JP2887944B2 - Processing agent for polyester fiber - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyester fiber treating agent which imparts hydrophilicity, antistatic property and antifouling property excellent in washing resistance to polyester fiber and maintains the flexibility of the fiber.

[0002]

2. Description of the Related Art Polyester fibers are used in a wide range of fields from clothing for underwear and outerwear to bedding for sheets and rugs because of their excellent properties. However, these fibers are poor in water absorption because of their high hydrophobicity, and when used for clothing, they do not have a sweat absorption property, so that the wearer feels stuffy. In addition, these fibers are apt to adsorb oily dirt, are difficult to remove the adsorbed dirt, and are liable to be charged. Therefore, they have drawbacks such as binding to the body during wearing and adhesion of dust.

[0003] A number of methods have been proposed to overcome the aforementioned disadvantages of polyester fibers. For example, quaternary ammonium salts such as distearyl dimethyl ammonium chloride have been frequently used as an antistatic treatment agent, but the treatment with these is only temporary because of poor washing resistance.

[0004] On the other hand, in order to modify the surface of polyester-based fibers, treatments such as antistatic property, hydrophilicity and antifouling property with various polymer treating agents have been conventionally performed. As such a treating agent, a polyester ether copolymer obtained by polycondensing a dicarboxylic acid such as terephthalic acid with a dialkylene glycol and a polyalkylene glycol is known. hard.

For example, Japanese Patent Publication No. 47-40873 discloses a polyethylene glycol (molecular weight 1).
06-460) and dimethyl sodium 5-sulfoisophthalate as copolycondensation components, but the blending ratio of polyethylene glycol is as small as 20 mol%, and imparts hydrophilicity to the fiber. Becomes stiff,
The texture is easily damaged.

Further, in the method disclosed in Japanese Patent Publication No. 46-13197, it is difficult to control the degree of polymerization due to a change in the molar ratio between polyethylene glycol and polyethylene glycol monophenyl ether. Is not sufficiently obtained.

The one disclosed in Japanese Patent Publication No. 53-46960 uses a polyalkylene glycol as a copolycondensation component. When a specific emulsifier is used, washing-resistant hydrophilicity can be obtained. Its washing resistance is up to about 5 washings, which is hardly sufficient. Further, the publication discloses a method of adding a water-soluble salt, but this copolymer does not have a sulfonic acid group and thus does not crosslink with a salt.

[0008] Further, Japanese Patent Publication No. 2-14467 discloses that a polyester copolymer obtained by copolymerizing sodium 5-sulfoisophthalate and a polyvalent salt are used in combination. It imparts properties and durability, but has no melting point because of its high melting point, and the fiber becomes coarse and rigid, and the texture is easily damaged. In addition, since the above-mentioned polyester copolymer is not copolymerized with polyethylene glycol, when mixed with a water-soluble polyvalent salt such as magnesium chloride (MgCl ₂ ), salting out and aggregation occur. And water-soluble polyvalent salts are liable to cause practical troubles such as uneven adhesion on fibers.

[0009]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a polyester fiber with hydrophilicity, antistatic property and antifouling property having excellent washing resistance, and furthermore, the flexibility and texture of the fiber. It is an object of the present invention to provide a polyester fiber treating agent which does not cause a decrease or uneven adhesion.

[0010]

Means for Solving the Problems In order to achieve the above object, the present inventor has made a polyester polyether having a sulfonic acid group salt-crosslinked with a water-soluble polyvalent salt, adhered to a polyester fiber, and heat-treated. By doing so, it was found that a hydrophilic treatment having washing resistance can be effectively provided,
The present invention has been reached.

That is, the treating agent for polyester fibers according to the present invention comprises an aqueous dispersion containing a sulfonated polyester polyether and a water-soluble polyvalent salt.

