Vinyl chloride resin composition, vinyl chloride resin molded article, and laminate

Abstract

To provide a polyvinyl chloride resin composition that can form a polyvinyl chloride resin molded article that excels in low-temperature tensile elongation after heating.SOLUTION: A polyvinyl chloride resin composition contains a polyvinyl chloride resin, a plasticizer, and an ionic compound. The ionic compound comprises a cation containing nitrogen or phosphorus, and an anion containing fluorine. The polyvinyl chloride resin composition is preferably used for powder molding.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a vinyl chloride resin composition, a vinyl chloride resin molded article, and a laminate. [Background technology]

[0002] Polyvinyl chloride resin is generally used in a variety of applications because of its excellent properties such as cold resistance, heat resistance, and oil resistance. Specifically, for example, automotive interior materials such as a surface made of a molded polyvinyl chloride resin or a laminate made by backing a surface made of a molded polyvinyl chloride resin with a foam such as foamed polyurethane are used to form automotive interior parts such as instrument panels and door trims.

[0003] Furthermore, the vinyl chloride resin molded articles that constitute the surface of automotive interior parts such as automotive instrument panels are manufactured, for example, by powder molding a vinyl chloride resin composition containing vinyl chloride resin, a plasticizer, and additives such as pigments using known molding methods such as powder slush molding (see, for example, Patent Document 1).

[0004] Specifically, for example, Patent Document 1 describes how a vinyl chloride resin surface is produced by powder slush molding a vinyl chloride resin composition containing vinyl chloride resin particles, a trimellitic acid ester-based plasticizer, and additives such as a pigment made from a mixture of phthalocyanine blue, titanium dioxide, and carbon. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 8-291243 [Overview of the project] [Problems that the invention aims to solve]

[0006] Here, polyvinyl chloride resin molded articles used as the surface material for automotive interior parts are required to exhibit excellent tensile elongation when evaluated at low temperatures (hereinafter sometimes referred to as "low-temperature tensile elongation"). Furthermore, when polyvinyl chloride resin molded articles are heated, their low-temperature tensile elongation decreases due to thermal aging, etc. Therefore, there is an even greater requirement for polyvinyl chloride resin molded articles to exhibit excellent low-temperature tensile elongation after heating.

[0007] However, the vinyl chloride resin molded articles obtained by powder slush molding of the above-mentioned conventional vinyl chloride resin composition had room for improvement in low-temperature tensile elongation after heating.

[0008] Therefore, the present invention aims to provide a vinyl chloride resin composition capable of forming a vinyl chloride resin molded article that exhibits excellent low-temperature tensile elongation after heating. Furthermore, the present invention aims to provide a polyvinyl chloride resin molded article that exhibits excellent low-temperature tensile elongation after heating. Furthermore, the present invention aims to provide a laminate comprising the vinyl chloride resin molded body. [Means for solving the problem]

[0009] The inventors diligently conducted research with the aim of solving the above problems. As a result, the inventors discovered that by molding a vinyl chloride resin composition containing vinyl chloride resin, a plasticizer, and a predetermined ionic compound, a vinyl chloride resin molded article with excellent low-temperature tensile elongation after heating can be obtained, and thus completed the present invention.

[0010] In other words, the present invention aims to advantageously solve the above problems, and the vinyl chloride resin composition of the present invention comprises a vinyl chloride resin, a plasticizer, and an ionic compound, wherein the ionic compound consists of a cation containing nitrogen or phosphorus and an anion containing fluorine. Thus, by using a vinyl chloride resin composition comprising a vinyl chloride resin, a plasticizer, and a predetermined ionic compound, a vinyl chloride resin molded article with excellent low-temperature tensile elongation after heating can be formed.

[0011] Here, the vinyl chloride resin composition of the present invention preferably contains at least one of trimellitic acid ester and polyester as the plasticizer, and the total content of trimellitic acid ester and polyester in the vinyl chloride resin composition is 30 parts by mass or more and 200 parts by mass or less per 100 parts by mass of vinyl chloride resin. By using at least one of trimellitic acid ester and polyester as the plasticizer and keeping the total content of trimellitic acid ester and polyester in the vinyl chloride resin composition within the above predetermined range, the low-temperature tensile elongation after heating of the formed vinyl chloride resin molded article can be further increased.

[0012] Furthermore, it is preferable that the vinyl chloride resin composition of the present invention contains at least the polyester as the plasticizer, and that the polyester contains structural units derived from adipic acid and structural units derived from 3-methyl-1,5-pentanediol. By using a polyester containing structural units derived from adipic acid and structural units derived from 3-methyl-1,5-pentanediol, the low-temperature tensile elongation after heating of the formed vinyl chloride resin molded article can be further increased.

[0013] Furthermore, it is preferable that the vinyl chloride resin composition of the present invention has a quaternary phosphonium ion as the cation. If the cation constituting the ionic compound is a quaternary phosphonium ion, it is possible to suppress variations in the initial color tone when the vinyl chloride resin composition is molded.

[0014] Furthermore, in the vinyl chloride resin composition of the present invention, it is preferable that the quaternary phosphonium ion is a tributyldodecylphosphonium ion. If the quaternary phosphonium ion is a tributyldodecylphosphonium ion, it is possible to suppress variations in the initial color tone when the vinyl chloride resin composition is molded.

[0015] Furthermore, in the vinyl chloride resin composition of the present invention, it is preferable that the anion is bis(trifluoromethylsulfonyl)imide ion. If the anion constituting the ionic compound is bis(trifluoromethylsulfonyl)imide ion, fluctuations in the initial color tone when the vinyl chloride resin composition is molded can be suppressed.

[0016] Also, the vinyl chloride resin composition of the present invention is preferably used for powder molding. If the vinyl chloride resin composition is used for powder molding, for example, a vinyl chloride resin molded body that can be favorably used as an automotive interior material such as the skin for an automotive instrument panel can be easily obtained.

[0017] And, the vinyl chloride resin composition of the present invention is preferably used for powder slush molding. If the vinyl chloride resin composition is used for powder slush molding, for example, a vinyl chloride resin molded body that can be favorably used as an automotive interior material such as the skin for an automotive instrument panel can be more easily obtained.

[0018] Furthermore, this invention aims to advantageously solve the above problems, and the vinyl chloride resin molded body of the present invention is characterized by being formed by molding any of the above-described vinyl chloride resin compositions. Thus, the vinyl chloride resin molded body formed by molding the above-described vinyl chloride resin composition is excellent in low-temperature tensile elongation after heating.

