A reactive blue dye suitable for dyeing of composite cellulose fibers and its compounding method and application

Abstract

The application discloses a reactive blue dye suitable for dyeing of composite cellulose fibers and a compounding method and application thereof, and belongs to the field of dyes. According to the three-primary-color color matching, 60-80wt% of dye A, 5-25wt% of dye B, 5-15wt% of dye C and 0-30wt% of additive D are mixed; the reactive blue dye obtained through the compounding method can solve the problems of large color difference, poor fabric saturation and poor fullness of cotton and Tencel blended or interwoven fabrics after the same-bath dyeing treatment of the existing dyes.

Description

Technical Field

[0001] This invention relates to the field of dyes, and more specifically, to a reactive blue dye suitable for dyeing composite cellulose fibers, a method for blending the dye, and its application. Background Technology

[0002] With the continuous advancement of textile processing technologies and the growing consumer demand for diversified, comfortable, and personalized clothing, Tencel fabric is gaining popularity due to its superior performance and environmentally friendly characteristics; cotton-Tencel composite fiber fabrics are increasingly used in clothing. As people's requirements for clothing quality rise, the standards for fabric fastness and color saturation and fullness are also becoming more stringent; some traditional dyes can no longer meet the dyeing needs of cotton-Tencel and other composite fiber fabrics.

[0003] In the dyeing process of cotton and Tencel blended or interwoven fabrics, due to the different dyeing rates of the two fibers, the color depth of the fabric will vary after dyeing under the same dyeing conditions. Furthermore, the dyed fabric also suffers from insufficient fabric saturation, insufficient fullness, and poor evenness, which seriously affects the fabric surface effect and makes it difficult for the dyed fabric to meet the customer's quality requirements.

[0004] Therefore, it is necessary to provide a method for compounding reactive blue dye suitable for dyeing composite cellulose fibers. The reactive blue dye obtained by this method can effectively solve the problems of large color difference, insufficient fabric saturation and poor fullness that occur when existing dyes are used to dye cotton and Tencel blended or interwoven fabrics in the same bath. Summary of the Invention

[0005] To address the problems existing in the prior art, the present invention aims to provide a reactive blue dye suitable for dyeing composite cellulose fibers, its compounding method, and its application. The reactive blue dye obtained by this compounding method can solve the problems of large color difference, insufficient saturation, and poor fullness of the fabric surface after dyeing cotton and Tencel blended or interwoven fabrics in the same bath with existing dyes.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A method for compounding reactive dye blue suitable for dyeing composite cellulose fibers, comprising mixing 60-80 wt% of dye A, 5-25 wt% of dye B, 5-15 wt% of dye C and 0-30 wt% of auxiliary agent D according to the three primary colors; The general formula of dye A is as follows:

[0008] The general formula of dye B is as follows:

[0009] The general formula of dye C is as follows:

[0010] Among them, D1, D2, D4, D5, D6, and D7 are each independent. or ; D3 can be: p-phenylenediamine, m-phenylenediamine, benzidine disulfonic acid, DSD acid, M acid, or hydroxyethyl ethylenediamine; R1, R2, R3, R4, R5, and R6 are each independently -H, -SO3M5, -OCH3, and -CH, respectively. 3、 -SO2CH=CH2 or -SO2C2H4OSO3M6; M 1-12 Each can be hydrogen, potassium, sodium, lithium, or ammonium; X is -Cl or -F.

[0011] Furthermore, the dye A is one or a mixture of two or more of the following structural formulas: Equation (1-1):

[0012] Equation (1-2):

[0013] Equation (1-3):

[0014] Equation (1-4):

[0015] Equation (1-5):

[0016] Equation (1-6):

[0017] Equation (1-7):

[0018] The dye B is one or a mixture of two or more of the following structural formulas: Equation (2-1):

[0019] Equation (2-2):

[0020] Equation (2-3):

[0021] Equation (2-4):

[0022] The dye C is one or a mixture of two or more of the following structural formulas: Equation (3-1):

[0023] Equation (3-2):

[0024] Equation (3-3):

[0025] Equation (3-4):

[0026] Equation (3-5):

[0027] Equation (3-6):

[0028] Equation (3-7):

[0029] Equation (3-8):

[0030]

[0031] Furthermore, the auxiliary agent D is one or a mixture of any two or more of the following: sodium sulfate, sodium hexametaphosphate, methylnaphthalenesulfonic acid formaldehyde condensate, and naphthalenesulfonic acid formaldehyde condensate.

