JPH0418070B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a dyeing aid for polyester fibers. [Prior art] Traditionally, polyester fibers have been dyed using disperse dyes with uniform dyeing legs and higher fatty acid ester type nonionic surfactants, or these and anions such as alkyl ether sulfates and aryl ether sulfates as dyeing aids. A method was used in which a mixture of surfactants was added to the dye bath and level dyeing was carried out under high temperature and pressure. In recent years, in order to further streamline polyester fiber dyeing, efforts have been made to reduce dyeing costs by shortening heating time and using economical dyes (using azo disperse dyes), or by using high fastness dyes to obtain high quality dyeing ( There is a strong demand for products using azo disperse dyes. All of these are too harsh dyeing conditions for level dyeing, and dyeing recipes aimed at economical dye use, such as combinations of azo dyes and anthraquinone dyes with different dyeing depths, are particularly difficult. However, it was extremely difficult to dye evenly. Currently, efforts are being made to solve these problems by lowering the heating rate and increasing the amount of dyeing aids used, but this has not yet completely resolved uneven dyeing. This often results in poor dyeing. [Problems to be Solved by the Invention] The present inventors have solved the problem even when dyeing polyester fibers using two or more types of dyes with different dyeing depths.
As a result of intensive studies to obtain a dyeing aid that can dye at a rate higher than the standard heating rate and shorten the dyeing time, the present invention was arrived at. [Means for solving the problems] The present invention uses an oxyalkylene ether of a trihydric to octahydric alcohol containing 30 to 80% by weight of oxyethylene groups in the molecule, a dicarboxylic acid, and an aliphatic monocarboxylic acid. (A) and, if necessary, (B) an aliphatic monocarboxylic acid ester of an oxyalkylene ether of a polyhydric alcohol and/or an anionic surfactant (C). It is a dyeing aid. Dicarboxylic acids forming the mixed ester (A) include dicarboxylic acids having 2 to 18 carbon atoms, such as aliphatic dicarboxylic acids [succinic acid, adipic acid, azelaic acid, sebacic acid, dodecane dibasic acid, hexadecane dibasic acid, eicosane Dibasic acid, 7-ethyltetradecane dibasic acid 7-Ethyl octadecane dibasic acid ]; Aliphatic unsaturated dicarboxylic acids (fumaric acid, maleic acid, unsaturated long chain dibasic acids such as HOOC(CH ₂ ) ₆ CH=CH(CH ₂ ) ₆ COOH,

〔Example〕

The present invention will be further explained below with reference to Examples.
The present invention is not limited to this. The dyeing aids of the present invention and comparative products of Examples 1 to 9 and Comparative Examples 1 to 4 are shown in Table 1.

[Table] Example 10 The dyeing aids of Examples 1 to 9 and the compounds of Comparative Examples 1 to 4 were subjected to (a) level dyeing test, (b) dispersibility test, and (c) foaming test, The results are shown in Tables 2 and 3.

【table】

〔Test method〕

(B) Level dyeing test Polyester taffeta was dyed under the following dyeing conditions, and the L, a, and b values of the left and right sides of the dyed cloth were measured to calculate the color difference (ΔE). A small value of ΔE indicates level dyeing. Dye Holon Brilliant Blue SR Gran
200% 0.3% o.w.f. [Sandoz Chemical Co., Ltd.]
Made by Paranil Yellow 3G 0.5%owf
[Manufactured by B.A.S.F.] Dye Sumikalon Yellow SE-3GL Conch
0.25% o・w・f・ Sumikaron Brilliant Red SE−
BL 0.5%o・w・f・ Sumikaron Blue SE−RF 0.5%o・
w・f・[Sumitomo Chemical Co., Ltd.] Dye Holon Yellow Brown S-2RL 0.088
%o・w・f・ Holon Bronrubin 2GFL 0.011%o・
w・f・ Holon Navy 2GLN 0.139% o・w・
f. [Manufactured by Sandoz Kagaku Co., Ltd.] Dye Dianics Brilliant Yellow
5GE 0.2%o・w・f・dianics Red BN-SE 0.25%
o・w・f・dianics turquoise blue GFS
0.65% o・w・f・[manufactured by Mitsubishi Kasei Corporation] Dye bath Dye; above Dyeing aid; 0.3 g/(solid content) PH; 4 (80% acetic acid 0.3 cc/bath ratio; 1:20 Temperature; Time: 60℃〓130℃ (2℃/min temperature increase),
130℃, 30 minutes dyeing, 130℃〓90℃ (temperature decrease 3℃/min), hot water washing, water washing, drying Colorimetry: Colorimetric color difference meter DICOM ND-504DE [manufactured by Nippon Denshoku Co., Ltd.] (b) Dispersion Property Test A polyester knitted cloth was wrapped around a colored pet holder and dyed under the following conditions, and the degree of coagulation and adhesion of the dye (casing spot) in the innermost part of the dyed cloth was visually determined. A sample with hardly any dye aggregates attached was graded as 5th grade, a sample with a significant amount of dye aggregate was graded as 1st grade, and the in-between grades were ranked into 5 levels. (Conditions) Dye Dianics Turquoise Blue GFS
3%o・w・f・[manufactured by Mitsubishi Kasei Corporation] Resolin Blue FBL 3%o・w・f・
[Manufactured by Bayer] Dye Kayalon Polyester Orange B Conc 3% o・w・f・[Manufactured by Nippon Kayaku Co., Ltd.] Dianics Red BN-SE 3%
o・w・f・[manufactured by Mitsubishi Kasei Corporation] Bath ratio: 1:20 PH: 5 (80% acetic acid 0.3cc/) Temperature, time: 60℃ x 5 minutes, 60℃〓90℃ (1℃/
Dyeing machine: Colorpet 24 [manufactured by Tsujii Someki Co., Ltd.] (c) Foaming test Place dye bath 5 below into the test machine and circulate the solution. The temperature is increased and the liquid flow is stopped after each temperature is reached.
The amount of foaming was measured after 5 seconds. (Conditions) Dye bath Dyeing aid Dianics Black HG-FS 5
g/ Dianics Orange B-SE 5g/
[Made by Mitsubishi Kasei Corporation] PH: 5 (80% acetic acid 0.3 cc/) Circulating flow rate: 2/min, nozzle diameter 1 mm Testing machine: High-pressure injection liquid flow foaming tester [Effects of the invention] Dyeing assistant of the present invention The agent uses two or more types of disperse dyes with different dyeing feet to enable level dyeing with good dyed surfaces even under severe dyeing conditions due to rapid temperature rise, and dyeing with good reproducibility. Since it has low foaming properties, no troubles due to foaming occur even in rapid jet dyeing machines.

Claims (1)

[Claims] 1 () A mixed ester of an oxyalkylene ether of a trihydric to octahydric alcohol, a dicarboxylic acid, and an aliphatic monocarboxylic acid, containing 30 to 80% by weight of oxyethylene groups in the molecule ( A dyeing aid for polyester fibers, characterized in that it consists of A), and optionally () an aliphatic monocarboxylic acid ester of an oxyalkylene ether of a polyhydric alcohol (B) and/or an anionic surfactant (C). 2 (A) is a general formula {In the formula, X is a dicarboxylic residue; A is an alkylene group;
Y is a trivalent to octavalent polyhydric alcohol residue; Z is H or RCO, and R is an aliphatic monocarboxylic acid residue. (However, at least one of Z is RCO.) _o is an integer of 3 to 8, _n is an integer of 0 to 50, and the total of _n is an integer of 4 to 200. ) The auxiliary agent according to claim 1, which is a compound represented by: