JPH026661A - Oil fouling remover for fiber - Google Patents

Abstract

PURPOSE:To obtain the subject remover excellent in the ability to remove oil fouling sticking and remaining on a gray fabric and sewed product by blending an oil-soluble anionic surfactant with oil-soluble nonionic surfactant, amphiphatic substance and solvent. CONSTITUTION:An oil fouling remover obtained by blending an anionic surfactant, expressed by the formula (n is 0-10; R1 is 6-20C alkyl; R2 is 2-4C alkylene oxide residue; M is alkali or alkaline earth metal, alkanolamine, ammonium, etc.), a nonionic surfactant both having extremely strong solvency for oils, especially a surfactant having a narrower molecular weight distribution than that of normal polyoxyakylene alkyl ether type nonionic surfactant and a mixture thereof, an amphiphatic substance (e.g., n-butanol), such as 3-10C alcohol, and a solvent (e.g., petroleum-based hydrocarbon and alkyl halide). The above- mentioned remover has high ability to remove oil fouling from fiber and enables homogeneous dyeing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an agent for removing oil stains from textiles, and more specifically to a lubricant used during the process of gray fabrics made from looms, knitting machines, etc. and sewn products thereof. If the dye or other machine oil adheres and remains as an oil stain on the fiber, it is added to the fiber oil stain remover used in the pre-treatment process for the subsequent dyeing and finishing process.

It is known that the oil adhering to the fibers causes yellowing of the oil-adhered area when the woven fabric is stored for a long period of time, or causes uneven dyeing in the subsequent dyeing process.

The present invention aims to remove such adhered oil during a series of dyeing steps by applying a small amount onto the adhered oil and removing it completely, thereby obtaining a homogeneous dyed product.

[Prior art and its problems] There are already chemicals that can be applied in small amounts to remove oil stains on textile fabrics for the above purpose, but at present, the ability to remove the oil stains is insufficient, or it is difficult to remove oil to a certain extent. Even if it is removed, the current situation is that the applied oil stain remover may cause uneven dyeing during the dyeing process as a secondary problem.

Another method for removing oil stains is to spray an organic chlorine solvent onto the oil stain using a spray can, but this method causes problems such as shifting the weave of the fabric, damaging the fabric surface, and problems under the Industrial Safety and Health Act. ing. Furthermore, it is also possible to remove the stain by hand washing with detergent, but this has drawbacks in terms of work efficiency.

Means for Solving Problem 1] In order to solve these problems, the present inventors have conducted extensive studies and completed the present invention.

As mentioned above, the oil stain remover according to the present invention has oil stain removal performance that could not be achieved by the conventional technology, and provides a homogeneous dyed textile product without causing any adverse effects in the subsequent dyeing process. It is something. That is, the anionic surfactant R-0-(R2)1. ~CH2C00M (wherein R1 is a straight or branched alkyl group having 6 to 18 carbon atoms, R
2 is an alkylene oxide residue having 2 to 4 carbon atoms or a mixed alkylene oxide residue thereof, M is an alkali or alkaline earth metal, alkanolamine, ammonium, or other organic amine), a nonionic surfactant, and an amphipathic compound. Substances (e.g. n-butanol, isobutanol, in-10-vinyl alcohol, 2-ethylhexanol,
dimethylformamide, hexamethylphosphoramide,
1. Petroleum hydrocarbons such as 3-dimethylimidazolidinone,
This led to the invention of an oil stain remover consisting of alkyl halides.

In addition, the nonionic surfactant referred to in the present invention is a special polyoxyalkylene alkyl ether type nonionic surfactant whose molecular weight distribution is very narrow compared to ordinary polyoxyalkylene alkyl ether type nonionic surfactants. is or contains a nonionic surfactant mixture.

The characteristics of the anionic surfactant constituting the present invention are compared to other anionic surfactants such as polyoxyethylene alkyl ether sulfates, alkylbenzene sulfonates, alkanesulfonates, and the like.

It has extremely high solubility in oil and strong penetrating power, so when applied to oil stains, the oil and short poems seep into the fibers.
It can be well miscible with H2. Moreover, since it is an ionic surfactant, it imparts a negative charge to the surface of oil particles detached from the fibers, and their mutual repulsive force can prevent them from re-adhering to the fibers.

The anionic surfactant has a strong detergency even in alkaline conditions.The anionic surfactant according to the present invention has the following general formula, and various types are possible, but preferably R, - 0-(R)-CI-12COOM1
2n R has 8 to 14 carbon atoms, R2 is an ethylene oxide or propylene oxide residue, n is 1 to 4, and M is sodium, potassium, ammonium, or alkaturamine.