[0012] The sulfonated polyester polyether has, as structural features, a sulfonated polyester portion as a hard segment and a polyether portion as a soft segment. The sulfonated polyester portion has a structure similar to that of the polyester fiber, has a very strong affinity for the polyester fiber, and is fused to the fiber by heat treatment to form a film, contributing to improved washing resistance. However, the salt in the sulfonate is further substituted with a water-soluble polyvalent salt to form a salt crosslink, which further improves the washing resistance. Further, the polyether portion is very flexible, and imparts flexibility, hydrophilicity and antistatic property to the polyester fiber.

[0013] The sulfonated polyester polyether is
In order to exert the above-mentioned effect effectively, (a) terephthalic acid or its condensable derivative 98.0 to 50.0 mol%,
(D) an acid component comprising 2.0 to 30.0 mol% of sodium sulfoisophthalate or a condensable derivative thereof and (c) 0 to 50.0 mol% of a non-sulfonated dicarboxylic acid or a condensable derivative thereof; A) an alkylenediol and (e) an alcohol component composed of polyethylene glycol having a number average molecular weight of 1,000 to 6,000, wherein the weight ratio of the polyester portion / polyether portion in the molecule is preferably 20/80 to 50/50. .

The acid component (a) includes terephthalic acid and its alkyl esters such as methyl, ethyl and propyl esters, and ethylene glycol esters. The acid component (b) includes sodium 5-sulfoisophthalate and alkyl esters such as methyl, ethyl and propyl esters thereof, ethylene glycol esters and the like. The acid component (c) includes aromatic dicarboxylic acids such as isophthalic acid and phthalic acid, succinic acid, glutaric acid, azelaic acid,
Examples include aliphatic dicarboxylic acids such as sebacic acid, adipic acid and dodecanoic acid.

If the amount of the acid component (a) is less than 50.0 mol% with respect to the total acid components, the adhesiveness to the polyester fiber is deteriorated, and the washing resistance is reduced. %, The water dispersibility deteriorates.
The amount of the acid component (b) is 2.0 mol% based on all the acid components.
If it is less than 3, the effect of salt crosslinking is reduced, and the washing resistance is reduced. If it exceeds 30.0 mol%, the water solubility becomes too high, and the washing resistance is reduced. Further, the acid component (c) is useful for stabilizing the dispersibility in water, but the content of the acid component (c) is 50.0 mol% with respect to the total acid component.
If the ratio exceeds the above range, the adhesiveness to the polyester fiber becomes poor and the washing resistance is lowered.

On the other hand, the alcohol component (d) includes ethylene glycol, propylene glycol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,8-octanediol, 1,10 -Alkylenediols such as dodecanediol, diethylene glycol and dipropylene glycol. The alcohol component (e) has a number average molecular weight of 10 as described above.
When the number average molecular weight is less than 1000, the copolymer becomes hard and reduces the texture of the fiber. When the number average molecular weight is more than 6000, the viscosity of the aqueous dispersion of the copolymer is increased. Very high and difficult to handle.

The sulfonated polyester polyether of the present invention can be synthesized by a conventional technique in the art. As the transesterification catalyst, for example, well-known catalysts selected from alkali and alkaline earth metals such as lithium, sodium, calcium and magnesium and transition and IIB metals such as manganese, cobalt and zinc are used. , Oxides, carbonates or acetates. Further, as the polycondensation reaction catalyst, for example,
A well-known catalyst selected from germanium trioxide, titanium alkoxide, antimony trioxide and the like is used.
The synthesis of sulfonated polyester polyethers is usually
It is composed of a transesterification reaction carried out at 140 to 250 ° C in an inert gas atmosphere while removing methanol, water and the like, followed by a polycondensation reaction carried out at 180 to 270 ° C under reduced pressure.

The weight ratio of the polyester portion / polyether portion in the molecule of the sulfonated polyester polyether must be in the range of 20/80 to 50/50 as described above. When the ratio is less than 20/80, the adhesiveness to the polyester fiber is deteriorated and the washing resistance is lowered. When the ratio is more than 50/50, the processed polyester fiber becomes coarse and stiff. Decrease.