[0019] And, the vinyl chloride resin molded body of the present invention is preferably for the skin of an automotive instrument panel. The vinyl chloride resin molded body of the present invention can be suitably used as the skin of an automotive instrument panel excellent in low-temperature tensile elongation after heating.

[0020] Furthermore, the present invention aims to advantageously solve the above problems, and the laminate of the present invention is characterized by having either a foamed polyurethane molded body or the above-described vinyl chloride resin molded body. The laminate having the foamed polyurethane molded body and the above-described vinyl chloride resin molded body includes a vinyl chloride resin molded body portion excellent in low-temperature tensile elongation after heating.

[0021] And the laminate of the present invention is preferably used for an automotive instrument panel. Thus, when the laminate of the present invention is used for an automotive instrument panel, the skin of the produced automotive instrument panel can exhibit excellent low-temperature tensile elongation even after heating.

Effect of the Invention

[0022] According to the present invention, it is possible to provide a vinyl chloride resin composition capable of forming a vinyl chloride resin molded body excellent in low-temperature tensile elongation after heating. Also, according to the present invention, it is possible to provide a vinyl chloride resin molded body excellent in low-temperature tensile elongation after heating. Furthermore, according to the present invention, it is possible to provide a laminate including the vinyl chloride resin molded body.

Mode for Carrying Out the Invention

[0023] Hereinafter, embodiments of the present invention will be described in detail. The vinyl chloride resin composition of the present invention can be used, for example, when forming the vinyl chloride resin molded body of the present invention. And the vinyl chloride resin molded body formed using the vinyl chloride resin composition of the present invention can be suitably used as an automotive interior material, such as the skin provided in automotive interior parts such as automotive instrument panels and door trims. Furthermore, the vinyl chloride resin molded article of the present invention can be used, for example, when forming the laminate of the present invention. The laminate formed using the vinyl chloride resin molded article of the present invention can be suitably used as an automotive interior material when manufacturing automotive interior parts such as automotive instrument panels and door trims.

[0024] (Vinyl chloride resin composition) The vinyl chloride resin composition of the present invention is characterized by comprising (a) a vinyl chloride resin, (b) a plasticizer, and (c) a predetermined ionic compound. Furthermore, the vinyl chloride resin composition of the present invention may optionally further contain additives other than (a) vinyl chloride resin, (b) plasticizer, and (c) the specified ionic compound. Furthermore, since the vinyl chloride resin composition of the present invention contains at least (a) vinyl chloride resin, (b) a plasticizer, and (c) a predetermined ionic compound, it is possible to form a vinyl chloride resin molded article with excellent low-temperature tensile elongation after heating. Therefore, by using the vinyl chloride resin composition of the present invention, it is possible to obtain a vinyl chloride resin molded article suitable as an automotive interior material, such as an automotive instrument panel surface and a door trim surface, which has excellent low-temperature tensile elongation after heating. Furthermore, from the viewpoint of easily obtaining a vinyl chloride resin molded article that can be used well as an automotive interior material using the vinyl chloride resin composition of the present invention, the vinyl chloride resin composition of the present invention is preferably used in powder molding, and more preferably in powder slush molding.

[0025] (a) Polyvinyl chloride resin (a) As the vinyl chloride resin, particulate vinyl chloride resin is usually used. The vinyl chloride resin (a) may contain, for example, one or more types of vinyl chloride resin particles, and optionally further contain one or more types of vinyl chloride resin fine particles. In particular, the vinyl chloride resin (a) preferably contains at least vinyl chloride resin particles, and more preferably contains vinyl chloride resin particles and vinyl chloride resin fine particles. Furthermore, (a) vinyl chloride resin can be produced by any of the conventionally known manufacturing methods, such as suspension polymerization, emulsion polymerization, solution polymerization, or bulk polymerization. In this specification, "resin particles" refers to particles with a particle diameter of 30 μm or more, and "resin fine particles" refers to particles with a particle diameter of less than 30 μm.

[0026] Furthermore, (a) as the vinyl chloride resin, examples include homopolymers consisting of vinyl chloride monomer units, as well as vinyl chloride copolymers containing preferably 50% by mass or more, more preferably 70% by mass or more, of vinyl chloride monomer units. Specific examples of monomers (comonomers) copolymerizable with vinyl chloride monomers that can constitute a vinyl chloride copolymer include, for example, those described in International Publication No. 2016 / 098344. These components may be used individually or in combination of two or more in any ratio.

[0027] <<Vinyl chloride resin particles>> In a vinyl chloride resin composition, vinyl chloride resin particles typically function as a matrix resin (base material). It is preferable that the vinyl chloride resin particles be produced by suspension polymerization.

[0028] [Average degree of polymerization] Furthermore, the average degree of polymerization of the vinyl chloride resin constituting the vinyl chloride resin particles is preferably 800 or higher, more preferably 1000 or higher, preferably 5000 or lower, more preferably 3000 or lower, and even more preferably 2800 or lower. This is because if the average degree of polymerization of the vinyl chloride resin constituting the vinyl chloride resin particles is above the above lower limit, the physical strength of the vinyl chloride resin molded article formed using the vinyl chloride resin composition can be sufficiently ensured, while for example, the tensile properties, particularly the tensile elongation, can be improved. A vinyl chloride resin molded article with good tensile elongation can be suitably used as an automotive interior material, such as the surface of an automotive instrument panel, which has excellent ductility and breaks as designed without scattering fragments when an airbag inflates and deploys. In addition, if the average degree of polymerization of the vinyl chloride resin constituting the vinyl chloride resin particles is below the above upper limit, the meltability of the vinyl chloride resin composition can be improved. In this invention, the "average degree of polymerization" can be measured in accordance with JIS K6720-2.

[0029] [Average particle size] Furthermore, the average particle size of the vinyl chloride resin particles is usually 30 μm or more, preferably 50 μm or more, more preferably 100 μm or more, preferably 500 μm or less, and more preferably 200 μm or less. This is because if the average particle size of the vinyl chloride resin particles is above the lower limit, the powder fluidity of the vinyl chloride resin composition is further improved. Also, if the average particle size of the vinyl chloride resin particles is below the upper limit, the melting properties of the vinyl chloride resin composition are further improved, and the surface smoothness of the vinyl chloride resin molded article formed using the composition can be improved. In this invention, the "average particle diameter" can be measured as the volume-average particle diameter by laser diffraction, in accordance with JIS Z8825.

