JP3385305B2 - Suede-like artificial leather - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suede-like artificial leather which is excellent in light resistance and dye fastness against washing and dry cleaning. More specifically, the present invention relates to a suede-like artificial leather suitable for applications such as clothing, shoes and gloves.

[0002]

2. Description of the Related Art Conventionally, a sheet obtained by impregnating a entangled nonwoven fabric with a polyurethane solution and then solidifying the polyurethane to give a fluffed surface is used as a suede-like artificial leather. A sheet in which a polyurethane layer is laminated is used as artificial leather with a silver surface tone. However, these artificial leathers have a problem in that they have insufficient color light resistance and washing fastness, and many proposals have been made to improve these problems. In particular, as a method for solving the above problems by improving the polyurethane constituting the artificial leather, for example, a method of using a polyurethane composition containing a compound represented by the following chemical formula (2) is disclosed in Japanese Patent Publication No. 57-5903. Proposed.

[0003]

[Chemical 2]

(However, K is hydrogen or benzyl group, R1
R5 represents hydrogen or a hydrocarbon group) Further, JP-B-59-43590 proposes to use a polyurethane composition obtained by adding a compound represented by the following chemical formula (3) to polyurethane for artificial leather.

[0005]

[Chemical 3] (However, R ₁ represents a hydrogen atom or a lower aliphatic group, R ₂ represents a hydrogen atom or a lower alkyl group, R ₃ and R ₄ represent the same or different lower alkyl groups, and R ₅ represents a lower aliphatic group.)

Further, there is also known a method of improving the performance of polyurethane by adding a stabilizer to a part of raw materials for producing polyurethane at the time of producing polyurethane to bond the stabilizer in the polyurethane molecular chain or at the terminal of the polyurethane molecular chain. As an example of such a method, a method of binding a hindered amine compound to a stabilizer and using it as a part of a raw material for polyurethane is disclosed in JP-B-57-58469, JP-B-59-51632 and JP-B-59-16232. 59-51
No. 633 and Japanese Patent Publication No. 62-49883.

Further, a method of enhancing the effect by adding other compound to polyurethane, for example, an inorganic acid, an organic carboxylic acid or a derivative thereof, or a polybasic acid is disclosed in Japanese Patent Publication No. 61-6097. Sho 59
It is proposed in Japanese Patent Publication No. 96118.

Furthermore, Japanese Patent Publication No. 6-37753 proposes a method of applying a hindered phenol compound and a hindered amine compound as a light resistance stabilizer to the surface of a suede-like artificial leather dyed with a metal-containing complex salt dye. .

As described above, as a method for improving the color light resistance and the color wash fastness of conventional artificial leather, a method of blending a stabilizer with polyurethane impregnated into or covering a non-woven fabric and a method of chemically stabilizing the polyurethane Methods have been adopted. However, many stabilizers have a poor affinity with polyurethane, and the stabilizer compounded in the polyurethane migrates to the surface over time and falls off from the artificial leather, or a step of producing the artificial leather, for example, a polyurethane solution is wetted. The effect of the stabilizer decreases due to deterioration or loss of the stabilizer due to chemical or physical effects in the coagulation process, the process of removing the polyurethane solvent from the artificial leather by washing, and the dyeing process or finishing process. Or may cause discoloration due to deterioration of the stabilizer, resulting in an unfavorable state.

Further, when the fibers constituting the artificial leather are polyamide fibers, particularly ultrafine polyamide fibers, the yellowing and brittleness of the fibers are taken into consideration to improve the light fastness of color and the fastness to washing. There is a limit. Further, regarding the dyes used for dyeing, relatively good metal-containing complex salt dyes have been generally used conventionally in terms of dyeability and light resistance of color, but in the case of a combination of these dyes and an ultrafine polyamide fiber, The wash fastness and vivid color were poor, and sufficient color variation or excellent wash fastness could not be obtained.

[0011]

DISCLOSURE OF THE INVENTION The present invention provides a suede-like artificial leather composed of an entangled nonwoven fabric of ultrafine polyamide fibers and polyurethane, which has sufficient light resistance for use in a field of application such as clothing, shoes or gloves. It is an object of the present invention to provide a material having discoloration resistance, color fastness to washing, and excellent color fastness to dry cleaning.