In the present invention, the water-soluble polyvalent salt used in combination with the sulfonated polyester polyether includes, for example, magnesium chloride (MgCl ₂ ), magnesium sulfate (MgSO ₄ ), magnesium nitrate @ Mg (NO ₃ ).
₂ }, magnesium acetate {Mg (CH ₃ COO) ₂ }, calcium chloride (CaCl ₂ ) and barium chloride (BaC)
l ₂₎ has divalent cationic salt and aluminum sulfate _{{Al 2 (SO 4) 3} } trivalent cationic salts such as such as, in particular magnesium chloride hexahydrate (MgC
l ₂ · 6H ₂ O) are most preferred.

The treating agent according to the present invention contains the sulfonated polyester polyether in an amount of 0.01 to 5.0 parts by weight, preferably 0.05 to 100 parts by weight, based on 100 parts by weight of the polyester fiber.
-1.0 parts by weight, 0.01-1.0 parts by weight of water-soluble polyvalent salt, preferably 0.02-0.5 parts by weight, when used so as to adhere to each other, the intended treatment effect Is exhibited well. As the processing method, for example, a known exhaustion method, padding method, spray method, or the like can be used. The polyester fiber to be processed, for example, polyethylene terephthalate, polyethylene terephthalate / isophthalate and polyethylene terephthalate / butylene terephthalate, etc.
Knitted fabrics and nonwoven fabrics are included.

[0021]

The present invention will be described below with reference to Examples 1 to 6 and Comparative Examples 1 to 6 using various copolymers produced in Synthesis Examples 1 to 8.
5 will be described.

Synthesis Example 1 174.6 g (0.9 mol) of dimethyl terephthalic acid, 5-methyl terephthalate, were placed in a 1-liter flask equipped with a stirrer, a thermometer, a rectification column, and an inert gas introduction tube.
29.6 g of dimethyl sodium sulfoisophthalate
(0.1 mol), 124 g of ethylene glycol (2.0
Mol), polyethylene glycol (number average molecular weight 400)
0) 400 g (0.1 mol), 0.2 g of manganese acetate tetrahydrate as a transesterification catalyst, and 0.1 g of tetrabutyl titanate as a polycondensation catalyst were charged.
The transesterification is carried out at 0 ° C. When the internal temperature reached 150 ° C., methanol began to distill. The internal temperature was gradually raised, and when the internal temperature reached 250 ° C., the transesterification was completed. Subsequently, 0.1 g of trimethyl phosphate was added, the internal temperature was lowered to 200 ° C., and a polycondensation reaction was carried out under a reduced pressure of 10 mmHg for 1 hour to produce a sulfonated polyester polyether according to the present invention.

Analysis shows that the yield of the copolymer is 620
g, acid value 3.5 KOHmg / g, hydroxyl value (O
(H value) was 10.5 KOH mg / g, the number average molecular weight by the end group method was about 8,000, and the weight ratio of polyester portion / polyether portion in the molecule was 35/65.

[Synthesis Examples 2 to 6] Other sulfonated polyester polyethers according to the present invention were produced in the same procedure as in Synthesis Example 1. The raw material composition and analytical values of the copolymers in Synthesis Examples 2 to 6 are shown in Table 1 below together with the case of Synthesis Example 1.

[0025]

[Table 1]

[Synthesis Example 7] 135.8 g of dimethyl terephthalic acid (0.7 liter) was placed in a 1-liter flask as described above.
Mol), 38.8 g (0.2 mol) of dimethyl isophthalic acid, dimethyl sodium 5-sulfoisophthalate 2
9.6 g (0.1 mol), ethylene glycol
0 g (2.0 mol), 0.2 g of manganese acetate tetrahydrate as a transesterification catalyst and 0.1 g of tetrabutyl titanate as a polycondensation catalyst were charged, and a transesterification reaction was carried out under the same conditions as in Synthesis Example 1. . Then, 0.1 g of trimethyl phosphate was added, and a reaction temperature of 250 ° C. and 10 g were added.
A polycondensation reaction was carried out for 2 hours under a reduced pressure of mmHg to produce a sulfonated polyester for comparison.

