CN104195847A - Method for reducing dyeing rate of reactive dye solvent system - Google Patents

Abstract

The invention relates to a method for reducing a dyeing rate of a reactive dye solvent system. The method comprises the following steps: (1) dyeing cotton fabrics by use of a dip dyeing process, namely, in the dyeing process, preparing a reactive dye into an organic solvent/water dye liquor, adding at least one cationic surfactant to the dye liquor, next, putting the pre-swelled cotton fabrics with 60%-100% of liquid into the dye liquor with a dyeing bath ratio of 1:5 to 1:2, and heating; and (2) adding sodium carbonate according to the volume of water in the dye bath, then heating, and performing water washing, soaping, water washing and drying on the fabrics after heat preserved fixation is finished. The method for reducing the dyeing rate of the reactive dye solvent system is used for overcoming the defects of uneven dyeing and white warp-weft interweaving points caused by too fast dyeing with a reactive dye in co-solvent dyeing, and the method is simple in process and convenient to operate, and has no special requirement on the dye and equipment; large-scale production can be performed by use of conventional equipment; as a result, the method has wide application prospect.

Description

A kind of method that reduces REACTIVE DYES dicyandiamide solution dyeing rate

Technical field

The invention belongs to dyeing and finishing technique field, particularly a kind of method that reduces REACTIVE DYES dicyandiamide solution dyeing rate.

Background technology

At present, how under salt-free low-salt conditions, make REACTIVE DYES dye that cellulose fibre obtains high degree of exhaustion and degree of fixation becomes one of focus of colourist's research in recent years.The research of reactive dye salt-free dyeing mainly concentrates on the following aspects: (1) changes the structure of dyestuff; (2) modified cellulose fibre; (3) adopt new dyeing; (4) use salt-free, substitute salt assitant; (5) use non-water (few water) medium dyeing system.

The research of non-aqueous media system mainly contains organic solvent solution dyeing, supercritical carbon dioxide fluid dyeing, ionic liquid dyeing, the dyeing of organic solvent reversed phase micelle.The method of organic solvent solution dyeing has the pre-swelling method of alkali, water and polar organic solvent, can improve dye-uptake and the degree of fixation of dyestuff, but because the solubility in dye bath is limited, thus colouring is very fast, permeability and level-dyeing property poor.Also can first in DMF, dye, then add trichloro-ethylene in batches, reach improve infiltrative effect progressively to reduce the solubility of dyestuff, but this is also to dyestuff, the dissolubility in organic solvent has proposed higher requirement.Further improved method is the homogeneous phase mixed solvent that uses a small amount of water and organic solvent to form, and pre-water swollen fiber is dyeed at dicyandiamide solution." a kind of REACTIVE DYES cosolvent decoration method (201310195339.7) of cellulosic fabric " used the organic solvent that can dissolve each other with water to dye, reduce the solubility of dyestuff in the ratio of water by changing organic solvent, promote to dye fiber on dyestuff, can obtain higher dye-uptake and degree of fixation, without adding, electrolyte is short to be dyed dyeing course, and few low alkali of water in dye fixing process.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of method that reduces REACTIVE DYES dicyandiamide solution dyeing rate.The method has been avoided when by REACTIVE DYES cosolvent decoration method, for obtaining uneven dyeing that high rate of dyeing and degree of fixation cause and the longitude and latitude white point that interweaves.

A method that reduces REACTIVE DYES dicyandiamide solution dyeing rate, comprises the steps:

(1) adopt exhaust process to dye to COTTON FABRIC, in dye process, REACTIVE DYES is mixed with to the dye liquor that solvent is organic solvent/water, in dye liquor, add at least one cationic surface active agent, the pre-swelling COTTON FABRIC that is 60～100% by liquid carrying rate again drops in dye liquor, dye bath ratio is 1: 5～1: 20, heats up;

(2) add soda ash by the volume of water in dye liquor, then heat up, insulation fixation finish after by fabric washing, soap, wash, dry;

The organic solvent that step (1) is described and the volume ratio of water are 1: 1～9: 1.

The described organic solvent of step (1) is ethanol, propylene glycol monomethyl ether, normal propyl alcohol, isopropyl alcohol, acetone, the tert-butyl alcohol, acetonitrile, isobutanol or glycol dimethyl ether.

The described cationic surfactant concentration in dye liquor of step (1) is 0.01～5g/L; REACTIVE DYES concentration is 0.1～8%owf.

The described heating process of step (1) is for being warming up to 40～80 DEG C and be incubated 20～60min with the programming rate of 1～2 DEG C/min; The described heating process of step (2) is for being warming up to 40～100 DEG C and be incubated 30～60min with the programming rate of 1～2 DEG C/min.

The described REACTIVE DYES of step (1) is a chloro-s-triazine class REACTIVE DYES, dichloro s-triazine class REACTIVE DYES, vinyl sulfone(RemzaolHuo Xingranliaohuoxingjituan) class REACTIVE DYES, a two chloro-s-triazine class REACTIVE DYES or one chloro-s-triazine/vinyl sulfone double-active base class REACTIVE DYES.