[0012]

SUMMARY OF THE INVENTION The present invention provides a suede-like artificial leather comprising a entangled nonwoven fabric composed of an ultrafine polyamide fiber having an average single fineness of 0.5 denier or less and a polymer mainly composed of polyurethane. At least one dye selected from the group consisting of sulfur dyes, vat dyes, and sulfur vat dyes, and a benzophenone compound represented by the following formula (1) are present on at least the surface of the leather. It is a suede-like artificial leather with excellent lightfastness, color fastness to washing and fastness to dry cleaning. Conventionally, there are known methods for increasing the lightfastness and color fastness to washing of suede-like artificial leather using various compounds, but when a specific dye used in the present invention and a specific benzophenone compound are combined. However, the cause is not clear, but due to the special interaction between both substances, an extremely excellent effect that cannot be predicted from the conventional combination is obtained.

[0013]

[Chemical 1]

The 2,2 ', 4,4'-tetrahydroxybenzophenone represented by the chemical formula (1) used in the present invention is a compound belonging to the so-called benzophenone type ultraviolet absorber. There are many kinds of general ultraviolet absorbers used as additives for polymer substances, and examples thereof include benzotriazole compounds, hindered amine compounds, salicylic acid derivative compounds, and benzophenone compounds. Furthermore, regarding benzophenone compounds, 2,4-dihydroxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxy-2'-carboxybenzophenone, 2-hydroxy-4-octoxybenzophenone,
Sodium 2,2'-dihydroxy-4,4'-dimethoxy-5-sulfobenzophenone, 5-chloro-2-hydroxy-benzophenone, 2,4-dibenzoyl-resorcinol, 2,2 ', 4,4'-tetrahydroxy There are many other compounds, including benzophenone.
Further, as for dyes, as dyes used for dyeing polyamide fibers, acid dyes, disperse dyes, metal complex dyes and the like are generally used, and in addition, direct dyes, naphthol dyes, vat dyes, sulfur dyes, etc. A small amount of dyes such as dyes and sulfur vat dyes are used.

In the present invention, a benzophenone compound is selected from among these many kinds of ultraviolet absorbers, and 2,2 ', 4,4'-tetra is selected from a myriad of compounds belonging to the benzophenone compound. A specific substance called hydroxybenzophenone is selected, and as regards the dyes to be used, vat dyes, sulfur dyes, and sulfur vat dyes, which are not commonly used in dyeing polyamide fibers, are also selected from many dyes. Is selected. And this particular benzophenone compound (ie 2,2 ',
By combining 4,4'-tetrahydroxybenzophenone) with a specific dye (that is, vat dye, sulfur dye, sulfur vat dye), it is extremely excellent in photochromic resistance that cannot be achieved by any other combination. The present invention has found that wash fastnesses of color and color are obtained.

That is, the present invention comprises an entangled nonwoven fabric composed of ultrafine polyamide fibers having an average single fineness of 0.5 denier or less, and a polymer mainly composed of polyurethane having a porous structure or a non-porous structure contained in the space of the nonwoven fabric. In a suede artificial leather, the surface of which is covered with fiber naps formed by the constituent fibers of the substrate, which is obtained by nap treatment of at least one surface of the substrate, which comprises a sulfur dye, a vat dye and a sulfur vat dye. The suede-like artificial leather is dyed with at least one dye selected from the above, and the composition liquid containing the benzophenone-based compound represented by the chemical formula (1) is then added to the colored suede-like artificial leather. The benzophenone compound is applied to the surface of leather to adhere the benzophenone compound to the surface portion. Further, by impregnating the colored suede-like artificial leather with the benzophenone composition liquid,
Alternatively, the benzophenone compound may be attached not only to the surface of the suede-like artificial leather but also to the inside thereof by a method of immersing a colored suede-like artificial leather in the composition liquid. Thus, by covering the dye adhering to the surface of the suede-like artificial leather with the benzophenone compound, the light resistance is remarkably improved.