Analysis shows that the yield of the copolymer is 230
g, acid value is 3.4 KOHmg / g, and OH value is 4.0 KO
Hmg / g, number average molecular weight by end group method is about 1500
It was 0.

[Synthesis Example 8] 116.4 g of dimethyl terephthalic acid (0.6
Mol), 77.6 g (0.4 mol) of dimethyl isophthalic acid, 142.6 g (2.3 mol) of ethylene glycol, polyethylene glycol (number average molecular weight 400
0) 500 g (0.125 mol), 0.2 g of manganese acetate tetrahydrate as a transesterification catalyst, and 0.1 g of tetrabutyl titanate as a polycondensation catalyst were charged into a 1-liter flask, under the same conditions as in Synthesis Example 1. A transesterification reaction was performed under the following conditions. Subsequently, 0.1 g of trimethyl phosphate was added, and a polycondensation reaction was performed at a reaction temperature of 220 ° C. under a reduced pressure of 10 mmHg for 1 hour to produce a polyester polyether for comparison.

Analysis shows that the yield of the copolymer is 710
g, acid value is 4.4 KOHmg / g, OH value is 5.0 KO
Hmg / g, number average molecular weight by end group method is about 1200
It was 0.

Example 1 5 liters in a 10 liter beaker
3255 g of hot water at 0 ° C. was added, and 620 g of the sulfonated polyester polyether of Synthesis Example 1 cooled to 180 ° C. was slowly added dropwise while stirring with a homogenizer.
After dispersing for 0 minutes, the mixture was cooled to room temperature to produce 3875 g of a 16% aqueous sulfonated polyester polyether dispersion. ₂ g of MgCl ₂ .6H ₂ O was added to 100 g of the aqueous dispersion.
20 g of an aqueous solution adjusted to 0% was added to produce 120 g of the treating agent 1 according to the present invention.

In the same manner as described above, 20% Mg was added to each of the aqueous dispersions of the sulfonated polyester polyethers of Synthesis Examples 2 to 6.
An aqueous solution of Cl ₂ was added to produce treating agents 2 to 6 according to the present invention.

Comparative Example 1 200 g of the sulfonated polyester of Synthesis Example 7 was ground and dissolved in 800 g of water at 80 ° C. for 2 hours. 20 g of a 20% MgCl ₂ aqueous solution was mixed with 100 g of this 20% sulfonated polyester aqueous solution to produce Comparative Treatment Agent 1.

Further, 150 g of the polyester polyether of Synthesis Example 8 was heated to 150 ° C. and melted.
After 0 g of water was slowly added and dispersed while stirring with a homogenizer, the mixture was cooled to room temperature to produce 1000 g of a 15% polyester polyether aqueous dispersion. 20 g of a 20% aqueous solution of MgCl ₂ was added to 100 g of this aqueous dispersion to prepare Comparative Treatment Agent 2.

[Results of Example 1 and Comparative Example 1] Treatment agent 1
Table 2 below shows the results of observations of the composition of each of Nos. 1 to 6 and Comparative Processing Agents 1 to 2 and the mixing property of the copolymer and the water-soluble polyvalent salt and the storage stability after mixing (2 months).

[0035]

[Table 2]

As shown in Table 2 above, the treating agents 1 to 6 according to the present invention have good mixing properties and preservability of each sulfonated polyester polyether and the water-soluble polyvalent salt. Although the mixing property and preservability of the polyester polyether and the water-soluble polyvalent salt are good, the sulfonated polyester in Comparative Processing Agent 1 may be soluble in water because the raw material composition does not contain polyethylene glycol having high hydration power. Poor miscibility with the ionic polyvalent salt.

