Dyeing-assist agent used for aramid fiber dyeing, preparation method and dyeing method thereof

A dyeing aid and aramid fiber technology, applied in the textile field, can solve the problems of reducing the glass transition temperature of aramid fiber, insufficient dyeing depth, low light fastness, etc., and achieve the effects of saving foreign exchange, short process flow and simple operation.

Inactive Publication Date: 2008-12-10
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a dyeing aid for aramid fiber Nomex dyeing, which can reduce the glass transition temperature of aramid fiber in the dyeing...

Method used

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  • Dyeing-assist agent used for aramid fiber dyeing, preparation method and dyeing method thereof
  • Dyeing-assist agent used for aramid fiber dyeing, preparation method and dyeing method thereof
  • Dyeing-assist agent used for aramid fiber dyeing, preparation method and dyeing method thereof

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preparation example Construction

[0052] The preparation method of dye auxiliaries of the present invention is carried out according to the following steps:

[0053] a. take benzoic acid and methanol respectively, use sulfuric acid as a catalyst, then carry out esterification to obtain methyl benzoate,

[0054] Take hydrogen sulfide and tetrahydrofuran respectively, take Al2 O 3 For catalyst, the reaction obtains sulfolane;

[0055] b. According to mass percentage, respectively take 1%~3% of OP-10, 1%~3% of sodium dodecyl sulfonate, 80%~82% of water, 8%~12% of methyl benzoate obtained in the previous step % and sulfolane 4% to 6%, the total amount of each component is 100%, put it into a high-shear emulsifier for emulsification, control the speed of the emulsifier to be 3000r / min, and the emulsification time to be 30min. Dyeing aids.

[0056] The present invention utilizes the above-mentioned dyeing auxiliaries to dye aramid fiber, and the process is as follows figure 1 shown.

[0057] Specifically includ...

Embodiment 1

[0076] Step 1: Take benzoic acid and methanol, and use sulfuric acid as a catalyst to carry out an esterification reaction to obtain methyl benzoate; take hydrogen sulfide and tetrahydrofuran, use Al 2 O 3 As a catalyst, the reaction produces sulfolane. Take OP-102Kg, sodium dodecyl sulfonate 2Kg, water 82Kg, methyl benzoate 8Kg and sulfolane 6Kg respectively, the total amount of each component is 100%, put into a high shear emulsifier for emulsification, The rotating speed of the emulsifying machine is controlled to be 3000 r / min, and the emulsifying time is 30 min. After emulsifying, the dyeing auxiliaries are prepared.

[0077] Step 2: Take sodium hydroxide and degreaser DO respectively, and prepare a pretreatment solution for aramid fabrics. The solution was heated to 100°C, put into the fabric, the bath ratio of the solution and the aramid fabric was controlled to be 50:1, boiled for 30 minutes, and then the fabric was taken out for washing and drying;

[0078] Step 3:...

Embodiment 2

[0082] Step 1: Take benzoic acid and methanol, and use sulfuric acid as a catalyst to carry out an esterification reaction to obtain methyl benzoate; take hydrogen sulfide and tetrahydrofuran, use Al 2 O 3 As a catalyst, the reaction produces sulfolane. Take OP-103Kg, sodium dodecyl sulfonate 1Kg, water 81Kg, methyl benzoate 10Kg and sulfolane 5Kg respectively, the total amount of each component is 100%, put into a high shear emulsifier for emulsification, The rotating speed of the emulsifying machine is controlled to be 3000 r / min, and the emulsifying time is 30 min. After emulsifying, the dyeing auxiliaries are prepared.

[0083] Step 2: respectively take sodium hydroxide and degreaser DO, prepare a solution for aramid fabric pretreatment, control the concentration of sodium hydroxide to be 20g / L, and the concentration of degreaser DO to be 4g / L in the solution. The solution was heated to 110°C, put into the fabric, the bath ratio of the solution and the aramid fabric was ...

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Abstract

The invention discloses a dyeing assistant for aramid dyeing, consisting of the following components in percentage by mass: 8-12 percent of methyl benzoate, 4-6 percent of sulfolane, 1-3 percent of OP-10, 1-3 percent of sodium dodecyl sulfonate and 80-82 percent of water, and the total quantity of the components is 100 percent. A method of putting the raw materials into a high shear mulser for emulsification is adopted to prepare the dyeing assistant. A dyeing method for aramid comprises the following steps that: an aramid fabric is pretreated and then pretreated by using the dyeing assistant; then dyeing, washing, soaping, drying and shaping are carried out to the treated fabric in a conventional method, thus the aramid fabric is dyed. By lowering the vitrification temperature of the aramid, the dyeing method solves the problem that the aramid is difficult to dye and cannot has the dyeing depth reach medium deep color in a dyeing process, is novel in dyeing technique, short in technological process and simple to operate, causes no pollution to environment, and has extensive economic benefit and market benefit.

Description

technical field [0001] The invention belongs to the technical field of textiles, and relates to a dyeing assistant for aramid Nomex dyeing, a preparation method of the dyeing assistant and a method for dyeing aramid Nomex by using the dyeing assistant. Background technique [0002] At present, the most widely used new type of special fiber is Aramid, a high-tech fiber invented and put into production by DuPont in the 1970s. Its macromolecules are generally long chains linked by amide groups and benzene rings, and the stable skeleton structure endows the fiber with excellent chemical stability, thermal stability, high strength and high modulus. Aramid Nomex fiber has a compact macromolecular structure, high crystallinity, high glass transition temperature, and no affinity group. When using conventional dyeing methods to dye aramid fiber, the dye is basically not dyed, and dyeing is very difficult. [0003] At present, foreign countries mainly adopt two methods to solve the c...

Claims

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Application Information

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IPC IPC(8): D06M13/268D06M11/38D06P3/24D06M101/36
Inventor 谭艳君
Owner XI'AN POLYTECHNIC UNIVERSITY
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