[0030] [Content ratio] Furthermore, (a) the content of vinyl chloride resin particles in the vinyl chloride resin is preferably 70% by mass or more, more preferably 80% by mass or more, can be 100% by mass, preferably 95% by mass or less, and more preferably 90% by mass or less. (a) If the content of vinyl chloride resin particles in the vinyl chloride resin is above the lower limit, the tensile elongation can be made good while ensuring sufficient physical strength of the vinyl chloride resin molded article formed using the vinyl chloride resin composition. Also, (a) if the content of vinyl chloride resin particles in the vinyl chloride resin is below the upper limit, the powder flowability of the vinyl chloride resin composition is improved.

[0031] <<Vinyl chloride resin microparticles>> In a vinyl chloride resin composition, vinyl chloride resin fine particles typically function as a dusting agent (powder flow improver). It is preferable that the vinyl chloride resin fine particles be manufactured by emulsion polymerization.

[0032] [Average degree of polymerization] Furthermore, the average degree of polymerization of the vinyl chloride resin constituting the vinyl chloride resin fine particles is preferably 500 or higher, more preferably 700 or higher, preferably 2600 or lower, and more preferably 2400 or lower. This is because if the average degree of polymerization of the vinyl chloride resin constituting the vinyl chloride resin fine particles used as a dusting agent is above the lower limit, the powder fluidity of the vinyl chloride resin composition will be improved, and the tensile elongation of the molded article obtained using the composition will be improved. Also, if the average degree of polymerization of the vinyl chloride resin constituting the vinyl chloride resin fine particles is below the upper limit, the meltability of the vinyl chloride resin composition will be improved, and the surface smoothness of the vinyl chloride resin molded article formed using the composition will be improved.

[0033] [Average particle size] Furthermore, the average particle size of the vinyl chloride resin fine particles is usually less than 30 μm, preferably 10 μm or less, more preferably 5 μm or less, preferably 0.1 μm or more, and more preferably 1 μm or more. If the average particle size of the vinyl chloride resin fine particles is above the lower limit, the powder flowability of the vinyl chloride resin composition can be further improved without excessively reducing the size of the particles used as a dusting agent, for example. Also, if the average particle size of the vinyl chloride resin fine particles is below the upper limit, the melting properties of the vinyl chloride resin composition can be further improved, and the surface smoothness of the formed vinyl chloride resin molded article can be further enhanced.

[0034] [Content ratio] Furthermore, (a) the content of vinyl chloride resin fine particles in the vinyl chloride resin may be 0% by mass, but is preferably 5% by mass or more, more preferably 10% by mass or more, preferably 30% by mass or less, and more preferably 20% by mass or less. (a) If the content of vinyl chloride resin fine particles in the vinyl chloride resin is above the lower limit, the powder flowability of the vinyl chloride resin composition is further improved. Also, (a) if the content of vinyl chloride resin fine particles in the vinyl chloride resin is below the upper limit, the physical strength of the vinyl chloride resin molded article formed using the vinyl chloride resin composition can be further increased.

[0035] <(b) Plasticizers> (b) The plasticizer is not particularly limited, but it is preferable to include at least one of (b1) trimellitic acid ester and (b2) polyester. If the (b) plasticizer used in the vinyl chloride resin composition of the present invention includes at least one of (b1) trimellitic acid ester and (b2) polyester, it is possible to form a vinyl chloride resin molded article that exhibits even better low-temperature tensile elongation after heating. (b) The plasticizer may include (b1) trimellitic acid esters and (b2) other plasticizers other than polyester.

[0036] <<(b1) trimellitic acid ester>> (b) The trimellitic acid ester contained in the plasticizer (b1) is preferably an ester compound of trimellitic acid and a monohydric alcohol.

[0037] Specific examples of the above monohydric alcohols include, but are not limited to, aliphatic alcohols such as 1-hexanol, 1-heptanol, 1-octanol, 2-ethylhexanol, 1-nonanol, 1-decanol, 1-undecanol, and 1-dodecanol. Among these, aliphatic alcohols having 6 to 18 carbon atoms are preferred as monohydric alcohols, and linear aliphatic alcohols having 6 to 18 carbon atoms are more preferred.

[0038] In particular, as the (b1) trimellitic acid ester mentioned above, a triester product obtained by esterifying substantially all of the carboxyl groups of trimellitic acid with the monohydric alcohol described above is preferred. The alcohol residues in the triester product may be derived from the same alcohol or from different alcohols. The trimellitic acid ester described above (b1) may consist of a single compound or a mixture of different compounds.

[0039] Specific examples of suitable (b1) trimellitic acid esters include tri-n-hexyl trimellitic acid, tri-n-heptyl trimellitic acid, tri-n-octyl trimellitic acid, tri-(2-ethylhexyl) trimellitic acid, tri-n-nonyl trimellitic acid, tri-n-decyl trimellitic acid, triisodecyl trimellitic acid, tri-n-undecyl trimellitic acid, tri-n-dodecyl trimellitic acid, trialkyl trimellitic acid esters (esters having two or more alkyl groups with different carbon numbers [however, the number of carbon atoms is between 6 and 18] in the molecule), tri-n-alkyl trimellitic acid esters (esters having two or more alkyl groups with different carbon numbers [however, the number of carbon atoms is between 6 and 18] in the molecule), and mixtures thereof. Specific examples of more preferred (b1) trimellitic acid esters include tri-n-octyl trimellitic acid, tri-(2-ethylhexyl) trimellitic acid, tri-n-nonyl trimellitic acid, tri-n-decyl trimellitic acid, tri-n-alkyl trimellitic acid (esters having two or more alkyl groups with different numbers of carbon atoms [however, the number of carbon atoms is between 6 and 18] in the molecule), and mixtures thereof.

[0040] (b) The content of (b1) trimellitic acid ester in the plasticizer can be 0% by mass or more, preferably 10% by mass or more, more preferably 20% by mass or more, even more preferably 30% by mass or more, and can be 100% by mass or less, preferably 98% by mass or less, and more preferably 97% by mass or less. (b) If the content of (b1) trimellitic acid ester in the plasticizer is within the above range, the low-temperature tensile elongation after heating of the formed vinyl chloride resin molded article can be further increased. The content of (b1) trimellitic acid ester in the plasticizer can also be 50% by mass or more, 60% by mass or more, or 70% by mass or more.

