KR102740667B1 - Artificial leaher - Google Patents

Abstract

The present application relates to artificial leather and an automobile seat comprising the artificial leather. According to the present application, a matte effect can be exhibited without using a matting agent, and wear resistance, contamination resistance, and soft feel can be excellent.

Description

ARTIFICIAL LEAHER

The present application relates to artificial leather and an automobile seat comprising the artificial leather.

In general, functional seats for comfortable and pleasant driving are in the spotlight when it comes to car seats. The materials used for car seats are mainly natural leather, PVC, and PU artificial leather. Artificial leather has the advantage of being cheaper than natural leather.

In order to implement a matte effect on the surface of these artificial leathers, a matting agent is often used. Silica particles are mainly used as the matting agent, and after mixing it with a coating solution, it is coated on a substrate, and after curing, it has a mechanism of creating unevenness on the surface to mattify it. However, when a matting agent is used, although gloss is effectively reduced, there are problems such as an increase in the viscosity of the coating solution, a decrease in the dispersibility of the silica particles, and a rapid decrease in the wear resistance of the coating layer.

Therefore, to solve these problems, artificial leather that exhibits a matte effect without the use of a matting agent and has excellent wear resistance, contamination resistance, and soft feel is required.

The object of the present application is to provide artificial leather having a matte effect without using a matting agent and excellent wear resistance, contamination resistance and soft feel, and an automobile seat including the artificial leather.

The present application relates to artificial leather. FIG. 1 is a drawing exemplarily showing artificial leather according to one embodiment of the present application. As shown in FIG. 1, the artificial leather includes a substrate layer (120) and a surface treatment layer (110) formed by curing a surface treatment composition on the substrate layer. The artificial leather of the present application includes a surface treatment layer in which a surface treatment composition is cured, thereby exhibiting a matte effect and having excellent wear resistance, stain resistance, and soft feel.

In one embodiment, the surface treatment layer can be cured using a heat curing process through the application of appropriate heat or an aging process. Specifically, the surface treatment layer can be formed by coating the substrate layer with a Mayer bar coating method and then performing heat curing at a temperature of 100° C. to 140° C. for 30 seconds to 5 minutes. More specifically, the surface treatment layer can be formed by coating the substrate layer with the aforementioned coating method and then performing heat curing at a temperature of 110° C. to 130° C. for 1 minute to 3 minutes. By including the surface treatment layer on the substrate layer, a matte effect can be exhibited and excellent wear resistance, contamination resistance, and soft feel can be achieved.

The surface treatment layer has a squeak index of 0.05 or less as measured under a squeak test. Specifically, the squeak index of the surface treatment layer measured under the above-described test may be 0.03 or less or 0.01 or less. In addition, the lower limit of the squeak index of the surface treatment layer may be 0.001 or more or 0.005 or more. In addition, the squeak index means an index of a high-frequency continuous sound generated when the evaluation method described below is performed. When the squeak index of the surface treatment layer measured under the above-described test satisfies the above-described range, the surface treatment layer can exhibit excellent soft feel, that is, a soft texture.

In another example, the surface treatment layer may have a coefficient of kinetic friction of 0.3 or less as measured under a Squeak test. Specifically, the coefficient of kinetic friction of the surface treatment layer measured under the aforementioned test may be 0.2 or less. In addition, the lower limit of the coefficient of kinetic friction of the surface treatment layer measured under the aforementioned test may be 0.01 or more, 0.05 or more, or 0.1 or more. The coefficient of kinetic friction means a ratio of a force (dynamic friction force) that tries to impede the motion of one object when the object is in contact with the surface of another object and is moving to a reaction force perpendicular to the surface. When the coefficient of kinetic friction of the surface treatment layer measured under the above test satisfies the above-mentioned range, the surface treatment layer can exhibit excellent soft feel, i.e., a soft texture.

In another example, the surface treatment layer may have a gloss, specifically, a gloss of 4 or less as measured under 60° conditions with a BYK (Micro-TRI-gloss) gloss meter. Specifically, the gloss of the surface treatment layer measured under the aforementioned conditions may be 3.5 or less, 3 or less, 2.5 or less, 2 or less, or 1.5 or less. The lower limit of the gloss of the surface treatment layer measured under the aforementioned conditions is not particularly limited as long as it is close to 0. When the gloss of the surface treatment layer measured under the aforementioned conditions satisfies the aforementioned range, a matte effect can be exhibited.

