KR100962985B1 - Vinyl chloride based resin composition containing dioctyl terephthalate DOTP for wallcoverings - Google Patents

Abstract

Disclosed is a vinyl chloride resin composition for wallpaper comprising a vinyl chloride resin and a plasticizer. The plasticizer used in the present invention is dioctyl terephthalate alone or a mixture of dioctyl terephthalate and diisononyl phthalate. The composition of the present invention may include 100 parts by weight of vinyl chloride resin, 50 to 120 parts by weight of plasticizer, 0.5 to 7 parts by weight of stabilizer, 0.5 to 5 parts by weight of foaming agent, 30 to 120 parts by weight of filler and 1 to 20 parts by weight of paper. have. The vinyl chloride-based resin composition for wallpaper according to the present invention has a low emission amount of volatile organic compounds, high stability to the environment, and can realize excellent foam ratio, foam color, foam cell state, and foam heat resistance.

Plasticizer, vinyl chloride resin composition, for wallpaper, volatile organic compound, environmental stability, heat resistance

Description

Vinyl chloride-based resin composition containing dioctyl terephthalate (DOTP) for wallcoverings

The present invention relates to a vinyl chloride-based resin composition which is highly suitable for wallpaper having high environmental safety, excellent foaming properties and heat resistance by minimizing the amount of volatile organic compounds (VOCs).

The vinyl chloride resin is a hybrid polymer containing at least 50% of a vinyl chloride homopolymer and vinyl chloride, and is one of five general-purpose thermoplastic resins produced by suspension polymerization and emulsion polymerization. Among them, polyvinyl chloride resins prepared by emulsion polymerization include plasticizers, stabilizers, fillers, blowing agents, pigments, viscosity depressants, and TiO ₂ . And it is widely used in flooring, wallpaper, tarpaulin, artificial leather, toys, automotive undercoats, etc. by mixing the auxiliary material having a special function in the form of plastisol (Plastisol) through coating molding and mold coating molding processing.

In particular, more than 60% of the wallpaper is made using a vinyl chloride-based resin, and in this industry, there is a problem of minimizing the amount of volatile organic compounds associated with obtaining the HB mark, which is an environmentally friendly certificate. The generation of volatile organic compounds of wallpaper-based vinyl chloride resins is mainly caused by stabilizers, viscosity regulators, and volatile organic solvents used in oil printing, but plasticizers have been reported to be involved in some degree.

Plasticizers used in vinyl chloride resins are mainly phthalate plasticizers, especially DEHP (Di-2-EthylHexyl Phthalate), DBP (Di-Butyl Phthalate), DIDP (Di-IsoDecyl Phthalate), BBP (Butyl Benzyl Phthalate), DINP (Di-IsoNonyl Phthalate) and DNOP (Di-n-Octyl Phthalate) are the most widely used. These phthalate-based plasticizers are suspected to be endocrine disruptors, or environmental hormones, that enter or hinder the action of hormones in animals or humans. There is a need for alternative materials.

Accordingly, the present inventors have excellent heat resistance compared to DEHP (di-2-ethylhexyl phthalate) and DINP (diisononyl phthalate), which are conventionally used as plasticizers, and generate volatile organic compounds with equivalent or excellent levels of foaming properties. To minimize, that is, the high stability to the environment has been developed a vinyl chloride resin composition for wallpaper comprising a DOTP plasticizer advantageous for obtaining the HB mark.

Accordingly, it is an object of the present invention to provide a polyvinyl chloride resin composition for wallpaper having high environmental stability and excellent foaming properties and heat resistance by minimizing the amount of volatile organic compounds generated. Such a vinyl chloride resin composition can realize the excellent physical properties required when used for wallpaper by optimizing the content of components such as vinyl chloride resin, plasticizer, other additives.

The present invention provides a vinyl chloride resin composition for wallpaper comprising a vinyl chloride-based resin and a plasticizer. In the vinyl chloride resin composition for wallpaper according to the present invention, the plasticizer is dioctyl terephthalate alone or a mixture of dioctyl terephthalate and diisononyl phthalate, and the content of the plasticizer is 50 to 120 parts by weight based on 100 parts by weight of the vinyl chloride resin. It is preferable that it is weight part, and it is more preferable that it is 70-90 weight part. The plasticizer may consist of 50-100 wt% dioctyl terephthalate and 0-50 wt% diisononylphthalate, more preferably 70-100 wt% dioctyl terephthalate and 0-30 wt% It may consist of diisononylphthalate. The vinyl chloride-based resin composition for wallpaper according to the present invention also has a stabilizer of 0.5 to 7 parts by weight, a foaming agent of 0.5 to 5 parts by weight, a filler of 30 to 120 parts by weight and 1 to 20 parts by weight based on 100 parts by weight of the vinyl chloride resin. It may further comprise at least one additive selected from the group consisting of.