The described cationic surfactant of step (1) is quaternary.

The length C of the hydrophobic carbochain of the described cationic surfactant of step (1) ₄～C ₁₈.

Described quaternary is single (two) long chain alkyl ammonium salt, Gemini double type quaternary ammonium salt or heterocyclic quaternary ammonium salt.

The described soda ash addition of step (2) is 1～20g/L.

beneficial effect

The present invention has avoided when by REACTIVE DYES cosolvent decoration method, and for obtaining uneven dyeing that high rate of dyeing and degree of fixation cause and the longitude and latitude white point that interweaves, the product quality making is consistent with common process.

Technical scheme technique of the present invention is simple, convenient operation, without particular/special requirement, utilizes normal dyeing equipment just can carry out large-scale production to REACTIVE DYES and equipment.

Detailed description of the invention

Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment are only not used in and limit the scope of the invention for the present invention is described.In addition should be understood that those skilled in the art can make various changes or modifications the present invention after having read the content of the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.

Embodiment 1

Ethanol is joined in the aqueous solution of dissolving dye, being made into volume ratio is 9: 1 cosolvent solution, in cosolvent solution, add the cationic surfactant of 0.01g/L, at ambient temperature, pre-swollen cellulose (liquid carrying rate 60%) fabric is immersed in dye liquor; bath raio 1: 10; be then warming up to 60 DEG C of dyeing temperatures with the speed of 1 DEG C/min; and be incubated 60min; then add soda ash solution 5ml (5g/L), be warming up to 80 DEG C of color fixing temperatures and be incubated 30min, fabric takes out; through washing, soap, washing, and dries.Add after cationic surfactant, discovery can drop to 41% by 83% by the dye-uptake of 20min, and final degree of fixation is basically identical.

Dye liquor prescription is as follows: reactive brilliant red KE-7B (C.I. active red 141) 1%, and cationic surfactant 0.5g/L, structure is as follows:

Embodiment 2

Propylene glycol monomethyl ether is joined in the aqueous solution of dissolving dye, be made into 5: 1 cosolvent solution of volume ratio, in cosolvent solution, add the cationic surfactant of 1g/L, at ambient temperature, pre-swollen cellulose (liquid carrying rate 80%) fabric is immersed in dye liquor; bath raio 1: 20; be then warming up to 40 DEG C of dyeing temperatures with the speed of 1.5 DEG C/min; and be incubated 40min; then add soda ash solution 1ml (20g/L), be warming up to 70 DEG C of color fixing temperatures and be incubated 60min, fabric takes out; through washing, soap, washing, and dries.Add after cationic surfactant, discovery can drop to 35% by 71% by the dye-uptake of 20min, and final degree of fixation is basically identical.

Dye liquor prescription is as follows: reactive dark blue M-2GE (C.I. active blue 19 4) 1%, and cationic surfactant 1g/L, structure is as follows:

Embodiment 3

Isopropyl alcohol is joined in the aqueous solution of dissolving dye, be made into 7: 1 cosolvent solution of volume ratio, in cosolvent solution, add the cationic surfactant of 5g/L, at ambient temperature, pre-swollen cellulose (liquid carrying rate 100%) fabric is immersed in dye liquor; bath raio 1: 15; be then warming up to 70 DEG C of dyeing temperatures with the speed of 2 DEG C/min; and be incubated 40min; then add soda ash solution 3ml (10g/L), be warming up to 100 DEG C of color fixing temperatures and be incubated 20min, fabric takes out; through washing, soap, washing, and dries.Add after cationic surfactant, discovery can drop to 38% by 74% by the dye-uptake of 20min, and final degree of fixation is basically identical.

Dye liquor prescription is as follows: active yellow KE-4R (C.I. active yellow 84) 1%, and cationic surfactant 2g/L, structure is as follows:

Embodiment 4

EGME is joined in the aqueous solution of dissolving dye, be made into 8: 1 cosolvent solution of volume ratio, in cosolvent solution, add the cationic surfactant of 3g/L, at ambient temperature, pre-swollen cellulose (liquid carrying rate 60%) fabric is immersed in dye liquor; bath raio 1: 10; be then warming up to 60 DEG C of dyeing temperatures with the speed of 1.5 DEG C/min; and be incubated 60min; then add soda ash solution 2ml (15g/L), be warming up to 75 DEG C of color fixing temperatures and be incubated 40min, fabric takes out; through washing, soap, washing, and dries.Add after cationic surfactant, discovery can drop to 33% by 79% by the dye-uptake of 20min, and final degree of fixation is basically identical.

Dye liquor prescription is as follows: reactive blue KE-GN (C.I. active blue 19 8) 1%, and cationic surfactant 0.05g/L, structure is as follows:

COTTON FABRIC, after embodiment 1-4 dyeing is processed, is tested as follows to it.

1) K/S value (the apparent colour degree of depth): in the upper mensuration of Datacolor-650 colour photometer (Datacolor company of the U.S.), result is as shown in table 1.