In another example, the surface treatment layer may have an adhesion strength greater than 4B as measured under a tape crosscut test. In addition, the upper limit of the adhesion strength of the surface treatment layer as measured under the above-described test may be 5B or less. When the adhesion strength of the surface treatment layer as measured under the above-described test satisfies the above-described range, excellent adhesion may be exhibited.

In another example, the surface treatment layer may have a wear resistance of grade 4 or higher as measured under a Taber wear test. In addition, the upper limit of the wear resistance of the surface treatment layer as measured under the aforementioned test may be grade 5 or lower. The surface treatment layer as measured under the aforementioned test may exhibit excellent wear resistance in the aforementioned range.

The surface treatment composition included in the surface treatment layer includes a first water-dispersible polyurethane resin and a second water-dispersible polyurethane resin. As used herein, the term “water-dispersible polyurethane resin” means a material in which a polyurethane resin that does not dissolve in water is dispersed in water in the form of fine particles.

The above first water-dispersible polyurethane resin may have an average particle diameter of 1 ㎛ to 10 ㎛. Specifically, the average particle diameter of the first water-dispersible polyurethane resin may be 1.5 ㎛ to 8.5 ㎛, 2 ㎛ to 7 ㎛, or 2.5 ㎛ to 5.5 ㎛. When the average particle diameter of the first water-dispersible polyurethane resin satisfies the above-mentioned range, a height difference may occur due to the particle diameter difference with the second water-dispersible polyurethane resin, and an uneven structure may be formed on the surface upon curing, thereby exhibiting a matte effect and having excellent wear resistance, contamination resistance, and soft feel.

The second water-dispersible polyurethane resin may have a smaller particle size than the first water-dispersible polyurethane resin. For example, the second water-dispersible polyurethane resin may have an average particle size of 1 nm to less than 1000 nm. Specifically, the average particle size of the second water-dispersible polyurethane resin may be 10 nm to 850 nm, 20 nm to 700 nm, 30 nm to 550 nm, 40 nm to 400 nm, 50 nm to 250 nm, or 60 nm to 100 nm. Since the average particle size of the second water-dispersible polyurethane resin satisfies the above-described range, a height difference may be generated due to the particle size difference from the first water-dispersible polyurethane resin, and an uneven structure may be formed on the surface upon curing, thereby exhibiting a matte effect and having excellent wear resistance, contamination resistance, and soft feel.

In one example, the difference in average particle diameters (βd) between the first water-dispersible polyurethane resin and the second water-dispersible polyurethane resin may be 0.1 µm to less than 14 µm, 0.5 µm to 12 µm, 1 µm to 10 µm, 1.5 µm to 8 µm, or 2 µm to 6 µm. When the difference in average particle diameters between the first water-dispersible polyurethane resin and the second water-dispersible polyurethane resin satisfies the above-described range, a height difference may be generated to form an uneven structure on the surface upon curing, thereby exhibiting a matte effect and having excellent wear resistance, contamination resistance, and soft feel.

For this reason, the surface treatment composition of the present application may not include a matting agent. The surface treatment composition may exhibit a matting effect without using a matting agent and may have excellent wear resistance, contamination resistance, and soft feel by including a first water-dispersible polyurethane resin and a second water-dispersible polyurethane resin each satisfying the above-mentioned particle sizes.

In one example, the surface treatment layer may have a rough structure by the first water-dispersible polyurethane resin and the second water-dispersible polyurethane resin. The term "rough structure" in this specification means a structure having a predetermined pattern by repeating convex portions (111) and concave portions (112). For example, the rough structure may be formed by a height difference between the first water-dispersible polyurethane resin and the second water-dispersible polyurethane resin. Due to this, the surface treatment layer may exhibit a matting effect by increasing surface roughness, thereby exhibiting an excellent matting effect and may have excellent wear resistance, contamination resistance, and soft feel.

For example, the uneven structure may have a convex portion in a region where the first water-dispersible polyurethane resin exists, and a concave portion in a region where the second water-dispersible polyurethane resin exists.

In one example, the difference between the average height (h ₁₁₁ ) of the convex portion and the average height (h ₁₁₂ ) of the concave portion in the uneven structure of the surface treatment layer may be less than 0.5 ㎛ to 2 ㎛. Specifically, the average height difference may be 0.7 ㎛ to 1.8 ㎛, 0.9 ㎛ to 1.6 ㎛, 1.1 ㎛ to 1.4 ㎛, or 1.2 ㎛ to 1.3 ㎛. When the average height difference between the convex portion and the concave portion of the uneven structure of the surface treatment layer satisfies the above-described range, a matting effect can be exhibited, thereby exhibiting excellent matting effect, wear resistance, contamination resistance, and soft feel.