In particular, the vinyl chloride resin composition for wallpaper according to the present invention has a foam heat resistance of 3 minutes or more when evaluating the time when the yellowness (YI) is 15 or more at 210 ° C., an environmentally friendly building materials organization established by the Korea Air Cleaning Association. When tested according to the quality certification regulations, the emission of formaldehyde is less than 0.015 mg / m2h and the emission of total volatile organic compounds is less than 0.10 mg / m2h.

The vinyl chloride-based resin composition for wallpaper according to the present invention has high stability to the environment, and can realize excellent foam ratio, foam color, foam cell state, and foam heat resistance.

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

First, the dioctyl terephthalate (DOTP) plasticizer used in the composition of the present invention can be prepared by the following method. Preparation method by esterification reaction using terephthalic acid and 2-ethyl hexanol and dimethyl terephthalate and 2-ethyl hexanol Method for producing by ester exchange reaction using as a raw material or polyester resin such as polyethylene terephthalate or polybutylene terephthalate and 2-ethyl hexanol (2 -ethyl hexanol) as a raw material and the production method by the decomposition transesterification (degradative transesterification).

In the preparation of dioctyl terephthalate, catalysts can be used to accelerate the reaction, depending on the reaction temperature. In general, the reaction is carried out at 130 ℃ to 280 ℃, various catalysts are used to suit the appropriate temperature. For example, tetra-isobutyl titanate (TIBT), tetra-isopropyl titanate (TIPT), dibutyl tin oxide, para-toluenesulfonic acid (para-toulene sulfonic acid) acid, PTSA) and the like may optionally be used. Especially paratoluenesulfonic acid or tetraisopropyl titanate is preferable, but it is not limited to this.

The post-treatment after completion of the esterification reaction is not particularly limited, but the excess raw material may be removed by a method such as vacuum distillation and neutralized with a basic solution such as NaOH, KOH, Na ₂ CO ₃ aqueous solution, or the like. . The resultant may then be washed with water, optionally dried under reduced pressure and dehydrated, and then the adsorbent is added and filtered to obtain the final plasticizer composition.

Next, the vinyl chloride resin composition for wallpaper according to the present invention will be described.

The vinyl chloride-based resin composition for wallpaper according to the present invention has excellent foaming properties and heat resistance, and minimizes generation of volatile organic compounds to have environmental stability. In particular, the vinyl chloride-based resin composition for wallpaper according to the present invention contains dioctyl terephthalate as a plasticizer. The dioctyl terephthalate plasticizer has a low heat loss compared to diethylhexyl phthalate (DEHP) having the same molecular weight, which is excellent in heat resistance and is particularly suitable for wallpaper due to its high environmental stability. In the present invention, dioctyl terephthalate alone or a mixture of dioctyl terephthalate and diisononyl phthalate can be used as a plasticizer. At this time, the plasticizer is composed of 50 to 100% by weight, more preferably 70 to 100% by weight of dioctyl terephthalate and 0 to 50% by weight, preferably 0 to 30% by weight of diisononylphthalate.

The vinyl chloride-based resin composition for wallpaper according to the present invention includes 50 to 120 parts by weight of the plasticizer, more preferably 70 to 90 parts by weight, based on 100 parts by weight of the vinyl chloride resin. When the plasticizer is included in the vinyl chloride-based resin composition for wallpaper according to the present invention in less than 50 parts by weight, there is a problem that the workability is lowered due to the low viscosity of the plastisol, when included in excess of 120 parts by weight, the bleeding phenomenon ( A bleeding effect, a phenomenon in which a plasticizer comes out of the surface of a molded article) tends to occur, and the foam cell state tends to be poor.

The vinyl chloride resin composition according to the present invention may further include additives such as a blowing agent, a stabilizer, an auxiliary stabilizer, a filler, and a fat sugar (TiO ₂ ). The additive may be appropriately selected according to the physical properties to be improved in the vinyl chloride resin composition, and the composition according to the present invention may include one or more of the additives.

