Reactive dye red suitable for dyeing composite cellulose fibers, and compounding method and application thereof

Abstract

The invention discloses reactive dye red suitable for dyeing composite cellulose fibers and a compounding method and application thereof, and the reactive dye red is prepared by mixing 50-80wt% of dye A, 20-50wt% of dye B and 0-50wt% of auxiliary C according to color matching of three primary colors. According to the invention, two kinds of fibers are different in color yield and have respective advantages (under the same dyeing condition, the dyeing degree of the dye A on tencel is 16% higher than that of the dye A on pure cotton; the dyeing degree of the dye B on tencel is 33% lower than that of the dye B on pure cotton, and the dyeing degree of the dye B on tencel is 33% lower than that of the dye B on pure cotton. After the cotton and tencel blended or interwoven fabric is subjected to one-bath dyeing treatment, the color difference in two directions of cotton and tencel is small, and the cloth cover saturation and fullness are better.

Description

Technical Field

[0001] The invention belongs to the field of dyes, and relates to a reactive dye red, in particular to a reactive dye red suitable for dyeing composite cellulose fibers, and a compounding method and application thereof. Background Art

[0002] With the continuous improvement of various textile processing technologies and people's demands for diversification, comfort and personalization of clothing, Tencel fabrics are becoming more and more popular due to their excellent performance and environmental protection. Cotton and Tencel composite fiber fabrics are being used more and more in clothing.

[0003] As people's requirements for clothing quality increase, the requirements for various fastness of fabrics are also increasing, and the requirements for color saturation and fullness are becoming more and more stringent. Some dyes used in the past can no longer meet current needs.

[0004] In cotton and Tencel blended or interwoven fabrics, the two fibers have different dye yields, resulting in different shades of color under the same dyeing conditions. After dyeing, this is directly reflected in poor saturation and fullness of the fabric surface, which seriously affects the fabric surface effect and fails to meet customer requirements.

[0005] Therefore, there is a need in the market for a reactive dye that can dye cotton and Tencel fabrics in two directions to meet customer needs. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention provides a reactive dye red suitable for dyeing composite cellulose fibers and a compounding method and application, which solves the problems of large color difference, poor saturation and fullness of the fabric surface after the existing dyes are used to dye cotton and Tencel in the same bath.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] The present invention provides a compounding method of a reactive dye red suitable for dyeing composite cellulose fibers, the compounding method comprising: mixing 50-80wt% of dye A, 20-50wt% of dye B and 0-50wt% of auxiliary agent C according to three primary colors; wherein the dye A comprises a compound of the following general formula:

[0009]

[0010] The general formula of the dye B is as follows:

[0011]

[0012] D1, D2, D3, and D4 are each independent

[0013] D5 is independently: p-phenylenediamine, m-phenylenediamine, benzidine disulfonic acid, DSD acid (81-11-8), M acid or hydroxyethylethylenediamine;

[0014] R1, R2, R3, R4, R5, and R6 are each independently -H, -SO3M9, -OCH3, -CH 3、 -SO2CH=CH2 or -SO2C2H4OSO3M 10 , M 1-10 Each is independently hydrogen, potassium, sodium, lithium or ammonium, and X is -Cl or -F.

[0015] As a preferred embodiment of the present invention, the structural formula of the dye A includes:

[0016] Formula (1-1):

[0017]

[0018]

[0019] As a preferred embodiment of the present invention, the structural formula of the dye B includes:

[0020]

[0021]

[0022]

[0023]

[0024]

[0025] As a preferred embodiment of the present invention, the auxiliary agent C is selected from one or a mixture of any two or more of sodium sulphate, sodium hexametaphosphate, methyl naphthalene sulfonic acid formaldehyde condensate and naphthalene sulfonic acid formaldehyde condensate.

[0026] As a preferred embodiment of the present invention, it also includes a reactive dye red obtained by compounding reactive red 198, reactive red 195 or reactive red 194.

[0027] As a preferred solution of the present invention, the reactive dye red is obtained by mixing 50-80% by weight of dye A and 20-50% by weight of dye B.

[0028] The invention also provides a reactive dye red prepared by the compounding method.

[0029] The present invention also provides the use of the above-mentioned reactive dye red suitable for dyeing composite cellulose fibers in one-bath dyeing of blended or interwoven fabrics of cotton and tencel.

[0030] As a preferred embodiment of the present invention, when dyeing in the same bath, the bath ratio is 1:4-10, the temperature is 60°C, and the time is 40-60 minutes.

[0031] The present invention selects at least two dyes with different color yields on two fibers and each having its own advantages (under the same dyeing conditions, the color uptake rate of reactive red BF on tencel is 16% higher than that on pure cotton; while the color uptake rate of reactive red 237 on tencel is 33% lower than that on pure cotton) for blending. The blending method comprises the following steps: first, determining the optimal dye ratio according to the dosage ratio of the two dyes that basically achieve similar dye uptake rates on the two fibers at various concentrations; and second, performing three-color blending using the three primary colors matched therewith, utilizing the principle that sensitive colors are easy to observe color differences, and slightly adjusting the dye ratio according to the color depth or color light difference of cotton and tencel, thereby obtaining a reactive dye red that can achieve similar color yields on composite cellulose fiber fabrics, cotton and tencel, under the same bath dyeing treatment conditions, at different dyeing depths and different fiber ratios.