Accordingly, at least one dye selected from the group consisting of sulfur dyes, vat dyes and sulfur vat dyes is represented by the above chemical formula (1) on at least the nap side surface of the suede-like artificial leather. A suede-like artificial leather containing a benzophenone compound is produced.

Here, the surface of the suede-like artificial leather means a napped portion, and the suede-like artificial leather is a sulfur dye,
As a result of dyeing with a vat dye and a dye mainly composed of a sulfur vat dye and further adding a benzophenone compound represented by the chemical formula (1), the benzophenone compound and the dye are present in the napped part. Of course, the dye or the benzophenone-based compound may penetrate inside the suede-like artificial leather.

As the polyamide ultrafine fibers forming the entangled body constituting the suede-like artificial leather in the present invention, 6-nylon, 66-nylon, 610-nylon, nylon having an aromatic ring, and mainly these An ultrafine fiber made of a copolymer or the like is used. Examples of the method for producing these ultrafine fibers include the following methods. That is, a method of mixing and melting at least two types of incompatible polymers and spinning the mixed melt, or melting at least two types of incompatible polymers separately and combining the respective polymers near the spinneret. First, a multicomponent fiber composed of two or more kinds of polymers is prepared by a method such as composite spinning. In this multi-component fiber,
At least one polymer constitutes the dispersion component (island component, that is, ultrafine denier fiber component), and the other polymer is the dispersion medium component (sea component), and the sea component surrounds the island component. It has a sea-island structure. In the present invention, polyamide is the island component. Further, in the present invention, a form in which each of two or more kinds of polymers is divided by another polymer in the cross-sectional direction of the fiber, that is, the two kinds of polymers form a plurality of layers in the fiber length direction and these layers are laminated. It may be in the form of forming a single fiber. Then, by dissolving or decomposing and removing the polymer of the dispersion medium component (a polymer other than polyamide is also referred to as the dispersion medium component in the case of the divided form) from these multi-component fibers, the island component remains, and the island component (that is, the ultrafine fiber). ) Are bundled to obtain fibers.

As the dispersion medium component (sea component) polymer,
Examples thereof include polyethylene, polystyrene, ethylene-propylene copolymer, sodium sulfoisophthalic acid copolymerized polyester and the like. The average single fineness of ultrafine polyamide fibers affects the texture and appearance of suede-like artificial leather. Especially when aiming at a suede-like artificial leather of cow leather or sheep leather, the average fineness is 0.5 denier or less, preferably 0.1 denier or less, more preferably 0.05 to
It is comprised in the range of 0.0001 denier. When the average fineness is more than 0.5 denier, it is preferable in terms of performance such as depth of color of dyed product, fastness to dyeing and abrasion resistance. It is not preferable in terms of texture, feel and appearance in obtaining suede-like or nubuck-like artificial leather of sheep leather.

As the polyurethane contained in the fiber entangled nonwoven fabric, at least one selected from the group consisting of polyester diol having an average molecular weight of 700 to 3000, polyether diol, polyester ether diol, polylactone diol, polycarbonate diol, etc.
An organic isocyanate in which at least one organic diisocyanate selected from the group consisting of aromatic diisocyanates and alicyclic diisocyanates is mainly used, and other organic diisocyanates, organic triisocyanates, etc. are blended as necessary. Further, a polyester polyurethane obtained by polymerizing a low molecular weight compound having two active hydrogen atoms such as a low molecular weight diol, a low molecular weight diamine, hydrazine and hydroxyamine by a solution polymerization method, a melt polymerization method, a bulk polymerization method or the like, Examples thereof include polyether polyurethane, polyester ether polyurethane, polylactone polyurethane, polycarbonate polyurethane and the like.

These polyurethanes are dissolved in a solvent or dispersed in a dispersant to prepare a polyurethane liquid, which is then impregnated into a fiber-entangled nonwoven fabric, treated with a non-solvent for polyurethane and wet- or dry-coagulated. A base fiber sheet composed of ultrafine fibers and polyurethane is obtained by dissolving and removing a polymer that is a dispersion medium component of the multicomponent fiber. Before impregnating the polyurethane entangled nonwoven fabric with the polyurethane liquid, the polymer as the dispersion medium component of the multi-component fiber may be dissolved and removed.