More specifically, the vinyl chloride resin composition for wallpaper according to the present invention is based on 100 parts by weight of vinyl chloride resin, 50 to 120 parts by weight of the plasticizer, 0.5 to 7 parts by weight of stabilizer, 0.5 to 5 parts by weight of foaming agent, filler 30 ˜120 parts by weight and 1-20 parts by weight of (TiO ₂ ). This is an optimum formulation that satisfies not only the foaming properties required for wallpaper but also the properties such as foaming heat resistance.

In the vinyl chloride resin composition, HCl is separated from polyvinyl chloride to form a polyene structure, which is a chromophore, and may be added for the purpose of preventing various physical property changes caused by cutting and crosslinking of the main chain. The stabilizer is Ca-Zn-based compound; Ba-Zn compound; Organic Tin compounds such as mercaptide compounds, maleic acid compounds or carboxylic acid compounds; Metallic soap-based compounds such as Mg-stearate, Ca-stearate, Pb-stearate, Cd-stearate, or BaBa-stearate; Phenolic compounds; Phosphoric acid ester compounds; Or a phosphite ester compound, and the like, and may be selectively used according to the use. In the present invention, in particular, Ca-Zn-based compounds, preferably Ca-Zn-based composite organic compounds may be used. In the vinyl chloride resin composition according to the present invention, the stabilizer may include 0.5 to 7 parts by weight, more preferably 1 to 4 parts by weight. When the stabilizer is contained in less than 0.5 parts by weight, there is a problem that the thermal stability is poor, and when included in more than 7 parts by weight, there is a problem that more than the required thermal stability is expressed.

In addition, as the blowing agent used in the composition of the present invention, chemical blowing agents or physical blowing agents alone or mixtures thereof may be used. The chemical blowing agent is not particularly limited as long as it decomposes above a specific temperature to generate a gas, and may be azodicarbonamide, azodiisobutyro-nitrile, benzenesulfonhydrazide, 4,4- 4,4-oxybenzene sulfonyl-semicarbazide, p-toluene sulfonyl semi-carbazide, barium azodicarboxylate, N, N'-dimethyl-N, N'-dinitrosoterephthalamide (N, N'-dimethyl-N, N'-dinitrosoterephthalamide), trihydrazino triazine, etc. are mentioned. Examples thereof include sodium bicarbonate, potassium bicarbonate, ammonium bicarbonate, sodium carbonate, ammonium carbonate and the like. In addition, the physical blowing agent may be inorganic foaming agents such as carbon dioxide, nitrogen, argon, water, air, helium, aliphatic hydrocarbons containing 1 to 9 carbon atoms, and aliphatic alcohols containing 1 to 3 carbon atoms. alcohols) and organic foaming agents such as halogenated aliphatic hydrocarbons containing 1 to 4 carbon atoms. Specific examples of such compounds include aliphatic hydrocarbon compounds such as methane, ethane propane, normal butane, isobutane, normalpentane, isopentane and neopentane, and as aliphatic alcohols such as methanol, ethanol, normal propanol and isopropanol As the halogenated aliphatic hydrocarbon compound, methyl fluoride, perfluoromethane, ethyl fluoride, 1,1-difluoroethane, HFC-152a ), 1,1,1-trifluoroethane (1,1,1-trifluoroethane, HFC-143a), 1,1,1,2-tetrafluoroethane (1,1,1,2-tetrafluoroethane, HFC -134a), 1,1,2,2-tetrafluoroethane (1,1,2,2-tetrafluoromethane, HFC-134), 1,1,1,3,3-pentafluorobutane (1,1 , 1,3,3-pentafluorobutane, HFC-365mfc), 1,1,1,3,3-pentafluoropropane (1,1,1,3,3-pentafluoropropane, HFC.sub.13 245fa), penta Fluoroethane, difluorome Difluoromethane, perfluoroethane, 2,2-difluoropropane, 1,1,1-trifluoropropane, purple Fluoropropane, dichloropropane, difluoropropane, difluoropropane, perfluorobutane, perfluorocyclobutane, methyl chloride, methylene chloride ), Ethyl chloride, 1,1,1-trichloroethane, 1,1-dichloro-1-fluoroethane, HCFC-141b), 1-chloro-1,1-difluoroethane (1-chloro-1,1-difluoroethane, HCFC-142b), chlorodifluoromethane (HCFC-22), 1,1- Dichloro-2,2,2-trifluoroethane (1,1-dichloro-2,2,2-trifluoroethane, HCFC-123), 1-chloro-1,2,2,2-tetrafluoroethane (1 -chloro-1,2,2,2-tetrafluoroethane, HCFC-124), trickle Trichloromonofluoromethane (CFC-11), dichlorodifluoromethane (CFC-12), trichlorotrifluoroethane (CFC-113), 1,1,1-trifluoroethane ( 1,1,1-trifluoroethane, pentafluoroethane, dichlorotetrafluoroethane (CFC-114), chloroheptafluoropropane, dichlorohexafluoropropane, and the like Can be mentioned. The amount of the blowing agent is preferably 0.5 to 5 parts by weight based on 100 parts by weight of the vinyl chloride-based resin, but when the content of the blowing agent is too small, the amount of gas generated for foaming is too small, so that the foaming effect is insignificant or not expected at all. In the case of too many, the amount of gas generated is too large to expect the required physical properties.

