JPS623274B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention provides a resin processing method for knitted fabrics, in particular, a method for simultaneously imparting a soft texture and a high anti-wrinkle effect to knitted fabrics made of a blend of cotton and polyester fibers (hereinafter referred to as cotton-polyester fiber blend knitted fabrics). Regarding resin processing methods. Conventionally, in order to impart a durable anti-wrinkle effect to cotton-polyester fiber blend knitted fabrics, reaction products of alkylene urea, hydroxyethylene urea (glyoxal urea), triazone, triazine, or alkyl carbamates with formaldehyde have been used. A method using a so-called cellulose-reactive resin as a processing agent is known. However, when resin processing is performed using these processing agents, materials other than hydroxyethylene urea resin tend to undergo hydrolysis over time, especially after the release of formaldehyde from clothing is regulated. As a difficult resin, so-called glyoxal resin, which is a reaction product of dihydroxyethylene urea and formaldehyde, has been popularized and widely used. However, glyoxal resin has an excellent anti-wrinkle effect, and even when soaping is performed, the resin body formed in the fiber is difficult to be eluted and removed due to its washing resistance. The texture imparted is hard and is not necessarily satisfactory in terms of texture. On the other hand, in recent years, particularly in cotton-polyester fiber blended knitted fabrics, the finished texture tends to be soft rather than hard, and there is a strong demand for softer texture. For this reason, the present inventors have taken advantage of the excellent properties of glyoxal resin to specifically
In order to simultaneously impart a soft feel and a high degree of anti-wrinkle effect to polyester fiber blend knitted fabrics in a well-balanced manner, the present invention was achieved as a result of extensive research into resin processing methods. That is, the present invention provides N-methylol-N'-methoxymethyl-4-methoxy-5-hydroxy-
2-imidazolidinone and mixing ratio (weight) 50:
Cotton-
This is a resin processing method for cotton-polyester fiber blend knitted fabrics, which is characterized by soaking the polyester fiber blend knitted fabrics and, if necessary, squeezing them and then subjecting them to heat treatment. It is now possible to simultaneously achieve a highly flexible finish and a durable, highly anti-wrinkle effect without the need for hardening. N-methylol-N'-methoxymethyl-4-methoxy-5-hydroxy used in the present invention
2-Imidazolidinone exhibits good wrinkle resistance when catalyzed by ammonium salts such as diammonium phosphate and ammonium sulfate, zinc nitrate, magnesium chloride, or organic acids, and exhibits excellent performance as a resin finishing agent for cellulose fabrics. Although this is known,
When it comes to resin processing of cotton-polyester fiber blend knitted fabrics, there is almost no consideration given to softening the texture.
In the above method, it was not possible to soften the texture at the same time. Furthermore, by varying the chain length of the two alkoxy groups in the molecule of 4,5-bis(alkoxy)-2-imidazolidinone, which is a similar compound, the performance of the processed cloth can be varied in various ways. For example, it is already known to selectively use methoxy groups when emphasis is placed on anti-wrinkle properties, and n-butoxy groups when a particularly soft touch is desired, but both of these have anti-wrinkle effects. This is a resin processing method that separates soft texture, and cannot simultaneously satisfy a high degree of anti-wrinkle effect and a high degree of soft texture. However, the present inventors found that N-methylol-N'-methoxymethyl-4-methoxy-5-hydroxy-2
- When imidazolidinone is used as a resin finishing agent, when magnesium chloride and mineral acid ammonium salt or organic acid are used together in a specific ratio as catalysts, it is possible to maintain an excellent anti-wrinkle effect and at the same time achieve a high degree of softness. The inventors found that this effect was completely unexpected based on the prior art. Note that as a method similar to the present invention, N, N′-
Dimethylolation-4,5-bis(hydroxy)-
It is also possible to apply the method of the present invention by using an ordinary glyoxal resin containing 2-imidazolidinone as a resin processing agent, but in this case, the flexibility of the texture itself is inferior and the resin is It has the disadvantage that the texture becomes noticeably harder as the concentration used increases, so it is not always satisfactory. The present invention is characterized by the combined use of magnesium chloride and mineral acid ammonium salts or organic acids as catalysts during resin processing, and examples of mineral acid ammonium include ammonium sulfate, ammonium chloride, ammonium nitrate, and monoammonium phosphate. Examples of organic acids include maleic acid, tartaric acid, malic acid, etc., and the ratio of their combination is usually magnesium chloride in order to provide a well-balanced anti-wrinkle effect and soft texture at the same time. : Ammonium mineral acid or organic acid = 50:1 to 2:1 (weight ratio), and a more preferable combination is magnesium chloride: ammonium mineral acid = 20:1 to 2:1, magnesium chloride: organic acid = 20: The ratio is 1 to 3:1. The amount of catalyst used may be the same as that normally used for cellulose-reactive resins, and N-methylol-
The amount is 5 to 20% by weight, preferably 5 to 15% by weight, based on N'-methoxymethyl-4-methoxy-5-hydroxy-2-imidazolidinone. If the amount of catalyst is less than 5%, the anti-wrinkle effect will be insufficient;
If it exceeds this amount, side effects such as a decrease in strength or yellowing of the color tend to occur. In the method of the present invention, softeners used in ordinary resin processing, such as higher fatty acid derivatives, silicone compounds, etc., can be used in combination. The present invention is directed to cotton-polyester blend knitted fabrics, and the blend ratio is 50% polyester.
% or more, especially 60% or more, the effect becomes remarkable. In addition, N-methylol-N′- used in the present invention
Methoxymethyl-4-methoxy-5-hydroxy-2-imidazolidinone does not necessarily have to be a pure product; for example, it may be a mixture containing some impurities after the reaction for producing the compound. The present invention will be explained below by way of examples. Example 1 N-methylol-N'-methoxymethyl-4-
0.54 g of a 5:1 (weight ratio) mixture of magnesium chloride and ammonium sulfate is added to 15 g of a 40% aqueous solution of methoxy-5-hydroxy-2-imidazolidinone, and the whole is diluted with water to 100 c.c. for resin processing. It was a bath. A 65/35 polyester/cotton blend broadcloth was immersed in this resin bath, squeezed to a 65% pick-up, pre-dried at 105°C for 2 minutes, and then
Curing was performed at 150°C for 3 minutes to obtain a processed fabric. When the physical properties of the obtained processed cloth were tested, the results shown in Table 1 were obtained. For comparison, N,N′-dimethylol-4,
Table 1 shows the results of testing the physical properties of the processed fabric in exactly the same manner as above except for using 5-bis(hydroxy)-2-imidazolidinone. The physical properties were measured by the following method. This also applies to the following examples. Wrinkle resistance: JIS L-1004 B method Monsanto method, expressed as the total opening angle in the latitudinal direction. Bending resistance: JIS L-1004 handrometer method (total hand) Shown as measured value with a gap of 20 mm.

