TW202014460A - Plasticizer for vinyl chloride resin, vinyl chloride resin composition, electric wire, and vehicle interior material - Google Patents

Abstract

The present invention provides a plasticizer for vinyl chloride resins which has good compatibility with vinyl chloride resins, and further which may be used to provide a vinyl chloride resin composition capable of being formed into an article having excellent cold resistance and heat resistance. The present invention relates to a plasticizer for vinyl chloride resins, including (A1) an ester compound produced by reaction of (a1) at least one compound selected from the group consisting of divalent to tetravalent aromatic carboxylic acids, and alkyl esters and anhydrides thereof, with (a2) an alcohol mixture containing 2-propylheptanol, n-decanol, and n-dodecanol.

Description

Plasticizer for vinyl chloride resin, vinyl chloride resin composition, wire and vehicle interior materials

The present invention relates to a plasticizer grease for vinyl chloride resin, which has good compatibility with vinyl chloride resin, and it can be further used to provide a vinyl chloride resin composition, which can be formed with excellent cold resistance And heat-resistant objects. The invention also relates to a vinyl chloride resin composition containing a plasticizer for vinyl chloride resin; an electric wire formed from the vinyl chloride resin composition; and a vehicle interior formed from the vinyl chloride resin composition Material related.

Vinyl chloride resins are usually used in vinyl chloride resin compositions to which plasticizers have been added, and not only to introduce various properties such as flexibility, but also in various forming processes such as extrusion and calendering to reduce the operating temperature to promote Forming process.

The plasticizer used in such a vinyl chloride resin composition preferably has advantageous characteristics, such as excellent compatibility with vinyl chloride resin, and makes objects formed from the vinyl chloride resin composition excellent Heat resistance and cold resistance (see, for example, WO 2017/030000).

Typical examples of plasticizers used in vinyl chloride resin compositions include alkyl esters of polybasic acids, such as phthalates, adipates, and trimellitates, which can be used individually Or use in a combination of two or more. In conventional techniques, such as general-purpose phthalates of di-2-ethylhexyl phthalate (DOP) or diisononyl phthalate (DINP), in heat resistance and cold resistance It has an excellent balance between properties and is often used in vinyl chloride resin compositions for electrical wires (eg, vehicle wiring harnesses), vehicle interior materials (eg, vehicle interior leather), and similar applications. However, in recent years, the demand for cold resistance or heat resistance has become stronger and stronger, and the above-mentioned plasticizers still cannot meet these demands.

It is generally known that C10 or higher carbon alcohols greater than the above plasticizers, especially linear alcohols, can be used to improve cold resistance or heat resistance.

However, the use of straight-chain alcohols with carbon orders of C10 or higher will not provide the required properties such as cold resistance or heat resistance due to the reduced compatibility with vinyl chloride resins. Therefore, there is still a need to develop plasticizers for vinyl chloride resins with excellent flexibility, compatibility, heat resistance, and cold resistance.

An object of the present invention is to provide a plasticizer for vinyl chloride resin, which has good compatibility with vinyl chloride resin, and is further used to provide a vinyl chloride resin composition, which can be formed to have excellent cold resistance and heat resistance Objects. Another object of the present invention is to provide an electric wire (such as a wire harness) and a vehicle interior material (such as a vehicle interior leather), which includes a vinyl chloride resin composition.

After extensive research, the inventors of the present case found that: the ester compound generated from a specific alcohol mixture can be used as a plasticizer for vinyl chloride resin; the composition containing the ester compound and vinyl chloride resin can It is used to form objects with heat resistance and cold resistance, that is, they can maintain plasticity even when exposed to high or low temperature environments; the ester compound has good compatibility with vinyl chloride resin, and even After being exposed to a high or low temperature environment for a long period of time, it can still allow vinyl chloride resin to maintain its plasticity; and the composition can be preferably used to form a vehicle interior material (such as vehicle interior Leather), or materials coated with wires (such as wire harnesses), etc. This discovery enables the invention to be completed.

Specifically, the present invention relates to a plasticizer for vinyl chloride resin, which includes A1) by a1) at least one selected from divalent to tetravalent aromatic carboxylic acids, and alkyl esters thereof Compounds composed of acid anhydride; react with a2) alcohol mixture containing 2-propylheptanol, n-decanol and n-dodecyl alcohol to produce ester compounds.

The compound a1) is preferably at least one selected from the group consisting of phthalic acid, isophthalic acid, terephthalic acid, alkyl esters thereof, and phthalic anhydride One.

On the basis that the mixture is 100 mol%, the alcohol mixture a2) preferably contains 20 to 70 mol% of 2-propylheptanol, 10 to 60 mol% of n-decyl alcohol, and 20 To 70 mol% of n-dodecyl alcohol.

On the basis that the mixture is 100 mol%, the alcohol mixture a2) preferably contains 20 to 50 mol% of 2-propylheptanol, 10 to 60 mol% of n-decyl alcohol, and 20~50 mol% of n-dodecyl alcohol.

The alcohol mixture a2) preferably has an average carbon number of 10.4 to 11.4, more preferably 10.4 to 11.0.

The alcohol mixture a2) preferably has an average linearity of 50 to 95%, more preferably 60 to 85%.

The invention also relates to a vinyl chloride resin composition, which comprises: X) a plasticizer of vinyl chloride resin; and Y) a vinyl chloride resin.

The plasticizer X) of the vinyl chloride resin is preferably present at a content of 10 to 100 parts by mass per 100 parts by mass of vinyl chloride resin Y).

The invention also relates to an electric wire including a wire coated with the vinyl chloride resin composition.

The invention also relates to a vehicle interior material, which is formed of a vinyl chloride resin composition.

The plasticizer of the vinyl chloride resin of the present invention has good compatibility with the vinyl chloride resin, and can be used to provide a vinyl chloride resin composition that can maintain plasticity even when exposed to high or low temperature environments. Furthermore, the vinyl chloride resin composition of the present invention can be used in various applications such as wire coating materials, automobile parts, leather, boots, gaskets and hoses. The vinyl chloride resin composition of the present invention is particularly suitable as a forming material for wire coating materials, especially for manufacturing wire harnesses, and for producing vehicle interior materials such as vehicle interior leather.

The plasticizer of the vinyl chloride resin used in the present invention includes A1) by a1) at least one selected from the group consisting of divalent to tetravalent aromatic carboxylic acids, and alkyl esters and anhydrides thereof Compound; and a2) 2-propylheptanol, n-decyl alcohol and n-dodecyl alcohol alcohol mixture, the resulting ester compound.