In one example, the first water-dispersible polyurethane resin and the second water-dispersible polyurethane resin may be reactants formed by the reaction of an isocyanate compound, a polyol, a neutralizing agent, an organic acid, water, and a chain extender. Specifically, the reactants of each of the first water-dispersible polyurethane resin and the second water-dispersible polyurethane resin may be produced by reacting the isocyanate compound, the polyol, and the organic acid together to synthesize a prepolymer, and then adding a neutralizing agent, water, and a chain extender.

The above isocyanate compound is for polyurethane synthesis. For example, the above isocyanate compound may be an aromatic isocyanate and/or an aliphatic isocyanate.

Specifically, the aromatic isocyanate may be at least one selected from the group consisting of toluene diisocyanate, diphenylmethane diisocyanate, phenylene diisocyanate, torylene diisocyanate and derivatives thereof, but is not limited thereto.

Additionally, the aliphatic isocyanate may be at least one selected from the group consisting of isophorone diisocyanate, cyclohexane diisocyanate, dicyclohexylmethane diisocyanate, hexamethylene diisocyanate, and derivatives thereof, but is not limited thereto.

The above polyol is for polyurethane synthesis, and is a liquid polymer substance having two or more hydroxyl (-OH) groups attached to a hydrocarbon chain. As the polyol, one or more compounds selected from the group consisting of polyester polyol, lactone polyol, polycarbonate polyol, and polyether polyol may be used, but is not limited thereto.

The neutralizing agent is intended to make the polyurethane ionic and enable water dispersion. As the neutralizing agent, one or more compounds selected from the group consisting of ethylamine, butylamine, dimethylamine, diisopropylamine, dimethylethylamine, benzylamine, ethanolamine, diethanolamine, triethanolamine, trimethylamine, triethylamine, tributylamine, diethylethanolamine, dimethylethanolamine, and diisopropanolamine may be used, but is not limited thereto.

The organic acid is used to introduce an ionic group into the chain so that the polyurethane can be dispersed in water. As the organic acid, one or more compounds selected from the group consisting of dimethylol propionic acid and dimethylol butanioxan may be used, but is not limited thereto.

The above chain extender is for increasing the molecular weight of polyurethane. As the chain extender, one or more compounds selected from the group consisting of dimethyl hydrazine, 1,6-hexamethylene bishydrazine, hydrazine monohydrite, ethylene diamine, 1,3-propanediamine, 1,4-butanediamine, 1,6-hexamethylene diamine, diaminophenyl methane, and isophorone diamine may be used, but is not limited thereto.

In another example, the first water-dispersible polyurethane resin and the second water-dispersible polyurethane resin can control the desired average particle size by controlling the weight average molecular weight, but are not limited thereto.

For example, the first water-dispersible polyurethane resin may have a weight average molecular weight of 5,000 to 20,000, 7,000 to 19,000, 9,000 to 18,000, 11,000 to 17,000, or 13,000 to 16,000. By satisfying the above-described weight average molecular weight, the first water-dispersible polyurethane resin may satisfy the above-described average particle diameter in the micrometer range.

In addition, the second water-dispersible polyurethane resin may have a weight average molecular weight of 30,000 to 50,000, 32,000 to 48,000, 34,000 to 46,000, 36,000 to 44,000, or 38,000 to 42,000. The second water-dispersible polyurethane resin may satisfy the above-described weight average molecular weight, thereby satisfying the above-described average particle diameter in the nanometer range.

The first water-dispersible polyurethane resin may be included in the surface treatment composition in an amount of 300 parts by weight to 500 parts by weight based on 100 parts by weight of the second water-dispersible polyurethane resin. Specifically, the content of the first water-dispersible polyurethane resin relative to 100 parts by weight of the second water-dispersible polyurethane resin may be 320 parts by weight to 470 parts by weight, 340 parts by weight to 440 parts by weight, 360 parts by weight to 410 parts by weight, or 380 parts by weight to 390 parts by weight. Since the first water-dispersible polyurethane resin has a content within the aforementioned range relative to 100 parts by weight of the second water-dispersible polyurethane resin, a matting effect can be exhibited without using a matting agent, and wear resistance, contamination resistance, and soft feel can be excellent.

