows:

adding 190-195 parts of dimethyl terephthalate, 105-115 parts of benzyl alcohol, 380-420 parts of PEG400 and 1-2 parts of zinc acetate in a reaction vessel provided with a stirrer, nitrogen and a thermometer in parts by mass, then starting nitrogen and slowly heating to 140-150 ℃, starting stirring and heating to 170-180 ℃ after materials are molten, preserving heat for 2-3 hours at the temperature, and cooling to below 50 ℃ to obtain an emulsifier A, wherein the reaction equation is as follows:

wherein n is 8-10.

2. The method for preparing the dyeing promoter for the polyester superfine fibers according to claim 1, which is characterized in that: the ester compound is any one of benzyl benzoate and diethylene glycol dibenzoate.

Technical Field

The invention relates to the field of textile auxiliary agents, in particular to a preparation method of a polyester superfine fiber dyeing accelerant.

Background

The superfine terylene fiber has extremely fine fineness, so that the rigidity of the fiber is greatly reduced, and the fabric has extremely soft hand feeling. The superfine fiber can also increase the layered structure of the fiber, increase the specific surface area and capillary effect, and lead the reflected light inside the fiber to be distributed more finely on the surface, thus leading the fiber to have silky elegant luster and good moisture absorption and dispersion. However, the change of the fiber structure and morphology of the ultrafine fibers also causes problems in dyeing. On one hand, the superfine fiber has low linear density and large specific surface area, the adsorption speed of the fiber to dye is increased, the dye is easy to accumulate on the surface of the fiber, the dyeing leveling property is poor, and color marks and color spots appear. On the other hand, the amorphous area of the superfine fiber has high specific gravity, and the dye is easy to migrate to the surface of the fiber when being heated, so that the migrated dye is difficult to clean, and the color fastness (including washing fastness and rubbing fastness) is reduced. Aiming at the problems in the superfine fiber dyeing process, people adopt the dyeing accelerant of common terylene to improve the level-dyeing property and the dyeing fastness. However, the emulsifier in the accelerator has a high proportion, so that the emulsifying efficiency of the ester compound is low, the color yield of the fabric is easily affected, and the residue of the emulsifier is easy to form color spots, so that a new dyeing problem is caused.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a preparation method of an efficient polyester superfine fiber disperse dye dyeing accelerant.

In order to achieve the purpose, the invention adopts the following technical scheme:

the preparation method of the polyester superfine fiber dyeing accelerant comprises the following steps:

the preparation method comprises the following steps:

comprises the following components in percentage by weight: 55-67% of ester compound, 20-34% of composite emulsifier and 11-14% of isopropanol;

(II) preparing a composite emulsifier:

the composite emulsifier is a compound of emulsifier A and plant polyene phenol polyoxyethylene ether ammonium sulfonate mixed according to a ratio of 1: 1;

wherein, EO number of the plant polyene phenol polyoxyethylene ether ammonium sulfonate is 9, and the synthesis method and the steps of the emulsifier A are as follows:

adding 190-195 parts of dimethyl terephthalate, 105-115 parts of benzyl alcohol, 380-420 parts of PEG400 and 1-2 parts of zinc acetate in a reaction vessel provided with a stirrer, nitrogen and a thermometer in parts by mass, then starting nitrogen and slowly heating to 140-150 ℃, starting stirring and heating to 170-180 ℃ after materials are molten, preserving heat for 2-3 hours at the temperature, and cooling to below 50 ℃ to obtain an emulsifier A, wherein the reaction equation is as follows:

wherein n is 8-10.

Preferably, the ester compound is any one of benzyl benzoate and diethylene glycol dibenzoate.

The novel nonionic emulsifier A is synthesized by adopting benzyl alcohol, dimethyl terephthalate and PEG400, has high similarity with benzyl benzoate and diethylene glycol dibenzoate in structure, and has excellent emulsibility on ester compounds. And the emulsifier A has certain solubilization and better dispersibility on the disperse dye. According to the principle of structural similarity, the compounded dyeing accelerant can regulate and control the microstructure of the polyester fiber in the dyeing process, reduce the vitrification temperature of the fiber, improve the swelling property of the fiber, strengthen the movement of a molecular chain in an amorphous area of the fiber, promote the dye to diffuse into the fiber, and improve the dye uptake and the dyeing fastness; on the other hand, the dye affinity of the accelerator can reduce the aggregation of disperse dyes, and the aggregated dyes are solubilized, dispersed and re-dyed, so that the aim of color correction and level dyeing is fulfilled. In addition, the addition of the plant ammonium polyene phenol polyoxyethylene ether sulfonate is safe and environment-friendly, can effectively improve the water solubility of the accelerator and the cloud point of the composite emulsifier, and avoids the dyeing problem caused by the deposition of the emulsifier.

Detailed Description

The invention is further described below by means of specific embodiments.