JP3265081B2 - Cationic dyeable polyvinyl chloride 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 polyvinyl chloride fiber which can be dyed with a cationic dye. More specifically, the present invention relates to a cationic dye-dyeable polyvinyl chloride fiber having a good washing fastness and containing a compound having a sulfonate group having a specific structure.

[0002]

2. Description of the Related Art Since a polyvinyl chloride fiber has no dyeing seat, as is apparent from its chemical structure, it is bonded to the dyeing seat by the action of polar groups such as acid dyes, cationic dyes and direct dyes. Dyes cannot be dyed with these dyes, and dyeing with disperse dyes or azo dyes is only marginally achieved. In addition, since ordinary polyvinyl chloride fibers shrink when the dyeing temperature is raised, they need to be dyed at 60 to 80 ° C. near the glass transition point. There is a problem that only dyeing can be performed and washing fastness is low.

As a method for solving this problem, a method of copolymerizing a compound having a functional group which can serve as a dyeing site for a cationic dye can be considered, but copolymerization is extremely difficult due to poor reactivity of vinyl chloride. However, it has not been put to practical use because its physical properties are reduced and its cost is high.

[0004] Therefore, in the case of coloring into a medium-dark color, a method of adding a dye or pigment to a polymer and mixing and spinning (originating) has heretofore been adopted, but the production loss is large and it is difficult to make small turns. There is a problem, and improvement of dyeability by post-dyeing is keenly desired.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and an object of the present invention is to provide a polyvinyl chloride fiber which can be dyed by post-dyeing using an ionic dye.

[0006]

Means for Solving the Problems The present inventors have conducted intensive studies to achieve the above object, and as a result, a specific sulfonate compound having a benzenesulfonate group as a functional group has been obtained.
Polyvinyl chloride has good solubility in the spinning solution at the time of spinning, and can be stably spun.Furthermore, the obtained fiber can be dyed in a deep color with a cationic dye and the washing fastness of the dyed material is also good. The inventors have found that there is a certain thing, and as a result of further study, have reached the present invention.

According to the present invention, there is provided a polyvinyl chloride fiber containing an alkylbenzene sulfonate represented by the following general formula (I), wherein the content of the sulfonate group in the fiber is 20 to 200 mmol / kg. A cationic dye-dyeable polyvinyl chloride fiber is provided.

[0008]

Embedded image

Wherein R represents an alkyl group, M represents a metal, an ammonium group or a phosphonium group. ] The sulfonate compound to be contained in the polyvinyl chloride fiber of the present invention is:
It is important that the alkylbenzene sulfonate represented by the above general formula (I) is used, and it is preferable that the sulfonate group is directly bonded to the aliphatic hydrocarbon group because the dyeing property to the cationic dye becomes insufficient. Absent.

In the above formula (I), R is an alkyl group,
In particular, those having 8 to 16 carbon atoms are preferable because of good compatibility with polyvinyl chloride, and those having less than 8 carbon atoms are liable to fall off at the time of dyeing and tend to cause spotting.
On the other hand, when it exceeds 16, the compatibility with polyvinyl chloride becomes poor, the dispersion becomes difficult, and the spinnability during spinning tends to decrease. M represents a metal, an ammonium group or a phosphonium group, and particularly when M is an ammonium group or a phosphonium group, a tertiary or quaternary substituted with a hydrocarbon group having 6 or less carbon atoms by 3 or 4; Are preferred. Specifically, M
Is a metal, examples thereof include alkali metals such as lithium, sodium and potassium, and sodium is particularly preferred. When M is an ammonium group, tetra-n
Quaternary ammonium groups such as butyl ammonium groups,
Examples include tertiary ammonium groups such as triisopropyl hydrogen ammonium group.
Is a phosphonium group, examples thereof include a tetra-n-butylphosphonium group, a tri-isopropylphenylphosphonium group, and a triisopropylhydrogenphosphonium group.

Examples of such alkylbenzene sulfonates include sodium dodecylbenzenesulfonate,
Examples thereof include tetra-n-butylphosphonium dodecylbenzenesulfonate, and among them, sodium alkylbenzenesulfonate such as sodium dodecylbenzenesulfonate is preferable from the viewpoint of availability.

The content of the sulfonate compound described above in the polyvinyl chloride fiber is such that the content of the sulfonate group is in the range of 20 to 200 mmol, preferably 50 to 100 mmol per 1 kg of the fiber weight. Needs to be If the content is less than 20 mmol / kg, the dyeing properties for cationic dyes will be insufficient.
When the amount exceeds 0 mmol / kg, the dyeability of the cationic dye becomes good, but the content of the sulfonate compound needs to be increased. It is not preferable because the yarn property also decreases.

