KR100477470B1 - Preparation of acetate fabrics for acid-dyeing - Google Patents

Abstract

The present invention is characterized in that the cellulose diacetate fiber is reduced by 5 to 10% of an alkali weight loss rate to cellulose the surface, and then treated under 5 to 10% of a cationic agent having an amino group in a molecule so as to have chlorine resistance to acid dyes. The present invention relates to a method for producing an acid dye saltable acetate fiber, and to remove some acetyl groups of a cellulose diacetate fiber and to produce a acetate fiber that can be dyed in an acid dye by a cationic reaction in which the resulting hydroxy group is substituted with an amine group. It is about.

Description

Preparation method of acid dye chlorinated acetate fiber {Preparation of acetate fabrics for acid-dyeing}

The present invention provides a method for producing an acetate fiber that can be dyed in an acid dye through a cationic reaction in which a hydroxy group is generated by rayonating the surface of the cellulose acetate fiber with an alkali, thereby substituting an amine group.

Existing cation treatment method is used to increase the dyeing resistance to reactive dyes, direct dyes, acid dyes and the like containing anionic groups through the cationization reaction to cellulose fibers, or to enable dyeing with pigments. In addition, a method of cationizing cellulose fibers has been used to prepare durable antimicrobial fibers, and research is being conducted. In the case of cellulose acetate fibers, compared to the same cellulose rayon, cotton, etc., the hydroxy group is relatively less reactive, and also has a problem in causing a uniform reaction due to poor durability against alkali, which is used as a catalyst for cationization. In addition, cellulose acetate fibers are being used for clothing due to their unique touch and gloss, but they are used together with polyester or nylon rather than being used alone. In this case, they can be dyed only by disperse dyes. It is impossible to dye, and when dyed with nylon, the dyeing process is complicated, the color fastness has a problem.

Accordingly, the present invention provides a hydroxy group on the cellulose acetate fiber by uniformly saponifying the surface of the cellulose acetate fiber through a high alkali saponification technique without the problems of the prior art as described above, and cationization to replace the resulting hydroxy group with an amine group. It is a technical object of the present invention to provide a method for producing a cellulose acetate fiber which can be dyed in an acid dye through a reaction.

Therefore, according to the present invention, the cellulose diacetate fiber having a degree of substitution of 2.0 to 2.75 (45 to 59.5% of superoxide) is reduced by 5 to 10% of an alkali reduction ratio, and the surface is celluloseated. There is provided a process for producing an acid dye chlorinated acetate fiber, characterized in that it is treated under% to make it soluble in acid dyes.

Hereinafter, the present invention will be described in more detail.

In the present invention, after preparing a woven fabric of cellulose diacetate, 5 to 10 wt% of aqueous solution of alkali compared to cellulose diacetate fiber was treated for 1 to 120 minutes at 70 to 130 ° C to saponify the acetyl group on the surface of the cellulose acetate fiber with a hydroxyl group. 30 to 60 ° C of cellulose acetate fibers obtained by using polyaminoamide-based resin having an acryl group and an amide group in a molecule at a concentration of 5 to 10 wt% compared to diacetate fibers and adding 2 to 3 g / L of an alkali catalyst thereto. The cationized cellulose acetate fiber can be manufactured by carrying out the cationization which reacts for 30 to 60 minutes.

Alkali reduction rate of the cellulose diacetate fiber of the present invention is 5 to 10%, preferably 7 to 8%. If the reduction rate is 5% or less, the cationic reaction does not occur sufficiently, so that the dyeability to the acid dye is lowered, and at 10% or more, a heterogeneous cationic reaction occurs. In addition, the temperature of the cationization reaction is less than 30 ℃ reactivity, the temperature exceeds 60 ℃ reactivity of the alkali catalyst of the cellulose acetate is increased, the reaction proceeds rather unevenly.

Examples of alkali compounds that can be used in the present invention include alkali metal hydroxides such as sodium hydroxide, alkaline earth metal hydroxides such as calcium hydroxide, alkali metal carbonates such as sodium carbonate and the like. As a cationization reagent, an amine group may be introduced using 2-aminoethylsulfuric acid, ethylene imine, tosyl chloride, or polyaminoamide resin. Any one of the above cationic reaction agents may be selected and reacted by using a 3-chloro-2-hydroxy propyl trimethyl ammonium chloride to substitute a quaternary ammonium group. . Commonly used polyaminoamide resins include Snowgen CAT-850 (SNOGEN CAT-850: Daeyoung Chemical).