This base fiber sheet is sliced to a predetermined thickness, or at least one surface of the product is subjected to buffing treatment with sandpaper or raising treatment with a raising machine without slicing, and the surface is made of ultrafine polyamide fibers. The napped hair is formed, and the suede-like artificial leather is processed through washing and other steps. The weight ratio of polyurethane in suede-like artificial leather is 20 to 6
0% by weight is preferred.

The suede-like artificial leather produced by such a method is then dyed. The dye used for dyeing is at least one dye selected from the group consisting of sulfur dyes, vat dyes and sulfur vat dyes. Since these dyes are insoluble in water and have excellent fastness to washing, they are suitable for use in dyeing artificial leather for applications such as clothing, shoes, or gloves that often come into contact with water. As a dyeing method, an ordinary dyeing machine is used to dye under ordinary conditions. For example, the dyeing method includes a dip dyeing method, a gravure method, etc., and is not particularly limited, but when used for clothing, shoes, gloves, etc.,
From the viewpoint of texture and fastness, the dip dyeing method is preferable. Further, as for the dyeing machine, Wins dyeing machine, circular dyeing machine, dash line dyeing machine, Jigger dyeing machine and the like can be mentioned. Among them, a circular dyeing machine having sealing property is preferable. .

Dyeing is carried out by dyeing the suede-like artificial leather with the dye previously reduced under basic conditions, or immersing the suede-like artificial leather in the dye solution in a dispersed state, and then reducing under a basic condition. Is added or a reducing agent is added to dye under basic conditions. The dye concentration at this time is 0.01% to the weight of the suede-like artificial leather.
30%, especially 0.5% to 10% is preferable. Examples of the substance that creates basic conditions include sodium hydroxide, sodium carbonate, sodium hydrogen carbonate and the like. As the reducing agent, hydrosulfite, sodium sulfoxylate formaldehyde, sodium hydrosulfide, sodium sulfide, thiourea dioxide or the like can be used alone or in combination. The dyeing temperature is preferably 60 ° C. or higher, and if it is lower than 60 ° C., the color developability becomes insufficient and a light color or a hue lacking sharpness is obtained. Dyeing time is 10 minutes or more, preferably 30
It is about 60 minutes. If necessary, a reducing agent may be added for dyeing.

The dyed dye is then oxidized to render the dye water-insoluble. The oxidizing method is not particularly limited, but chemical solution oxidation is preferable because it is efficient. As the oxidizing agent, hydrogen peroxide, potassium dichromate, perboric acid and the like which are generally used in dyeing factories are also used in the present invention. A preferable dyeing amount of the dye on the suede-like artificial leather is in the range of 80 to 95% of the above dye concentration (that is, in the range of 0.008 to 27% based on the weight of the artificial leather). The suede-like artificial leather dyed according to the present invention has excellent washing fastness and dry cleaning fastness, and further exhibits clear color development.

Further, in the present invention, the dye represented by the chemical formula (1) given to the dyed suede-like artificial leather,
The 2 ', 4,4'-tetrahydroxybenzophenone compound prevents discoloration and fading of the dyed product which is also affected by the yellowing phenomenon of the polyamide fiber and polyurethane. The 2,2 ', 4,4'-tetrahydroxybenzophenone compound can be applied to a suede-like artificial leather by dissolving it in a solvent or emulsifying it in water. Examples of the solvent used when dissolved in a solvent include methanol, ethyl acetate, methyl ethyl ketone, and the like.
The amount of the 2,2 ′, 4,4′-tetrahydroxybenzophenone compound attached to the suede-like artificial leather is 0.1% by weight or more and 15% by weight or less based on the weight of the artificial leather. The stabilizing effect is small when the adhesion amount is small, but even if the adhesion amount is increased, a remarkable effect proportional to the application amount cannot be obtained.