Example 2 Treatment agent 1 produced in Example 1
Each of 6 to 40 g / l, formic acid 3 g / l, pH 4.0 adjusted baths were prepared, polyester taffeta was padded, squeezed with a mangle at a squeezing ratio of 80%, 120
After drying at 10 ° C. for 10 minutes, heat treatment was performed at 180 ° C. for 30 seconds. The adhesion rate of the treatment agents 1 to 6 to the cloth was 0.51 each.
%, 0.48%, 0.49%, 0.52%, 0.35%
And 0.35%. The washing test was performed on the above-mentioned work cloth 10, 20 times, 40 times and 50 times, and the water absorbency, antistatic property, antifouling property and rigidity of the work cloth were measured.

The washing test and various measuring methods are as follows. <Washing test> Using a home electric washing machine, a test cloth was treated with a 2 g / l aqueous solution of "New Beads" (a weakly alkaline detergent, manufactured by Kao) at 40 ° C for 10 minutes and a bath ratio of 1:30. After washing down, washing is performed for 5 minutes in water → dehydration → 5 minutes in water → dehydration, and this series of operations is performed once, and this operation is repeated.

<Measurement of water absorption> 0.1 cc of distilled water was dropped on a test cloth from a height of 10 cm, the time (second) until the water was completely absorbed was measured, and the average of 10 measurements was measured. Calculate the value.

<Measurement of Antistatic Property> Using a rotary static tester (manufactured by Koa Shokai), a test cloth was rubbed with a cotton cloth at a temperature of 20 ° C. and a relative humidity of 65% RH, and a friction band voltage (volt) after 1 minute was applied. Is measured.

<Measurement of antifouling property> 0.1 g of artificial soiling detergent (0.03 g of carbon black, 0.02 g of oleic acid, 0.02 g of stearic acid and 0.03 g of hardened tallow oil) and 0.1 g of synthetic detergent were added to water. A test cloth (5 cm × 6 cm) was immersed in the liquid dispersed in 100 g, and 10 steel balls were put therein. A stain resistance test was performed at 50 ° C. for 10 minutes using a round meter, followed by washing with water and drying. Classification is made from the first to fifth grades using the gray scale for contamination (JIS) as described below.

Grade 5: Very good (no dirt attached) Grade 4: Good (slight dirt adhered) Grade 3: Medium (dirty adhered moderately) Grade 2: Bad (contamination is considerably attached) Grade 1: Very bad (contamination is adhered all over)

<Measurement of rigidity (JIS 1096A method)>
Five test cloths (2 cm x 15 cm) were sampled in each of the vertical and horizontal directions, and the short side of each test cloth was placed on a horizontal table having a 45-degree slope, and the test cloth was slid in the slope direction to test. The moved length (mm) when the center point of one end of the cloth is in contact with the slope is measured, and the average value of 10 measurements is calculated.

Comparative Example 2 Polyester taffeta was padded with Comparative Processing Agent 2 prepared in Comparative Example 1 in the same manner as in Example 2, and subjected to a washing test and various measurements.
The adhesion rate of the comparative treatment agent 2 to the cloth was 0.50%.

[Results of Example 2 and Comparative Example 2] Treatment agent 1
For each of the processed cloth and the unprocessed cloth (blank test) padded with Comparative Examples 2 to 6 and Comparative Processing Agent 2, the measurement results of the water absorption, antistatic property, antifouling property and softness were shown in Tables 3 to 6 below. It describes in.

[0046]

[Table 3]

[0047]

[Table 4]

[0048]

[Table 5]

[0049]

[Table 6]

As shown in Tables 3 to 6, in the treating agents 1 to 6 according to the present invention, each of the sulfonated polyester polyethers undergoes salt cross-linking by salt substitution with a water-soluble polyvalent salt, so that extremely excellent resistance. Although the washing property is obtained, the comparative processing agent 2
Since the polyester polyether has no sulfonic acid group and does not undergo salt crosslinking even in the presence of a water-soluble polyvalent salt, required washing resistance cannot be obtained.