Furthermore, the nonionic surfactant constituting the present invention may be one type or a mixture of two or more, but as an essential component, the molecular weight distribution is as shown in Figure 1. (The molecular weight distribution is shown in the figure) Contains a polyoxyalkylene ether type nonionic surfactant that is very narrow compared to the conventional polyoxyalkylene alkyl ether type nonionic surfactant. The solubility in oil is significantly improved compared to other alkylene oxides, and the emulsifying power and penetrating power for oil can be improved by selecting an appropriate number of moles of alkylene oxide for the type of oil. Demonstrate.

The fiber oil stain remover according to the present invention has a strong oil stain removal ability as a mutual effect of the special performance of the above-mentioned anionic surfactant and the polyoxyalkylene alkyl ether nonionic surfactant having a special molecular weight distribution. It is something that can be demonstrated.

[Effects of the Invention] As described above, the fiber oil stain remover according to the present invention has significantly higher oil stain removal ability than conventional products, and is superior to conventional oil stain removers of the same type during subsequent dyeing. A very uniform dyed product can be obtained compared to the case where there are often differences in hue, color density, etc. between the used part and other parts, resulting in defective products.

Although the reason for this is not completely clear, it is thought that the difference in oil stain removal ability and the difference in the elliptical structure of the surfactant have an effect.

The results of comparing the performance of the conventional product and the product of the present invention and the test method will be explained using examples.

[Test method] ■Evaluation method for oil removal performance One drop of lubricating oil (BX made by Nippon Lubricating Oil Co., Ltd.
-400) was added dropwise.

After leaving it for 4 hours, add 3 drops of oil stain remover using a billet directly above the dropped oil and leave it overnight.

Then, wash with 80°C water for 2 minutes and air dry. When a dry cloth is exposed to an ultraviolet lamp in a dark place, the areas where the oil remains will fluoresce and can be observed with the naked eye.

The grade was determined by visually comparing spots on a separately prepared standard scale indicating the amount of residual oil and spots on the test cloth.

Standard scale ■Evaluation method of influence on dyeing Dyeing was performed according to the recipe and method shown below, and the dyeing condition of the area where %1 oil was dropped was visually judged.

(Left space below) 1 Difference in color density with the surrounding area 2 Difference in hue of the color with the surrounding area 3 Overall evaluation of level dyeing A: Good L Run with a slight difference BC BC Excellent Table 2: Fair C: Large difference [Example] ■ Comparison example of oil removal performance Table 1 shows a comparison of the types of woven fabrics and the effects of the inventive product and the conventional product. Table 2 shows the composition of Examples.

■Comparison example of influence on dyeing Table 3.4 shows the comparison results between the product of the present invention and the commercially available product.

Table 4 Cotton canvas used Figure 1

[Brief explanation of the drawing]

FIG. 1 shows the molecular weight distribution of the essential nonionic surfactant constituting the present invention, and FIG. 2 shows the molecular weight distribution of a conventional polyoxyalkylene ether type nonionic surfactant. Figure 2 Patent applicant Nippon Surfactant Industries Co., Ltd. Bayer Japan Co., Ltd.

Claims (5)

[Claims] (1) An oil stain remover for fibers, which is characterized by containing an anionic surfactant, a nonionic surfactant, an amphiphilic substance, and a solvent that are soluble in oil. (2) The oil stain remover for fibers according to claim 1, wherein the anionic surfactant soluble in oil has the following general formula. R_1-O(R_2)_nCH_2COOM However, n
is an integer of 0 to 10, R_1 is a straight chain or branched alkyl group having 6 to 20 carbon atoms, R_2 is an alkylene oxide residue having 2 to 4 carbon atoms or a mixed alkylene oxide residue thereof,
M is an alkali or alkaline earth metal or an alkanolamine, ammonium or other organic amine. (3) The nonionic surfactant is or contains a polyoxyalkylene alkyl ether type nonionic surfactant that has a much narrower alkylene oxide addition distribution than that of ordinary polyoxyalkylene alkyl ether type nonionic surfactants. The oil stain remover according to claim 1, which is a nonionic surfactant mixture. (4) The oil stain remover for fibers according to claim 1, wherein the amphiphilic substance is a linear or branched alkyl alcohol having 3 to 10 carbon atoms or an aprotic polar solvent. (5) The oil stain remover according to claim 1, wherein the solvent comprises a petroleum hydrocarbon and an alkyl halide.