[0032] Compared with the prior art, the advantages of the present invention are:

[0033] 1) According to the present invention, after the blended or interwoven fabric of cotton and Tencel is dyed in the same bath, the color difference between the cotton and Tencel in both directions is small, and the saturation and fullness of the fabric surface are good.

[0034] 2) The present invention can achieve a balance between the depth and color of the two fibers at all depths after the cotton and tencel blended or interwoven fabrics are dyed in the same bath.

[0035] 3) In the present invention, the obtained reactive red dye is used to dye the fabric through one-bath dyeing, and the dyeing operation is convenient. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, purpose and efficacy of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention. The experimental methods in the following embodiments, unless otherwise specified, are conventional methods, and the materials, reagents, etc. used in the following embodiments, unless otherwise specified, can all be obtained from commercial channels.

[0037] Example

[0038] Red dyes 1-15 were prepared according to the dye color matching ratio recorded in Table 1, cotton cloth was used as the standard sample cloth, and Tencel cloth was used as the comparison sample cloth, which were placed in a dye bath containing red dye at 40°C, run for 10 minutes, 5g of sodium sulfate was added, and run for 10 minutes; the temperature was increased to 60°C at a rate of 1°C / min, run for 10 minutes, 1.2g of sodium carbonate was added, and run for 45 minutes, and then washed with water, soaped, washed with water, and dried).

[0039] The dyed fabric was tested by DATCOLOR 850 to measure the color difference △E. Color difference value: indicates the difference in color, expressed as △E, generally used to evaluate the difference in color, widely used in plastics, printing, paints and inks, textiles and clothing, etc. (△E<0.25, very small or no color difference; 0.25<△E<0.5, very small color difference), the results are shown in Table 2.

[0040] Table 1. Dye color matching ratio

[0041]

[0042]

[0043] Table 2. Color measurement results

[0044]

[0045] The above is only a preferred embodiment of the present invention, and is not any formal or substantial limitation of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the method of the present invention, and these improvements and supplements should also be regarded as the protection scope of the present invention. Any technician familiar with this profession, without departing from the spirit and scope of the present invention, can make some changes, modifications and evolutions of the technical content disclosed above, which are equivalent embodiments of the present invention; at the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A compounding method for reactive dye red suitable for dyeing composite cellulose fibers, characterized in that: The compounding method comprises: mixing 50-80wt% of dye A, 20-50wt% of dye B and 0-50wt% of auxiliary agent C according to the three primary colors; wherein the dye A comprises a compound of the following general formula: The general formula of the dye B is as follows: D1, D2, D3, and D4 are each independent D5 is independently: p-phenylenediamine, m-phenylenediamine, benzidine disulfonic acid, DSD acid (81-11-8), M acid or hydroxyethylethylenediamine; R1, R2, R3, R4, R5, and R6 are each independently -H, -SO3M9, -OCH3, -CH 3、 -SO2CH=CH2 or -SO2C2H4OSO3M 10 , M 1-10 Each is independently hydrogen, potassium, sodium, lithium or ammonium, and X is -Cl or -F.

2. The method for compounding a reactive dye red suitable for dyeing composite cellulose fibers according to claim 1, characterized in that: The structural formula of the dye A includes: Formula (1-1): Formula (1-2): Formula (1-3): Formula (1-4): Formula (1-5): Formula (1-6):

3. The compounding method of a reactive dye red suitable for dyeing composite cellulose fibers according to claim 1, characterized in that: The structural formula of the dye B includes: Formula (2-1): Formula (2-2): Formula (2-3): Formula (2-4): Formula (2-5): Formula (2-6): Formula (2-7): Formula (2-8): Formula (2-9):

4. The compounding method of a reactive dye red suitable for dyeing composite cellulose fibers according to claim 1, characterized in that: The auxiliary agent C is selected from one of sodium sulfate, sodium hexametaphosphate, methyl naphthalene sulfonic acid formaldehyde condensate and naphthalene sulfonic acid formaldehyde condensate or a mixture of any two or more thereof.

5. The compounding method of a reactive dye red suitable for dyeing composite cellulose fibers according to claim 1, characterized in that: It also includes reactive dye red obtained by compounding reactive red 198, reactive red 195 or reactive red 194.

6. A compounding method for a reactive dye red suitable for dyeing composite cellulose fibers according to any one of claims 1 to 5, characterized in that: The reactive dye red is obtained by mixing 50-80% by weight of dye A and 20-50% by weight of dye B.

7. A reactive dye red suitable for dyeing composite cellulose fibers, characterized in that: Reactive dye red prepared by the compounding method according to any one of claims 1 to 6.

8. The use of the reactive dye red suitable for dyeing composite cellulose fibers as claimed in claim 7, characterized in that: The reactive dye red is used in one-bath dyeing of blended or interwoven fabrics of cotton and tencel.

9. The use of the reactive dye red suitable for dyeing composite cellulose fibers according to claim 8, characterized in that: When dyeing in the same bath, the bath ratio is 1:4-10, the temperature is 60℃, and the time is 40-60min.

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