With respect to water absorption, the treatments 1 to 6 were washed 5 times.
While almost unchanged even after 0 times, the comparative treatment agent 2 sharply drops after more than 20 washes. Regarding the antistatic property, the treatment agents 1 to 6 only slightly decrease in accordance with the number of washings, but the comparative treatment agent 2 has a value close to a blank value after 40 washings. In other words, it can be seen that, in Comparative Processing Agent 2, the polyester polyether falls off early due to the physical rubbing action during washing, and does not effectively remain on the fiber at the time of the washing. Concerning the antifouling property, the treatment agents 1 to 6 hardly changed after 50 washes, whereas the comparative treatment agent 2
In this case, the value drops to the blank value after 40 washes. Regarding the bristles, the treatment agents 1 to 6 showed excellent washing resistance as described above, but the work cloth had almost the same soft texture before and after washing 50 times before and after washing. Hold.

Example 3 Treatment agent 1 produced in Example 1
6 to 4% (OWF), 0.3 g / l of trade name "IONET RAP-1170" (leveling agent, manufactured by Sanyo Chemical Industries), and 0.3 g / l of formic acid , Bath ratio 1: 2
Each treatment bath was set to 0, and the polyester taffeta was exhausted by a high-pressure dyeing machine at 130 ° C. for 20 minutes, washed with water,
After drying at 120 ° C. for 10 minutes, heat treatment was performed at 180 ° C. for 30 seconds. The work cloth was subjected to a washing test and various measurements in the same manner as in Example 2.

[Comparative Example 3] Polyester taffeta was subjected to an exhaustion treatment in the same manner as in Example 3 using Comparative Treatment Agent 2 produced in Comparative Example 1, and subjected to a washing test and various measurements.

[Results of Example 3 and Comparative Example 3] Treatment agent 1
Table 6 shows the measurement results of water absorption, antistatic property, antifouling property, and bristles of each of the processed cloth and the unprocessed cloth (blank test) that have been exhausted with Comparative Processing Agent No. 6 to Comparative Processing Agent 2.
10 to 10.

[0055]

[Table 7]

[0056]

[Table 8]

[0057]

[Table 9]

[0058]

[Table 10]

As shown in Tables 7 to 10, the treatment agents 1 to 6 according to the present invention can obtain very excellent washing resistance, similarly to the case of the padding treatment in Tables 3 to 6 described above.

COMPARATIVE EXAMPLE 4 Comparative treatment agents 3 to 6 each consisting of a 16% aqueous dispersion of each of the sulfonated polyester polyethers of Synthesis Examples 1 to 6 and containing no water-soluble polyvalent salt were used.
8 and 40 g / l of these comparative treatment agents 3 to 8 and 3 g / l of formic acid, and each treatment bath adjusted to pH 4.01 was prepared, padded with polyester taffeta, and mangled at a squeezing ratio of 80%. After squeezing and drying at 120 ° C. for 10 minutes, heat treatment was performed at 180 ° C. for 30 seconds. The work cloth was subjected to a washing test and various measurements in the same manner as in Example 2.

[Results of Comparative Example 4] For each work cloth padded with the comparative treatment agents 3 to 8, the measurement results of water absorption, antistatic property and antifouling property are shown in Tables 11 to 13 below.
It describes in.

[0062]

[Table 11]

[0063]

[Table 12]

[0064]

[Table 13]

As shown in Tables 11 to 13, Comparative Processing Agents 3 to 8 which do not contain a water-soluble polyvalent salt show a certain degree of washing resistance at first, but have a water absorption after 20 washings.
A sharp decrease occurs in the antistatic property and antifouling property.

Example 4 The sulfonated polyester polyether of Synthesis Example 1 was dispersed in water in the same manner as in Example 1 to produce 100 g of a 16% aqueous dispersion, which was dissolved in a water-soluble polyvalent salt, MgCl _2. 6H ₂ O, Mg (CH ₃ COO) ₂ ,
_{MgSO 4 · 7H 2 O, CaCl} 2, BaCl 2 , and A
l ₂ (SO ₄ ) ₃ were mixed with various aqueous solutions to produce treating agents 7 to 12 according to the present invention.

