JPH10298871A - Oil agent for elastic fiber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an oil agent for polyurethane elastic fibers, excellent in antistatic properties, improved in sticking preventing and unwinding properties and capable of retaining stable operating efficiency from a spinning to a post- processing steps by compounding a specific ether-modified polysiloxane with a diorganopolysiloxane and/or a mineral oil. SOLUTION: This oil agent for elastic fibers is obtained by compounding 0.01-20 wt.% of an ether-modified polysiloxane, represented by the formula [R<1> is a monovalent hydrocarbon; R<2> is a 1-4C alkyl; OA is oxyethylene and/or oxypropylene; R<3> is a monovalent hydrocarbon; (m) is a number of >=1; (n) is 1-20; (p) is 1-50 and (q) is 0-5] and having 10-20,000 mm<2> /see viscosity with 50-99.9 wt.% of a diorganopolysiloxane and/or a mineral oil.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil agent for elastic fibers, and more particularly, to obtain a polyurethane elastic fiber containing an ether-modified polysiloxane having a specific chemical structure and having excellent antistatic properties and anti-sticking property between fibers. Oil agent.

[0002]

2. Description of the Related Art Conventionally, polyurethane elastic fibers have a problem of poor unwinding property in a post-processing step because of the large adhesiveness between the fibers. Further, when used for a tricot product, which is one of the main uses, a large amount of static electricity is generated between various guides in a warping process, and many problems such as thread breakage occur.

Among them, a method of improving the anti-sticking property between fibers includes a method of dispersing metal soap in a base oil mainly composed of dimethylpolysiloxane or mineral oil to use a metal soap to exhibit a releasing effect (Japanese Patent Publication No. 41-
265, Japanese Patent Publication No. 40-5557).

However, it is difficult to disperse these metal soaps in base oils such as dimethylpolysiloxane and mineral oil, and the metal soaps settle in the oil over time, causing uneven adhesion to the fibers, resulting in post-processing steps. Thus, troubles due to uneven unwinding were likely to occur, and the effect was not satisfactory.

[0005] As a method of improving the antistatic property,
A method using an alkyl phosphate metal salt (Japanese Patent Publication No. Sho 4
No. 1-21956) has been proposed.

[0006] However, these phosphates have poor compatibility with base oils such as dimethylpolysiloxane and mineral oil, and the phosphates are separated into the oil over time, making it difficult to uniformly adhere to the fibers and making it impossible to exhibit antistatic properties. Problems often occur, and it is difficult to obtain long-term stable operability such as accumulation of scum on the yarn path.

[0007]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to improve the antistatic property and to prevent the fibers from sticking together on the cheese and to improve the unwinding property when producing polyurethane elastic fibers. Another object of the present invention is to provide an oil agent for polyurethane elastic fibers which can provide good operability in the post-processing step from spinning.

[0008]

Means for Solving the Problems The present inventors have intensively studied to obtain an oil agent for polyurethane elastic fibers which is excellent in aging stability, antistatic properties, prevents sticking and improves unwinding properties. The inventors have found that the above problem can be solved by attaching an oil agent containing an ether-modified polysiloxane having a specific chemical structure to fibers, and have reached the present invention.

That is, the present invention relates to an oil agent for elastic fibers comprising an ether-modified polysiloxane represented by the following general formula (1).

[0010]

Embedded image

Wherein R ¹ is a monovalent hydrocarbon group which may be the same or different; R ² is an alkylene group having 1 to 4 carbon atoms; OA is an oxyethylene group and / or an oxypropylene group; R ³ is a monovalent hydrocarbon group which may be the same or different; m is a number of 1 or more; n is 1 to 20
, P represents a number of 1 to 50, and q represents a number of 0 to 5. )

In the general formula (1), R ¹ is a monovalent hydrocarbon group. The monovalent hydrocarbon group is not particularly limited,
Aliphatic hydrocarbon groups (methyl, ethyl, propyl,
Isopropyl group, butyl group, 2-ethylhexyl group, didecyl group, octadecyl group, etc.), aromatic hydrocarbon group (phenyl group, biphenyl group, naphthyl group, phenanthryl group, etc.), alicyclic hydrocarbon group (cyclopropyl group, Cyclohexyl group). Among them, preferred groups are a methyl group and a phenyl group. These may be a mixture of two or more.

In the general formula (1), R ² has 1 to 1 carbon atoms.
4 alkylene group.