 Features and other advantages of the present invention as described above will become more apparent from the following examples. However, the present invention is not limited to the following examples.

Example 1

 Liquid dyeing machine after scouring and drying plain fabrics (inclined 75d / 20f, weft 120d / 33f, stomach density 75 / inch, SK chemical acid, Korea) composed of cellulose diacetate fibers with acetyl substitution degree 2.55 (56.9% superoxide) To the water was added 5% caustic soda compared to the acetate fiber. The fibers were placed in a liquid dyeing machine, and then heated at 30 ° C. to 2 ° C./min, treated at 98 ° C. for 30 minutes, cooled to 30 ° C. at 2 ° C./min, and drained to obtain an acetate fiber having a weight loss of 5.2%. In addition, 10% of Daegen Chemical's Snowgen CAT-850, a cationic agent, was added to the dyeing machine, and 2g / L of caustic soda was added as a catalyst, followed by reaction at 60 ° C for 60 minutes, followed by cationization. After draining. This process yielded cationized acetate fibers after 5% of the acetate fibers were lost. Further, the obtained fibers were dyed at 100 ° C. using 0.5% of Kayacyl Blue HBL, which is a homogeneous acid dye, and then washed with water using a conventional method and then measured.

* Reduction rate: The weight change of the sample before and after alkali treatment was measured and obtained by the following equation.

* Dyeing property: C.I. After dyeing blue acid dye (Acid Blue 182, Kayacyl Blue HBL) at a concentration of 0.5% owf for 30 minutes at 100 ° C, dyeing is performed by soaping and rinsing at 70 ° C by the conventional method. Completed. Measure the reflectance (R: Reflectance) using the spectrophotometer (Color-Eye 7000A, Megbed Co., USA), and substitute this in K / S = (1-R) 2 / 2R. The value was obtained and the dyeability was evaluated using this value.

Example 2

 The same procedure as in Example 1 was repeated except that 8% caustic soda solution was used in the liquid dyeing machine.

Example 3

The same procedure as in Example 1 was repeated except that 10% caustic soda solution was used in the liquid dyeing machine.

Comparative Example 1

Liquid dyeing machine after scouring and drying plain fabrics (incline 75d / 20f, weft 120d / 33f, gas density 75 bones / inch, SK chemical acid, Korea) composed of cellulose diacetate fibers with acetyl substitution degree 2.55 (56.9% superoxide) 10% of Daeyoung Chemical's Snortex CAT-850 is added to the acetate fiber, and 2g / L of caustic soda is added as a catalyst to react at 60 ° C for 60 minutes, followed by cationization and washing with water at room temperature. It was. The obtained fiber was dyed at 100 ° C. using 0.5% of Kayacyl Blue HBR, which is a homogeneous acid dye, and washed with water using a conventional method before coloration.

No. Example 1 Example 2 Example 3 Comparative Example 1 Reduction rate (%) 5.2 8.3 10.1 0 K / S 10.14 12.20 11.54 0.94

Alkali weight loss and acid dye dyeability of Examples and Comparative Examples

 Since the acetate fiber prepared by the above method has good salting resistance to acid dyes by cationization, it is possible to produce various shades of salts by preparing a composite with fibers such as polyester and nylon. It is possible to dye copper bath by acid dye, so its use is large industrially.

Claims (2)

Cellulose cellulose diacetate fiber having a degree of substitution of 2.0-2.75 (45-59.5% superoxide) was reduced by 5-10% of alkali reduction rate to cellulose the surface, and then treated under 5-10% of a cationic agent having an amino group in the molecule A method for producing an acid dye salt chloride acetate fiber characterized in that it has a salt to the dye. The method according to claim 1, wherein the cationization reagent used in the cationization treatment is 2-aminoethyl sulfuric acid, ethylene imine, tosyl chloride, polyaminoamide. (aminoamide)]-based resin, 3-chloro-2-hydroxy propylene trimethyl ammonium chloride (3-chloro-2-hydroxy propyl trimethyl ammonium chloride) is selected from any one of the acid dye salt chlorine acetate characterized in that the cation Method of making fibers.