[0041] Furthermore, the content of (b1) trimellitic acid ester in the vinyl chloride resin composition can be 0 parts by mass or more, preferably 10 parts by mass or more, more preferably 20 parts by mass or more, even more preferably 30 parts by mass or more, preferably 150 parts by mass or less, more preferably 120 parts by mass or less, and even more preferably 110 parts by mass or less, per 100 parts by mass of the vinyl chloride resin. If the content of (b) trimellitic acid ester in the vinyl chloride resin composition is within the above range, the low-temperature tensile elongation after heating of the formed vinyl chloride resin molded article can be further increased. The content of (b1) trimellitic acid ester in the vinyl chloride resin composition can also be 60 parts by mass or more, 70 parts by mass or more, or 80 parts by mass or more, per 100 parts by mass of the vinyl chloride resin.

[0042] <<(b2) Polyester>> (b) The (b2) polyester contained in the plasticizer is not particularly limited, and for example, polyesters containing structural units derived from adipic acid (adipic acid-based polyester), polyesters containing structural units derived from sebaciic acid (sebacic acid-based polyester), and polyesters containing structural units derived from phthalic acid (phthalic acid-based polyester) can be used. These polyesters may be used individually or two or more in any ratio. In particular, from the viewpoint of further increasing the low-temperature tensile elongation of the formed polyvinyl chloride resin molded article after heating, it is preferable to use a polyester containing structural units derived from adipic acid as the (b2) polyester, and it is especially preferable to use a polyester containing structural units derived from adipic acid and structural units derived from 3-methyl-1,5-pentanediol.

[0043] For the sake of explanation, polyesters containing structural units derived from adipic acid and structural units derived from 3-methyl-1,5-pentanediol will be referred to as "Polyester A". Here, polyester A containing the above-mentioned predetermined structural units may have structural units other than those derived from adipic acid and 3-methyl-1,5-pentanediol, but it is preferable that the total of structural units derived from adipic acid and 3-methyl-1,5-pentanediol is 50% by mass or more of the total structural units, and more preferably 80% by mass or more. Furthermore, it is preferable that polyester A containing the above-mentioned predetermined structural units has only structural units derived from adipic acid and 3-methyl-1,5-pentanediol as repeating units.

[0044] Polyester A containing the above-mentioned predetermined structural units can be obtained by condensation polymerization of adipic acid and 3-methyl-1,5-pentanediol, without any particular limitations. The above-mentioned condensation polymerization can be carried out in the presence of a catalyst. Furthermore, the above-mentioned condensation polymerization can be carried out using an alcohol and / or a monobasic acid as the end-termination component. In addition, the condensation polymerization of adipic acid and 3-methyl-1,5-pentanediol and the termination reaction between the obtained condensation polymer and the above-mentioned end-termination component may be carried out together or separately. Furthermore, the product obtained through condensation polymerization and the termination reaction may be subjected to post-treatment such as distillation. Known conditions can be used as reaction conditions for condensation polymerization, such as the amounts of monomers, catalysts and end-termination components used. Furthermore, commercially available polyester A containing the above-mentioned predetermined structural units may be used.

[0045] The catalyst used in the condensation polymerization reaction is not particularly limited, but examples include dibutyltin oxide and tetraalkyl titanate.

[0046] Alcohols that can be used as end-stopping components include, for example, methanol, ethanol, propanol, isopropanol, butanol, isobutanol, pentanol, hexanol, isohexanol, heptanol, isoheptanol, octanol, isooctanool, 2-ethylhexanol, nonanol, isononanol, decanol, isodecanol, undecanol, isoundodecanol, dodecanol, tridecanol, isotridecanol, tetradecanol, pentadecanol, hexadecanol, heptadecanol, octadecanol, cellosolve, carbitol, phenol, nonylphenol, benzyl alcohol, and mixtures thereof. Furthermore, monobasic acids that can be used as terminal termination components include, for example, acetic acid, propionic acid, butyric acid, isobutyric acid, valeric acid, pivalic acid, caproic acid, heptanoic acid, caprylic acid, 2-ethylhexyl acid, pelargonic acid, capric acid, undecanoic acid, lauric acid, tridecanoic acid, myristic acid, pentadecanoic acid, palmitic acid, heptadecanoic acid, stearic acid, benzoic acid, and mixtures thereof. Among these, 2-ethylhexanol is preferred as the terminal termination component.

[0047] Furthermore, the polyester A containing the above-mentioned predetermined structural units preferably has a number average molecular weight of 1000 or more, more preferably 2000 or more, preferably 10000 or less, and more preferably 7000 or less. The number-average molecular weight can be measured using the VPO (vapor pressure osmotic pressure) method. Furthermore, the polyester A containing the above-mentioned predetermined structural units preferably has an acid value of 1 or less. Furthermore, it is preferable that polyester A containing the above-mentioned predetermined structural units has a hydroxyl value of 30 or less.

[0048] Furthermore, the polyester A containing the above-mentioned predetermined structural units preferably has a viscosity of 500 mPa·s or more, more preferably 1000 mPa·s or more, preferably 8000 mPa·s or less, and more preferably 5000 mPa·s or less. Viscosity can be measured at a temperature of 23°C, in accordance with JIS Z8803.

[0049] (b) The content of (b2) polyester in the plasticizer may be 0% by mass or more, 20% by mass or more, 40% by mass or more, or 60% by mass or more. Furthermore, (b) the content of (b2) polyester in the plasticizer can be 100% by mass or less, preferably 90% by mass or less, more preferably 80% by mass or less, and even more preferably 70% by mass or less. (b) If the content of (b2) polyester in the plasticizer is below the above upper limit, the low-temperature tensile elongation of the formed vinyl chloride resin molded article after heating can be further increased.

[0050] Furthermore, the content of (b2) polyester in the vinyl chloride resin composition may be 0 parts by mass or more, 10 parts by mass or more, 20 parts by mass or more, 40 parts by mass or more, or 60 parts by mass or more, based on 100 parts by mass of the (a) vinyl chloride resin. Furthermore, the content of (b2) polyester in the vinyl chloride resin composition can be 100 parts by mass or less per 100 parts by mass of the (a) vinyl chloride resin, preferably 90 parts by mass or less, more preferably 80 parts by mass or less, and even more preferably 70 parts by mass or less. If the content of (b2) polyester in the vinyl chloride resin composition is below the above upper limit, the low-temperature tensile elongation of the formed vinyl chloride resin molded article after heating can be further increased.

