KR102361955B1 - The method for preparing plasticizer for polyvinyl chloride straight resin - Google Patents

Abstract

The present invention relates to a method for producing a plasticizer for polyvinyl chloride straight resin. Specifically, it relates to a method for producing a plasticizer for polyvinyl chloride straight resin containing an epoxidized fatty acid alkyl ester structure.

Description

The manufacturing method of the plasticizer for polyvinyl chloride straight resin {THE METHOD FOR PREPARING PLASTICIZER FOR POLYVINYL CHLORIDE STRAIGHT RESIN}

The present invention relates to a method for producing a plasticizer for polyvinyl chloride straight resin. Specifically, it relates to a novel method for preparing an epoxidized fatty acid cyclohexyl ester plasticizer.

Polyvinyl chloride (PVC) resin is widely used in various fields because it has excellent price competitiveness and easy hardness control, and can be used in various molding processes. These polyvinyl chloride resins cannot be used alone. In order to realize desired physical properties, various additives such as plasticizers, colorants, and heat stabilizers are mixed during processing, and then molded through extrusion, calendering, injection, etc. and commercialized. In particular, the plasticizer is one of the important additives essential when processing polyvinyl chloride because it serves to impart flexibility to the polyvinyl chloride resin and improve processability.

A typical plasticizer used in a conventional polyvinyl chloride resin is a phthalate-based plasticizer. However, phthalate-based plasticizers are difficult to satisfy environmental regulations, and when they are mixed with polyvinyl chloride resin and manufactured into molded products, there is a problem that the plasticizer migrates to the surface, and it does not satisfy the requirements such as high heat resistance and high mechanical properties.

As a plasticizer that can replace the phthalate plasticizer, an epoxidized fatty acid alkyl ester-based plasticizer (eg, an epoxidized fatty acid cyclohexyl ester-based plasticizer) may be exemplified. The plasticizer has good compatibility with the polyvinyl chloride resin and good plasticization efficiency, so it is a good candidate material to replace the phthalate-based plasticizer.

Conventional epoxidized fatty acid cyclohexyl ester plasticizers are manufactured by esterifying an unsaturated fatty acid with cyclohexanol as a manufacturing method, and then epoxidizing an unsaturated group in the structure.

However, in the above-described manufacturing method, when epoxidizing an unsaturated group using an acid catalyst, the epoxidation efficiency is lowered and the ester group in the structure by the acid catalyst is acidified, so the efficiency as a plasticizer occurs. There is a problem with this falling. In addition, there is a problem in that the plasticizer is polymerized to a high molecular weight by the chain reaction of opening the epoxy ring.

Therefore, it is necessary to research and develop a new manufacturing method that can solve problems that may occur when manufacturing the epoxidized fatty acid cyclohexyl ester plasticizer.

Republic of Korea Patent Publication No. 10-2017-0018665 (2017.02.20)

One object of the present invention is to solve the problem of low efficiency when epoxidizing using an acid catalyst, which is a problem with the conventional manufacturing method of an epoxidized fatty acid cyclohexyl ester plasticizer, which is a conventional plasticizer for polyvinyl chloride straight resin, and a structure by an acid catalyst Preparation of a new epoxidized fatty acid cyclohexyl ester plasticizer that can solve the problem that the ester group in the inner group is acidified, and that the plasticizer is polymerized to a high molecular weight by the chain reaction of opening the epoxy ring The purpose is to provide a method.

In addition, an object of the present invention is to use the epoxidized fatty acid cyclohexyl ester plasticizer prepared by the new manufacturing method according to the present invention, and it is possible to unexpectedly increase heat resistance, high plasticization efficiency and mechanical strength, and in particular, An object of the present invention is to provide a polyvinyl chloride resin composition and a molded article having excellent aging properties due to a low loss in volatilization.

One aspect of the present invention is to provide a method for producing a plasticizer for a polyvinyl chloride straight resin prepared by transesterification of an epoxidized fatty acid alkyl ester represented by the following Chemical Formula 1 with cyclohexanol.

[Formula 1]

(The above R ₁ is hydrogen or a C1 to C20 alkyl group, R ₂ is a C1 to C20 alkylene group, and R ₃ is a C1 to C20 alkyl group or a C3 to C20 cycloalkyl group.)

In one embodiment, R ₁ of the epoxidized fatty acid alkyl ester represented by Formula 1 is It may be a C1 to C20 branched or linear alkyl group.