By adding a filler to the composition of the present invention, it is possible to improve the productivity of the vinyl chloride resin composition and the dry touch feeling. The filler may be calcium carbonate, clay, talc or diatomaceous earth, and the like. In the vinyl chloride-based resin composition according to the present invention, the filler may be included 30 to 120 parts by weight, more preferably 50 to 100 parts by weight. When the filler is included in less than 50 parts by weight, there is a problem that the dimensional stability and economics are lowered, when included in excess of 100 parts by weight, the foam surface is not good, there is a problem that the workability is lowered.

By adding fat-sugar (TiO ₂ ) to the composition of the present invention, the whiteness and concealability of the vinyl chloride resin composition can be improved. In the vinyl chloride-based resin composition according to the present invention, the fat sugar may preferably include 1 to 20 parts by weight, more preferably 3 to 15 parts by weight. When the fat is contained in less than 3 parts by weight, the whiteness and concealability is poor, the color does not come out properly after printing, if included in more than 15 parts by weight, there is a problem that the foam surface is lowered.

The vinyl chloride-based resin composition for wallpaper according to the present invention may be prepared by a generally known method using a vinyl chloride-based resin, the plasticizer, and optionally an additive, and is not particularly limited in the method.

The vinyl chloride resin composition for wallpaper of the present invention formed as described above includes dioctyl terephthalate (DOTP) alone or a mixture of dioctyl terephthalate and diisononyl terephthalate (DINP) as a plasticizer instead of DEHP used in the past. In addition, it provides excellent foaming heat resistance and environmental friendliness by optimizing the blending ratio of additives such as a blowing agent which can obtain suitable physical properties for wallpaper application. Therefore, the vinyl chloride-based resin composition according to the present invention has a foam heat resistance of 3 minutes or more when applied to a wallpaper to evaluate the time when the yellowness (YI) is 15 or more at 210 ° C., and is an eco-friendly construction established by the Korea Air Cleaning Association. When tested according to the material quality certification regulation, the emission of formaldehyde is less than 0.015 mg / m2h and the emission of total volatile organic compounds is less than 0.10 mg / m2h. Such foam heat resistance and environmental friendliness could not be obtained by using a plasticizer such as DEHP, which is conventionally used, and can be obtained only when the vinyl chloride-based resin composition of the present invention is applied.

Hereinafter, the present invention will be described in more detail with reference to Examples. However, the following examples are only examples of the present invention, and the scope of the present invention should not be understood as being limited thereto.

(Preparation of Plasticizer Composition)

Production Example  One

249.21 g of terephthalic acid, 781.38 g of 2-ethyl hexanol and 1.00 g of tetra-isopropyl titanate (TIPT) as a catalyst were added to a four-necked 2L round flask equipped with a stirrer and a condenser. The reaction was carried out for 9 hours while heating up to remove the reaction product water.

After the reaction, unreacted terephthalic acid and excess 2-ethyl hexanol were removed under reduced pressure using a vacuum pump at 150-220 ° C, and neutralized water washing process was carried out using 10% by weight sodium hydroxide solution and 10% by weight forget-me-not solution. After sequentially performing dehydration under reduced pressure, the adsorbent was added to the reaction product from which the water was removed, filtered through a filter medium, and finally, dioctyl terephthalate (DOTP) having a purity of 99.7% was obtained.

(Production of Vinyl Chloride Resin Composition)

By the following method, the vinyl chloride resin composition Examples 1 to 5 were prepared according to the present invention using the plasticizer of Preparation Example 1 by mixing and coating each component according to the composition ratio of Table 1, on the other hand, the composition ratio of Table-1 Each component was mixed and coated according to the vinyl chloride resin composition Comparative Examples 1 and 2.

