JP2702244B2 - Oil agent for polyurethane elastic fiber - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a treating agent for producing a polyurethane elastic fiber.

2. Description of the Related Art Conventionally, polyurethane elastic fibers have been produced by a method such as a melt spinning method, a dry spinning method, or a wet spinning method. When the bobbins are unwound, large tension fluctuations occur when unwinding the bobbins, which is a main cause of yarn breakage in the post-processing step. Many proposals have been made on the method of spinning this sticky. (Japanese Patent Publication No. 41-286, Japanese Patent Publication No. 40-5557, Japanese Patent Publication No. 45-4
No. 0719, JP-A-48-19893, JP-A-57-12827
No. 0 publication).

Typical examples are dispersions of metal soaps in mineral oil and / or polyorganosiloxane, and dispersions of polymer liquid components such as polyoxyalkylene-modified silicone oils (random polymers) instead of metal soaps, amines A method of adhering an oil agent that deactivates a reactive group of a filament by blending components has been practiced. Furthermore,
The essential properties of polyurethane elastic fibers are that they have a lower Young's modulus and are more easily stretched than other fibers for clothing (nylon, polyester, etc.). This point is a unique property compared to other fibers, so it is a very advantageous property, but has the drawback of abnormally increasing the frictional resistance of guides and the like in post-processing steps such as warping and knitting. Has become.

This frictional resistance is due to the fiber at high speed (100-1000m / min).
Friction resistance with metal (F / Mμd), fiber-ceramic, etc., and fiber-fiber (F / F) at ultra-low speed (0.1-10m / min)
μs) and fiber-metal (F / M μs).

F / Mμd is important to reduce troubles (yarn breakage, single yarn breakage, weave spots, etc.) in knitting and weaving processes using polyurethane elastic fiber, and the quality of knitted and woven fabrics (quality ...
F / Fμs, F / Mμ
s is a very important item.

Conventionally, polyether-modified silicone oil and metal soap have been used to reduce the F / F μs and F / M μs to improve the quality of the knitted fabric. Typical examples of conventionally used polyether-modified silicone oils include silicone L-7001 manufactured by UCC, silicone SF-8410 manufactured by Toray Silicone, and silicone SP-3711 manufactured by Shin-Etsu Chemical Co., Ltd. These have the general formula: The oxyalkylene group or the polyoxyalkylene ether group is randomly bonded in the dimethylsiloxane skeleton as shown in, and as a result, the compatibility with the base oil is low, and the F / Fμs and F / Mμs are reduced. If a sufficient amount of silicone oil is to be used, a binder for increasing the compatibility between the base oil and the silicone oil is indispensable. Conventionally, esters such as dioctyl phthalate and alcohols such as isostearyl alcohol have been used as the binding agent in an amount of about 10 to 30%. These components have an action such as swelling or yellowing on the polyurethane fiber. Therefore, they are not preferable (for example, JP-B-53-81798, JP-B-51-3).
No. 7998).

Problems to be Solved by the Invention The present invention provides an oil agent for polyurethane elastic fibers that does not use any of the above-mentioned binders, or that can significantly reduce the amount of use thereof, whereby swelling, discoloration, etc. of the polyurethane elastic fibers are provided. Problems and dignity in textiles,
The purpose is to solve problems such as transmuscular.

Means for Solving the Problems The present invention provides (1) a base treating agent, and (2) a general formula [I] [Wherein, R is a divalent hydrocarbon group having 2 to 6 carbon atoms, M is a hydrogen atom, a hydrocarbon group, an alkylamino group, or an acyl group, n = 50 to 150, x = 0 to 10, y = 0 to 10 (x and y do not become 0 at the same time)] and an oil agent for polyurethane elastic fibers having an oil agent viscosity of 50 centistokes or less at 30 ° C.

The polyetheralkyl-modified silicone oil used in the present invention is different from the polyetheralkyl-modified silicone oil conventionally used for this kind of purpose, in that both ends of the polydimethylsiloxane skeleton have an oxyalkylene group or a polyoxyalkylene ether group-modified group. This makes it possible to completely eliminate or significantly reduce the conventionally required binder.

In the polyetheralkyl-modified silicone oil used in the present invention, the dimethylpolysiloxane skeleton preferably has n = 50 to 150, more preferably 70 to 130. When n is less than 50, the molecular weight of this component becomes small, so there is no effect of improving the fabric quality (warping), and n is 15
When it is larger than 0, the compatibility with the base oil is reduced, and when the required amount is blended, the stability is reduced. Some of the methyl groups that constitute dimethylsiloxane may be modified with alkyl groups, phenyl groups, or the like. The polydimethylpolysiloxane containing such a modifying group is also included in the polydimethylsiloxane of the present invention.