In one embodiment, the molar ratio of the epoxidized fatty acid alkyl ester to cyclohexanol may be 0.5 mol: 1 to 1 mol: 2.5 mol.

In one aspect, the transesterification reaction may be carried out under a basic catalyst.

In one aspect, the method for manufacturing the plasticizer for polyvinyl chloride straight resin may further include a purification process.

Another aspect of the present invention is to provide a polyvinyl chloride composition comprising the epoxidized fatty acid cyclohexyl ester plasticizer of the present invention and a polyvinyl chloride resin.

In another embodiment, the composition may further include one or more additives selected from the group consisting of a stabilizer, a foaming agent, a filler, and titanium dioxide.

Another aspect of the present invention is to provide a molded article prepared from the polyvinyl chloride composition of the present invention.

In another embodiment, the molded article may have a loss of volatilization of 7 wt% or less.

Since the epoxidized fatty acid cyclohexyl ester plasticizer prepared by the manufacturing method according to the present invention is a non-phthalate plasticizer, it is environmentally friendly and has excellent compatibility with polyvinyl chloride straight resin.

In addition, when preparing an epoxidized fatty acid cyclohexyl ester plasticizer from the manufacturing method according to the present invention, there is no risk of epoxidation efficiency falling or the ester group in the structure being acidified, which is a problem of the conventional manufacturing method, and also There is an advantage that the plasticizer is less likely to be polymerized to a high molecular weight due to the chain reaction of ring opening.

In addition, when a molded article is manufactured from a polyvinyl chloride straight resin composition containing an epoxidized fatty acid cyclohexyl ester plasticizer prepared by the manufacturing method according to the present invention, heat resistance is high, and tensile strength and elongation are excellent. In addition, the 100% modulus is low, so the plasticization efficiency is excellent, and in particular, the loss of volatilization is also low and the aging properties are excellent.

Hereinafter, the present invention will be described in more detail through embodiments or examples including the accompanying drawings. However, the following examples are only a reference for explaining the present invention in detail, and the present invention is not limited thereto, and may be implemented in various forms.

Also, unless defined otherwise, all technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description herein is for the purpose of effectively describing particular embodiments only, and is not intended to limit the present invention.

In the present invention, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated.

Also, the singular forms used in the specification and appended claims may also be intended to include the plural forms unless the context specifically dictates otherwise.

The present invention relates to a novel manufacturing method of an epoxidized fatty acid cyclohexyl ester plasticizer that can be used with a polyvinyl chloride straight resin.

A conventional epoxidized fatty acid cyclohexyl ester plasticizer was prepared by esterifying an unsaturated fatty acid with cyclohexanol, and then epoxidizing an unsaturated group in the structure. However, such a manufacturing method is carried out under an acid catalyst, and there is a problem that the epoxidation efficiency is lowered when epoxidizing the unsaturated group in the fatty acid, and the ester group in the structure is acidified due to the acid catalyst, thereby reducing the efficiency as a plasticizer. . In addition, there is a problem in that the plasticizer is polymerized to a high molecular weight by the chain reaction of opening the epoxy ring.

Therefore, the present inventors have researched to solve the problems of the conventional manufacturing method as described above, and found a new manufacturing method for preparing a plasticizer by transesterifying an epoxidized fatty acid alkyl ester compound with cyclohexanol as a starting material. The present invention was completed.

Briefly describing the new manufacturing method according to the present invention, a step of transesterifying an epoxidized fatty acid alkyl ester compound with cyclohexanol, and after completion of the reaction, obtaining a pure epoxidized fatty acid cyclohexyl ester plasticizer through a purification process consists of

Hereinafter, each configuration of the present invention will be described in more detail.

One aspect of the present invention is to provide a method for preparing a plasticizer for a polyvinyl chloride straight resin prepared by transesterification of an epoxidized fatty acid alkyl ester represented by the following Chemical Formula 1 with cyclohexanol, and this will be described in more detail. .

[Formula 1]

(The above R ₁ is hydrogen or a C1 to C20 alkyl group, R ₂ is a C1 to C20 alkylene group, and R ₃ is a C1 to C8 alkyl group or a C3 to C20 cycloalkyl group.)

