JP2784635B2 - Oil agent for elastic fiber - Google Patents

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,
More specifically, when producing polyurethane elastic fiber, an oil agent for obtaining a polyurethane elastic fiber having excellent unwinding properties, with less occurrence of sediment (scum) falling off on guides and the like during yarn running, less adhesiveness between fibers, and less. About.

[0002]

2. Description of the Related Art Conventionally, methods for producing polyurethane elastic fibers include melt spinning, dry spinning, and wet spinning. However, any of these methods has a large adhesive property between the fibers, and thus is unwound in a post-processing step. Poor sex is a problem.

[0003] As a method of preventing the sticking, a method of applying solid fine particles such as talc, silica, colloidal alumina or the like to the fiber as an aqueous or oily slurry, a method of dispersing a metal salt powder of a higher fatty acid in water or mineral oil ( JP-B-41-286), a method mainly based on a releasing effect, a monoamine compound (JP-B-46-16312), a diamine compound (JP-B-60-44425), and an amino group having a branched chain of polydimethylsiloxane. A base having a reactive functional group, such as amino-modified silicon having a group added thereto (Japanese Patent Publication No. 63-8233), is blended with mineral oil or dimethylpolysiloxane to deactivate active isocyanate groups on the yarn surface. Thus, a method for preventing self-adhesion between fibers has been proposed.

[0004] However, in the former, solid particles are used, so that sediment (scum) is often found on the yarn path, and also in the latter, a reaction product with an isocyanate group accumulates as a sediment (scum) on the yarn path. There is a problem.

[0005]

Accordingly, an object of the present invention is to provide a method for producing a polyurethane elastic fiber,
In order to provide an oil agent for polyurethane elastic fibers that improves scum generation in spinning and post-processing steps, prevents sticking of fibers on cheese and improves unwinding properties, and provides good operability in spinning and post-processing steps. is there.

[0006]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies on the production of polyurethane elastic fibers in order to obtain an oil agent for fibers that produces less scum in the post-processing step after spinning. It has been found that the above problem can be solved by attaching an oil agent to the fibers, and the present invention has been achieved.

That is, the present invention is mineral oil and / or the diorganopolysiloxane of the general formula (1) and the general formula
The present invention relates to an oil agent for elastic fibers, which comprises an alkoxysilane represented by (2) .

[0008]

[0009] (wherein, R1 is an alkyl group having 1 to 10 carbon atoms, alkyl groups of R2 are C1-20; is Y1 amino
Alkyl group, N-β (aminoethyl) -γ-iminopro
Pill group and N-phenyl-γ-iminopropyl group
A group having at least one group; Y2 is aminoalkyl
Group, N-β (aminoethyl) -γ-iminopropyl group,
N-phenyl-γ-iminopropyl group, γ-glycidyl group
Cypropyl group, β- (3,4-epoxycyclohexyl
L) at least one of the ethyl groups, or
At least one of a oxy group, a hydroxyl group and a carboxyl group
A group having one kind of group ; l and n are integers of 1 or more, m is an integer of 0 or more, and 1 + m + n = 4. )

The mineral oil used in the present invention includes:
The viscosity of the entire blended oil is 100 centistokes (hereinafter cs)
(Abbreviated as t)
Usually, those having 5 to 30 cst are preferable. 5 cst viscosity
If it is less than 3, volatility tends to be high and adhesion to yarn tends to be difficult, and if it exceeds 30 cst, solubility with various oil components tends to be difficult.

The diorganopolysiloxane used in the present invention includes dimethylpolysiloxane and those obtained by substituting some of the methyl groups of dimethylpolysiloxane with other alkyl groups or phenyl groups. In any case, any one may be selected as long as the viscosity of the whole blended oil is 100 cst or less, but usually 3 to 30 c
st's are preferred. If the viscosity is less than 3 cst, the volatility tends to be high and adhesion to the yarn tends to be difficult. If the viscosity exceeds 30 cst, the solubility with various oil components tends to be difficult.

