KR940003267B1 - Composition for degreasing leather - Google Patents

Abstract

The leather treating agent compsn comprises 10-70 wt. pts. of polyoxy ethylenealkyl phenol type nonionic surfactant; and 10-50 wt. pts. of polyoxy ethylene alcohol type nonionic surfactant; and 20-80 wt. pts. of hydrophobic solvent. The polyoxy ethylenealkyl phenol type cpd. is prepared by adding 5-15 mole of ethylene oxide to C6-12 alkyl. The polyoxy ethylenealcohol is prepd. by adding 5-15 mole of ethylene oxide to C6-18 alcohol. The hydrophobic solvent is selected from C1-12 alcohol, 1,1,1-trichloroethane, trichloroethylene or white paraffin oil. The obtd. compsn has good fat-removing property.

Description

Leather treatment agent composition

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leather treatment agent composition, and more particularly, to a leather treatment agent composition having improved leather degreasing power to remove fats present in leather itself strongly and efficiently in order to improve the quality of leather.

In the processing of leather, the process of removing fat is called degreasing process and the substance that removes fat is called degreasing agent. The fat present in the leather itself must be removed to improve the quality of the leather as well as all chemicals used during the processing of leather. Penetration of the film occurs uniformly. If the fat is not removed enough, not only the staining occurs in the leather during the dyeing process, but also the quality of the product deteriorates remarkably, which reduces the value of the fat.

The fat content of the leather used in the leather processing industry is 7.0% of sheepskin, 14.0% of sheepskin, and 65.8% of pork skin. The fat content varies according to the type of leather. Degreasing is an essential process.

In this case, as a material used as a degreasing agent, negative, nonionic surfactants and hydrophilic solvents are mainly used, and the problem of degreasing of leather is seriously raised in leather processing companies.

Korean Patent No. 15352, which relates to the characteristics of the conventional composite surfactant, states that low interfacial tension is excellent in penetrating power and excellent degreasing force even at cloud point of 100 ° C. or higher. The degreasing power is excellent because the cloud point is high and the solubility is stable. However, since the degreasing process of the leather processing process is carried out at 30 ° C. or less, the effect on the cloud point is not large.

As known matters, polyoxyethylene alkylphenols, polyoxyethylene alcohols, and the like, which are nonionic surfactants, are used as degreasing detergents. However, no specific ratios of mixed use are described. Although it is effective to remove the fat and heavy contaminants, such as pork skin and sheepskin, the experiments of the present invention proved that only the non-anionic surfactants are insufficient, which is affinity with the hydrophobic group of the surfactant and the fats and contaminants present in leather. Because of this lack, degreasing and detergency were found to be inferior.

Accordingly, the present inventors have significantly improved the affinity between the hydrophobic groups of the surfactant and the fats present in the leather and contaminants to remove the fats present in the leather efficiently and hydrophobicly. When the solvent is mixed and used at an appropriate ratio, the fat of the leather is significantly removed, and the quality of the leather is improved, thus completing the present invention.

That is, an object of the present invention is to provide a leather treatment agent composition which improves the quality of leather by removing fat from the leather strongly and efficiently.

Hereinafter, the present invention will be described in detail.

The present invention is 10 to 70 parts by weight of polyoxyethylene alkylphenol-based nonionic surfactant in which ethylene oxide is added to alkylphenol, and 10 to 50 parts by weight of polyoxyethylene alcohol-based nonionic surfactant in which ethylene oxide is added to alcohol. Characterized in that the leather treatment composition composed of 20 to 80 parts by weight of the solvent.

As described above in more detail the present invention.

The present invention is a leather treatment composition comprising a hydrophobic solvent having excellent affinity with fats contained in the leather itself together with a polyoxyethylene alkylphenol-based and a polyoxyethylene alcohol-based nonionic surfactant. Oxyethylene alkyl phenol is a substance obtained by adding 5 to 15 mol, preferably 6 to 9 mol of ethylene oxide to an alkyl group having 6 to 12 carbon atoms, preferably 8 to 9 carbon atoms, and polyoxyethylene alcohol It is a substance obtained by adding 5 to 15 mol, preferably 6 to 9 mol of ethylene oxide to an alcohol having 6 to 18 carbon atoms, preferably 8 to 12 carbon atoms.