The preferred state of adhesion of the benzophenone compound is to apply the surface of the suede-like artificial leather to the main body. Suitable application methods therefor include, for example, a gravure roll coater method, a reverse roll coater method, and a spray coater. Method, a curtain flow coater method or the like to evaporate and remove the solvent or water of the 2,2 ′, 4,4′-tetrahydroxybenzophenone compound. Alternatively, a method of dipping suede-like artificial leather in a solution or dispersion of the above benzophenone compound and a method of adhering it by a dip nip also have an excellent effect when a large amount is attached to the surface. In addition, the liquid containing the benzophenone compound, a napped state of the suede-like artificial leather, texture, a range that does not impair various performances of the surface, and a polymer that does not bring about discoloration and fading of the surface, for example, polycarbonate-based polyurethane, yellow-free Modified polyurethane or the like may be added as a spreading agent for the benzophenone compound.

The suede-like artificial leather is also preferably subjected to a rubbing treatment, a surface brushing treatment or the like in order to modify the texture and the appearance, if necessary. The suede-like artificial leather obtained in the present invention has light resistance and washing fastness,
It has excellent fastness to dry cleaning.

[0030]

The present invention will be described with reference to the following examples. The average fineness referred to in the present invention is obtained by taking a cross-sectional photograph of a fiber before extracting and removing the dispersion medium component with an electron microscope, and then measuring the total denier and the number of islands of the dispersion component (island component) constituting one fiber. It is obtained by dividing total denier by the number of islands. Further, parts and% in the examples relate to weight unless otherwise specified. The amount of dye adsorbed was determined by measuring the amount of dye remaining in the residual liquid of the dye liquid used for dyeing.

Example 1 Average weight per unit area of 650 g / m ² prepared by using a multi-component fiber having a fineness of 4.5 denier consisting of 40 parts of high-fluidity polyethylene (dispersion medium component) and 60 parts of 6-nylon (island component). A fiber sheet containing 13 parts of a polyurethane composition mainly composed of polyether-based polyurethane and 87 parts of dimethylformamide impregnated in the fiber-entangled non-woven fabric, and wet-coagulated to contain a polyurethane amount of 168 g / m ^2. Got This fiber sheet was treated in hot toluene to dissolve and remove the polyethylene component in the fiber, and a 6-nylon ultrafine fiber bundle fiber (average fineness: 0.05 denier) entangled nonwoven fabric containing polyurethane with a thickness of about 1.3 mm. A fibrous sheet (A) was obtained. The fibrous sheet (A) was divided into two in the middle, and the surface upon coagulation was formed into a fiber raised surface by an emery buffing machine and brushed to obtain a suede-like sheet (B) having an average thickness of 0.5 mm. This suede-like sheet (B) was dyed red with a vat dye.

Dyeing Indanthren Red FBB (BASF) 4.0% owf Reducing agent (Hydrosulfite) 15g / L Sodium hydroxide 2g / L Bath ratio 1: 100 Temperature; time 70 ° C-30 minutes Dyeing machine Circular dyeing machine Oxidation Hydrogen peroxide (30%) 3 g / L Acetic acid 3g / L Temperature; time 60 ° C-30 minutes

The red suede-like sheet obtained by dyeing, washing and drying was brushed and kneaded to obtain a suede-like product (C). By this dyeing treatment, the dye was dyed to the suede-like product (C) in an amount of 3.5% by weight based on the weight of the suede-like sheet before dyeing. Next, 2,2'4,4 'on the fiber nap surface of the suede preparation (C)
-A composition liquid (A-1) consisting of 10 parts of tetrahydroxybenzophenone and 90 parts of methyl ethyl ketone (hereinafter abbreviated as MEK) was applied by a gravure roll method, dried, and then brushed to prepare hair, and a suede-like sheet product ( D)
Got The amount of the benzophenone compound attached was 1.0% based on the weight of the artificial leather (C). Table 1 shows the results of the light resistance test, the washing test and the dry cleaning test using a fade tester on the suede-like sheet product. That is, the suede-like artificial leather of the present invention was excellent in light resistance and was also excellent in washing fastness, dry cleaning fastness, appearance and touch.

