SU1335597A1 - Method of coloring cotton fabric - Google Patents

Abstract

The invention relates to dyeing and finishing production, in particular, to a method of dyeing cotton fabric by synthesizing pigment on a fiber. The proposed method allows to increase the color fastness of paint from 5-7 points to 7 and to simplify the technology by eliminating the need for strict control of the pH of the medium and carrying out the process at pH 4-8 due to the fact that during the synthesis of the pigment 1,2- -diaminobenzimidazole, and as a dicarbonyl-containing compound - N-methylisatin, c (L with co with ai SP; about 1

Description

The invention relates to dyeing and finishing production, in particular to a method of dyeing cotton fabric by synthesizing pigment on a fiber.

The purpose of the invention is to improve the lightfastness of the color and simplify the technology.

Example 1. A sample of cotton paper with a mass of 1.0 g is impregnated on a two-shaft padding (pressed with 95%) with a solution of the composition, g / kg:

1,2-Diaminobenzimidazole 18

N-methylisatin 15

Cellosolve 100

Water Up to 1000

After impregnation, the sample is thermofixed at 170 ° C.

5 minutes and then washed with cold water (20 ° C) for 5 minutes, hot water (80 ° C) for 5 minutes and cold water (20 ° C) for 3 minutes. An orange color is obtained. Lightfastness coloring 7 points, the output of the pigment 20 g / c fiber.

Example 2. A sample of fabric from cotton yolk weighing 1.0 g is impregnated on a two-shaft plug (pressed with 95%) with a solution of the composition, g / kg:

1,2-Diaminobenzimidazol20

N-Methilisat in17

Cellosolve100

Water Up to 1000

Further, all operations are similar to example 1. Get the color orange. Lightfastness coloring 7 points ,, pigment yield 26 g / kg fiber.

Example .3. A sample of cotton fiber fabric is printed on a laboratory printing machine with a mesh pattern and a magnetic squeegee pressing with ink of the composition, g / kg:

1,2-Diaminobenzimidazol24

N-methylisatin20

Cellosolve100

Starch thickener 12% on 650 Waters up to 1000

The printed sample is dried at 100 ° C for 5 minutes. Further, all operations are similar to example 1. Get the color orange. Lightfastness

five

0

bone color 7 points, the output of the pigment 28 g / kg of fiber.

Example 4. A sample of fabric from cotton fiber weighing 1.0 g is impregnated on a two-shaft padding (squeezing 95%) with acetate buffer solution with a pH of 4.06 composition, g / kg: 1,2-Diaminobenzimidazol20

N-methylisatin17

Cellosolve100

Buffer solution with a pH of 4.06 To 1000 Next, all operations are similar to example 1. Get the color orange. Lightfastness coloring 7 points, vspod pigment 28 g / kg fiber.

Example 5. A tissue sample of cotton fiber weighing 1.0 g is impregnated on a two-shaft padding (squeezing 95%) with phosphate buffer solution with a pH of 7.75 composition, g / kg: 1,2-Diaminobenzimidazole

N-methylisatin17

Cellosolve100

Buffer solution with pH 7.75 to 1000

Further, all operations are similar to example 1. Get-coloring orange. Lightfastness coloring 7 points, the output of pigment 28 g / kg of fiber. Example 6. A sample of fabric made of cotton fiber weighing 1.0 g is impregnated on a two-shaft padding (squeezing 95%) with a solution of composition, va, g / kg:

1,2-Diaminobenzimidazol13

N-Methylisatin10

Cellosolve100

Water Up to 1000

Further, all operations are similar to Example 1. An orange color is obtained. Lightfastness coloring 7 points, vspod pigment 14 g / kg of fiber.

five

0

five

0

The orange color is characterized by an absorption maximum at 1,395 times and an Igg absorption intensity of 4.00.

Claims (1)

Invention Formula The method of coloring cotton fabric by applying on it a water composition based on o-diamine and dicarbonyl-containing compound 31335597 1,2-diaminobenzimidazole is colored with a subsequent heat setting; 24 g and 15-20 g per 1 kg of the composition, as o-diamine, is used.