[0032] Furthermore, the blending method includes: Method 1 is to obtain the optimal dye ratio by combining the concentration ratios of dyes A, B, and C used when the colors of the two fibers are closest after dyeing cotton and Tencel at different concentrations; Method 2 is to use the principle of easy observation of sensitive colors to perform three-color blending with the matching three primary colors, and to slightly adjust the dye ratios according to the color results of cotton and Tencel to obtain the optimal dye ratio.

[0033] Furthermore, dye A is reactive blue BF, which is a monochromatic structure; the structural formula of reactive blue BF is shown in formula (1-1): Equation (1-1):

[0034] Reactive navy blue RC-R is obtained by blending dye B and dye C; dye B is one of the following structural formulas: Equation (2-1):

[0035] Equation (2-2):

[0036] The structural formula of dye C is shown in formula (3-1): Equation (3-1):

[0037] Furthermore, the reactive dye blue is obtained by blending 60-80% by weight of reactive blue BF and 10-30% by weight of reactive navy blue RC-R, with the remainder being auxiliary agent D.

[0038] The present invention also provides a reactive blue dye suitable for dyeing composite cellulose fibers.

[0039] The present invention also provides an application of a reactive blue dye suitable for dyeing composite cellulose fibers, wherein the reactive blue dye is applied to the same bath dyeing of cotton and Tencel blended or interwoven fabrics.

[0040] Furthermore, the bath ratio for the same-bath staining is 1:10, the staining temperature is 60°C, and the staining time is 40~90 min.

[0041] The details are as follows: A method for compounding reactive dye blue suitable for dyeing composite cellulose fibers, comprising mixing 60-80 wt% dye A, 5-25 wt% dye B, 5-15 wt% dye C and 0-30 wt% auxiliary agent D according to the three primary colors; The general formula of dye A is as follows: Equation (1):

[0042] The general formula of dye B is as follows: Equation (2)

[0043] The general formula of dye C is as follows: Equation (3):

[0044] Among them, D1, D2, D4, D5, D6, and D7 are each independent. or ; D3 is independently: p-phenylenediamine, m-phenylenediamine, benzidine disulfonic acid, DSD acid, M acid, or hydroxyethyl ethylenediamine; R1, R2, R3, R4, R5, and R6 are each independently -H, -SO3M5, -OCH3, -CH3, -SO2CH=CH2, or -SO2C2H4OSO3M6; M 1-12 Each can be hydrogen, potassium, sodium, lithium, or ammonium; X is -Cl or -F.

[0045] Furthermore, the preferred structure of dye A (1) is as follows, and the following structure is only a preferred embodiment of the present invention: Equation (1-1):

[0046] Equation (1-2):

[0047] Equation (1-3):

[0048] Equation (1-4):

[0049] Equation (1-5):

[0050] Equation (1-6):

[0051] Equation (1-7):

[0052] The preferred structure of dye B (2) is as follows, and the following structure is only a preferred embodiment of the present invention: Equation (2-1):

[0053] Equation (2-2):

[0054] Equation (2-3):

[0055] Equation (2-4):

[0056] The preferred structure of dye C (3) is as follows, and the following structure is only a preferred embodiment of the present invention:

[0057] Equation (3-2):

[0058] Equation (3-3):

[0059] Equation (3-4):

[0060] Equation (3-5):

[0061] Equation (3-6):

[0062] Equation (3-7):

[0063] Equation (3-8):

[0064] Furthermore, the auxiliary agent D in the reactive dye is one or a mixture of any two or more of the following: sodium sulfate, sodium hexametaphosphate, methylnaphthalenesulfonic acid formaldehyde condensate, and naphthalenesulfonic acid formaldehyde condensate.

[0065] The present invention also provides a reactive blue dye suitable for dyeing composite cellulose fibers, which is obtained by mixing reactive blue BF and reactive navy blue RC-R according to the three primary colors.

[0066] Furthermore, the compounding method involves selecting at least two dyes with different color yields on the two fibers, each possessing its own advantages, and blending them. There are two blending methods: Method 1: Based on the dyeing rates of Reactive Blue BF and Reactive Navy Blue RC-R on the two fibers at various concentrations, the optimal dye ratio is determined by finding a proportion that achieves near-identical color yields for both cotton and Tencel. Method 2: Using the three primary colors compatible with Reactive Navy Blue RC-R, a three-color blend is performed. Then, utilizing the principle that sensitive colors easily observe color differences, the dye ratio is slightly adjusted based on the color depth or hue differences between the dyed cotton and Tencel. This results in a reactive blue dye that can achieve near-identical color yields for both cotton and Tencel in composite cellulose fiber fabrics under the same dyeing bath, different dyeing depths, and different fiber ratios.