[0051] Furthermore, the total content of (b1) trimellitic acid ester and (b2) polyester in the vinyl chloride resin composition is preferably 30 parts by mass or more, more preferably 50 parts by mass or more, even more preferably 70 parts by mass or more, even more preferably 90 parts by mass or more, preferably 200 parts by mass or less, more preferably 180 parts by mass or less, even more preferably 160% by mass or less, and even more preferably 140% by mass or less. If the total content of (b1) trimellitic acid ester and (b2) polyester in the vinyl chloride resin composition is within the above predetermined range, the low-temperature tensile elongation of the formed vinyl chloride resin molded article after heating can be further increased.

[0052] <<(b3) Other plasticizers>> The (b) plasticizer contained in the vinyl chloride resin composition may optionally include plasticizers other than the (b1) trimellitic acid ester and (b2) polyester described above (sometimes referred to as "(b3) other plasticizers").

[0053] (b3) Specific examples of other plasticizers include plasticizers other than (b1) trimellitic acid esters and (b2) polyesters described above, as described in International Publication No. 2016 / 098344. In particular, it is preferable to use epoxidized soybean oil from the viewpoint of further improving the flexibility of the formed vinyl chloride resin molded article at low temperatures.

[0054] (b) The content of the other plasticizers (b3) in the plasticizer is not particularly limited, but is preferably 0% by mass or more and 5% by mass or less. (b) If the content of the other plasticizers (b3) in the plasticizer is within the above range, the low-temperature tensile elongation of the formed vinyl chloride resin molded article after heating can be further increased.

[0055] Furthermore, the content of the above-mentioned (b3) other plasticizers in the vinyl chloride resin composition is not particularly limited, but it can be 0 parts by mass or more and 5 parts by mass or less per 100 parts by mass of the above-mentioned (a) vinyl chloride resin.

[0056] The total content of (b1) trimellitic acid ester, (b2) polyester, and (b3) other plasticizers in the vinyl chloride resin composition (i.e., the content of (b) plasticizers) is preferably 30 parts by mass or more, more preferably 50 parts by mass or more, even more preferably 70 parts by mass or more, even more preferably 90 parts by mass or more, preferably 205 parts by mass or less, more preferably 185 parts by mass or less, even more preferably 165% by mass or less, and even more preferably 145% by mass or less. If the content of (b) plasticizers in the vinyl chloride resin composition is within the above predetermined range, the low-temperature tensile elongation after heating of the formed vinyl chloride resin molded article can be further increased.

[0057] <(c) Predetermined ionic compound> The (c) predetermined ionic compound contained in the vinyl chloride resin composition of the present invention consists of a cation containing nitrogen or phosphorus and an anion containing fluorine. By using the above (c) predetermined ionic compound in the vinyl chloride resin composition, a vinyl chloride resin molded article with excellent low-temperature tensile elongation after heating can be formed.

[0058] Examples of nitrogen-containing cations include methyltrioctylammonium ions and 1-hexyl-4-methylpyridinium ions. Furthermore, examples of phosphorus-containing cations include quaternary phosphonium ions such as tributyldodecylphosphonium, tetrabutylphosphonium, and trihexyltetradecylphosphonium ions. (c) The specified ionic compound may contain one of these nitrogen or phosphorus-containing cations alone, or it may contain two or more in any ratio. In particular, from the viewpoint of suppressing fluctuations in the initial color tone when the vinyl chloride resin composition is molded, (c) the cation constituting the predetermined ionic compound is preferably a quaternary phosphonium ion, and more preferably a tributyldodecylphosphonium ion.

[0059] Furthermore, examples of fluorine-containing anions include bis(trifluoromethanesulfonyl)imide ions and hexafluorophosphate ions. (c) The specified ionic compound may contain one of these fluorine-containing anions alone, or two or more in any ratio. In particular, from the viewpoint of suppressing fluctuations in the initial color tone when the vinyl chloride resin composition is molded, (c) the anion constituting the predetermined ionic compound is preferably a bis(trifluoromethanesulfonyl)imide ion.

[0060] Furthermore, the ionic compound specified in (c) above may be a so-called "ionic liquid" having a melting point of 100°C or lower.

[0061] Furthermore, specific examples of the ionic compounds specified in (c) above include, for example, the ionic compounds shown in the following formulas (1) to (6).

[0062] [ka]

[0063] Formula (1) represents methyltrioctylammonium bis(trifluoromethanesulfonyl)imide (CAS No. 375395-33-8), formula (2) represents tributyldodecylphosphonium bis(trifluoromethanesulfonyl)imide (CAS No. 1002754-39-3), formula (3) represents tetrabutylphosphonium bis(trifluoromethanesulfonyl)imide (CAS No. 547718-93-4), formula (4) represents trihexyltetradecylphosphonium bis(trifluoromethylsulfonyl)imide (CAS No. 460092-03-9), formula (5) represents 1-hexyl-4-methylpyridinium bis(trifluoromethanesulfonyl)imide (CAS No. 870296-13-2), and formula (6) represents methyltrioctylammonium hexafluorophosphate (CAS This refers to No. 569652-37-5). In particular, from the viewpoint of suppressing fluctuations in the initial color tone when the vinyl chloride resin composition is molded, it is especially preferable to use tributyldodecylphosphonium bis(trifluoromethanesulfonyl)imide represented by formula (2).

[0064] Furthermore, from the viewpoint of further increasing the low-temperature tensile elongation of the formed vinyl chloride resin molded article after heating, the content of (c) predetermined ionic compound in the vinyl chloride resin composition is preferably 0.01 parts by mass or more, more preferably 0.05 parts by mass or more, even more preferably 0.08 parts by mass or more, preferably 5 parts by mass or less, more preferably 4 parts by mass or less, and even more preferably 3 parts by mass or less, based on 100 parts by mass of the vinyl chloride resin. Furthermore, from the viewpoint of suppressing fluctuations in the initial color tone when the vinyl chloride resin composition is molded, the content of (c) predetermined ionic compound in the vinyl chloride resin composition is preferably 0.10 parts by mass or more, more preferably 0.15 parts by mass or more, preferably 1.00 parts by mass or less, and even more preferably 0.50 parts by mass, based on 100 parts by mass of the vinyl chloride resin.