【table】

[Table] Example 2 N-methylol-N'-methoxymethyl-4-
Add the specified amount of the catalyst shown in Table 2 to 15 g of a 40% aqueous solution of methoxy-5-hydroxy-2-imidazolidinone, dilute it with water so that the total amount is 100 c.c., and prepare each resin processing bath. And so. Using each resin processing bath, cotton-polyester blended broadcloth was resin-processed in the same manner as in Example 1, and the physical properties of each of the resulting processed fabrics were tested, and the results shown in Table 2 were obtained.

【table】

[Table] Example 3 N-methylol-N'-methoxymethyl-4-
0.54 g of a 5:1 mixture of magnesium chloride and ammonium sulfate was added to 15 g of a 40% aqueous solution of methoxy-5-hydroxy-2-imidazolidinone, and the whole was diluted to 100 c.c. with water to prepare a processing resin bath. Using this resin bath, a polyester/cotton blended broadcloth was processed in the same manner as in Example 1. However, the curing temperature was conducted at four levels: 140°C, 150°C, and 160°C to examine the effects of curing temperature. For comparison, a 40% aqueous solution of N,N'-dimethylol-4,5-bis(hydroxy)-2-imidazolidinone, which is a common type of glyoxal resin, was processed in the same manner. Table 3 shows the physical properties of each processed cloth.

[Table] Example 4 N-methylol-N'-methoxymethyl-4-
Take a specified amount of a 40% aqueous solution of methoxy-5-hydroxy-2-imidazolidinone as shown in Table 4, and add 9:1 of a 5:1 mixture of magnesium chloride and ammonium sulfate to the solid weight of each component. % amount (weight) and the whole was diluted with water to make 100 c.c. to obtain resin baths with different resin concentrations. Using this resin bath, a polyester/cotton blended broadcloth was processed in the same manner as in Example 1, and the resulting processed fabric was tested for bending resistance, and the results shown in Table 4 were obtained. For comparison, N,N′-dimethylol-4,5
Table 4 shows the results of tests conducted in exactly the same manner except that -bis(hydroxy)-2-imidazolidinone was used.

[Table] Example 5 N-methylol-N'-methoxymethyl-4-
Take a specified amount of a 40% aqueous solution of methoxy-5-hydroxy-2-imidazolidinone as shown in Table 4, and add a 9:1 mixture of magnesium chloride and maleic acid to it, based on the solid weight of each component. Add 6% amount (weight) and dilute the whole with water to 100%
cc, and resin baths with different resin concentrations were obtained. Using this resin bath, a polyester/cotton blended broadcloth was processed in the same manner as in Example 1, and the resulting processed fabric was tested for bending resistance, and the results shown in Table 4 were obtained. For comparison, N,N′-dimethylol-4,5
Table 5 shows the results of tests conducted in exactly the same manner except that -bis(hydroxy)-2-imidazolidinone was used.

【table】

【table】

Claims (1)

[Claims] 1 N-methylol-N'-methoxymethyl-4
- A cotton-polyester fiber blend knitted fabric is added to an aqueous solution containing methoxy-5-hydroxy-2-imidazolidinone and a magnesium chloride-mineral acid ammonium salt or organic acid mixture at a mixing ratio (weight) of 50:1 to 2:1. A resin processing method for a cotton-polyester fiber blend knitted fabric, which is characterized by soaking it, squeezing it if necessary, and then heat-treating it.