2) fastness of DYED FABRICS: according to GB/T3921-2008 and GB/T3920-2008 fastness to washing and the fastness to rubbing of test fabric respectively, as shown in table 2.

3) DYED FABRICS dyeing uniformity a: point of selective staining Shi Yang is as standard point, take up an official post and get 10 points at sample again, measure its value of chromatism (Δ E), (numerical value is less to calculate standard deviation Sr with formula (1), level-dyeing property is better), as shown in table 2.

$\mathrm{Sr}=\sqrt{\frac{1}{n}{\mathrm{\Σ}}_{t=1}^n{\mathrm{\ΔE}}_t^2}---\left(1\right)$

Table 1

As shown in Table 1, employing quaternary ammonium cation surfactant is the retarding agents under organic solvent/aqueous systems as REACTIVE DYES, and compared with not adding retarding agents, the apparent K/S value of DYED FABRICS declines (being more or less the same) to some extent, and it is better that dyeing uniformity is wanted; The K/S value that adopts the apparent K/S value of the fabric of organic solvent/aqueous systems dyeing to dye than conventional water-bath dyeing is high, and level-dyeing property is slightly poor.Washable and the colour fastness to rubbing of fabric is all 4 grades of left and right.As can be seen here, technical scheme energy providing cotton fabric provided by the present invention is good level-dyeing property under this dyeing system, and fastness to washing and fastness to rubbing are also better.

Table 2

Note: staining method 1 is conventional (aqueous solution dyeing, 60g/L) dyeing;

Staining method 2 is the dyeings without organic solvent/water dyeing system of retarding agents;

Staining method 3 is dyeings that in the present invention, cation retarder adds organic solvent/aqueous systems.

Claims (10)

1. a method that reduces REACTIVE DYES dicyandiamide solution dyeing rate, comprises the steps:

(1) adopt exhaust process to dye to COTTON FABRIC, in dye process, REACTIVE DYES is mixed with to the dye liquor that solvent is organic solvent/water, in dye liquor, add at least one cationic surface active agent, the pre-swelling COTTON FABRIC that is 60～100% by liquid carrying rate again drops in dye liquor, dye bath ratio is 1: 5～1: 20, heats up;

(2) add soda ash by the volume of water in dye liquor, then heat up, insulation fixation finish after by fabric washing, soap, wash, dry.

2. a kind of method that reduces REACTIVE DYES dicyandiamide solution dyeing rate as claimed in claim 1, is characterized in that: the organic solvent that step (1) is described and the volume ratio of water are 1: 1～9: 1.

3. a kind of method that reduces REACTIVE DYES dicyandiamide solution dyeing rate as claimed in claim 1, is characterized in that: the described organic solvent of step (1) is ethanol, propylene glycol monomethyl ether, normal propyl alcohol, isopropyl alcohol, acetone, the tert-butyl alcohol, acetonitrile, isobutanol or glycol dimethyl ether.

4. a kind of method that reduces REACTIVE DYES dicyandiamide solution dyeing rate as claimed in claim 1, is characterized in that: the concentration of the cationic surfactant described in step (1) in dye liquor is 0.01～5g/L; REACTIVE DYES concentration is 0.1～8%owf.

5. a kind of method that reduces REACTIVE DYES dicyandiamide solution dyeing rate as claimed in claim 1, is characterized in that: the described heating process of step (1) is for being warming up to 40～80 DEG C and be incubated 20～60min with the programming rate of 1～2 DEG C/min; The described heating process of step (2) is for being warming up to 40～100 DEG C and be incubated 30～60min with the programming rate of 1～2 DEG C/min.

6. a kind of method that reduces REACTIVE DYES dicyandiamide solution dyeing rate as claimed in claim 1, is characterized in that: the described REACTIVE DYES of step (1) is a chloro-s-triazine class REACTIVE DYES, dichloro s-triazine class REACTIVE DYES, vinyl sulfone(RemzaolHuo Xingranliaohuoxingjituan) class REACTIVE DYES, a two chloro-s-triazine class REACTIVE DYES or one chloro-s-triazine/vinyl sulfone double-active base class REACTIVE DYES.

7. a kind of method that reduces REACTIVE DYES dicyandiamide solution dyeing rate as claimed in claim 1, is characterized in that: the described cationic surfactant of step (1) is quaternary.

8. a kind of method that reduces REACTIVE DYES dicyandiamide solution dyeing rate as claimed in claim 7, is characterized in that: the length C of the hydrophobic carbochain of described cationic surfactant ₄～C ₁₈.

9. a kind of method that reduces REACTIVE DYES dicyandiamide solution dyeing rate as claimed in claim 7, is characterized in that: described quaternary is single (two) long chain alkyl ammonium salt, Gemini double type quaternary ammonium salt or heterocyclic quaternary ammonium salt.

10. a kind of method that reduces REACTIVE DYES dicyandiamide solution dyeing rate as claimed in claim 1, is characterized in that: the described soda ash addition of step (2) is 1～20g/L.