The alkoxysilanes have the general formula (1)
In formula (I), R1 is usually a linear or branched alkyl group having 1 to 10 carbon atoms (methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group, nonyl group, Decyl group, isopropyl group, isobutyl group, 2-ethylhexyl group, etc.). Preferred of the groups represented by R1 are
It is a linear or branched alkyl group having 1 to 5 carbon atoms.

R2 is usually a linear or branched alkyl group having 1 to 20 carbon atoms (methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl). , Decyl group, undecyl group, 2-ethyldecyl group, dodecyl group, tridecyl group,
Tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group, octadecyl group, nonadecyl group, eicosyl group, isopropyl group, isobutyl group, 2-ethylhexyl group, etc.). Among these groups represented by R2, preferred are linear or branched alkyl groups having 1 to 10 carbon atoms.

[0014]Represented by Y1 and Y2Isocyanate
Reactive groups that react with are amino groups, imino groups,
Poxy group, At least one of hydroxyl group, carboxyl group, etc.
And a group having one type of group. Of these reactive groups
Among them, amino is preferable because it has good adsorptivity with the fiber surface.
Group, imino group, epoxy group It is.

The groups represented by Y1 and Y2 include a group having a hydrocarbon chain (aminoalkyl group, N-β (aminoethyl) -γ-iminopropyl group,
N-phenyl-γ-iminopropyl group, γ-glycidoxypropyl group, β- (3,4-epoxycyclohexyl) ethyl group etc) Is mentioned.

[0016]

[0017]

[0018]

[0019]

Specific examples of the alkoxysilanes in the present invention include, for example, N-β (aminoethyl) -γ-iminopropyltrimethoxysilane, N-β (aminoethyl) -γ-iminopropylmethyldimethoxysilane, γ
-Aminopropyltriethoxysilane, N-phenyl-
γ-iminopropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, β- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, And the like, but are not limited thereto.

Further, by containing at least one of polyether-modified silicon, amino-modified silicon, amide-modified silicon and silicone resin, the adhesiveness between fibers can be reduced and the unwinding property can be improved.
The effect of the oil agent of the present invention increases.

The polyether-modified silicon usually refers to one in which a polyether chain is bonded to a molecular chain of dimethylpolysiloxane, such as those having a polyether chain position as a main chain, a side chain, or a terminal group. .

The amino-modified silicon usually refers to a dimethylpolysiloxane in which an amino group or an imino group is bonded to a molecular chain of the dimethylpolysiloxane.
Those having as a terminal group are exemplified.

As the amide-modified silicon, for example, the amino group of the above-mentioned amino-modified silicon and a group having 1 to 25 carbon atoms are used.
Amidated product obtained by reacting the above with a fatty acid or a derivative thereof.

Examples of the silicone resin include a polymer having a three-dimensional structure obtained by co-hydrolyzing and polymerizing an organosilane.

The viscosity of the oil agent containing the alkoxysilanes of the present invention is adjusted so that uniform adhesion and prevention of wrapping around the roller can be achieved.
It is preferably 100 cst or less at 25 ° C.

The content of the alkoxysilanes of the present invention is
Any amount may be blended as long as the viscosity of the whole blended oil is 100 cst or less, but usually 0.01 to
It is 15% by weight, preferably 0.1 to 8% by weight. If the content is less than 0.01% by weight, the scum prevention effect is not remarkable, and if it exceeds 15% by weight, it tends to be difficult to control the viscosity of the entire oil agent.

The content of polyether-modified silicon, amino-modified silicon, amide-modified silicon, and silicone resin may be arbitrarily set as long as the viscosity of the compounded oil is 100 cst or less. 0.1
-20% by weight, preferably 0.1-10% by weight. If the content is less than 0.1% by weight, the effect of enhancing adhesion prevention is not remarkable, and if it exceeds 20% by weight, viscosity control of the entire oil agent tends to be difficult.

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 ordinary temperature such as paraffin and polyethylene. Solid wax or the like, or a binder, such as alcohols or fatty acid esters, may be additionally blended to such an extent that the performance of the alkoxysilanes of the present invention is not impaired, and the addition can increase the anti-sticking effect. Further, components commonly used in spinning oils, such as antistatic agents, antioxidants, and ultraviolet absorbers, can be added.