[0065] <Additives> The vinyl chloride resin composition of the present invention may further contain various additives in addition to the components described above. Examples of additives, without particular limitation, include lubricants; stabilizers such as perchloric acid-treated hydrotalcite, zeolite, β-diketone, and fatty acid metal salts; release agents; other dusting agents other than the vinyl chloride resin fine particles; impact resistance modifiers; perchloric acid compounds other than perchloric acid-treated hydrotalcite (such as sodium perchlorate and potassium perchlorate); antioxidants; antifungal agents; flame retardants; antistatic agents; fillers; light stabilizers; foaming agents; pigments; and the like.

[0066] Furthermore, as the above-mentioned additives that the vinyl chloride resin composition of the present invention may contain, for example, those described in International Publication No. 2016 / 098344 can be used, and the preferred content thereof can be the same.

[0067] In particular, to achieve a desired color for the formed vinyl chloride resin molded article, pigments such as carbon black (a black pigment) and titanium(IV) oxide (titanium dioxide) (a white pigment) can be used.

[0068] <Method for preparing a vinyl chloride resin composition> The vinyl chloride resin composition of the present invention can be prepared by mixing the above-mentioned components. Here, the method of mixing (a) vinyl chloride resin, (b) plasticizer, (c) a predetermined ionic compound, and various additives that may be further added as needed is not particularly limited, but for example, a method in which the components excluding the dusting agent (containing vinyl chloride resin fine particles) are mixed by dry blending, and then the dusting agent is added and mixed. Here, the use of a Henschel mixer is preferred for dry blending. The temperature during dry blending is not particularly limited, but is preferably 50°C or higher, more preferably 70°C or higher, and preferably 200°C or lower.

[0069] <Uses of vinyl chloride resin compositions> The resulting vinyl chloride resin composition can be suitably used in powder molding, and is particularly suitable for use in powder slush molding.

[0070] (Vinyl chloride resin molded product) The vinyl chloride resin molded article of the present invention is characterized by being obtained by molding the above-described vinyl chloride resin composition by any method. Furthermore, since the vinyl chloride resin molded article of the present invention is formed using the above-described vinyl chloride resin composition, it usually contains at least (a) vinyl chloride resin, (b) a plasticizer, and (c) a predetermined ionic compound, and exhibits excellent low-temperature tensile elongation after heating. Therefore, the polyvinyl chloride resin molded article of the present invention can be suitably used as an automotive interior material such as the surface of an automotive instrument panel, which has excellent ductility and breaks as designed without scattering fragments when an airbag inflates and deploys, even when subjected to low temperatures after being subjected to high temperatures.

[0071] <Method for forming a polyvinyl chloride resin molded product> Here, when forming a polyvinyl chloride resin molded body by powder slush molding, the mold temperature during powder slush molding is not particularly limited, but is preferably 200°C or higher, more preferably 220°C or higher, preferably 300°C or lower, and more preferably 280°C or lower.

[0072] Furthermore, when manufacturing a vinyl chloride resin molded article, the following method can be used without particular limitation. That is, the vinyl chloride resin composition of the present invention is sprinkled onto a mold at the above temperature range, left for 5 seconds to 30 seconds, the excess vinyl chloride resin composition is shaken off, and then left for 30 seconds to 3 minutes at any temperature. After that, the mold is cooled to 10°C to 60°C, and the obtained vinyl chloride resin molded article of the present invention is demolded from the mold. A sheet-like molded article that conforms to the shape of the mold is then obtained.

[0073] (Laminated structure) The laminate of the present invention comprises a foamed polyurethane molded body and the vinyl chloride resin molded body described above. The vinyl chloride resin molded body typically constitutes one of the surfaces of the laminate. Furthermore, the laminate of the present invention is formed using, for example, the vinyl chloride resin composition of the present invention, and has a vinyl chloride resin molded article with excellent low-temperature tensile elongation after heating, making it suitable for use as an automotive interior part, particularly as an automotive interior material for forming an automotive instrument panel.

[0074] Here, the method for laminating the foamed polyurethane molded body and the polyvinyl chloride resin molded body is not particularly limited, and for example, the following methods can be used. Specifically, (1) a method of preparing the foamed polyurethane molded body and the polyvinyl chloride resin molded body separately and then bonding them together by heat fusion, heat bonding, or using known adhesives; (2) a method of directly forming a foamed polyurethane molded body on the polyvinyl chloride resin molded body by reacting isocyanates and polyols, which are raw materials for the foamed polyurethane molded body, on the polyvinyl chloride resin molded body to carry out polymerization, and by foaming the polyurethane using a known method. Among these, the latter method (2) is preferred because the process is simple and it is easy to firmly bond the polyvinyl chloride resin molded body and the foamed polyurethane molded body even when obtaining laminates of various shapes. [Examples]

[0075] The present invention will be described in detail below based on examples, but the present invention is not limited to these examples. In the following description, "%" and "parts" used to express quantities refer to mass unless otherwise specified. The low-temperature tensile elongation and initial color variation of the polyvinyl chloride resin molded articles were measured and evaluated using the following methods.

[0076] <Low-temperature tensile stress> [Before heating (initial stage)] The obtained polyvinyl chloride resin molded sheets were punched out using a No. 1 dumbbell as described in JIS K6251, and the tensile elongation at break (%) at a tensile speed of 200 mm / min and a low temperature of -20°C was measured in accordance with JIS K7113. The larger the value of the tensile elongation at break, the better the low-temperature tensile elongation of the polyvinyl chloride resin molded sheet before heating (initial stage). [After heating (thermal aging test)] A laminate with a foamed polyurethane molded body on the back was used as a sample. The sample was placed in an oven and heated for 1200 hours in an environment at a temperature of 120°C. Next, the foamed polyurethane molded body was peeled off from the heated laminate, and only the vinyl chloride resin molded sheet was prepared. Then, under the same conditions as in the above initial case, the tensile elongation at break (%) of the vinyl chloride resin molded sheet after heating for 1200 hours was measured. The larger the value of the tensile elongation at break, the better the vinyl chloride resin molded sheet is in terms of low-temperature tensile elongation after heating.