Example

For specimens prepared using the vinyl chloride resin compositions obtained in Examples 1 to 5 and Comparative Examples 1 and 2, foaming ratio, foaming color, foaming cell state, foaming heat resistance, HB mark (total volatile organic compound) were as follows. (TVOC) and formaldehyde (HCHO)) were evaluated and the results are shown in Table-2.

Example  One

Based on 100 parts by weight of polyvinyl chloride resin, 70 parts by weight of the plasticizer DOTP, 3 parts by weight of stabilizer, 3 parts by weight of foaming agent, 80 parts by weight of filler, and 15 parts by weight of paper according to the multi-step divided dose mixing method according to the multi-step divided paper mixing method. It was coated with a thickness of 0.1 ~ 0.2mm in a semi-finished product by heating for 40 seconds at 165 ℃ in a foam chamber, and after the 40 seconds at 230 ℃ in the printing process and embossing process to prepare a final wallpaper product, each physical property Are shown in Table-2.

Example  2

Except for using the plasticizer DOTP 75 parts by weight based on 100 parts by weight of polyvinyl chloride resin was prepared in the same manner as in Example 1, each physical property is shown in Table-2.

Example  3

100 parts by weight of polyvinyl chloride resin was prepared in the same manner as in Example 1 except that 80 parts by weight of the plasticizer DOTP was used, and the physical properties thereof are shown in Table-2.

Example  4

100 parts by weight of polyvinyl chloride resin was prepared in the same manner as in Example 1, except that 85 parts by weight of the plasticizer DOTP was used, and the physical properties thereof are shown in Table-2.

Example  5

Except for using the plasticizer DOTP 90 parts by weight based on 100 parts by weight of polyvinyl chloride resin was prepared in the same manner as in Example 1, each physical property is shown in Table-2.

Comparative example  One

A plasticizer was prepared in the same manner as in Example 1, except that DEHP (Di-ethylhexyl phthalate) was used based on 100 parts by weight of polyvinyl chloride resin, and the physical properties thereof are shown in Table-2.

Comparative example  2

A plasticizer was prepared in the same manner as in Example 1 except that 100 parts by weight of polyvinyl chloride resin was used as a di-isononyl phthalate (DINP), and the physical properties thereof are shown in Table-2.

(Performance evaluation)

Expansion ratio

It can be obtained by the following equation.

Foam ratio = wall thickness of finished product / thickness of semifinished product

Foamed color

After heating the semi-finished wallpaper for 40 seconds at 230 ℃, measure the whiteness index (W.I.) with a colorimeter.

Foam Cell  condition

After heating the wallpaper semi-finished product at 230 ℃ for 40 seconds, the cross section was observed with an optical microscope

Evaluate even cell size.

Foam heat resistance

Time for semi-finished wallpaper to be pushed out by 19 mm (3.8 mm / min) at 210 ℃ using Mathis oven at 5 minutes interval, and time when yellow index (YI) is measured by colorimeter Evaluate.

HB  Mark

The HB mark is a strict and thorough quality certification test by an accredited testing institute according to the quality certification regulations of eco-friendly building materials group established by the Korea Air Cleaning Association, for the emission of organic compounds (TVOC, HCHO) for building materials produced at home and abroad. As a result, it is a mark that gives a product a certification level. The certification grade of the wallpaper is determined by the table below, and the grade is indicated by the number of clover in the certification mark. If the number of clover is 5, the best, 4 is excellent, 3 is good, 2 is general I, and 1 is general II.

From Table 2, it can be seen that Examples 1 to 5 have the same or better foaming properties and foaming heat resistance than Comparative Examples 1 and 2, and are advantageous in obtaining eco-friendly certificate HB mark.

In addition, in the case of Example 5 DOTP plasticizer to 90 parts by weight compared to the general plasticizers DEHP and DINP of Comparative Examples 1 and 2 shows a level of foam properties equal or more, in particular, it can be confirmed that the foam heat resistance is very excellent.

In addition, the vinyl chloride resin composition Examples 6 to 10 according to the present invention using the plasticizer of Preparation Example 1 were prepared by mixing and coating each component according to the composition ratio of Table-3 in the following manner.