In one embodiment, R ₁ in Formula 1 may be a C1 to C20 branched or linear alkyl group, preferably a C5 to C10 branched or linear alkyl group, wherein R ₂ is a C1 to C20 branched or It may be a linear alkylene group, preferably a C5 to C10 branched or linear alkylene group. R ₃ may be a C1 to C20 alkyl group or a C3 to C20 cycloalkyl group, and specifically may include methyl, ethyl, propyl, butyl, cyclohexyl and 2-ethylhexyl ester. Formula 1 may preferably be an epoxidized fatty acid methyl ester (EFAME) represented by Formula 2 below.

[Formula 2]

When a plasticizer is prepared using the epoxidized fatty acid methyl ester, it has good compatibility with polyvinyl chloride straight resin, high heat resistance when manufactured as a polyvinyl chloride molded article, and unexpectedly excellent tensile strength and elongation. In addition, the 100% modulus is low, so the plasticization efficiency is excellent, and the loss of volatilization is also low, so the aging resistance is more excellent.

In one embodiment, R ₁ of the epoxidized fatty acid alkyl ester of Formula 1 may be hydrogen, and when R ₁ is hydrogen, an epoxy group is located at the end of the prepared epoxidized fatty acid cyclohexyl ester plasticizer, and the R ₁ The epoxy group is positioned in the middle of the plasticizer prepared with a C1 to C20 branched or linear alkyl group. Accordingly, as a result of the research conducted by the present inventors, the plasticizer prepared from the case in which R ₁ is hydrogen has a plasticizing efficiency of about 10% less than that of the plasticizer prepared from the case where R ₁ is a C1 to C20 branched or linear alkyl group. . In addition, the plasticizer prepared from the case where R ₁ is a C1 to C20 branched or linear alkyl group has higher stability than the plasticizer prepared from the case where R ₁ is hydrogen, and the transesterification reaction with other alcohol compounds is efficient It can happen and is preferred. In addition, it has better compatibility with polyvinyl chloride resin, and has high heat resistance and excellent mechanical strength when manufactured as a polyvinyl chloride molded article. In addition, the plasticization efficiency is excellent, and the loss of volatilization is also low, and the aging properties are more excellent, which is preferred. Nevertheless, a plasticizer prepared from the case where R ₁ is hydrogen is also included in the scope of the present invention.

In one aspect, it is characterized in that cyclohexanol is used as the alcohol reacting with the epoxidized fatty acid alkyl ester, and as compared to using a plasticizer prepared by transesterification with other alcohol compounds, surprisingly greatly improved heat resistance and mechanical strength and It is possible to express the effect that the plasticization efficiency and also the amount of volatilization loss is significantly lower.

In one embodiment, the molar ratio of the epoxidized fatty acid alkyl ester to cyclohexanol may be 1 mol: 0.5 to 2.5 mol, preferably 1 mol: 1 to 2 mol. When the plasticizer is prepared by including the range as described above, the transesterification reaction of the epoxidized fatty acid alkyl ester and cyclohexanol proceeds efficiently, and the yield of the epoxidized fatty acid cyclohexyl ester-based plasticizer is high, which is more preferred.

In one aspect, the transesterification reaction is not limited, but may be carried out at a temperature of 80 to 200 ° C., preferably 100 to 160 ° C., and the reaction time is 10 to 30 hours, preferably 15 to 25 hours. have. The transesterification reaction occurs efficiently in the above temperature and time range, and the yield of the epoxidized fatty acid cyclohexyl ester plasticizer is high, which is more preferred.

In one aspect, the transesterification reaction may be carried out under a basic catalyst. Although it does not restrict|limit especially, For example, sodium hydroxide, potassium hydroxide, calcium hydroxide, sodium methoxide etc. are mentioned. Preferably, sodium hydroxide can be used, and when it is used, the efficiency of the transesterification reaction is high, which is more preferred. The basic catalyst may be used in an amount of 10 to 40 parts by weight, preferably 20 to 30 parts by weight, based on 100 parts by weight of the epoxidized fatty acid alkyl ester. When the basic catalyst is used in the above range, the transesterification reaction occurs efficiently, and the yield of the epoxidized fatty acid cyclohexyl ester-based plasticizer is high, which is more preferred.

The process of preparing the epoxidized fatty acid cyclohexyl ester plasticizer includes a process of obtaining a pure compound through a purification process after completing the transesterification reaction. The purification process is to obtain a pure epoxidized fatty acid cyclohexyl ester plasticizer after a process of removing salts in the reactant and a dealcoholization process of removing residual alcohol.