[0077] <Variation in initial color tone> The obtained vinyl chloride resin composition was poured onto a textured mold heated to 240°C, left to melt for an arbitrary time, and then the excess vinyl chloride resin composition was shaken off. Thereafter, the textured mold onto which the vinyl chloride resin composition was poured was left standing in an oven set at 200°C, and when 60 seconds had elapsed since the start of standing, the textured mold was cooled with cooling water. When the mold temperature was cooled to 40°C, a 145 mm × 175 mm × 1 mm vinyl chloride resin molded sheet as a vinyl chloride resin molded body was demolded from the mold. Molding was performed in the same manner as above except that the temperature of the mold was increased by 10°C from 240°C, and molding was carried out up to a mold temperature of 270°C. The color tones of the molded bodies obtained by molding at mold temperatures of 240, 250, 260, and 270°C were measured at 9 points on each molded body using a "CM-700d" manufactured by Konica Minolta under a C light source in the CIE color system (L * , a * , b * ), and the average value was obtained. Then, using the formula: ΔE = 〔(ΔL * ) 2 +(Δa * ) 2 +(Δb * ) 2 〕 1 / 2 the color difference ΔE based on the color tone at a mold temperature of 240°C was calculated. The smaller the color difference ΔE, the smaller the variation in the initial color tone due to the influence of the mold temperature when molding the vinyl chloride resin composition, which means that the vinyl chloride resin molded body obtained by molding is less likely to discolor.

[0078] (Production Example) The polyesters used in the examples and comparative examples were prepared as follows. <Polyester A> Adipic acid as a polycarboxylic acid, 3-methyl-1,5-pentanediol as a polyhydric alcohol, and 2-ethylhexanol as a stopper (end termination component) were charged into a reaction vessel. Tetraisopropyl titanate was added as a catalyst, and solvents were added as needed. The mixture was heated while stirring. By-product water was removed under atmospheric pressure and reduced pressure, and the temperature was finally raised to 220-230°C to complete the dehydration condensation reaction. The resulting product was subjected to thin-film distillation under pressure of 4-80 Pa and a sheath temperature of 250°C to obtain polyester A (viscosity: 3600 mPa·s, number average molecular weight: 5300, acid value: 0.32, hydroxyl value: 12.7) with 2-ethylhexoxy groups at the ends.

[0079] (Example 1-1) <Preparation of vinyl chloride resin composition> Of the components shown in Table 1, all components except the plasticizer and the vinyl chloride resin fine particles used as a dusting agent were mixed in a Henschel mixer. When the temperature of the mixture rose to 80°C, all of the plasticizer was added and the mixture was dried up (this refers to the state in which the plasticizer is absorbed by the vinyl chloride resin particles, resulting in a free-flowing mixture). Subsequently, when the dried mixture cooled to a temperature of 70°C or below, the vinyl chloride resin fine particles used as a dusting agent were added to prepare the vinyl chloride resin composition. <Formation of polyvinyl chloride resin molded product> A polyvinyl chloride resin molded sheet with dimensions of 200 mm x 300 mm x 1 mm was prepared as follows. Specifically, the vinyl chloride resin composition obtained above was sprinkled onto a textured mold heated to 250°C, left to melt for a specified time, and then the excess vinyl chloride resin composition was shaken off. Subsequently, the textured mold on which the vinyl chloride resin composition had been sprinkled was placed in an oven set to 200°C, and after 60 seconds had elapsed, the textured mold was cooled with cooling water. When the mold temperature had cooled to 40°C, the vinyl chloride resin molded sheet, which was to be used as a vinyl chloride resin molded product, was demolded from the mold. Then, the low-temperature tensile elongation of the obtained polyvinyl chloride resin molded sheet (dimensions: 200 mm × 300 mm × 1 mm) was measured and evaluated before heating (initial state) according to the method described above. The results are shown in Table 1. <Formation of laminates> The resulting polyvinyl chloride resin molded sheet (dimensions: 200mm x 300mm x 1mm) was placed in a mold measuring 200mm x 300mm x 10mm, with the textured side facing down. Separately, a polyol mixture was obtained by mixing 50 parts of propylene glycol PO (propylene oxide)·EO (ethylene oxide) block adduct (hydroxyl value 28, terminal EO unit content = 10%, internal EO unit content = 4%), 50 parts of glycerin PO·EO block adduct (hydroxyl value 21, terminal EO unit content = 14%), 2.5 parts of water, 0.2 parts of triethylenediamine ethylene glycol solution (manufactured by Tosoh Corporation, product name "TEDA-L33"), 1.2 parts of triethanolamine, 0.5 parts of triethylamine, and 0.5 parts of a foam stabilizer (manufactured by Shin-Etsu Chemical Co., Ltd., product name "F-122"). A mixture was also prepared by mixing the obtained polyol mixture with polymethylene polyphenylene polyisocyanate (polymeric MDI) in a ratio that resulted in an index of 98. The prepared mixture was then poured onto the vinyl chloride resin molding sheet laid in the mold as described above. Subsequently, the mold was sealed by covering it with an aluminum plate measuring 348mm x 255mm x 10mm. After sealing the mold, it was left for 5 minutes, during which the polyvinyl chloride resin molded sheet (thickness: 1mm) formed a foamed polyurethane molded body (thickness: 9mm, density: 0.2g / cm³). 3 A laminated structure was formed, backed by ). The formed laminate was then removed from the mold, and the low-temperature tensile elongation of the polyvinyl chloride resin molded sheet in the laminate was measured and evaluated after heating (thermal aging test) according to the method described above. The results are shown in Table 1.

[0080] (Examples 1-2 to 1-11) Except for changing the type and amount of ionic compound used as shown in Table 1, vinyl chloride resin compositions, vinyl chloride resin molded articles, and laminates were prepared in the same manner as in Example 1-1. Measurements and evaluations were then performed in the same manner as in Example 1-1. The results are shown in Table 1.

[0081] (Comparative Example 1-1) A vinyl chloride resin composition, a vinyl chloride resin molded article, and a laminate were prepared in the same manner as in Example 1-1, except that ionic compounds were not used. Measurements and evaluations were then performed in the same manner as in Example 1-1. The results are shown in Table 1.