In the general formula (1), R ³ is a monovalent hydrocarbon group. The monovalent hydrocarbon group is not particularly limited,
Aliphatic hydrocarbon groups (methyl, ethyl, propyl,
Isopropyl group, butyl group, 2-ethylhexyl group, octyl group, nonyl group, decyl group, didecyl group, octadecyl group, etc., aromatic hydrocarbon group (phenyl group, biphenyl group, naphthyl group, phenanthryl group, etc.), alicyclic ring Formula hydrocarbon groups (cyclopropyl group, cyclohexyl group, etc.) are exemplified. Of these, preferred groups are aliphatic hydrocarbon groups having 1 to 24 carbon atoms. These may be a mixture of two or more.

In the general formula (1), OA usually includes an oxyethylene group and an oxypropylene group. OA
May be the same or different. When the oxyethylene group and the oxypropylene group are used in combination, the mode of addition may be random addition or block addition.

In the general formula (1), p is a number of 1 to 50, preferably 1 to 20. If it is 0, it is difficult to exhibit the antistatic effect, and if it exceeds 50, the compatibility with the base oil (dimethylpolysiloxane or mineral oil) may be poor.

In the general formula (1), q is a number from 0 to 5, m
Represents a number of 1 or more, and n represents a number of 1 to 10.

The content of the ether-modified polysiloxane of the present invention is 0.01 to 20% by weight based on the total weight of the oil.
Preferably it is 0.05 to 5% by weight. If it is less than 0.01, it is difficult to exhibit an antistatic effect, and if it exceeds 20, the viscosity of the entire oil agent may be significantly increased, causing problems such as thread breakage when spinning fine denier yarn. May cause

The viscosity of the ether-modified polysiloxane of the present invention is from 10 to 20,000 square millimeters per second (centistokes), preferably from 10 to 10,000 square millimeters per second. If it is less than 10, it is difficult to exhibit an antistatic effect, and if it exceeds 20,000,
The viscosity of the whole oil agent may be significantly increased, and a problem such as thread breakage may occur when spinning fine denier yarn.

The method for producing the ether-modified polysiloxane of the present invention is not particularly limited.
It can be produced by a method in which an alkylene oxide adduct derivative of allyl alcohol is added to a polysiloxane having a group under a platinum catalyst.

The viscosity of the oil agent containing the ether-modified polysiloxane of the present invention is preferably not more than 100 square millimeters per second at 25.degree.

As the base oil of the oil agent containing the ether-modified polysiloxane of the present invention, a diorganopolysiloxane or a mineral oil is usually used in order to reduce friction with various rollers or guides in the spinning and post-processing steps. Is preferred.

The main agent used in the oil agent for elastic fibers of the present invention includes diorganopolysiloxane and / or mineral oil. Examples of the diorganopolysiloxane include dimethylpolysiloxane and those obtained by substituting some of the methyl groups of dimethylpolysiloxane with other alkyl groups and phenyl groups. In any case, any one may be selected as long as the viscosity of the whole blended oil is 100 square millimeters per second or less, but usually 3 to 50 square millimeters per second is preferable. If the viscosity is less than 3 square millimeters per second, the volatility tends to be high and adhesion to the yarn tends to be difficult. If the viscosity exceeds 50 square millimeters per second, it may be difficult to control the viscosity of the entire blended oil.

As the mineral oil used in the oil agent for elastic fibers of the present invention, any mineral oil may be selected as long as the viscosity of the whole blended oil is not more than 100 square millimeters per second at 25 ° C. Is preferably 3 to 50 square millimeters per second. If the viscosity is less than 3 square millimeters per second, it tends to be highly volatile and difficult to adhere to the yarn, and if it exceeds 50 square millimeters per second, it may be difficult to control the viscosity of the entire blended oil.

The content of the diorganopolysiloxane and / or mineral oil in the oil agent is usually 50 to 99.9% by weight, preferably 70 to 99.9% by weight from the viewpoint of the anti-sticking property and the antistatic effect. 9% by weight.

The oil agent for elastic fibers of the present invention may further comprise, if necessary, an anti-sticking component, for example, mineral solid fine particles such as talc, silica and colloidal alumina, or metal powder salts of higher fatty acids, or room temperature such as paraffin and polyethylene. Solid wax or amino-modified silicone,
Epoxy-modified silicone, carboxy-modified silicone,
As a modified silicone such as silicone resin or a binding agent, alcohols, fatty acid esters, etc., may be added to the extent that the performance of the ether-modified polysiloxane of the present invention is not impaired. Can be. In addition, antistatic agents, antioxidants,
Components commonly used in spinning oils, such as ultraviolet absorbers, can be blended.

The oil agent for elastic fibers of the present invention can be applied to the yarn by roller oiling or nozzle oiling at any position after spinning and before the yarn is wound in the polyurethane fiber spinning process. The oil agent of the present invention is usually 0.5 to 10% by weight, preferably 1 to 10% by weight based on the polyurethane elastic fiber.
8% by weight is applied.