[Results of Example 4] Table 14 below shows the composition of each of the treating agents 7 to 12 and the observation result of the mixing property between the copolymer and the water-soluble polyvalent salt.

[0068]

[Table 14]

As shown in Table 14, the treating agents 7 to 12 according to the present invention had good mixing properties and did not cause salting out at all.

[Example 5] Treatment agent 7 produced in Example 4
According to Nos. To 12, the polyester taffeta was padded in the same manner as in Example 2 and subjected to a washing test and various measurements.

[Results of Example 5] The measured results of water absorption, antistatic property and antifouling property of each of the work cloths padded with the treating agents 7 to 12 are shown in Tables 15 to 17 below.

[0072]

[Table 15]

[0073]

[Table 16]

[0074]

[Table 17]

As shown in Tables 15 to 17, in the treatment agents 7 to 12 according to the present invention, although there is a slight difference depending on the type of the water-soluble polyvalent salt, very excellent washing resistance can be obtained.

Example 6 A 20% aqueous solution of MgCl ₂ was added to 100 g of a 15% aqueous dispersion of the sulfonated polyester polyether of Synthesis Example 2 in an amount of 5 g, 20 g, 40 g and 60 g, respectively. 13-16 were each manufactured.

Next, the polyester jaw jet was padded with the above-mentioned treating agents 13 to 16 under the same conditions as in Example 2, and subjected to a washing test and various measurements.

[Comparative Example 5] A comparative treatment agent 9 consisting of a 15% aqueous dispersion of the sulfonated polyester polyether of Synthesis Example 2 alone and containing no water-soluble polyvalent salt was used. The polyester jaw jet was padded under the same conditions as in Example 2 and subjected to a washing test and various measurements.

[Results of Example 6 and Comparative Example 5] Treatment agent 1
For each of the processed cloth and the unprocessed cloth (blank test) padded with 3 to 16 and the comparative processing agent 9,
The results of measurements of water absorption, antistatic properties and antifouling properties are shown in Tables 18 to 20 below.

[0080]

[Table 18]

[0081]

[Table 19]

[0082]

[Table 20]

As shown in Tables 18 to 20, the treating agents 13 to 16 according to the present invention exhibit excellent effects particularly in water absorption and antistatic properties, and the effect is due to the amount of the water-soluble polyvalent salt added. Is constant in the treating agents 14 to 16 whose amount is 20 g or more, but the required washing resistance cannot be obtained with the comparative treating agent 9 containing no water-soluble polyvalent salt.

[0084]

Since the polyester fiber treating agent according to the present invention is constituted as described above, it imparts hydrophilicity excellent in washing resistance, antistatic property and antifouling property to the polyester fiber, and It has the effect of maintaining the flexibility and texture of the fiber and preventing uneven adhesion due to salting out.

Claims (3)

(57) [Claims] 1. A polyester fiber treating agent comprising an aqueous dispersion containing a sulfonated polyester polyether and a water-soluble polyvalent salt. 2. The sulfonated polyester polyether is (a) terephthalic acid or a condensable derivative thereof.
0 to 50.0 mol%, (b) 2.0 to 30.0 mol% of sodium sulfoisophthalate or a condensable derivative thereof, and (c) 0 to 50.0 mol% of a non-sulfonated dicarboxylic acid or a condensable derivative thereof. An acid component consisting of (d) an alkylene diol and (e) a number average molecular weight of 1,000 to 60
The polyester fiber treating agent according to claim 1, which is synthesized from an alcohol component composed of polyethylene glycol and has a weight ratio of polyester portion / polyether portion in the molecule of 20/80 to 50/50. 3. The polyester fiber treating agent according to claim 1, wherein the water-soluble polyvalent salt is a cationic salt of a metal selected from magnesium, calcium, barium and aluminum.