[0067] The present invention also provides an application of a reactive blue dye suitable for dyeing composite cellulose fibers. This reactive blue dye is suitable for dyeing composite cellulose fibers at different dyeing depths and different fiber ratios under the same bath dyeing treatment.

[0068] Furthermore, the bath ratio for staining is 1:10, the staining temperature is 60°C, and the staining time is 40~90 min.

[0069] Compared with the prior art, the advantages of this invention are: I. The reactive blue dye obtained by the compounding method of reactive blue dye in this invention can achieve small color difference in the cotton and Tencel directions, high fabric saturation and good fullness in cotton and Tencel blended or interwoven fabrics after dyeing in the same bath.

[0070] II. The reactive blue dye provided by this invention enables cotton and Tencel blended or interwoven fabrics to achieve a balance in dyeing depth and color after being dyed in the same bath at various dyeing depths.

[0071] Third, the reactive blue dye provided by this invention can be used to dye cotton and Tencel blended or interwoven fabrics directly through same-bath dyeing, making the dyeing operation convenient. Detailed Implementation

[0072] Example 1:

[0073] Prepare the reactive blue dye according to the formula ratio recorded in Table 1. Then, place the cotton fabric and Tencel fabric simultaneously in a dye bath at 40°C containing the reactive blue dye prepared in Table 1 and run for 10 minutes. Add 7g of sodium sulfate and run for another 10 minutes. Increase the temperature to 60°C at a rate of 1°C / min and run for 10 minutes. Then add 2g of sodium carbonate and run for 45 minutes. Then wash with water, soap, wash with water, and dry.

[0074] The dyed fabrics were tested using a DATCOLOR 850. The dyeing results were obtained using cotton as the standard sample and Tencel as the comparison sample. The color difference (DE < 0.25, very small or no color difference; 0.25 < DE < 0.5, slight color difference), brightness difference, saturation difference, hue difference, red-green difference, and yellow-blue difference of the Tencel fabrics were tested. The test results are shown in Table 2.

[0075] Table 1. Dye Mixing Ratios

[0076] Table 2 Colorimetric results of dyed fabrics

[0077] As shown in Tables 1 and 2, after co-bath dyeing of cotton and Tencel with the reactive blue dye provided by this invention, the color difference between the two fabrics is extremely small. Furthermore, the differences in color parameters such as lightness, brilliance, hue, red-green difference, and yellow-blue difference between the dyed cotton and Tencel are also very small. These results indicate that the colors of the dyed cotton and Tencel are very similar, effectively avoiding the problem of uneven dyeing that may occur in blended or interwoven fabrics of cotton and Tencel after dyeing.

[0078] Example 2:

[0079] 5g cotton fabric and 5g Tencel fabric, dyeing depth 0.5%, liquor ratio 1:10, sodium sulfate 40g / L, sodium carbonate 10g / L; specific operation is as follows: Take 5g of cotton fabric and 5g of Tencel fabric as fabric samples, place them in a 100ml dye bath containing 0.005g of blue dye 1 from Example 1 at 40℃, run for 10 minutes, add 4g of sodium sulfate, run for 10 minutes; raise the temperature to 60℃ at a rate of 1℃ / min, run for 10 minutes, add 1g of sodium carbonate, run for 45 minutes, then wash with water, soap, wash with water, and dry.

[0080] The dyed fabric was tested with a DATCOLOR 850. The results showed that the color difference of the Tencel fabric was DE=0.21, with cotton as the standard.

[0081] Example 3:

[0082] 5g cotton fabric and 5g Tencel fabric, dyeing depth 1.0%, liquor ratio 1:10, sodium sulfate 50g / L, sodium carbonate 12g / L, temperature 60℃; specific operation is as follows: Take 5g of cotton fabric and 5g of Tencel fabric as fabric samples, place them in a 100ml dye bath containing 0.005g of blue dye 1 from Example 1 at 40℃, run for 10 minutes, add 4g of sodium sulfate, run for 10 minutes; raise the temperature to 60℃ at a rate of 1℃ / min, run for 10 minutes, add 1g of sodium carbonate, run for 45 minutes, then wash with water, soap, wash with water, and dry.

[0083] The dyed fabric was tested with a DATCOLOR 850. The results showed that the color difference of the Tencel fabric was DE=0.21, with cotton as the standard.