The ester compound A1) prepared from the alcohol mixture a2) is a mixture of ester compounds.

Examples of the divalent aromatic carboxylic acid (aromatic dicarboxylic acid), aromatic dicarboxylic acid alkyl ester and aromatic dicarboxylic acid anhydride include phthalic acid, 4-methylphthalic acid, m Phthalic acid, terephthalic acid and their alkyl esters, and anhydrides of phthalic acid or 4-methylphthalic acid. Which is preferably one or more compounds selected from the group consisting of phthalic acid, isophthalic acid, terephthalic acid, alkyl esters thereof, and phthalic anhydride, and The alkyl esters of phthalic anhydride or isophthalic acid are better because they help to provide excellent compatibility with vinyl chloride resins and can be formed to have excellent heat resistance And vinyl chloride resin composition of cold-resistant articles. These aromatic dicarboxylic acids, alkyl esters of aromatic dicarboxylic acids, and aromatic dicarboxylic anhydrides may be used alone or in combination of two or more.

Examples of the trivalent aromatic carboxylic acid (aromatic tricarboxylic acid), alkyl ester of aromatic tricarboxylic acid, and aromatic tricarboxylic anhydride include 1,3,5-benzenetricarboxylic acid, 1,2, 4-benzenetricarboxylic acid, 1,2,3-benzenetricarboxylic acid, 3-methyl-1,2,4- Trimellitic acid, 3,5-dimethyl-1,2,4-benzenetricarboxylic acid, 3,5,6-trimethyl-1,2,4-benzenetricarboxylic acid, and their alkyl esters and Acid anhydride. Among them, the preferred one is one or more compounds selected from the group consisting of 1,2,4-benzenetricarboxylic acid and its alkyl esters and acid anhydrides, because they are helpful to provide Excellent compatibility, and a vinyl chloride resin composition that can be used to form articles having excellent heat resistance and cold resistance. These aromatic tricarboxylic acids, alkyl esters of aromatic tricarboxylic acids, and aromatic tricarboxylic anhydrides may be used alone or in combination of two or more.

Examples of the tetravalent aromatic carboxylic acid (aromatic tetracarboxylic acid), alkyl ester of aromatic tetracarboxylic acid, and aromatic tetracarboxylic anhydride include pyromellitic acid 1, 2, 4, 5 and 1, 2,3,5-Pyromellitic acid, 1,2,3,4-Pyromellitic acid, 3-methyl-1,2,4,5-Pyromellitic acid, and 3,6-dimethyl-1, 2,4,5-Pyromellitic acid. One of the preferred compounds is one or more compounds selected from the group consisting of pyromellitic acid, alkyl esters and anhydrides of pyromellitic acid and the like, because they help to provide vinyl chloride The resin has excellent compatibility, and a vinyl chloride resin composition that can be used to form articles having excellent heat resistance and cold resistance is obtained. These aromatic tetracarboxylic acids, alkyl esters of aromatic tetracarboxylic acids, and aromatic tetracarboxylic anhydrides may be used alone or in combination of two or more.

The aforementioned compound a1) can be used alone or in combination of two or more. Preferred compounds in compound a1) are divalent aromatic carboxylic acids (aromatic dicarboxylic acids), alkyl esters of aromatic dicarboxylic acids, and aromatic dicarboxylic acid anhydrides, because they help to provide chlorine The excellent compatibility of the vinyl resin, and a vinyl chloride resin composition that can be used to form articles having excellent heat resistance and cold resistance can be obtained.

The alcohol mixture a2) contains 2-propylheptanol, n-decyl alcohol, and n-dodecyl alcohol.

On the basis that the alcohol mixture a2) is 100 mol%, the content of the 2-propylheptanol is preferably 20 mol% or more, more preferably 30 mol% or more, and still more preferably It is 40 mol% or more, but it is preferably 70 mol% or less, more preferably 60 mol% or less, and still more preferably 50 mol% or less. When it falls within the above range, a more suitable effect can be obtained.

On the basis that the alcohol mixture a2) is 100 mol%, the content of the n-decyl alcohol is preferably 10 mol% or more, but preferably 60 mol% or less, more preferably 40 mol Less than 10% of ears, and more preferably less than 20 mol%. When it falls within the above range, a more suitable effect can be obtained.

On the basis that the alcohol mixture a2) is 100 mol%, the content of n-dodecyl alcohol is preferably 20 mol% or more, more preferably 30 mol% or more, and still more preferably 40 mol% or more, but preferably 70 mol% or less, more preferably 60 mol% or less, and still more preferably 50 mol% or less. When it falls within the above range, a more suitable effect can be obtained.

On the basis that the alcohol mixture a2) is 100 mol%, the total content of 2-propylheptanol, n-decyl alcohol, and n-dodecyl alcohol is preferably 80 mol% or more, more preferably It is 90 mol% or more, more preferably 95 mol% or more, particularly preferably 98 mol% or more, and most preferably 100 mol%. When it falls within the above range, a more suitable effect can be obtained.

The average carbon number of the alcohol mixture a2) is preferably 10.4 or more, more preferably 10.6 or more, and still more preferably 10.8 or more, but it is preferably 11.4 or less, more preferably 11.2 or less And preferably 11.0 or less. When it falls within the above range, a more suitable effect can be obtained.

The average carbon number of the alcohol mixture a2) used here is based on moles.

The average linearity of the alcohol mixture a2) is preferably 50% or more, more preferably 55% or more, and still more preferably 60% or more, but preferably 95% or less, more preferably 90 % Or less, and more preferably 85% or less, particularly preferably 80% or less, optimally 75% or less, even optimally 70% or less, further optimally 65% or less. When it falls within the above range, a more suitable effect can be obtained.

The average linearity of the alcohol mixture a2) as used herein is based on the number of moles.

a1) at least one compound selected from the group consisting of 2 to 4 valent aromatic carboxylic acids, alkyl esters and anhydrides thereof, and a2) containing 2-propylheptanol, n-decyl alcohol and n-dodecane The reaction of the alcohol mixture of alkanol can be carried out by any method.

Specifically, the ester compound A1) can be subjected to the esterification reaction 2 to 2 by selectively making the components a1) and a2) in the presence of an esterification catalyst, for example, at a temperature ranging from 100°C to 250°C 25 hours to prepare. The conditions (for example, temperature and time) of the esterification reaction are not particularly limited, and can be appropriately selected.

Examples of the esterification catalyst include titanium-based catalysts such as tetraisopropyl titanate and tetrabutyl titanate; tin-based catalysts such as dibutyltin oxide; and organic sulfonic acid catalysts such as p-toluenesulfonic acid.

The content of the esterification catalyst used can be appropriately selected, and usually falls within the range of 0.001 to 0.1 parts per 100 parts by mass of the total amount of raw materials.

In order to provide excellent compatibility with vinyl chloride resin and to obtain a vinyl chloride resin composition capable of forming an object having excellent heat resistance and cold resistance, the content of component a2) used is relatively higher than that of component a1) It is preferably from 1.00 to 1.30 moles per mol of carboxyl groups in this component a1), more preferably from 1.03 to 1.10 moles. More specifically, in the case where the component a1) is at least one compound selected from the group consisting of aromatic dicarboxylic acids, alkyl esters thereof and acid anhydrides, relative to component a1) The use amount of the component a2) is preferably 2.00 to 2.60 mol per mole component a1), more preferably 2.06 to 2.20 mol. In the case where the component a1) is at least one compound selected from the group consisting of aromatic tricarboxylic acids, alkyl esters thereof and acid anhydrides, the component a2) relative to the component a1) The amount used is preferably 3.00 to 3.90 moles per mole component a1), more preferably 3.09 to 3.30 moles. In the case where the component a1) is at least one compound selected from the group consisting of aromatic tetracarboxylic acids, alkyl esters thereof and acid anhydrides, the component a2) is used relative to the component a1) The amount is preferably 4.00 to 5.20 moles per mole component a1), more preferably 4.12 to 4.40 moles.

As described above, the plasticizer for vinyl chloride resin of the present invention includes the ester compound A1). The content of the ester compound A1) is preferably 10% or more of the mass, more preferably 30% or more of the mass of the plasticizer used in the vinyl chloride resin of the present invention at 100%. More preferably, it is more than 50% of the mass, particularly preferably, 70% or more, most preferably, 80% or more, even more preferably, 90% or more, and more preferably, quality. 95% or more, particularly optimally 100% of the quality, to make production easier and achieve the beneficial effects of the invention (provide good compatibility with vinyl chloride resin, and obtain the ability to form with excellent cold resistance and (Vinyl chloride resin composition for heat-resistant articles).

In addition to the ester compound A1), the plasticizer for vinyl chloride resin of the present invention may include an additional compound as a plasticizer for vinyl chloride resin, as long as it does not impair the advantageous effects of the present invention. Examples of these additional compounds include benzoates such as diethylene glycol dibenzoate; for example dibutyl phthalate (DBP), di-2-ethylhexyl phthalate ( DOP), diisononyl phthalate (DINP), diisodecyl phthalate (DIDP), di(undecyl) phthalate (DUP), and di(ten) phthalate Phthalates such as trialkyl) esters (DTDP); for example, terephthalate of bis(2-ethylhexyl) terephthalate (DOTP); for example, bis(2) isophthalate -Ethylhexyl) ester (DOIP) phthalate; for example, di-2-ethylhexyl adipate (DOA), diisononyl adipate (DINA), diisodecane adipate Aliphatic dibasic acid esters of esters (DIDA), di-2-ethylhexyl sebacate (DOS) and diisononyl sebacate (DINS); for example, tri-2-ethylhexyl trimellitate ester (TOTM), triisononyl trimellitate (TINTM) and triisodecyl trimellitate (TIDTM) trimellitate; for example, tetra-2-ethylhexyl pyromate (TOPM) Pyromate esters; for example, tri-2-ethylhexyl phosphate (TOP) and tricresyl phosphate (TCP) phosphates; for example, alkyl esters of polyhydric alcohols such as pentaerythritol; having a molecular weight of 800 to 4000 For example, polyester synthesized by polyesterification of dibasic acid of adipic acid and ethylene glycol; for example, epoxidized esters of epoxidized soybean oil and epoxidized linseed oil; for example, diisononyl hexahydrophthalate Alicyclic dibasic acid; for example, fatty acid ethylene glycol ester of 1,4-butanediol dicaprate; tributyl acetyl citrate (ATBC); chlorinated paraffin obtained by chlorination of paraffin or ortho-paraffin; Such as chlorinated fatty acid esters of chlorinated stearates; for example, higher fatty acid esters of butyl oleate.

The vinyl chloride resin composition of the present invention includes: X) the plasticizer for vinyl chloride resin of the present invention; and Y) vinyl chloride resin.

Examples of the vinyl chloride resin Y) include homopolymers of vinyl chloride, homopolymers of vinylidene chloride, copolymers substantially derived from vinyl chloride, and copolymers substantially derived from vinylidene chloride. The vinyl chloride resin Y) can be prepared by various known methods. For example, these preparation methods include suspension polymerization in the presence of an oil-soluble polymerization catalyst in an aqueous medium, or emulsification polymerization in the presence of a water-soluble polymerization catalyst. The degree of polymerization of vinyl chloride resin Y) is usually 300 to 5000, preferably 400 to 3500. The degree of polymerization of 700 to 3000 is preferable in order to obtain excellent processability and can be formed with high heat resistance Vinyl chloride resin composition of sexual objects.

The copolymer in the vinyl chloride resin Y) is, for example, the following copolymer: vinyl chloride monomer and, for example, ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 1-undecene, 1-dodecene, 1-tridecene, and 1 -Copolymers of C2-30α olefins of tetradecene; for example, acrylic acid and its esters, methacrylic acid and its esters, maleic acid and its esters, vinyl acetate, vinyl propionate, and alkyl groups Vinyl ether vinyl compounds; for example, polyfunctional monomers of diallyl phthalate, or mixtures thereof; for example, ethylene acrylic acid copolymers of ethylene-ethyl acrylate copolymers; ethylene-methacrylate copolymers Ethylene-vinyl acetate copolymer (EVA); and by grafting vinyl chloride monomer to butyl rubber, cross-linked acrylic rubber, polyurethane, butadiene-styrene-methyl methacrylate copolymer (MBS), butadiene-acrylonitrile-(α-methyl) styrene copolymer (ABS), styrene-butadiene copolymer, polyethylene, polymethyl methacrylate, or mixtures thereof The graft copolymer obtained above.

The content of the plasticizer X) for the vinyl chloride resin in the vinyl chloride resin composition of the present invention is preferably 10 parts by mass or more per 100 parts by mass of vinyl chloride resin Y), more preferably The ground is 40 parts by mass or more, but preferably 100 parts by mass or less, and more preferably 80 parts by mass or less, to provide excellent compatibility with vinyl chloride resin, and can be obtained with excellent heat resistance and Vinyl chloride resin composition for cold-resistant articles.

The vinyl chloride resin composition of the present invention may contain various additives as long as the benefits of the present invention are not compromised. Examples of such additives include flame retardants, stabilizers, stabilizing aids, colorants, processing aids, fillers, antioxidants (anti-aging agents), ultraviolet absorbers, light stabilizers, lubricants, antistatic Agent and crosslinking activator.

The plasticizers and additives other than the ester compound A1) may be used alone or in combination of two or more.

Examples of flame retardants include inorganic compounds such as aluminum hydroxide, antimony trioxide, magnesium hydroxide, and zinc borate; for example, cresyl diphenyl phosphate, ethyl chlorophenate, propyl chlorophenate, and phosphoric acid Phosphorus compounds of propyl dichloropropionate; and halogenated compounds such as chlorinated paraffin. When the vinyl chloride resin composition contains a flame retardant, the content of the flame retardant is usually 0.1 to 20 parts by mass per 100 parts by mass of vinyl chloride resin Y).

Examples of the stabilizer include, for example, lithium stearate, magnesium stearate, magnesium laurate, calcium ricinoleate, calcium stearate, barium laurate, barium ricinoleate, barium stearate, zinc octoate, Metal soap compounds of zinc laurate, zinc ricinoleate, and zinc stearate; for example, dimethyl tin bis-2-ethylhexyl mercaptoacetate, dibutyl tin maleate, dibutyl tin bisbutyl maleate Organotin compounds of oxalate and dibutyltin dilaurate; and antimony thiol compounds. When the vinyl chloride resin composition contains a stabilizer, the content of the stabilizer is usually 0.1 to 20 parts by mass per 100 parts by mass of vinyl chloride resin Y).

Examples of the stabilizing aid include phosphite compounds such as triphenyl phosphite, monooctyl diphenyl phosphite, and tridecyl phosphate; for example, β-diacetyl acetone and benzoyl acetone Ketone compounds; polyhydric alcohol compounds such as glycerin, sorbitol, pentaerythritol, and polyethylene glycol; perchlorate compounds such as barium perchlorate and sodium perchlorate; hydrotalcite compounds; and zeolites. When the vinyl chloride resin composition contains a stabilizing aid, the content of the stabilizing aid is usually 0.1 to 20 parts by mass per 100 parts by mass of vinyl chloride resin Y).

Examples of the colorant include carbon black, lead sulfide, white carbon, titanium white, zinc barium white, iron oxide red, antimony sulfide, chrome yellow, chrome green, cobalt blue, and molybdenum orange. When a colorant is contained in the vinyl chloride resin composition, the content of the colorant is usually 1 to 100 parts by mass per 100 parts by mass of vinyl chloride resin Y).

Examples of the processing aid include liquid paraffin, polyethylene wax, stearic acid, amide stearate, acetamide bis-stearate, butyl stearate, and calcium stearate. When the processing aid is contained in the vinyl chloride resin composition, the content of the processing aid is usually 0.1 to 20 parts by mass per 100 parts by mass of vinyl chloride resin Y).

Examples of such fillers include, for example, calcium carbonate, silica, alumina, clay, talc, diatomaceous earth, and red aluminum iron metal oxides; fibers and powders of glass, carbon, metal, or other materials; glass Beads, graphite, aluminum hydroxide, barium sulfate, magnesium oxide, magnesium carbonate, magnesium silicate and calcium silicate. When the vinyl chloride resin composition contains a filler, the content of the filler is usually 1 to 100 parts by mass per 100 parts by mass of vinyl chloride resin Y).

Examples of the antioxidant include, for example, 2,6-di-tertiary butylphenol, sulfonic acid [methylene-3-(3,5-tertiary butyl-4-hydroxyphenol)-propionate] methane, Phenolic compounds with 2-hydroxy-4-methoxydiphenyl ketone; for example, alkylated disulfide, thiodipropionate, sulfur compounds with benzothiazole; for example, sennonyl phenyl phosphite, Phosphate compounds of diphenyl isodecyl phosphite, triphenyl phosphite, and ginseng (2,4-di-tertiary butylphenyl) phosphite; and, for example, zinc dialkyl dithiophosphate and The organometallic compound of zinc diaryl dithiophosphate. When the vinyl chloride resin composition contains When an antioxidant is present, the content of the antioxidant is usually 0.2 to 20 parts by mass per 100 parts by mass of vinyl chloride resin Y).

Examples of the ultraviolet absorber include salicylate compounds such as phenyl salicylate and p-tert-butylphenyl salicylate; for example, 2-hydroxy-4-n-octyloxy diphenyl ketone and 2 -Hydroxy-4-n-methoxydiphenyl ketone diphenyl ketone compounds; for example, benzo of 5-methyl-1H-benzotriazole and 1-dioctylaminomethylbenzotriazole Triazole compounds; and cyanoacrylate compounds. When an ultraviolet absorber is contained in the vinyl chloride resin composition, the content of the ultraviolet absorber is usually 0.1 to 10 parts by mass per 100 parts by mass of vinyl chloride resin Y).

-2,4-二基){(2,2,6,6)-四甲基-4-哌啶基)亞胺基}六亞甲基{(2,2,6,6-四甲基-4-哌啶基)亞胺基}}、二丁胺-1,3,5- 三

-N,N’-雙(2,2,6,6-四甲基-4-哌啶基-1,6-六亞甲基二胺與N-(2,2,6,6-四甲基-4-哌啶基)丁胺的縮聚物、以及N,N’,N",N'''-肆-(4,6-雙-(丁基-(N-甲基-2,2,6,6-四甲基哌啶-4-基)胺基)-三

-2-基)-4,7-二氧雜癸烷-1,10-二胺。當氯乙烯樹脂組成物中含有光穩定劑時，該光穩定劑的含量通常係在每100質量份之氯乙烯樹脂Y)下，為0.1至10質量份。 Examples of the light stabilizer include hindered amine light stabilizers, and specific examples thereof include bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis(1,2 ,2,6,6-pentamethyl-4-piperidinyl) sebacate, and 1,2,2,6,6-pentamethyl-4-piperidinyl sebacate (mixture) , Bis(1,2,2,6,6-pentamethyl-4-piperidinyl)[[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]methyl ] Butyl malonate, bis-(1-octyloxy-2,2,6,6-tetramethyl-4-piperidinyl) sebacate, 1,1-dimethylethyl hydrogen The reaction product of peroxide and octane, 4-benzyloxy-2,2,6,6-tetramethylpiperidine, 2,2,6,6-tetramethyl-4-piperidinol and A mixture of esters of high fatty acids, bis(2,2,6,6-tetramethyl-4-piperidinyl)-1,2,3,4-butane tetracarboxylate, bis(1,2, 2,6,6-pentamethyl-4-piperidinyl)-1,2,3,4-butane tetracarboxylate, dimethyl succinate and 4-hydroxy-2,2,6,6 -Polycondensate of tetramethyl-1-piperidine ethanol, poly{(6-(1,1,3,3-tetramethylbutyl)amino-1,3,5-tri