The incorporation of the sulfonate compound into the polyvinyl chloride fiber can be carried out at any stage prior to spinning the polyvinyl chloride fiber. For example, when preparing a dope for spinning by dissolving polyvinyl chloride powder in a solvent, or dissolving the sulfonate compound simultaneously,
Generally, a method of mixing a sulfonate compound dissolved in a solvent with a dope of polyvinyl chloride is used. At this time, it is necessary to use a solvent which does not cause precipitation of polyvinyl chloride or the sulfonate compound even when added to a solution of polyvinyl chloride as a solvent for the sulfonate compound to be used. Is a preferred example.

The dope containing the sulfonate compound thus obtained can be made into a fiber by a conventionally known dry spinning method or wet spinning method. If necessary, optional additives such as a plasticizer, a matting agent, an anti-coloring agent, a flame retardant, an antioxidant, an antistatic agent, and inorganic fine particles may be added.

Next, when dyeing the polyvinyl chloride fiber of the present invention, although the dyeing rate sharply increases at a dyeing temperature of 80 ° C. or higher, the shrinkage starting temperature of the polyvinyl chloride fiber is about 80 ° C. The dyeing temperature must be about 80 ° C. or less, preferably about 60 ° C. For this reason, even if the dyeability is improved by blending a large amount of a sulfonate compound, it is difficult to dye in a dark color, and it is preferable to use a carrier at the time of dyeing. Carriers preferably used include, for example, chlorobenzenes,
Methyl salicylates, methyl naphthalenes and the like are mentioned, and specifically, dichlorobenzene, trichlorobenzene, Celizalon T and Polyesca T manufactured by Nikka Chemical Co., Ltd. are preferably used. The preferred use amount of such a carrier is in the range of 5 to 10% (owf) based on the weight of the fiber.

[0016]

The polyvinyl chloride fiber of the present invention is blended with a specific sulfonate compound having a benzenesulfonate group having a good affinity for a cationic dye. It can be beautifully dyed, and when used in combination with a carrier, an extremely high dyeing rate can be achieved and it can be easily dyed dark.

Further, it is presumed that the sulfonate compound used in the present invention has a moderately good affinity for polyvinyl chloride, which deteriorates the spinnability at the time of spinning and the physical properties of the fiber obtained. In addition, the dyeability is improved, the dye is less likely to drop off or migrate during washing, and the washing fastness is excellent.

Further, according to the present invention, since dyeing can be carried out by post-dyeing, loss between colors which has conventionally occurred at the time of color change in the soaking method can be eliminated, and small lot production is possible.

[0019]

The present invention will be described in more detail with reference to the following examples. In addition, dyeing | staining was performed on condition of the following, and the measurement of the dyeing rate followed the following. Dyeing conditions Cationic dye (Estrol Navy Blue N-2RL): 2.0% owf Carrier agent (Celizaron T # 1 manufactured by Nichika Chemical Industry): 7.5% owf Bath ratio: 1:50 Dyeing temperature × time: 60 ° C. × 60 min. Dyeing ratio The absorbance of the dyeing solution before and after dyeing was measured and calculated from the absorbance at 600 mμ.

[0020]

Example 1 Polyvinyl chloride 35 having an average degree of polymerization of 1000
Parts, a solvent having a mixing ratio of acetone / benzene of 50/50 (weight ratio): 65 parts, and an alkylbenzenesulfonate shown in Table 2 in a ratio of 100 mmol / kg were mixed. 100 ℃ after dry spinning at 100 ℃
The film was drawn 5 times at a temperature of 100 ° C. to obtain 100 denier / 25 filaments of polyvinyl chloride fiber. Table 1 shows the results of dyeing the obtained fibers.

[0021]

[Table 1]

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) D01F 6/48 D01F 1/10

Claims (2)

(57) [Claims] 1. A polyvinyl chloride fiber containing an alkylbenzene sulfonate represented by the following general formula (I), wherein the content of the sulfonate group in the fiber is 20 to 20.
A cationic dye-dyeable polyvinyl chloride fiber, which is 0 mmol / kg. Embedded image [In the formula, R represents an alkyl group, M represents a metal, an ammonium group, or a phosphonium group. ] 2. The method according to claim 1, wherein the sulfonate compound has 8 or more carbon atoms.
The cationic dye-dyeable polyvinyl chloride fiber according to claim 1, which is sodium alkylbenzene sulfonate having 6 or less alkyl groups.