The surface treatment composition may further contain an additive. Specifically, the surface treatment composition may further contain one or more additives selected from the group consisting of a thickener, an antifoaming agent, a wetting agent, and a curing agent. More specifically, the surface treatment composition may be composed of a two-component type.

Any type of additive known in the art may be used. In addition, the content of each additive may be appropriately selected in consideration of the purpose and use of the present application.

For example, as the curing agent, a compound including at least one functional group selected from the group consisting of an aziridine group, an isocyanate group, and a carbodiimide group per molecule can be used.

Specifically, the compound having the aziridine group refers to a compound including a complex three-membered ring composed of two carbon atoms and one nitrogen atom, such as 3-(3-methoxyphenyl)-3-(trifluoromethyl)-diaziridine; 3-(trifluoromethyl)-3-phenyldiaziridine; propane-2,2-diyldibenzene-4,1-diyl diaziridine-1-carboxylate; 1,1'-(butylphosphoryl)diaziridine; Oxydiethane-2,1-diyldiaziridine-1-carboxylate; 3,3-bis(1,1-difluoro-hexyl)-[1,2]diaziridine; 1-Aziridinepropanoicacid; 2-methyl-2-[[3-(2-methyl-1-aziridinyl)-1-oxopropoxy]methyl]-1,3-propanediylester; 2-Ethyl-2-[[3-(2-methyl-1-aziridinyl)-1-oxopropoxy]methyl]-1,3-propanediylester; 2-ethyl-2-[[3-(2-methyl-1-aziridinyl)-1-oxopropoxy]methyl]-1,3-propanediylbis(2-methyl-1-aziridinepropanoate); It may be at least one compound selected from the group formed by pentaerythritol tris[3-(1-aziridinyl)propionate], pentaerythritol tris(3-aziridinopropionate), and combinations thereof.

The compound having the above isocyanate group may include at least one selected from the group consisting of, for example, toluene diisocyanate, diphenylmethane diisocyanate, modified diphenylmethane diisocyanate, naphthalene diisocyanate, phenylene diisocyanate, hexamethylene diisocyanate, lysine isocyanate, cyclohexane diisocyanate, 3-isocyanetomethyl-3,5,5-trimethylcyclohexyl isocyanate, isophorone diisocyanate, methylenediphenyl isocyanate, xylene diisocyanate, tetramethylxylene diisocyanate, norbornene diisocyanate, triphenylmethane triisocyanate, polyphenyl polymethylene polyisocyanate, polyisocyanates containing a carbodiimide group, polyisocyanates containing an allophanate group, polyisocyanates containing an isocyanurate group, and combinations thereof. there is.

The compound having the above carbodiimide group may be a polycarbodiimide.

In addition, the curing agent may be included in the surface treatment composition in an appropriate amount for performing a curing reaction. For example, the curing agent may be included in the surface treatment composition in an amount of 5 to 15 parts by weight, specifically, 6 to 14 parts by weight, 7 to 13 parts by weight, or 8 to 11 parts by weight, based on 100 parts by weight of the surface treatment composition.

The substrate layer may be a known substrate layer used in the artificial leather industry, and may include, for example, natural leather or synthetic leather. In the case of the synthetic leather, it may be synthetic leather including polyvinyl chloride (PVC), polyurethane (PU), and polyester. The thickness of the surface treatment layer after heat curing may be 4 ㎛ to 24 ㎛. Specifically, the thickness of the surface treatment layer after heat curing may be 5 ㎛ to 21 ㎛, 6 ㎛ to 18 ㎛, 7 ㎛ to 15 ㎛, or 8 ㎛ to 12 ㎛. In the present specification, the thickness of the surface treatment layer may mean the maximum thickness of the surface treatment layer on which convex portions and concave portions are formed. When the surface treatment layer formed on the substrate layer has a thickness in the above-mentioned range, it may exhibit a matte effect and have excellent wear resistance, contamination resistance, and soft feel.

The present application also relates to a seat for an automobile. The seat for an automobile comprises the artificial leather described above, and the specific details of the artificial leather can be applied in the same manner as those described for the artificial leather.

The above-mentioned automobile seat includes the above-mentioned artificial leather. By including the above-mentioned artificial leather in the above-mentioned automobile seat, a matte effect can be exhibited and excellent wear resistance, contamination resistance, and soft feel can be achieved.