Another aspect of the present invention is to provide a polyvinyl chloride composition comprising the plasticizer and polyvinyl chloride resin prepared from the present invention.

The polyvinyl chloride straight resin may be a homopolymer of vinyl chloride and a hybrid polymer containing 50% or more of vinyl chloride, and a polymerization degree of 700 to 1,200 may be used, but is not limited thereto. In addition, the straight resin is a polyvinyl chloride resin made by suspension polymerization and is more preferred in the present invention.

The polyvinyl chloride resin composition according to another aspect of the present invention can be prepared by a method generally known in the art using the polyvinyl chloride resin, the plasticizer of the present invention and optionally an additive, and the method is particularly limited it doesn't happen Specifically, for example, there are TOW-ROLL MILL, SCREW MIXER, etc. of a kneader, mixer, mixer, etc., but is not limited thereto.

In another embodiment, the polyvinyl chloride resin composition contains 10 to 200 parts by weight, specifically 30 to 150 parts by weight, more specifically 50 to 100 parts by weight of the plasticizer, based on 100 parts by weight of the polyvinyl chloride resin. it could be It is preferable because it is sufficient to express the desired physical properties such as high heat resistance, high plasticization efficiency and mechanical strength in the above range, but is not limited thereto.

In another embodiment, the polyvinyl chloride resin composition may further include any one or two or more additives selected from the group consisting of a stabilizer, a foaming agent, a filler, and titanium dioxide, if necessary.

The stabilizer is used to prevent various changes in physical properties caused by cleavage and crosslinking of the main chain by separating HCl from the polyvinyl chloride resin to form a polyene structure that is a chromophore, specifically, for example, Ca- Zn-based compounds, K-Zn-based compounds, Ba-Zn-based compounds, organic tin-based compounds; Any one or a mixture of two or more selected from a metallic soap-based compound, a phenol-based compound, a phosphoric acid ester-based compound, or a phosphorous acid ester-based compound may be used. More specifically, Ca-Zn-based compounds; K-Zn-based compounds; Ba-Zn-based compounds; an organic tin-based compound such as a mercaptide-based compound, a maleic acid-based compound, or a carboxylic acid-based compound; metallic soap-based compounds such as Mg-stearate, Ca-stearate, Pb-stearate, Cd-stearate, or Ba-stearate; phenolic compounds; phosphoric acid ester compounds; Alternatively, a phosphorous acid ester-based compound may be used. More preferably, a Ca-Zn-based compound may be used. The content is not limited, but based on 100 parts by weight of the polyvinyl chloride resin, 0.1 to 5 parts by weight, more specifically, 1 to 3 parts by weight may be used.

The blowing agent is not particularly limited as long as it is a compound that decomposes above a specific temperature to generate gas. Specifically, for example, chemical blowing agent azodicarbonamide (azodicarbonamide), azodiisobutyronitrile (azodiisobutyro-nitrile), benzenesulfonylhydrazide (benzenesulfonhydrazide), 4,4-oxybenzenesulfonyl-semicaba Zide (4,4-oxybenzene sulfonyl-semicarbazide), p-toluene sulfonyl semi-carbazide (p-toluene sulfonyl semi-carbazide), barium azodicarboxylate, N,N'-dimethyl-N,N Any one or a mixture of two or more selected from '-dinitrosoterephthalamide (N,N'-dimethyl-N,N'-dinitrosoterephthalamide), trihydrazino triazine, etc. may be used. Examples of the physical foaming agent include inorganic foaming agents such as carbon dioxide, nitrogen, argon, water, air, and helium, or aliphatic hydrocarbons containing 1 to 9 carbon atoms, and aliphatic alcohols containing 1 to 3 carbon atoms. , and an organic blowing agent such as a halogenated aliphatichydrocarbon containing 1 to 4 carbon atoms. The content is not limited, but based on 100 parts by weight of the polyvinyl chloride resin, 0.1 to 10 parts by weight, more specifically 0.5 to 5 parts by weight may be used.

The filler is used to improve productivity, and specifically, for example, any one or a mixture of two or more selected from calcium carbonate, talc, kaolin, silica, alumina, magnesium hydroxide and clay may be used. The content is not limited, but based on 100 parts by weight of the polyvinyl chloride resin, 30 to 200 parts by weight, more specifically 80 to 150 parts by weight may be used.