R interposed between both ends of the polydimethylsiloxane and the oxyalkylene group is an alkyl group having 2 to 6 carbon atoms,
Usually, 3 to 4 alkyl groups are used.

In the present invention, the (poly) oxyalkylene group is bonded to both terminals of the polydimethylsiloxane as described above and is an adduct of ethylene oxide or propylene oxide, and both may be bonded independently, or both May form a random or block polymer. x and y are each independently a number from 0 to 10, but x and y are not simultaneously zero. Further, x or y of the oxyalkylene groups at both terminals may not be the same. The preferred ranges of x and y are x: 2-8, y: 3-9, particularly preferably the polyoxypropylene / polyoxyethylene copolymer (POEO) chain, especially the molar ratio of the former to the latter.
1 / 0.3 to 1/6. The molecular weight of the POEO chain is 100
~ 1000, especially 400-800 are preferred. The R, R, POEO, molecular weight and the like of the polyether-modified silicone oil having a block at both ends represented by the general formula [I] are determined by the type, viscosity and blending amount of the base treating agent used, and the viscosity of the target oil agent for polyurethane elastic fiber. It may be appropriately selected in consideration of the above.

The terminal of the polyoxyalkylene chain may be a hydrogen atom, but is blocked with an appropriate group, for example, a hydrocarbon group such as an alkyl group or a phenyl group, an acyl group such as an acetyl group or a propionyl group, or an alkylamino group. You may. As a special example, it may be partially or completely esterified with succinic acid, maleic acid, phthalic acid or the like. Further, the chain may be extended with a polyisocyanate. Particularly preferred are those blocked with an alkylamino group and those blocked with an ester such as succinic acid or maleic acid.

The polyether alkyl-modified silicone oil of the present invention has a molecular weight of 7,500 to 9,700, preferably about 8,300 to 9,100, and a viscosity of 150 to 300 cps (30 ° C.).
A degree is preferable and is insoluble in water.

The polyether-modified silicone oil of the present invention is preferably incorporated in an amount of 0.1 to 5% by weight, more preferably 0.2 to 3 parts by weight, based on the total amount of the oil agent for fibers.

As the base treating agent used in the present invention, mineral oil, polyorganosiloxane, natural or synthetic esters, and compounded oils containing these as a main component, such as those conventionally used as fiber lubricants, can be used. Although usable, particularly useful base treating agents for the present invention are mineral oils and / or polyorganosiloxanes alone or blended oils based on these.

As the mineral oil, any oil may be used as long as the viscosity of the oil agent for polyurethane elastic fibers is 50 centistokes or less at 30 ° C., but usually the viscosity of the mineral oil itself is 4%.
A low viscosity oil of about 20 cs is desirable from the viewpoint of reducing the friction of the fiber. In particular, purified liquid paraffin is preferable since it does not cause the polyurethane elastic fibers to yellow and swell.

The polyorganosiloxane is most preferable because polydimethylsiloxane is a general-purpose product. However, a part of this methyl group may be substituted with another monovalent organic group such as another alkyl group or phenyl group. The viscosity may be arbitrary as long as the viscosity of the oil agent for polyurethane elastic fibers is not more than 50 cs at 30 ° C., as in the case of the mineral oil.
A low viscosity of about 20 cs is desirable for the same reason as mineral oil.

A mixture of mineral oil and polyorganosiloxane may be used, and the ratio is not limited.

The amount of the base treatment agent is preferably the total amount of the oil agent for fibers.
It is 50 to 99% by weight, more preferably 60 to 99% by weight.

The oil agent of the present invention may further contain an anti-stick agent, a binder, an antistatic agent and the like.

Examples of the anti-stick agent include metal soaps and modified silicone oils.

As the metal soap, aluminum stearate, zinc stearate, magnesium stearate and the like are generally used. Among them, magnesium stearate is often used because it has excellent anti-sticking and excellent smoothness. The amount used is desirably 5% or less of the total amount of the base treating agent from the viewpoints of crude oil stability, scum, anti-sticking properties and the like.

Examples of the modified silicone oils include alkyl-modified siloxane resins, amino-modified silicones, carboxy-modified silicones, and polyoxyalkylene-modified silicone oils. The content of these modified siloxanes is suitably 5% by weight or less based on the total amount of the base treating agent.

In the present invention, the use of a binder (homogenizing agent) is not always necessary, but the type of the pacing agent which is compatible with or mixed with other components and the polyether alkyl-modified silicone oil of the present invention represented by the general formula [I] Depending on the type and required blending amount, it may still be desirable to use a small amount of a binder. Even in such a case, the amount of use can be significantly reduced compared to the related art. The preferred amount of the binder is 0 to 20% by weight, especially 0 to 20% by weight based on the total amount of the treating agent.
5% by weight.