[0084] Example 4:

[0085] 5g cotton fabric and 5g Tencel fabric, dyeing depth 2.0%, liquor ratio 1:10, sodium sulfate 60g / L, sodium carbonate 15g / L, temperature 60℃; specific operation is as follows: Take 5g of cotton fabric and 5g of Tencel fabric as fabric samples, place them in a 100ml dye bath containing 0.02g of blue dye 1 from Example 1 at 40℃, run for 10 minutes, add 6g of sodium sulfate, run for 10 minutes; raise the temperature to 60℃ at a rate of 1℃ / min, run for 10 minutes, add 1.5g of sodium carbonate, run for 45 minutes, then wash with water, soap, wash with water, and dry.

[0086] The dyed fabric was tested with a DATCOLOR 850. The results showed that the color difference of the Tencel fabric was DE=0.28, with cotton as the standard.

[0087] Example 5:

[0088] 5g cotton fabric and 5g Tencel fabric, dyeing depth 4.0%, liquor ratio 1:10, sodium sulfate 60g / L, sodium carbonate 15g / L, temperature 60℃; specific operation is as follows: Take 5g of cotton fabric and 5g of Tencel fabric as fabric samples, place them in a 100ml dye bath containing 0.04g of blue dye 1 from Example 1 at 40℃, run for 10 minutes, add 7g of sodium sulfate, run for 10 minutes; raise the temperature to 60℃ at a rate of 1℃ / min, run for 10 minutes, add 2g of sodium carbonate, run for 45 minutes, then wash with water, soap, wash with water, and dry.

[0089] The dyed fabric was tested with a DATCOLOR 850. The results showed that the color difference of the Tencel fabric was DE=0.09, with cotton as the standard.

[0090] As can be seen from Examples 2-5, the color difference value of Tencel fabric prepared by the present invention is less than 0.28 at different dyeing depths. This indicates that after dyeing cotton and Tencel blended or interwoven fabrics with this reactive blue dye, the dye can achieve a balance between the dyeing depth and color of the two fibers at various depths.

[0091] Example 6:

[0092] 2g cotton fabric and 8g Tencel fabric, dyeing depth 1.0%, liquor ratio 1:10, sodium sulfate 60g / L, sodium carbonate 15g / L, temperature 60℃; specific operation is as follows: Take 2g of cotton fabric and 8g of Tencel fabric as fabric samples, place them in a 100ml dye bath containing 0.04g of blue dye 1 from Example 1 at 40℃, run for 10 minutes, add 7g of sodium sulfate, run for 10 minutes; raise the temperature to 60℃ at a rate of 1℃ / min, run for 10 minutes, add 2g of sodium carbonate, run for 45 minutes, then wash with water, soap, wash with water, and dry.

[0093] The dyed fabric was tested with a DATCOLOR 850. The results showed that the color difference of the Tencel fabric was DE=0.23, with cotton as the standard.

[0094] Example 7:

[0095] 8g cotton fabric and 2g Tencel fabric, dyeing depth 1.0%, liquor ratio 1:10, sodium sulfate 60g / L, sodium carbonate 15g / L, temperature 60℃; specific operation is as follows: Take 8g of cotton fabric and 2g of Tencel fabric as fabric samples, place them in a 100ml dye bath containing 0.04g of blue dye 1 from Example 1 at 40℃, run for 10 minutes, add 7g of sodium sulfate, run for 10 minutes; raise the temperature to 60℃ at a rate of 1℃ / min, run for 10 minutes, add 2g of sodium carbonate, run for 45 minutes, then wash with water, soap, wash with water, and dry.

[0096] The dyed fabric was tested with a DATCOLOR 850. The results showed that the color difference of the Tencel fabric was DE=0.20, with cotton as the standard.

[0097] Example 8:

[0098] 2g cotton fabric and 8g Tencel fabric, dyeing depth 3.0%, liquor ratio 1:10, sodium sulfate 60g / L, sodium carbonate 15g / L, temperature 60℃; specific operation is as follows: Take 2g of cotton fabric and 8g of Tencel fabric as fabric samples, place them in a 100ml dye bath containing 0.04g of blue dye 1 from Example 1 at 40℃, run for 10 minutes, add 7g of sodium sulfate, run for 10 minutes; raise the temperature to 60℃ at a rate of 1℃ / min, run for 10 minutes, add 2g of sodium carbonate, run for 45 minutes, then wash with water, soap, wash with water, and dry.

[0099] The dyed fabric was tested with a DATCOLOR 850. The results showed that the color difference of the Tencel fabric was DE=0.17, with cotton as the standard.