The titanium dioxide is used to improve whiteness and hiding properties, and its content is not limited, but 1 to 20 parts by weight, more specifically 3 to 15 parts by weight, can be used with respect to 100 parts by weight of the polyvinyl chloride resin. have.

In addition, it may further include at least one additive selected from a UV stabilizer, a thickener, a thixotrophy, an antioxidant, an antistatic agent, a heat stabilizer, a lubricant, a surfactant, and the like.

As another example of the present invention, it is to provide a molded article prepared from the above-described polyvinyl chloride resin composition. The molded article is manufactured through a molding method such as extrusion, injection, powder molding, calendering, blow molding, vacuum molding, etc. of the polyvinyl chloride resin composition, and the molding method commonly used in the industry is not limited and can be used. . In addition, specifically, the molded article, preferably, can be applied to any place where polyvinyl chloride paste resin can be used, for example, pipes, hoses, fittings, hard sheets and films, building materials, electric wire coatings, leather , and hard or soft products such as soles, but are not limited thereto.

In another embodiment, the molded article may have a loss on volatilization of less than 7 wt%, specifically less than 4 wt%, and more specifically less than 3.5 wt%. The molded article has excellent compatibility between the plasticizer of the present invention and the polyvinyl chloride resin, and the loss of volatilization is significantly reduced, and the phenomenon of the plasticizer eluted from the molded article is very small.

Hereinafter, the present invention will be described in more detail based on Examples and Comparative Examples. However, the following examples and comparative examples are merely examples for explaining the present invention in more detail, and the present invention is not limited by the following examples and comparative examples.

[Method of measuring physical properties]

1. Tensile test

The room temperature tensile test was performed in accordance with KS M 3156, and the tensile test after heating was performed in accordance with KS M 3156. After aging the test piece at 100 ° C. for 168 hours in a Geer Oven, tensile strength and elongation were measured. Tensile residual ratio and elongation residual ratio were calculated as ratios to the room temperature tensile test.

100% modulus is the tensile strength when the material is stretched 100% by tension, which means plasticization efficiency, and it is judged that the plasticization efficiency of the material is excellent as the value of 100% modulus is lower. In addition, the tensile test after heating measures the mechanical properties of the material, for example, the elongation residual rate after a certain aging condition (heat treatment), and measures the change rate before and after aging. The closer to , the mechanical properties similar to those before aging. These properties mean the durability of the wire compound for how long it can maintain its initial properties and be used.

2. Loss of volatilization (wt %)

The loss of volatilization was calculated as the ratio of the weight of the specimen before aging to the weight of the specimen after aging after leaving the specimen at 100° C. for 168 hours in a Geer Oven.

3. Heat resistance

The time point at which yellowing and carbonization occurred was measured by discharging the specimen out of the system at a rate of 10 mm per minute in a 200°C oven (Mathis Oven). did The results are indicated by symbols.

<Very good> ◎ > ○ > △ > X <Very poor>

◎: Yellowing occurs, but no carbonization.

○: Yellowing occurred and the carbonization time exceeded 29 minutes.

Δ: Yellowing occurred and the carbonization time had a value between 21 minutes and 29 minutes.

X: Yellowing occurs, and the carbonization time has a value between 16 minutes and 21 minutes.

[Example 1]

1) Preparation of plasticizer

(A) epoxidized fatty acid methyl ester, (B) cyclohexanol ((A):(B)=1 mol:1.5 mol) was put into a reactor and at 130° C. in the presence of sodium methoxide (0.25 mol) as a basic catalyst. The transesterification reaction was carried out for 18 hours.

After completion of the reaction, salts in the reactant were removed using distilled water (200 g). After removing the salt, the compound was dealcoholized at 140° C. and 10 torr for 10 hours at 300 ppm or less to obtain a product. (Yield 98%)

2) Preparation of polyvinyl chloride straight resin composition

Based on 100 parts by weight of polyvinyl chloride straight resin (Hanwha P-1000), 70 parts by weight of the prepared plasticizer, 140 parts by weight of CaCO3 (OMYA 10, Omia Korea), 140 parts by weight of a stabilizer (CZ-400, Complex of Ca-Zn organics, SONGWON) Industrial) 2.5 parts by weight and 5 parts by weight of titanium dioxide (TiO2, average particle diameter 20㎛) were added, and the mixture was kneaded at 175°C for 5 minutes in a two-roll mill, and then 15 at 175°C for 3 minutes using a hot press. After applying a pressure of MPa and cooling to 90° C. or less, a sheet of 1 mm or less was prepared. The physical properties of the prepared specimens were measured and the values are shown in Table 1 below.