-2,4-diyl){(2,2,6,6)-tetramethyl-4-piperidinyl)imino}hexamethylene{(2,2,6,6-tetramethyl -4-piperidinyl)imino)}, dibutylamine-1,3,5-tri

-N,N'-bis(2,2,6,6-tetramethyl-4-piperidinyl-1,6-hexamethylenediamine and N-(2,2,6,6-tetramethyl Polycondensate of phenyl-4-piperidinyl)butylamine, and N,N',N",N'''-an-(4,6-bis-(butyl-(N-methyl-2,2 ,6,6-tetramethylpiperidin-4-yl)amino)-tri

-2-yl)-4,7-dioxadecane-1,10-diamine. When the vinyl chloride resin composition contains a light stabilizer, the content of the light stabilizer is usually 0.1 to 10 parts by mass per 100 parts by mass of vinyl chloride resin Y).

Examples of the lubricant include polysilicone, liquid paraffin, paraffin, fatty acid metal salts such as metal stearate and metal laurate, fatty acid amide, fatty acid wax, and high fatty acid wax. When a lubricant is contained in the vinyl chloride resin composition, the content of the lubricant is usually 0.1 to 10 parts by mass per 100 parts by mass of vinyl chloride resin Y).

Examples of the antistatic agent include alkyl sulfonate type, alkyl ether carboxylic acid type, and dialkyl sulfosuccinate type anionic antistatic agents; for example, polyethylene glycol derivatives, sorbitan Derivatives, non-ionic antistatic agents with diethanolamine derivatives; for example, alkylamidoamine type, alkyldimethylbenzyl type, and other quaternary ammonium salts, alkylpyridinium type organic acid salts Or cationic antistatic agent of hydrochloric acid; and alkyl betaine type, alkyl imidazoline type, and other amphoteric antistatic agents. When an antistatic agent is contained in the vinyl chloride resin composition, the content of the antistatic agent is generally 0.1 to 10 parts by mass per 100 parts by mass of vinyl chloride resin Y).

Examples of the crosslinking activator include, for example, tetraethylene glycol dimethacrylate, divinylbenzene, diallyl phthalate, triallyl isocyanate, trimethylolpropane triacrylate Ester, tetramethylol The multifunctional monomer of methane tetramethacrylate and trimethoxyethoxyethylene silane can be used in a range of 0.5 to 30 parts by mass per 100 parts by mass of vinyl chloride resin Y). In particular, the content of 3 to 20 parts by weight is most effective.

The vinyl chloride resin composition of the present invention can be used, for example, by applying a plasticizer X) of a vinyl chloride resin including monoester compound A1), a vinyl chloride resin Y), and optionally various additives, such as plaster A mixer, Henschel mixer, Banbury mixer, or belt blender is stirred and mixed to prepare a mixed powder. Alternatively, the vinyl chloride resin composition can be obtained by combining a plasticizer X) of a vinyl chloride resin including a monoester compound A1) with a vinyl chloride resin Y), and optionally various additives, such as a cone Kneading machine of double-screw extruder, parallel twin-screw extruder, single-screw extruder, co-kneading type kneader, or roll kneader, and melt forming into pellet form to prepare. Alternatively, the vinyl chloride resin composition can be formed by combining a plasticizer X) of a vinyl chloride resin including an ester compound A1) with a vinyl chloride resin Y) and optionally various additives, for example Kneading machines such as mixers, butterfly mixers, planetary mixers, belt blenders, kneaders, dissolvers, biaxial mixers, high-speed mixers, or three-roll mills for mixing Knead with it to prepare a paste, especially a paste.

In the case where the vinyl chloride resin composition of the present invention is in the form of blended powder or granules, it can be formed by, for example, vacuum forming, compression molding, extrusion molding, injection molding, calendering, press molding, blowing Molding, or powder molding, is a method known in the art, and is melted to form an object having a desired shape.

In addition, in the case where the vinyl chloride resin composition of the present invention is in the form of a paste, it may be known in the technical field such as spreading, dipping, gravure processing, hollow casting, or meshing Method to form an object with a desired shape.

The shape of the formed object is not particularly limited, and may be, for example, rod-shaped, sheet, film, sheet, cylindrical, circular, or elliptical, or a special shape (such as a star or polygon) , For use in toys, decorations, or other applications.

The article formed as described above is used for pipe fittings such as water pipes, joints for pipe fittings, drainage ditches such as rain gutters, window frame slides, panels, wave boards, underbody coatings, instrument panels, instrument panels, Consoles, door panels, under-carpet products, tube seats, door trims, vehicle interior leather, and other vehicle interior materials, various leather products, decorative sheets, agricultural films, food packaging films, conductive wire coatings, various foam products , Hose, medical pipe fittings, food pipe fittings, refrigerator gaskets, packaging, wallpaper, floor materials, boots, curtains, soles, gloves, waterstops, toys, panels, blood bags, infusion bags, canvas, mats, watertight Board, civil engineering board, roofing material, waterproof board, insulation board, industrial tape, glass film, eraser and other applications.

The vinyl chloride resin composition of the present invention is preferably used for producing coatings for conductive wires and other objects. In addition, the electric wire produced by coating the conductive wire with the vinyl chloride resin composition of the present invention is preferably a harness produced by coating the conductive wire with the vinyl chloride resin composition of the present invention .

The vinyl chloride resin composition of the present invention can also be preferably used for the production of automotive interior materials and other articles. The automotive interior material is preferably a vehicle interior leather formed from the vinyl chloride resin composition of the present invention.

Examples

The invention will be described in more detail below with reference to examples. In these embodiments, unless otherwise stated, "parts" and "%" are calculated based on quality. In addition, the acid value, hydroxyl value and viscosity are measured by the following method.

<Measurement method of acid value>

The acid value is measured in accordance with JIS K0070-1992.

<Measurement method of hydroxyl value>

The hydroxyl value is measured according to JIS K0070-1992.