The oil agent of the present invention can be applied to the yarn by roller lubrication or nozzle lubrication at any position after spinning and before winding the yarn in the polyurethane fiber spinning process. The oil agent of the present invention is generally added to the polyurethane elastic fiber in an amount of 0.5 to 10% by weight, preferably 1 to 8% by weight.

[0031]

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 test methods for scum generation and stickiness of the yarns obtained in Examples and Comparative Examples provided with the oil agent are as follows. (A) Generation of scum In the melt spinning of the polyurethane fiber, the oils shown in Table 1 were applied by roller lubrication so that the amount of the oils applied was 6% based on the weight of the filaments, and wound around cheese at 300 m / min. 24 hours after the start of spinning, the presence or absence of scum on the yarn path was visually determined. -Evaluation criteria- ○: No occurrence △: Yes ×: Many occurrences (b) Adhesiveness The yarn was unwound from the wound cheese at a speed of 10 m / min.
The unwinding tension was measured. The smaller the unwinding tension, the smaller the adhesiveness between the yarns. Table 1 shows the results.

The following alkoxysilanes and modified silicon in Table 1 were used. A-1: N-β (aminoethyl) -γ-iminopropyltrimethoxysilane A-2: N-phenyl-γ-iminopropylmethyldiethoxysilane A-3: γ-glycidoxypropyldiethoxysilane

Amino-modified silicon: KF-861
(Shin-Etsu Chemical Co., Ltd.) Polyether-modified silicon: KF-351 (Shin-Etsu Chemical Co., Ltd.) Amide-modified silicon: BY16-891 (Toray
Dow Corning Co., Ltd.) Silicone resin: SR2400 (Toray Dow Corning Co., Ltd.)

[0035]

[Table 1]

As is evident from Table 1, it is found that the oil agent containing the alkoxysilane of the present invention significantly reduces scum generation. In particular, it can be seen that, even though it has an anti-sticking effect, even when it contains amino-modified silicon, which has been pointed out as having a problem of scum generation, scum generation can be reduced by the inclusion of alkoxysilanes. Also,
It can be seen that Examples 1 to 4 of the present invention also have an anti-adhesion property equal to or higher than that of the conventional oil agent in terms of the anti-adhesion property.

[0037]

Conventionally, when a polyurethane fiber is produced, if it is treated with an oil agent containing an agent for preventing sticking between yarns, scum is generated in a post-processing step from spinning, and stable operability is obtained. Could not. But,
When produced using the oil agent for elastic fibers containing the alkoxysilanes of the present invention, since scum generation on the yarn path is small and the anti-sticking property between the yarns is excellent, the polyurethane elastic fiber is produced by spinning. It can be manufactured while maintaining stable operability in the post-processing step.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) D06M 13/00-15/715

Claims (3)

(57) [Claims] An oil agent for an elastic fiber, comprising a mineral oil and / or a diorganopolysiloxane and an alkoxysilane represented by the general formula (1). (Wherein, R1 is an alkyl group having 1 to 10 carbon atoms; R2 is an alkyl group having 1 to 20 carbon atoms; Y1 is an aminoalkyl group;
N-β (aminoethyl) -γ-iminopropyl group, N-
At least one of the phenyl-γ-iminopropyl groups
Such groups; is l and n 1 or more integer, m represents an integer of 0 or more, which is l + m + n = 4. ) 2. Mineral oil and / or diorganopolicy
Loxane and alkoxysilane represented by general formula ( 2 )
An oil agent for elastic fibers, characterized in that the oil agent contains an oil. (Wherein, R 1 is an alkyl group having 1 to 10 carbon atoms; R 2 is a carbon
An alkyl group having a prime number of 1 to 20; Y2 is an epoxy group, hydroxyl
Having at least one of a carboxyl group and a carboxyl group
L and n are integers of 1 or more; m is an integer of 0 or more
And l + m + n = 4. ) 3. The oil agent for elastic fibers according to claim 1, further comprising at least one of polyether-modified silicon, amino-modified silicon, amide-modified silicon, and silicone resin.