Example  6

The mixing ratio of DOTP and DINP in 85 parts by weight of the polyvinyl chloride resin is 9 to 1 in 85 parts by weight of the plasticizer, and 3 parts by weight of the stabilizer, 3 parts by weight of the blowing agent, 100 parts by weight of the filler, and 15 parts by weight of the multi-step divided dosage formulation. After stirring / maturation according to the method, the coating was coated with a thickness of 0.1 to 0.2 mm on the wallpaper paper, and then a semi-finished product was prepared by heating at 165 ° C. for 40 seconds in a foaming chamber, and then heating at 230 ° C. for 40 seconds in a printing process and an embossing process. The final product was prepared, and the physical properties are shown in Table-4.

Example  7

100 parts by weight of polyvinyl chloride resin was prepared in the same manner as in Example 6 except that the mixing ratio of DOTP and DINP in 85 parts by weight of the plasticizer was 8 to 2, and the physical properties thereof are shown in Table-4. .

Example  8

100 parts by weight of polyvinyl chloride resin was prepared in the same manner as in Example 6 except that the mixing ratio of DOTP and DINP in 85 parts by weight of the plasticizer was 7 to 3, and the physical properties thereof are shown in Table-4. .

Example  9

It was prepared in the same manner as in Example 6 except that the mixing ratio of DOTP and DINP was 6 to 4 in 85 parts by weight of the plasticizer based on 100 parts by weight of the polyvinyl chloride resin, and the physical properties thereof are shown in Table-4. .

Example  10

Except for using a 5 to 5 mixing ratio of DOTP and DINP in 85 parts by weight of the plasticizer with respect to 100 parts by weight of polyvinyl chloride resin was prepared in the same manner as in Example 6, and the physical properties are shown in Table-4 .

From Table 4, Examples 6 to 8 are excellent in foaming properties, but Examples 9 to 10 blended DOTP and existing general-purpose plasticizer DINP in the present invention by confirming that foaming color, foaming cell state and foaming heat resistance are lowered. The ratio of 7 to 3 or more is preferable for wallpaper, and it can be confirmed that it is advantageous for obtaining the HB mark of eco-friendly certificate.

The vinyl chloride-based resin composition according to the present invention comprises dioctyl terephthalate (DOTP) alone or a mixture of dioxonyl phthalate (DINP) as a plasticizer and a suitable combination of stabilizers, foaming agents, fillers and fats As a result, the amount of volatile organic compounds generated in the existing wallpaper is minimized, that is, the stability to the environment is high, so that favorable properties for acquiring the HB mark can be realized, and excellent foaming properties, particularly foaming heat resistance, suitable for wallpaper are provided.

Claims (9)

In a vinyl chloride resin composition comprising a vinyl chloride resin and a plasticizer, 100 parts by weight of vinyl chloride resin; And 50 to 120 parts by weight of a mixture of dioctyl terephthalate and diisononyl phthalate as a plasticizer; , ≪ / RTI > The mixture of dioctyl terephthalate and diisononyl phthalate is a wallpaper comprising dioctyl terephthalate, characterized in that the weight ratio of dioctyl terephthalate and diisononyl phthalate is 9: 1 to 7: 3 (DOTP: DINP) Vinyl chloride-based resin composition. delete The method of claim 1, Vinyl chloride-based resin composition for wallpaper comprising a dioctyl terephthalate, characterized in that the content of the plasticizer is 70 to 90 parts by weight. delete delete The method of claim 1, The additive further comprises at least one additive selected from the group consisting of 0.5 to 7 parts by weight of stabilizer, 0.5 to 5 parts by weight of foaming agent, 30 to 120 parts by weight of filler and 1 to 20 parts by weight of paper per 100 parts by weight of the vinyl chloride resin. Vinyl chloride-based resin composition for wallpaper comprising dioctyl terephthalate, characterized in that. The method of claim 1, The vinyl chloride-based resin composition is a vinyl chloride-based resin composition for a wallpaper containing dioctyl terephthalate, characterized in that the foaming heat resistance is at least 3 minutes when evaluating the time when the yellowness (Y.I.) at 15 ℃. The method of claim 1, The vinyl chloride resin composition has a release amount of formaldehyde less than 0.015 mg / m 2 and a total emission of 0.10 mg / m 2 h when tested according to the group quality certification regulations of eco-friendly building materials established by Korea Air Cleaning Association. Vinyl chloride type resin composition for wallpaper containing dioctyl terephthalate which is less than. The method of claim 1, The dioctyl terephthalate is a wallpaper comprising dioctyl terephthalate, which is prepared by esterifying terephthalic acid and 2-ethylhexanol at 130 to 280 ° C under a catalyst of tetraisopropyl titanate or paratoluenesulfonic acid. Vinyl chloride-based resin composition.