[0100] Example 9:

[0101] 8g cotton fabric and 2g Tencel fabric, dyeing depth 3.0%, liquor ratio 1:10, sodium sulfate 60g / L, sodium carbonate 15g / L, temperature 60℃; specific operation is as follows: Take 8g of cotton fabric and 2g of Tencel fabric as fabric samples, place them in a 100ml dye bath containing 0.04g of blue dye 1 from Example 1 at 40℃, run for 10 minutes, add 7g of sodium sulfate, run for 10 minutes; raise the temperature to 60℃ at a rate of 1℃ / min, run for 10 minutes, add 2g of sodium carbonate, run for 45 minutes, then wash with water, soap, wash with water, and dry.

[0102] The dyed fabric was tested for color using a DATCOLOR 850. The results showed that the color difference for Tencel fabric was DE=0.22, with cotton fabric as the standard.

[0103] Data from Examples 6 and 7, and Examples 8 and 9 show that, with other conditions unchanged, changing the ratio of cotton to Tencel fabric in the fabric sample results in a Tencel fabric color difference of <0.25, and the color difference between Tencel and cotton fabric is minimal or nonexistent. These data indicate that changing the ratio of cotton to Tencel fabric in the fabric sample does not increase the Tencel fabric color difference.

Claims

1. A method for compounding reactive blue dyes suitable for dyeing composite cellulose fibers, characterized in that, Based on the three primary colors, 60-80 wt% of dye A, 5-25 wt% of dye B, 5-15 wt% of dye C and 0-30 wt% of auxiliary agent D are mixed together. The general formula of dye A is as follows: ; The general formula of dye B is as follows: ； The general formula of dye C is as follows: ； Among them, D1, D2, D4, D5, D6, and D7 are each independent. or ; D3 can be: p-phenylenediamine, m-phenylenediamine, benzidine disulfonic acid, DSD acid, M acid, or hydroxyethyl ethylenediamine; R1, R2, R3, R4, R5, and R6 are each independently -H, -SO3M5, -OCH3, -CH3, -SO2CH=CH2, or -SO2C2H4OSO3M6; M 1-12 Each can be hydrogen, potassium, sodium, lithium, or ammonium; X is -Cl or -F.

2. The method for compounding reactive blue dyes suitable for dyeing composite cellulose fibers according to claim 1, characterized in that: The dye A is one or a mixture of two or more of the following structural formulas: Equation (1-1): ; Equation (1-2): ； Equation (1-3): ； Equation (1-4): ； Equation (1-5): ； Equation (1-6): ； Equation (1-7): ; The dye B is one or a mixture of two or more of the following structural formulas: Equation (2-1): ; Equation (2-2): ; Equation (2-3): ; Equation (2-4): ; The dye C is one or a mixture of two or more of the following structural formulas: Equation (3-1): ; Equation (3-2): ; Equation (3-3): ; Equation (3-4): ; Equation (3-5): ; Equation (3-6): ; Equation (3-7): ; Equation (3-8): .

3. The method for compounding reactive blue dyes suitable for dyeing composite cellulose fibers according to claim 1, characterized in that: The auxiliary agent D is one or a mixture of any two or more of the following: sodium sulfate, sodium hexametaphosphate, methylnaphthalenesulfonic acid formaldehyde condensate, and naphthalenesulfonic acid formaldehyde condensate.

4. The method for compounding reactive blue dyes suitable for dyeing composite cellulose fibers according to claim 1, characterized in that: Dye A is reactive blue BF, which is a monochromatic structure; the structural formula of reactive blue BF is shown in formula (1-1): Equation (1-1): ; Reactive navy blue RC-R is obtained by blending dye B and dye C; dye B is one of the following structural formulas: Equation (2-1): ； Equation (2-2): ； The structural formula of dye C is shown in formula (3-1): Equation (3-1): 。 5. The method for compounding reactive blue dyes suitable for dyeing composite cellulose fibers according to claim 4, characterized in that: The reactive dye blue is obtained by blending 60-80% by weight of reactive blue BF and 10-30% by weight of reactive navy blue RC-R, with the remainder being auxiliary agent D.

6. A reactive blue dye suitable for dyeing composite cellulose fibers, characterized in that: It is prepared by the compounding method of a reactive dye blue suitable for dyeing composite cellulose fibers as described in any one of claims 1-5.

7. The application of the reactive blue dye suitable for dyeing composite cellulose fibers according to claim 6, characterized in that: The reactive blue dye is used in the same bath dyeing of cotton and Tencel blended or interwoven fabrics.

8. The application of the reactive blue dye suitable for dyeing composite cellulose fibers according to claim 7, characterized in that: The bath ratio for staining is 1:10, the staining temperature is 60°C, and the staining time is 40~90 min.

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