<Measurement method of viscosity>

The viscosity is measured according to JIS K6901-1986.

Example 1 (plasticizer of vinyl chloride resin)

In a reaction vessel, 148 g (1.0 mol) of phthalic anhydride, 76 g (0.48 mol) of 2-propylheptanol (manufactured by BASF), 179 g (1.13 mol) of n- Decanol (manufactured by Kao Corporation; KALCOL 1098, linearity: 100 mol%), 90 g (0.48 mol) of n-dodecyl alcohol (manufactured by New Japan Chemical Co., Ltd.; CONOL 20P, linearity: 100 mol Ear %), and 0.20 g of tetraisopropyl titanate as an esterification catalyst were placed in a four-necked flask equipped with a thermometer, stirrer and reflux condenser with an internal volume of 1 liter. The mixture was gradually heated to 230 °C, and stirred under a nitrogen flow, and at 230 °C Continue to heat, while continuing to remove the generated water until the acid value reaches 2 or less. After the reaction, unreacted 2-propylheptanol, n-decyl alcohol, and n-dodecyl alcohol were evaporated at 230 to 200°C under reduced pressure to obtain 436 g of plasticizer A (acid value: 0.02 , Hydroxyl value: 0.03, viscosity at 25℃: 54mPa‧s).

The amounts of 2-propylheptanol, n-decyl alcohol, and n-dodecyl alcohol are contained in 100 mol% alcohol mixture a2), which are 23 mol%, 54 mol%, and 23 mol%, respectively. In addition, the alcohol mixture a2) has an average carbon number of 10.5 and an average linearity of 77%.

Example 2 (same as above)

In a reaction vessel, 148 g (1.0 mol) of phthalic anhydride, 100 g (0.63 mol) of 2-propylheptanol (manufactured by BASF), 116 g (0.74 mol) of n- Decanol (manufactured by Kao Corporation; KALCOL 1098, linearity: 100 mol %), 137 g (0.74 mol) of n-dodecyl alcohol (manufactured by New Japan Chemical Co., Ltd.; CONOL 20P, linearity: 100 mol Ear %), and 0.20 g of tetraisopropyl titanate as an esterification catalyst were placed in a four-necked flask equipped with a thermometer, stirrer and reflux condenser with an internal volume of 1 liter. The mixture was gradually heated to 230°C, and stirred under a nitrogen flow, and continued to be heated at 230°C, while continuously removing the generated water until the acid value reached 2 or less. After the reaction, unreacted 2-propylheptanol, n-decyl alcohol, and n-dodecyl alcohol were evaporated at 230 to 200°C under reduced pressure to obtain 440 g of plasticizer B (acid value: 0.03 , Hydroxyl value: 0.04, viscosity at 25℃: 58mPa‧s).

The content of 2-propylheptanol, n-decyl alcohol, and n-dodecyl alcohol under the alcohol mixture a2) of 100 mol% is 30 mol%, 35 mol%, and 35 mol%, respectively. In addition, the alcohol mixture a2) has an average carbon number of 10.7 and an average linearity of 70%.

Example 3 (same as above)

In a reaction vessel, 148 g (1.0 mol) of phthalic anhydride, 133 g (0.84 mol) of 2-propylheptanol (manufactured by BASF), 46 g (0.29 mol) of n- Decanol (manufactured by Kao Corporation; KALCOL 1098, linearity: 100 mol%), 180 g (0.97 mol) of n-dodecyl alcohol (manufactured by New Japan Chemical Co., Ltd.; CONOL 20P, linearity: 100 mol Ear %), and 0.20 g of tetraisopropyl titanate as an esterification catalyst were placed in a four-necked flask equipped with a thermometer, stirrer and reflux condenser with an internal volume of 1 liter. The mixture was gradually heated to 230°C, and stirred under a nitrogen flow, and continued to be heated at 230°C, while continuously removing the generated water until the acid value reached 2 or less. After the reaction, unreacted 2-propylheptanol, n-decyl alcohol, and n-dodecyl alcohol were evaporated at 230 to 200°C under reduced pressure to obtain 448 g of plasticizer C (acid value: 0.01 , Hydroxyl value: 0.04, viscosity at 25℃: 58mPa‧s).

The content of 2-propylheptanol, n-decyl alcohol, and n-dodecyl alcohol is 100 mol% alcohol mixture a2), which is 40 mol%, 14 mol%, 46 mol%, respectively. In addition, the alcohol mixture a2) has an average carbon number of 10.9 and an average linearity of 60%.

Example 4 (same as above)

In a reaction vessel, 194 g (1.0 mol) of dimethyl isophthalate, 76 g (0.48 mol) of 2-propylheptanol (manufactured by BASF), 179 g (1.13 mol) of n Decanol (manufactured by Kao Corporation; KALCOL 1098, linearity: 100 mol%), 90 g (0.48 mol) n-dodecyl alcohol (manufactured by New Japan Chemical Co., Ltd.; CONOL 20P, linearity: 100 mol Ear %), and 0.20 g of tetraisopropyl titanate as an esterification catalyst were placed in a four-necked flask equipped with a thermometer, stirrer and reflux condenser with an internal volume of 1 liter. The mixture was gradually heated to 230°C, and stirred under a nitrogen flow, and continued to be heated at 230°C for a period of time while continuously removing the generated methanol. After the reaction, unreacted 2-propylheptanol, n-decyl alcohol, and n-dodecyl alcohol were evaporated at 230 to 200°C under reduced pressure to obtain 425 g of plasticizer D (acid value: 0.05 , Hydroxyl value: 0.08, viscosity at 25℃: 63mPa‧s).

The amounts of 2-propylheptanol, n-decyl alcohol, and n-dodecyl alcohol are contained in 100 mol% alcohol mixture a2), which are 23 mol%, 54 mol%, and 23 mol%, respectively. In addition, the alcohol mixture a2) has an average carbon number of 10.5 and an average linearity of 77%.

Comparative Example 1 [Synthesis of ester compound A') for comparison]

In a reaction vessel, 148 g (1.0 mol) of phthalic anhydride, 333 g (2.10 mol) of 2-propylheptanol (manufactured by BASF), and 0.20 g of titanic acid as an esterification catalyst Tetraisopropyl ester was placed in a four-neck flask with an internal volume of 1 liter equipped with a thermometer, stirrer and reflux condenser. The mixture was gradually heated to 230°C, Stir under a nitrogen stream and continue to heat at 230°C while continuously removing the water produced until the acid value reaches 2 or less. After the reaction, unreacted 2-propylheptanol was evaporated at 230 to 200°C under reduced pressure to obtain 424 g of plasticizer E (acid value: 0.04, hydroxyl value: 0.05, at 25°C The viscosity is: 102mPa‧s).