The artificial leather of the present application and the automobile seat including the artificial leather can exhibit a matte effect without using a matting agent and can have excellent wear resistance, contamination resistance, and soft feel.

FIG. 1 is a drawing exemplarily showing artificial leather according to one embodiment of the present application.
Fig. 2 is a photograph of artificial leather according to an embodiment of the present application.
Figure 3 is a photograph of artificial leather manufactured in an example taken at 1000x magnification using a scanning electron microscope.
Figures 4 to 6 are photographs of artificial leather according to Comparative Examples 1, 2, and 3 of the present application, respectively.

The present application is specifically described through the following examples, but the scope of the present application is not limited by the following examples.

Example

Preparation of a composition for surface treatment

At room temperature, 70 parts by weight of a first water-dispersible polyurethane resin (PUR MATT series, Alberdink boley) having an average particle diameter of 4 ㎛, 18 parts by weight of a second water-dispersible polyurethane resin (DLC series, Covestro) having an average particle diameter of 70 nm, 0.5 parts by weight of a thickener (viscoplus 3030, TEGO), 0.5 parts by weight of a defoaming agent (024, BYK), 1 part by weight of a wetting agent (surfonyl 104, EVONIK), and 10 parts by weight of a curing agent (desmodur N3900, COVESTRO) were mixed to prepare a surface treatment composition in the form of a mixture, based on 100 parts by weight of the total weight.

Manufacturing of artificial leather

The surface treatment composition manufactured above was applied to a synthetic leather made of polyvinyl chloride resin as a substrate layer, and after heat-curing at 120° C. for 2 minutes and drying, an artificial leather was manufactured in which a surface treatment layer having a thickness of 1.2 ㎛ with an average height difference between convex and concave portions was formed on the substrate layer. The artificial leather manufactured in the example was photographed and shown in Fig. 2.

In addition, Fig. 3 is a photograph of artificial leather manufactured in the example at 1000x magnification using a scanning electron microscope. As shown in Fig. 3, it was confirmed that the artificial leather manufactured in the example had irregular and uneven spacing between the unevennesses formed on the surface.

Comparative Example 1

Composition for surface treatment and production of artificial leather

A surface treatment composition and artificial leather were manufactured in the same manner as in Example 1, except that 8 parts by weight of a silica matting agent (Acematt 3300, EVONIK) was used instead of the first water-dispersible polyurethane resin per 100 parts by weight of the second water-dispersible polyurethane resin. The artificial leather manufactured in Comparative Example 1 was photographed and shown in Fig. 4.

Comparative Example 2

Composition for surface treatment and production of artificial leather

A surface treatment composition and artificial leather were manufactured in the same manner as in Example 1, except that the second water-dispersible polyurethane resin was not used. The artificial leather manufactured in Comparative Example 2 was photographed and is shown in Fig. 5.

Comparative Example 3

Composition for surface treatment and production of artificial leather

A surface treatment composition and artificial leather were manufactured in the same manner as in Example 1, except that the first water-dispersible polyurethane resin was not used. The artificial leather manufactured in Comparative Example 3 was photographed and is shown in Fig. 6.

Experimental Example 1. Gloss Evaluation

The gloss of the surface treatment layers manufactured in the examples and comparative examples was measured at 60° using a BYK (Micro-TRI-gloss) gloss meter, and the results are shown in Table 3 below.

Experimental Example 2. Adhesion Evaluation

It was evaluated by the tape-crosscut test method. Specifically, a 10 x 10 grid with a 1 mm gap was created, and the degree of adhesion of the surface treatment layer after attaching and removing the tape (TESA 4965) to the cut area was compared, and the results are shown in Table 3 below.

The evaluation criteria are shown in Table 1 below.

rating Degree of coating 5B The coating does not peel off and the grid remains clean. 4B Peeling off within 5% of the total grid area 3B Peeling off more than 5% but less than 15% of the total grid area 2B Peeling off more than 15% but less than 35% of the total grid area 1B Peeling off more than 35% but less than 65% of the total grid area 0B Stripping of more than 65% of the total grid area

Experimental Example 3. Evaluation of dynamic friction coefficient and squeak

Using a universal materials testing machine, two pieces of artificial leather according to each of the examples and comparative examples were placed face to face with their surface treatment layers facing each other, a 4.5 kg weight was attached to the upper part of the artificial leather located at the top, and the weight was pulled at a speed of 100 mm/min, which was repeated three times. At this time, the required force deviation (△F) and average force (F _a ) were obtained, and the coefficient of kinetic friction (μ) shown in the following general equation 1 and the squeak index shown in the following general equation 2 were calculated, and the results are shown in Table 3 below. In the case of the force deviation (△F), the average value of the values calculated for each number of performances was used.