Example 2 The suede-like sheet (B) obtained in Example 1 was dyed in dark blue with a sulfur dye. Dyeing Asathiosol Pure Blue S-GL (Asahi Chemical Industry Co., Ltd.) 8.0% owf Reducing agent (sodium hydrosulfide) 7g / L Bath ratio 1: 100 Temperature; time 70 ℃ -30 minutes Dyeing machine Circular dyeing machine Oxidized hydrogen peroxide (30%) 3 g / L acetic acid 3 g / L temperature; time 60 ° C.-30 minutes

After dyeing, the same treatment as in Example 1 was carried out to obtain a suede preparation (E). Next, the suede preparation (E) was treated with the composition liquid (A-1) in the same manner as in Example 1 to obtain a suede preparation (F). The dyed amount of the suede preparation (E) was 6.8% of the weight of the suede-like sheet before dyeing, and the benzophenone compound adhesion amount was 1. 0
%Met. As a result of a light resistance test using a fade tester and a washing test on the suede-prepared product (F), it was excellent in light resistance of grade 6 and washing fastness of grade 5.

Example 3 The suede-like sheet (B) obtained in Example 1 was dyed blue with a sulfurized vat dye. Dyeing Hydoron Blue 3RC (Dystar) 4.0% owf Reducing agent (Hydrosulfite) 7g / L Bath ratio 1: 100 Temperature; time 70 ℃ -30 minutes Dyeing machine Circular dyeing machine Hydrogen peroxide (30%) ) 3 g / L acetic acid 3 g / L temperature; time 60 ° C.-30 minutes

After dyeing, the same treatment as in Example 1 was carried out to obtain a suede preparation (G). Next, the suede preparation (G) was treated with the composition liquid (A-1) in the same manner as in Example 1 to obtain a suede preparation (H). The amount of the dye attached to the suede preparation (G) was 3.6% of the weight of the suede-like sheet before dyeing, and the amount of the benzophenone compound attached was 0.9% to the suede preparation (G).
% Weight. As a result of performing a light resistance test and a washing test with a fade tester on the suede preparation (H), it was excellent in light resistance of grade 6 and washing fastness of grade 5.

Comparative Example 1 The dyed suede preparation (C) obtained in Example 1 was
A composition liquid (A-2) consisting of 10 parts of 2'-dihydroxy-4,4'-dimethoxybenzophenone and 90 parts of MEK is applied by a gravure roll method, dried, and then brushed to prepare hair, and a suede-like sheet product. (I) was obtained. The dye preparation amount and the benzophenone compound adhesion amount were the same as in Example 1. As a result of a light resistance test and a washing test using a fade tester on this suede-like sheet product, the washing fastness is excellent at 5 grade, but the light resistance is 4
It was graded and yellowed.

Comparative Example 2 The suede-like sheet (B) obtained in Example 1 was dyed red with a metal-containing complex salt dye. Dyeing Irgalan Red 2GL (Ciba) 4.0% owf Bath ratio 1: 100 Temperature; time 90 ℃ -30 minutes Dyeing machine Circular dyeing machine

After dyeing, the same treatment as in Example 1 was carried out to obtain a suede preparation (J). Next, the suede preparation (J) was treated with the composition liquid (A-1) in the same manner as in Example 1 to obtain a suede preparation (K). The amount of dye dyeing is
The weight of the suede-like sheet was 3.53%, and the amount of the benzophenone compound attached was the same as in Example 1. As a result of a light resistance test and a washing test by a fade tester on the suede preparation (K), it was excellent in light resistance of 6th grade, but was 3rd in fastness to washing,
The red dye was missing. Table 1 shows the light resistance and washing fastness of the suede-like artificial leather obtained as described above.

Comparative Example 3 The dyed suede preparation (C) obtained in Example 1 was treated with 4-te
A composition liquid consisting of 10 parts of rt-butyl-phenylsalicylate and 90 parts of methyl ethyl ketone was applied by a gravure roll method, dried, and then hair was brushed to prepare a suede-like sheet product (L). 4-tert-butyl-phenylsalicylat
The attached amount of e was the same as the attached amount of the benzophenone compound in Example 1. This suede-like sheet product was subjected to a light resistance test and a wash test by a fade tester. The results are shown in Table 1.