Comparative Example 2 (same as above)

In a reaction vessel, 148 g (1.0 mol) of phthalic anhydride, 179 g (1.13 mol) of 2-propylheptanol (manufactured by BASF), 181 g (0.97 mol) of n-ten Glycol (manufactured by New Japan Chemical Co., Ltd.; CONOL 20P, linearity: 100 mol%), and 0.20 g of tetraisopropyl titanate as an esterification catalyst were placed in a thermometer equipped with a stirrer A four-necked flask with an internal volume of the reflux condenser of 1 liter. The mixture was gradually heated to 230°C, and stirred under a nitrogen flow, and continued to be heated at 230°C while continuously removing the generated water until the acid value reached 2 or less. After the reaction, unreacted 2-propylheptanol and n-dodecyl alcohol were evaporated at 230 to 200°C under reduced pressure to obtain 427 g of plasticizer F (acid value: 0.02, hydroxyl value: 0.03 , The viscosity at 25 ℃: 68mPa‧s).

Comparative Example 3 (same as above)

In a reaction vessel, 148 g (1.0 mol) of phthalic anhydride, 447 g (2.4 mol) of n-dodecyl alcohol (manufactured by New Japan Chemical Co., Ltd.; CONOL 20P, linearity: 100 Molar %), and 0.20 g of tetraisopropyl titanate as an esterification catalyst, were placed in a four-necked flask with an internal volume of 1 liter equipped with a thermometer, stirrer and reflux condenser. The mixture was gradually heated to 230°C, Stir under a nitrogen stream and continue heating at 230°C while continuously removing the water produced until the acid value reaches 2 or less. After the reaction, unreacted dodecanol was evaporated at 230 to 200°C under reduced pressure to obtain 456 g of plasticizer G (acid value: 0.06, hydroxyl value: 0.08, and the viscosity at 25°C was : 58mPa‧s).

Example 5 (Vinyl chloride resin composition)

50 parts of plasticizer of vinyl chloride resin (plasticizer A prepared in Example 1), 100 parts of vinyl chloride resin [ZEST 1000Z manufactured by Shin Dai-Ichi Vinyl Corporation, degree of polymerization: 1,000], And 4 parts of filler (calcium/zinc composite stabilizer (product name: GLECK MP-677D) manufactured by NISSIN TRADING Co., Ltd.) were mixed to prepare the vinyl chloride resin composition 1 of the present invention. The vinyl chloride resin composition 1) was used to form an object, and the like were then used to evaluate the plasticizing effect, heat resistance, and cold resistance of the plasticizer of the vinyl chloride resin on the vinyl chloride resin. In addition, they have also been used to evaluate the compatibility between the plasticizer of the vinyl chloride resin and the vinyl chloride resin. The methods used to prepare the objects used in the evaluation operation, and the methods used to evaluate them are as follows. The evaluation results are also presented in Table 1.

●Evaluate the plasticizing effect of this vinyl chloride resin plasticizer on vinyl chloride resin <Conditions for forming objects>

The vinyl chloride resin composition 1) is kneaded for 10 minutes in a twin-roll mill heated to 170°C, and the kneaded vinyl chloride resin composition 1) can be heated to 170℃ press In this, a mold having a 0.5 mm thick object (0.5 mm thick mold) is formed to form a sheet having a thickness of 0.5 mm.

<Evaluation method>

The plasticizing effect is evaluated according to JIS K6251 by measuring 100% modulus (tensile stress at 100% elongation) and tensile elongation. Specifically, this 0.5 mm thick sheet system was subjected to a tensile test under the following conditions to measure 100% modulus and tensile elongation. The tensile elongation (percentage) is the distance between the chucks by tensile fracture with a 0.5mm thick sheet, minus the initial distance between the chucks (20mm), and then the difference It is determined by dividing the distance between the chucks (20 mm).

Measuring device: "TENSILON Universal Material Testing Instrument" manufactured by ORIENTEC CORPORATION

Sample shape: No. 3 dumbbell

Distance between chucks: 20 mm

Stretching speed: 200 mm/min

Measurement environment: temperature 23℃, humidity 50%

The lower 100% modulus corresponds to the higher effect of plasticizing the vinyl chloride resin. In addition, a higher tensile elongation corresponds to a higher effect of plasticizing the vinyl chloride resin.

●Evaluation of heat resistance of articles formed from vinyl chloride resin composition <Conditions for forming objects>

The vinyl chloride resin composition 1) is kneaded for 10 minutes in a twin-roll mill heated to 170°C, and the kneaded vinyl chloride resin composition 1) can be heated to 170℃ press In this, a mold having a 0.5 mm thick object (0.5 mm thick mold) is formed to form a sheet having a thickness of 0.5 mm. Dumbbell No. 3 (dumbbell sample) was prepared from this 0.5 mm thick sheet in accordance with JIS K6251.

<Evaluation method>

The heat aging test was conducted in accordance with JIS K6257. The test conditions include 168 hours at 120°C. Before and after the heat aging test, the mass of each dumbbell-shaped sample was measured to calculate the mass difference (reduction) before and after the heat aging test (percentage based on the mass before the heat aging test). The smaller value represents the plasticizer of the vinyl chloride resin, and after the heat aging test, there is a greater tendency to remain in the object, so the heat resistance effect of the plasticizer of the vinyl chloride resin can be expected.

In addition, the tensile test was performed before and after the heat aging test based on the conditions of JIS K6251 to measure the elongation of the dumbbell sample before and after the heat aging test. Then, the elongation rate (elongation maintenance rate) of the dumbbell sample after the heat aging test was calculated, relative to the elongation rate (=100%) before the heat aging test. The larger elongation maintenance rate means that there is a greater tendency to maintain the plasticizing effect even after the heat aging test, and the vinyl chloride resin composition system is considered to have higher heat resistance.

●Evaluation of cold resistance of articles formed from vinyl chloride resin composition <Conditions for forming objects>

The vinyl chloride resin composition 1) was kneaded for 10 minutes in a twin-roll mill heated to 170°C, and the kneaded The vinyl chloride resin composition 1) is formed into a sheet having a thickness of 1.0 mm using a mold capable of forming an object having a thickness of 1.0 mm (a mold having a thickness of 1.0 mm) in a press heated to 170°C. . Samples were prepared from 1.0 mm thick sheets in accordance with JIS K6745.