Examples of the binder include alcohols such as hexadecyl alcohol and octadecyl alcohol; esters such as dioctyl sebacate, dilauryl phthalate, isooctyl stearate and isopropyl myristate. Hereinafter, the present invention will be described with reference to examples.

Example A commercially available polyurethane elastic yarn (14de) was continuously degreased by an ultrasonic cleaning method using n-hexane to produce a no-oil yarn, and then an oil agent having the following composition (an oil agent for polyurethane elastic fiber) was used as a filament weight. About 5%.

Oil agent A (invention) 13cs mineral oil 10 10cs polydimethylsiloxane 86 Magnesium stearate 2 Inventive modified silicone oil 2 (oil agent viscosity 10.7cs, 30 ° C) Oil agent B (invention) 10cs mineral oil 42.5 20cs polydimethylsiloxane 35 phthalate Acid ester 15 Polyoxyalkylene modified 2 Silicone (random type) Polyether alkyl modified 5 Silicone resin Modified silicone oil of the present invention 0.5 (Oil viscosity 16.8 cs, 30 ° C) Oil C (Invention) 10 cs Polydimethylsiloxane 90 Polyether alkyl modified 4.5 Silicone resin Isostearyl alcohol 5 Modified silicone oil of the present invention 0.5 (Oil viscosity 9.2 cs, 30 ° C) Oil D (Invention) 20cs polydimethylsiloxane 98 Modified silicone oil 1 of the present invention 1 (Oil viscosity 17.1cs, 30 ° C) Oil E (Comparative example) 13cs mineral oil 10 10cs polydimethylsiloxane 88 Magnesium thearate 2 (oil viscosity 10.5cs, 30 ° C) Oil F (comparative example) 10cs mineral oil 43 20cs polydimethylsiloxane 35 phthalate 15 polyoxyalkylene modified 2 silicone (random type) polyetheralkyl modified 5 silicone resin ( Oil viscosity 16.7 cs, 30 ° C) Oil G (comparative example) 10cs polydimethylsiloxane 90 polyether alkyl modified 5 Silicone resin Isostearyl alcohol 5 (oil viscosity 9.5cs, 30 ° C) Oil H (comparative example) 20cs polydimethylsiloxane 96 magnesium stearate 4 (oil viscosity 17.7cs, 30 ℃) R = C 3 - C 5 alkyl group; PO / EO = 2/3 ( molar ratio) PO / EO MW = 248 R = C 3 C 5 alkyl group; PO / EO = 4/6 (molar ratio) PO / EO MW = 500 R = C ₃ alkyl group; PO / EO = 5/1 (molar ratio) PO / EO MW = 330 R = C ₂ C ₆ alkyl group; PO / EO = 5/5 (molar ratio) PO / EO MW = 510 If the ratio are both heavier. Also,
The viscosity of all the blended oils was 50 cs or less. The oil composition of the present invention is not limited to the formulations described in the above examples.

Measurement method Measure according to the figure below and calculate from the measurement chart obtained.

Hang the running yarn at right angles to the friction body, and load one end (T1 = 7g)
, Fix the other end to the U gauge, and set the U gauge to 30 mm / m
It moves in and measures the frictional force (μs) generated between itself and the friction body and the stick slip (R).

EFFECT OF THE INVENTION The double-ended polyether-modified silicone oil represented by the general formula [I] can be used to obtain F / Fμs and F / Mμs without using metal soap or the like.
Can be reduced, the quality of the woven fabric in the post-processing step can be improved, and a uniform oil agent can be obtained, so that the operability is greatly improved.

In addition, it can be uniformly mixed with mineral oil, dimethylpolysiloxane, etc., which are the base components of the treating agent, without using a binder. Reduction, eg, yellowing, swelling, etc., can be prevented.

Claims (3)

(57) [Claims] (1) a base treating agent, and (2) a general formula [I] [Wherein, R is a divalent hydrocarbon group having 2 to 6 carbon atoms, M is a hydrogen atom, a hydrocarbon group, an alkylamino group, or an acyl group, n = 50 to 150, x = 0 to 10, y = 0 to 10 (x and y do not become 0 at the same time)] An oil agent for a polyurethane elastic fiber having an oil agent viscosity of 50 centistoke or less at 30 ° C containing a polyetheralkyl-modified silicone oil represented by the formula: 2. A (poly) oxyalkylene chain having a molecular weight of 44
The oil agent for polyurethane elastic fibers according to claim 1, wherein 3. The polyurethane elastic fiber oil preparation according to claim 1, wherein the polyether alkyl-modified silicone oil of the general formula [I] is contained in an amount of 0.1 to 10% by weight based on the whole oil preparation.