Comparative Example 4 In the above Comparative Example 3, 4-tert-butyl-phenylsalicylat
A suede-like sheet product (M) was obtained in the same manner as in Comparative Example 3 except that e was replaced with 5-chloro-2-hydroxybenzophenone. The amount of 5-chloro-2-hydroxybenzophenone deposited was the same as the amount of the benzophenone compound deposited in Example 1. This suede-like sheet product was subjected to a light resistance test and a wash test by a fade tester. The results are shown in Table 1.

Comparative Example 5 In Comparative Example 3 above, 4-tert-butyl-phenylsalicylat
A suede-like sheet product (N) was obtained in the same manner as in Comparative Example 3 except that e was replaced with 2,4-dibenzoyl-resorcinol. The amount of 2,4-dibenzoyl-resorcinol attached was the same as the amount of the benzophenone compound attached in Example 1.
This suede-like sheet product was subjected to a light resistance test and a wash test by a fade tester. The results are shown in Table 1.

Comparative Example 6 In Comparative Example 3 above, 4-tert-butyl-phenylsalicylat
A suede-like sheet product (P) was obtained in the same manner as in Comparative Example 3 except that e was replaced with 2- (2'-hydroxy-5'-methylphenyl) benzotriazole. 2- (2'-hydroxy-5'-methylphe
The amount of attached nyl) benzotriazole was the same as the amount of attached benzophenone compound in Example 1. This suede-like sheet product was subjected to a light resistance test and a wash test by a fade tester. The results are shown in Table 1.

Comparative Example 7 In the above Comparative Example 3, 4-tert-butyl-phenylsalicylat
A suede-like sheet product (Q) was obtained in the same manner as in Comparative Example 3 except that e was replaced with 2-hydroxy-4-methoxy-benzophenone. The amount of 2-hydroxy-4-methoxy-benzophenone deposited was the same as the amount of the benzophenone compound deposited in Example 1. This suede-like sheet product was subjected to a light resistance test and a wash test by a fade tester. The results are shown in Table 1.

[0046]

[Table 1]

Regarding the light resistance, the eighth grade is the highest, and the light resistance deteriorates as the grade decreases. Further, regarding the fastness to washing and the fastness to dry cleaning, the fifth grade is the highest, and as the grade is lowered, the fastness to washing and the fastness to dry cleaning are lowered. Regarding light resistance, J
According to IS L 0841, J
It was measured according to IS L 0844 and according to JIS L 0860 for dry cleaning fastness.

[0048]

The suede-like artificial leather obtained by the present invention is very excellent in light resistance, washing fastness and dry cleaning fastness, and can be used for clothing, shoes, gloves and the like.

Continuation of front page (51) Int.Cl. ⁷ Identification code FI D06P 1/22 D06P 1/22 1/30 1/30 A 3/00 3/00 L 3/82 3/82 F 5/04 5/04 // D06M 13/12 D06M 13/12 (58) Fields investigated (Int.Cl. ⁷ , DB name) D06N 3/00-3/18 B32B 5/00-5/32 B32B 27/00-27/42 D06P 5/04 D06M 13/00-13/12

Claims (2)

(57) [Claims] 1. A suede-like artificial leather comprising a entangled non-woven fabric composed of ultrafine polyamide fibers having an average single fineness of 0.5 denier or less and a polymer mainly composed of polyurethane, wherein a sulfur dye is provided on at least the surface of the suede-like artificial leather. At least one dye selected from vat dyes and sulfurized vat dyes, and a benzophenone compound represented by the following formula (1) are present, and a suede-like artificial leather. [Chemical 1] 2. A suede-like artificial leather composed of an entangled nonwoven fabric made of an ultrafine polyamide having an average single fineness of 0.5 denier or less and a polymer mainly composed of polyurethane is selected from a sulfur dye, a vat dye and a sulfur vat dye. And a benzophenone compound represented by the following formula (1). Then, a suede-like artificial leather is produced. [Chemical 1]