[Example 2]

Example 1 (A) was carried out in the same manner as in Example 1, except that the compound of Formula 2 was used instead of the epoxidized fatty acid methyl ester, and the results are listed in Table 1 below.

[Formula 2]

[Comparative Example 1]

It was carried out in the same manner as in Example 1 except that 70 parts by weight of dioctyl phthalate (DOP) was used instead of the prepared plasticizer, and the results are listed in Table 1 below.

[Comparative Example 2]

In Example 1, the same procedure was performed except that (B) n-butanol was used instead of cyclohexanol, and the results are listed in Table 1 below.

division Example 1 Example 2 Comparative Example 1 Comparative Example 2 room temperature
tensile test The tensile strength
(kgf/mm ² ) 1.4 1.1 1.3 0.9 Elongation (%) 313 289 284 277 100% modulus
(kgf/mm ² ) 0.70 0.70 0.68 0.74 after heating
exam Kidney Residual Rate (%) 87 71 67 75 Volatilization loss (wt%) 3.3 6.1 11.0 7.8 heat resistance ◎ ○ X △

As can be seen in Table 1, Examples 1 and 2 according to the present invention showed that the tensile strength and elongation, which are the normal temperature tensile test items, were superior to those of Comparative Examples 1 and 2, and the 100% modulus was Comparative Example 1 and It was found to be similar to or superior to that of 2. After heating, it was confirmed that the test items, such as elongation residual ratio, volatilization loss, and heat resistance, were also greatly excellent. In particular, it was confirmed that Example 1 of the present invention was unexpectedly improved in heat resistance and volatilization loss characteristics compared to Comparative Examples 1 and 2. In addition, it was confirmed that Comparative Example 2 in which an alcohol other than cyclohexanol of the present invention was used was inferior in physical properties to Examples 1 and 2 in which cyclohexanol was used. Moreover, it was confirmed that Example 2 in which hydrogen was substituted in the epoxy group was less effective than Example 1 in which C8 alkyl was substituted.

The present invention described above is merely exemplary, and those of ordinary skill in the art to which the present invention pertains will appreciate that various modifications and equivalent other embodiments are possible therefrom. Therefore, it will be well understood that the present invention is not limited to the form mentioned in the above detailed description. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

Therefore, the spirit of the present invention should not be limited to the described embodiments, and not only the claims described below, but also all of the claims and all equivalents or equivalent modifications to the claims will be said to belong to the scope of the spirit of the present invention. .

Claims (9)

A method for producing a plasticizer for polyvinyl chloride straight resin prepared by transesterification of an epoxidized fatty acid alkyl ester represented by the following formula (1) and cyclohexanol.
[Formula 1]

(The above R ₁ is hydrogen or a C1 to C20 alkyl group, R ₂ is a C1 to C20 alkylene group, and R ₃ is a C1 to C20 alkyl group or a C3 to C20 cycloalkyl group.) The method of claim 1,
R ₁ of the epoxidized fatty acid alkyl ester represented by Formula 1 is A method for producing a plasticizer for a straight polyvinyl chloride resin having a C1 to C20 branched or linear alkyl group. The method of claim 1,
The molar ratio of the epoxidized fatty acid alkyl ester and cyclohexanol is 1: 0.5 to 2.5 mol of a method for producing a plasticizer for a polyvinyl chloride straight resin. The method of claim 1,
The transesterification reaction is a method for producing a plasticizer for polyvinyl chloride straight resin that proceeds under a basic catalyst. The method of claim 1,
The manufacturing method of the plasticizer for polyvinyl chloride straight resin further comprises a purification process. A polyvinyl chloride composition comprising a plasticizer prepared from any one of claims 1 to 5 and a polyvinyl chloride resin. 7. The method of claim 6,
The composition is a polyvinyl chloride composition further comprising at least one additive selected from the group consisting of a stabilizer, a foaming agent, a filler, and titanium dioxide. A molded article prepared from the polyvinyl chloride composition of any one of claims 6 to 7. 9. The method of claim 8,
The molded article is a molded article prepared from a polyvinyl chloride composition having a loss of volatilization of 7 wt% or less.