[0028]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the present invention is limited thereto.

The ether-modified polysiloxane for the examples shown in Table 1 was blended in the composition ratio shown in Table 2, and
2 and the oil agents for elastic fibers of Comparative Examples 1 to 3 were prepared. Further, (a) chronological stability, (b) scum generation, (c) adhesiveness, and (d) static electricity performance were evaluated. The evaluation results are also shown in Table 2.

[0030]

[Table 1]

The test methods for the stability of the oils obtained in the examples and comparative examples with time, the generation of scum, the sticking property and the static electricity of the yarns provided with the oils are as follows. (B) Stability over time Put the prepared oil into a 100 ml glass bottle
After standing in a thermostat at 60 ° C. for 60 days, the appearance was visually observed, compared with the appearance immediately after the preparation, and evaluated according to the following criteria. -Evaluation Criteria- ○: No change △: Slight precipitates ×: Lots of precipitates (b) Scum generation In dry spinning of polyurethane fibers, the oil agent shown in Table 1 was supplied with a roller and the amount of oil applied was 6% based on the weight of the filament. And wound on cheese at 600m / min.
A 40D polyurethane fiber was obtained. 48 hours after the start of spinning, the presence or absence of scum on the yarn path was visually observed and evaluated according to the following criteria. -Evaluation criteria- ○: No occurrence △: Occurrence ×: Many occurrences (c) Adhesiveness In dry spinning of polyurethane fiber, the oil agent shown in Table 1 was applied by roller oiling so that the oil agent adhesion amount became 6% based on the filament weight. Let the cheese roll at 600m / min,
A 40D polyurethane fiber was obtained. After aging the wound cheese for one week, when the yarn was sent out at a speed of 50 m / min using a drawer / winder of variable magnification and the yarn was fed at a speed of 50 m / min, the minimum magnification at which the yarn could be wound without being entangled due to sticking was shown. 1.3 or less is preferable. (D) Antistatic property Using the fiber used for the adhesive property, the static electricity generated by warping at a warping speed of 600 m / min was measured using a warping machine manufactured by Kaar Mayer (DSE-H). 0.5 kv or less is preferable.

[0032]

[Table 2]

As is clear from the performance evaluation results of Examples 1 and 2 in Table 2, the oil containing the ether-modified polysiloxane of the present invention is excellent in aging stability, antistatic property and anti-sticking property. I understand. On the other hand, Comparative Example 1 (oil agent composed only of dimethylpolysiloxane), Comparative Example 2 (oil agent containing dimethylpolysiloxane and phosphate), and Comparative Example 3 (oil agent containing dimethylpolysiloxane, mineral oil and phosphate, and metal soap) No oil agent) satisfies all performance criteria.

[0034]

Conventionally, in producing polyurethane fibers, there has been adopted a method of using an oil agent in which dimethylpolysiloxane, phosphate and metal soap are blended to prevent static and prevent sticking between yarns. When treated with an oil containing such an agent, the stability of the oil over time is poor, and a precipitate or the like is generated, so that it is not possible to obtain long-term stable operability such as uneven adhesion to yarn. However, when manufactured using an oil agent for elastic fibers containing the ether-modified polysiloxane of the present invention, the oil agent itself has excellent aging stability and antistatic properties, and also has excellent anti-sticking properties between yarns, Furthermore, since scum is less generated on the yarn path, polyurethane elastic fibers can be produced from spinning in a post-processing step while maintaining stable operability for a long period of time.

Claims (3)

[Claims] An oil agent for elastic fibers comprising an ether-modified polysiloxane represented by the following general formula (1). Embedded image (Wherein, R ¹ is a monovalent hydrocarbon group and may be the same or different; R ² is an alkylene group having 1 to 4 carbon atoms; O
A is an oxyethylene group and / or an oxypropylene group; R ³ is a monovalent hydrocarbon group which may be the same or different; m is a number of 1 or more; n is a number of 1 to 20;
A number from 0 to 50, and q represents a number from 0 to 5. ) 2. The composition according to claim 1, wherein said ether-modified polysiloxane, diorganopolysiloxane and / or mineral oil are contained, and said ether-modified polysiloxane has a content of 0.01%.
The oil agent for elastic fibers according to claim 1, wherein the content of diorganopolysiloxane and / or mineral oil is 50 to 99.9% by weight. 3. The method of claim 1, wherein said ether-modified polysiloxane has a viscosity of 10 to 20,000 square millimeters per second.
Or the oil agent for elastic fibers according to 2.