It is preferable to use 10 to 70 parts by weight of the polyoxyethylene alkylphenol-based nonionic surfactant in the composition of the present invention, if it is used in the above range, the fat is not removed efficiently from the leather degreasing power In the case of the polyoxyethylene alcohol-based nonionic surfactant, 10 to 50 parts by weight is preferred, but if used in the above range, the degreasing force is lowered as described above so that the desired effect cannot be obtained in the present invention. do.

Representative examples of the polyoxyethylene alkyl phenol-based nonionic surfactants used in the present invention include polyoxyethylene nonyl phenol, polyoxyethylene octyl phenol and the like, and polyoxyethylene alcohol may include polyoxyethylene octanol. .

As the hydrophobic solvent according to the present invention, one or more selected from alcohols having 4 to 12 carbon atoms, 1.1.1-trichloroethane, trichloroethylene and white kerosene may be used, and the amount thereof is preferably 20 to 80 parts by weight. Do. If the hydrophobic solvent is used in an amount greater than the above range, the hydrophobic solvent may not exhibit affinity with the fat of the leather itself, and the degreasing power may be significantly reduced.

Thus, the leather treatment agent composition obtained by mixing a polyoxyethylene alkyl phenol-based and polyoxyethylene alcohol-based nonionic surfactant in the above ratio with a hydrophobic solvent exhibits a strong affinity with fats in the leather, so that the degree of degreasing is excellent. There is an effect that can greatly improve the quality of the leather.

Hereinafter, the present invention will be described in detail with reference to Examples.

EXAMPLE

Example 1

Before degreasing, take the size of 20 × 20cm2 (thickness 1.5-2.0mm) and wash it with clean water. The washed leather before degreasing was put into an experimental drum at 30 ° C., and then rotated for 1 hour by adding a leather treatment composition including 35 parts by weight of polyoxyethylene nonylphenol, 20.6 parts by weight of polyoxyethylene octanol, and 44.4 parts by weight of octanol. Wash with clean water and dry. In order to extract the fat present in the degreasing test specimens, the fat content (content) extracted by petroleum ether for 6 hours was shown in Table 1 below.

[Examples 2 to 6]

Examples 2 to 6 are degreased by using the leather treatment agent composition prepared in the ratio shown in Table 1 and the same as the method of Example 1 in the test piece of the leather collected in Example 1 The amount was measured and the results are shown in Table 1 below.

Comparative Example 1 to Comparative Example 14

In Comparative Examples 1 to 14, the test piece of leather collected in Example 1 was degreased using the leather treatment agent composition prepared in the ratio shown in Table 1 below, and the content of leather in the same manner as in Example 1 was determined. The results are shown in Table 1 below.

TABLE 1

Example 6 of Table 1 indicates that the degree of degreasing of the leather treated with the leather treatment agent composition of the present invention is very excellent.

As a result of testing the degreasing power of the leather treated with a polyoxyethylene alkylphenol-based or polyoxyethylene alcohol-based nonionic surfactant and hydrophobic solvent alone, the degreasing power of the leather treatment agent composition in which the hydrophobic solvent was mixed at a specific ratio was significantly higher. You can see the increase. This is because the hydrophobic solvent has a strong affinity for the fat of the leather itself, and the surfactant improves the emulsification, solubilization and degreasing power, and when mixed in a specific ratio as shown in Table 1 above than when used alone, The action was very high, indicating a high degreasing force. In addition, when the amount of the surfactant is too large or too small, as in Comparative Examples 13, 14, 15, it was found that the degreasing force is low because there is no interaction of the respective physical properties.

Claims (2)

A leather treatment composition comprising 10 to 70 parts by weight of a polyoxyethylene alkylphenol-based nonionic surfactant, 10 to 50 parts by weight of a polyoxyethylene alcohol-based nonionic surfactant, and 20 to 80 parts by weight of a hydrophobic solvent. Leather treatment agent composition. The polyoxyethylene alkylphenol system according to claim 1, wherein 5 to 15 moles of ethylene oxide is added to an alkyl group having 6 to 12 carbon atoms, and polyoxyethylene alcohol is 5 to 15 ethylene oxide to an alcohol having 6 to 18 carbon atoms. And a hydrophobic solvent is selected from one or more selected from alcohols having 4 to 12 carbon atoms, 1.1.1-trichloroethane, trichloroethylene and white kerosene.