[General formula 1]

[General formula 2]

In the above general formulas 1 and 2, W is the weight of the weight, ΔF is the deviation of the force required to pull the weight, and F _a is the average force required to pull the weight.

Experimental Example 4. Wear Resistance Evaluation

The artificial leather of the examples and comparative examples was subjected to abrasion tests 2000 times under a load of 1000 g using an abrasion wheel CS-10 using a Taber abrasion tester (Taber Abraser, Erichsen, 5135 Rotary platform abraser), and the results are shown in Table 3 below.

The evaluation criteria are shown in Table 2 below.

rating degree of wear Grade 5 No signs of wear whatsoever Grade 4 There are signs of wear and tear, but the amount is small and not obvious. 3rd grade Slight surface wear but no visible foam layer, or
Signs of wear and tear, prints, wrinkles, and loss of gloss should be limited to less than 10% of the friction area. 2nd grade Surface wear is present, and the foam layer is visible or its amount is less than 50%. 1st grade Severe wear and tear, with the foam layer exposed over most of the friction area

Example Comparative Example 1 Comparative Example 2 Comparative Example 3 Glossiness 1.2 1.2 0.7 15 Adhesiveness 5B 4B 0B 5B coefficient of kinetic friction 0.2 0.3 0.4 0.4 Squeak 0.006 0.1 0.3 0.6 My wear resistance 5 1 1 3

It was confirmed that the artificial leather manufactured in the examples had a lower coefficient of friction and squeak of the surface treatment layer than the artificial leather manufactured in Comparative Examples 1 to 3, and thus had excellent soft feel and wear resistance.

In addition, it was confirmed that the artificial leather manufactured in the example had better adhesion than the artificial leather manufactured in Comparative Examples 1 and 2, and lower glossiness of the surface treatment layer than the artificial leather manufactured in Comparative Example 3.

110: Surface treatment layer
111: Convex part
112: Concave
120: Base layer
h ₁₁₁ : height of convex part
h ₁₁₂ : Height of the concave part

Claims (13)

Substrate layer; and
A surface treatment layer is included on the above substrate layer, wherein the surface treatment composition is cured,
The above surface treatment layer has a Squeak index of 0.05 or less as measured under a Squeak test,
The surface treatment composition comprises an artificial leather comprising a first water-dispersible polyurethane resin having an average particle diameter of 1 ㎛ to 10 ㎛ and a second water-dispersible polyurethane resin having an average particle diameter of 1 nm to less than 1000 nm. In the first paragraph, the surface treatment layer is an artificial leather having a coefficient of friction of 0.3 or less as measured under a Squeak test. In the first paragraph, the surface treatment layer is an artificial leather having a gloss of 4 or less as measured under a gloss 60° condition. delete In claim 1, the surface treatment composition is an artificial leather that does not contain a matting agent. In the first paragraph, the surface treatment layer is an artificial leather having a rough structure by the first water-dispersible polyurethane resin and the second water-dispersible polyurethane resin. In the sixth paragraph, the artificial leather having a convex portion in an area where the first water-dispersible polyurethane resin exists and a concave portion in an area where the second water-dispersible polyurethane resin exists. In claim 7, an artificial leather having an average height difference between a convex portion and a concave portion in the uneven structure of less than 0.5 ㎛ to 2 ㎛. In the first paragraph, the first water-dispersible polyurethane resin and the second water-dispersible polyurethane resin are artificial leather which are reactants of an isocyanate compound, a polyol, a neutralizing agent, an organic acid, water, and a chain extender. In the first paragraph, an artificial leather comprising 300 to 500 parts by weight of the first water-dispersible polyurethane resin relative to 100 parts by weight of the second water-dispersible polyurethane resin. Artificial leather according to claim 1, further comprising at least one additive selected from the group consisting of a thickener, an antifoaming agent, a humectant and a hardener. In the first paragraph, the base layer is artificial leather including natural leather or synthetic leather. A car seat comprising artificial leather according to Article 1.