[0082] [Table 1]

[0083] 1) Manufactured by Shin-Daiichi Vinyl Chloride Co., Ltd., product name "ZEST(registered trademark) 2000" (prepared by suspension polymerization, average degree of polymerization: 2000, average particle size: 134 μm) 2) Shin-Daiichi Vinyl Chloride Co., Ltd., product name "ZEST PQLTX" (prepared by emulsion polymerization, average degree of polymerization: 800, average particle size: 1.8 μm) 3) Manufactured by Kao Corporation, product name "Trimex N-08" 4) ADEKA Corporation, product name "ADEKA Sizer O-130S" 5) Manufactured by Kyowa Chemical Industry Co., Ltd., product name "Alkamizer (registered trademark) 5" 6) Manufactured by Mizusawa Chemical Industry Co., Ltd., product name "MIZUKALIZER DS" 7) Manufactured by Showa Denko Corporation, product name "Kalens DK-1" 8) ADEKA Corporation, product name "ADEKA Stub SC-131" 9) ADEKA Corporation, product name "ADEKA Stub LA-72" 10) Sakai Chemical Industry Co., Ltd., product name "SAKAI SZ2000" 11) ADEKA Corporation, product name "ADEKA Stub LS-12" 12) Manufactured by Dainichi Seika Co., Ltd., product name "DA PX 1720(A) Black"

[0084] (Example 2-1) A vinyl chloride resin composition was prepared in the same manner as in Example 1-1, except that the constituent components were changed to those shown in Table 2. Then, the variation in initial color tone was measured and evaluated using the obtained vinyl chloride resin composition according to the method described above. The results are shown in Table 2.

[0085] (Examples 2-2 to 2-4) A vinyl chloride resin composition was prepared in the same manner as in Example 2-1, except that the amount of ionic compound 2 used was changed as shown in Table 2. Measurement and evaluation were then performed in the same manner as in Example 2-1. The results are shown in Table 2.

[0086] (Comparative Example 2-1) A vinyl chloride resin composition was prepared in the same manner as in Example 2-1, except that ionic compound 2 was not used. Measurement and evaluation were then performed in the same manner as in Example 2-1. The results are shown in Table 2.

[0087] [Table 2]

[0088] 13) Manufactured by Shin-Daiichi Vinyl Chloride Co., Ltd., product name "ZEST(registered trademark) 1700ZI" (prepared by suspension polymerization, average degree of polymerization: 1700, average particle size: 129 μm) 14) Shin-Daiichi Vinyl Chloride Co., Ltd., product name "ZEST PQLTX" (prepared by emulsion polymerization, average degree of polymerization: 800, average particle size: 1.8 μm) 15) Manufactured by Kao Corporation, product name "Trimex N-08" 16) ADEKA Corporation, product name "ADEKA Sizer O-130S" 17) Manufactured by Kyowa Chemical Industry Co., Ltd., product name "Alkamizer (registered trademark) 5" 18) Manufactured by Mizusawa Chemical Industry Co., Ltd., product name "MIZUKALIZER DS" 19) Manufactured by Showa Denko Corporation, product name "Kalens DK-1" 20) ADEKA Corporation, product name "ADEKA Stub SC-131" 21) ADEKA Corporation, product name "ADEKA Stub LA-72" 22) Sakai Chemical Industry Co., Ltd., product name "SAKAI SZ2000" 23) ADEKA Corporation, product name "ADEKA Stub LS-12" 24) Shin-Etsu Silicone Co., Ltd., product name "KF-96H-300,000 cs" (unmodified silicone oil (polydimethylsiloxane), viscosity: 30 x 10 4 (cs) 25) Manufactured by Dainichi Seika Co., Ltd., product name "DA P-1050 White" 26) Manufactured by Dainichi Seika Co., Ltd., product name "DA PX 1720(A) Black"

[0089] Table 1 shows that the vinyl chloride resin compositions of Examples 1-1 to 1-11, which contain vinyl chloride resin, a plasticizer, and a predetermined ionic compound, yield vinyl chloride resin molded articles with excellent low-temperature tensile elongation after heating. On the other hand, it can be seen that the vinyl chloride resin molded article obtained by molding the vinyl chloride resin composition of Comparative Example 1-1, which does not contain the specified ionic compound, is inferior in low-temperature tensile elongation after heating. Furthermore, as can be seen from Table 2, if the vinyl chloride resin compositions of Examples 2-1 to 2-5, which contain an ionic compound in which the cation is a quaternary phosphonium ion and the anion is a bis(trifluoromethylsulfonyl)imide ion, are used as the predetermined ionic compound, the variation in initial color tone during molding can be suppressed compared to the vinyl chloride resin composition of Comparative Example 2-1, which does not contain the predetermined ionic compound. [Industrial applicability]

[0090] According to the present invention, it is possible to provide a vinyl chloride resin composition capable of forming a vinyl chloride resin molded article that exhibits excellent low-temperature tensile elongation after heating. Furthermore, according to the present invention, it is possible to provide a polyvinyl chloride resin molded article that exhibits excellent low-temperature tensile elongation after heating. Furthermore, according to the present invention, a laminate comprising the vinyl chloride resin molded body can be provided.

Claims

1. It contains polyvinyl chloride resin, a plasticizer, and an ionic compound. The aforementioned ionic compound consists of a cation containing nitrogen or phosphorus and an anion containing fluorine. The cation is methyltrioctylammonium ion, 1-hexyl-4-methylpyridinium ion, tributyldodecylphosphonium, tetrabutylphosphonium, or trihexyltetradecylphosphonium ion. The anion is a bis(trifluoromethanesulfonyl)imide ion or a hexafluorophosphate ion. The content of the ionic compound is 0.01 parts by mass or more and 5 parts by mass or less per 100 parts by mass of the vinyl chloride resin. Unlike the ionic compound, the aforementioned plasticizer The plasticizer comprises at least one of trimellitic acid ester and polyester. A vinyl chloride resin composition in which the total content of the trimellitic acid ester and the polyester in the vinyl chloride resin composition is 30 parts by mass or more and 200 parts by mass or less per 100 parts by mass of the vinyl chloride resin.

2. The plasticizer comprises at least the polyester, The vinyl chloride resin composition according to claim 1, wherein the polyester contains structural units derived from adipic acid and structural units derived from 3-methyl-1,5-pentanediol.

3. A vinyl chloride resin composition according to claim 1 or 2, used for powder molding.

4. A vinyl chloride resin composition according to any one of claims 1 to 3, used in powder slush molding.

5. A vinyl chloride resin molded article obtained by molding a vinyl chloride resin composition according to any one of claims 1 to 4.

6. A polyvinyl chloride resin molded article according to claim 5, for use as the surface material of an automotive instrument panel.

7. A laminate comprising a foamed polyurethane molded body and a vinyl chloride resin molded body according to claim 5 or 6.

8. The laminate according to claim 7, for use in an automotive instrument panel.

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