<Evaluation method>

The cold resistance was evaluated using a Clash-Berg torsional flexibility testing machine in accordance with JIS K6745. Lower temperature means higher cold resistance.

●Compatibility evaluation <Conditions for forming objects>

The vinyl chloride resin composition 1) is kneaded for 10 minutes in a twin-roll mill heated to 170°C, and the kneaded vinyl chloride resin composition 1) can be heated to In a 170°C press, a mold having an object with a thickness of 1.0 mm (a mold with a thickness of 1.0 mm) is formed to form a sheet having a thickness of 1.0 mm. Two sheets with a size of 5 cm×5 cm and a thickness of 1.0 mm were cut from the sheet.

<Evaluation method>

The two sheet systems overlap each other and are placed at 70°C and 95% r.h. for 30 days. After that, the outer surfaces of the sheets and the overlapping surfaces of the sheets were evaluated based on the following criteria.

Good: When the outer surface of the sheets and the overlapping surface of the sheets were observed with the naked eye, no powder, sticky, or other foreign matter (bleed-out) was found, and even if the outer surfaces of the sheets were touched with fingers When the surface overlapped with the sheets, there was no bleeding.

Poor: When the outer surface of the sheets and the overlapping surface of the sheets are observed with the naked eye, and when the outer surface of the sheets and the overlapping surface of the sheets are touched with a finger, a bleed can be found.

Example 6 (same as above)

The vinyl chloride resin composition 2) was prepared in the same manner as in Example 5, except that 50 parts of the plasticizer B prepared in Example 2 was used instead of 50 parts of the plasticizer B prepared in Example 1. Of plasticizer A. The composition was evaluated in the same manner as in Example 5, and the results are shown in Table 1.

Example 7 (same as above)

The vinyl chloride resin composition 3) was prepared in the same manner as in Example 5, except that 50 parts of the plasticizer C prepared in Example 3 was used instead of 50 parts of the plasticizer C prepared in Example 1. Of plasticizer A. The composition was evaluated in the same manner as in Example 5, and the results are shown in Table 1.

Example 8 (same as above)

The vinyl chloride resin composition 4) was prepared in the same manner as in Example 5, except that 50 parts of the plasticizer D prepared in Example 4 was used instead of 50 parts of the plasticizer D prepared in Example 1. Of plasticizer A. The composition was evaluated in the same manner as in Example 5, and the results are shown in Table 1.

Comparative Example 4 (Vinyl chloride resin composition for comparison)

The vinyl chloride resin composition 5) was prepared in the same manner as in Example 5, except that 50 parts of the plasticizer E prepared in Comparative Example 1 was used instead of 50 parts of the plasticizer E prepared in Example 1. Prepared plastic 化剂A。 Chemical agent A. The composition was evaluated in the same manner as in Example 5, and the results are shown in Table 2.

Comparative Example 5 (same as above)

The vinyl chloride resin composition 6) was prepared in the same manner as in Example 5, except that it used 50 parts of the plasticizer F prepared in Comparative Example 2 instead of 50 parts of the plasticizer F prepared in Example 1. Prepared plasticizer A. The composition was evaluated in the same manner as in Example 5, and the results are shown in Table 2.

Comparative Example 6 (same as above)

The vinyl chloride resin composition 7) was prepared in the same manner as in Example 5, except that it used 50 parts of the plasticizer G prepared in Comparative Example 3 instead of 50 parts of the plasticizer G prepared in Example 1. Prepared plasticizer A. The composition was evaluated in the same manner as in Example 5, and the results are shown in Table 2.

As can be seen from the results shown in Table 1 and Table 2, the plasticizer for vinyl chloride resin according to the present invention has excellent compatibility with vinyl chloride resin and is used to provide a vinyl chloride resin composition , Which can form objects with excellent heat resistance and cold resistance. Therefore, the plasticizer for vinyl chloride resin of the present invention has been proven to have good compatibility with vinyl chloride resin, and can be used to provide chlorine that can maintain plasticity even when exposed to high or low temperature environments Vinyl resin composition. In addition, the plasticizer for vinyl chloride resin of the present invention, which can be made from cheap and easily available alcohols, further solves the problem of raw material cost.

Claims (12)

A plasticizer for vinyl chloride resin, which contains A1) ester compound, which is selected from a1) at least one selected from divalent to tetravalent aromatic carboxylic acid, and its alkyl ester and anhydride A group of compounds; formed by the reaction of a2) an alcohol mixture containing 2-propylheptanol, n-decyl alcohol, and n-dodecyl alcohol. The plasticizer of vinyl chloride resin as claimed in claim 1, wherein the compound a1) is selected from alkyl esters of phthalic acid, isophthalic acid, terephthalic acid, and the like and phthalate At least one of the group consisting of acid anhydride. The plasticizer of vinyl chloride resin according to claim 1 or 2, wherein the alcohol mixture a2) contains 20 to 70 mol% of 2-propylheptanol on the basis that the mixture is 100 mol%, 10 to 60 mol% of n-decyl alcohol, and 20 to 70 mol% of n-dodecyl alcohol. The plasticizer of vinyl chloride resin according to claim 1 or 2, wherein the alcohol mixture a2) contains 20 to 50 mol% of 2-propylheptanol on the basis that the mixture is 100 mol%, 10 to 60 mol% of n-decyl alcohol, and 20 to 50 mol% of n-dodecyl alcohol. The plasticizer of vinyl chloride resin according to any one of claims 1 to 4, wherein the alcohol mixture a2) has an average number of carbon atoms of 10.4 to 11.4. The plasticizer of vinyl chloride resin according to any one of claims 1 to 4, wherein the alcohol mixture a2) has an average number of carbon atoms of 10.4 to 11.0. The plasticizer of vinyl chloride resin according to any one of claims 1 to 6, wherein the alcohol mixture a2) has an average linearity of 50 to 95%. The plasticizer of vinyl chloride resin according to any one of claims 1 to 6, wherein the alcohol mixture a2) has an average linearity of 60 to 85%. A vinyl chloride resin composition comprising X) a plasticizer of the vinyl chloride resin according to any one of claims 1 to 8; and Y) a vinyl chloride resin. The vinyl chloride resin composition according to claim 9, wherein the plasticizer X) of the vinyl chloride resin is present in an amount of 10 to 100 parts by mass per 100 parts by mass of vinyl chloride resin Y). An electric wire comprising a wire covered with the vinyl chloride resin composition of claim 9 or 10. A vehicle interior material formed from the vinyl chloride resin composition of claim 9 or 10.