JP7413767B2 - Vinyl chloride resin for paste processing and vinyl chloride resin composition for paste processing using the same - Google Patents

Description

The present invention relates to a vinyl chloride resin for paste processing (hereinafter sometimes abbreviated as paste vinyl chloride) and a paste vinyl chloride composition obtained therefrom, and more specifically, it has a high expansion ratio and good chemical embossability. The present invention relates to a paste PVC which provides a plastisol from which a foam with excellent thermal stability can be obtained, and a paste PVC composition obtained therefrom.

Paste PVC is generally processed into a paste PVC sol by kneading it with compounding agents such as plasticizers, stabilizers, and blowing agents, and various molded products can be obtained by various processing methods. Among them, construction materials such as wallpaper, flooring, and foam sheets are one of the main uses of paste PVC.

In general, wallpaper, flooring materials, foam sheets, etc. are manufactured through a process of creating a base fabric in which paste PVC sol is applied to a backing material such as flame-retardant paper and heated, a printing process in which the base fabric is colored by gravure printing, etc. It is manufactured using a method that consists of a foaming process in which the fabric is heated and foamed, and an embossing process in which a pattern is attached to the foam.

In the foaming process for controlling the thickness of the product, if a foam with a high magnification ratio can be obtained, the thickness of the original fabric can be reduced and the amount of paste PVC sol used can be reduced. Therefore, a paste vinyl chloride sol that can obtain a foam with a high magnification is desired from the viewpoint of reducing environmental burden and manufacturing cost.

Furthermore, embossing methods are broadly classified into chemical embossing methods, in which a pattern is applied by applying an inhibitory ink that suppresses the decomposition of the foaming agent, and mechanical embossing methods, in which an embossing roll is used. In the chemical embossing method, the larger the difference in unevenness between the foaming part and the foaming suppressing part, the better the design, so a paste vinyl chloride sol that has a good foaming suppressing effect in the area where the suppressing ink is applied is desired.

If the obtained foam is colored, the appearance of the product will deteriorate, so a paste vinyl chloride sol with less coloring is desired. Coloring of the foam occurs when the blowing agent is insufficiently decomposed and when the thermal decomposition of the vinyl chloride resin progresses. The most commonly used organic blowing agent, azodicarbonamide itself, is yellow in color, so if the blowing agent is insufficiently decomposed, the product will be colored yellow. In addition, when the temperature of vinyl chloride resin reaches 170 to 180°C, chlorine and hydrogen in the molecule are desorbed and hydrogen chloride is generated significantly. Once decomposed, an unstable part is created in the molecular structure, so hydrogen chloride is released. Separation is promoted and decomposition progresses in a chain reaction. There is a method of increasing the heating temperature and lengthening the heating time in order to suppress the coloration caused by the undecomposed foaming agent, but there is a problem that coloration due to thermal decomposition of the vinyl chloride resin due to heating progresses. Particularly in applications such as flooring and foam sheets, the coating thickness of the base material is thick and the heating time during the foaming process becomes long, resulting in decomposition of the vinyl chloride resin due to heating and deterioration of the color of the product, resulting in thermal stability. There is a need for a paste vinyl chloride and a paste vinyl chloride composition comprising the same that can produce a foam with excellent properties.

For example, in Patent Document 1, in order to provide a vinyl chloride resin that exhibits excellent chemical embossability, a manufacturing method characterized in that the pH of an aqueous dispersion of a paste vinyl chloride resin and a blend resin is adjusted within a specific range. is proposed.

Further, Patent Document 2 describes a base material layer made of a vinyl chloride resin composition for chemical embossing containing a paste vinyl chloride resin, a plasticizer, a chemical foaming agent, zinc oxide, and a foaming inhibitor, and a base material layer printed on the surface thereof. A vinyl chloride resin sheet that exhibits excellent chemical embossability and is composed of an ink layer containing a foaming inhibitor has been proposed.

Patent No. 3576351 Japanese Patent Application Publication No. 2006-272804

The paste PVC resin proposed in Patent Document 1, which is obtained by adjusting the pH of the aqueous dispersion within a specific range, exhibits good chemical embossability with a foaming suppression rate of about 35 to 45%, but even higher It is difficult to meet the requirements for chemical embossability.

Furthermore, the resin compositions proposed in Patent Documents 1 and 2 are aimed at improving chemical embossability when foamed, and no consideration is given to the thermal stability of the foam. be.

Therefore, the present invention solves these problems and provides a paste PVC that can provide a foam that has a high expansion ratio, good chemical embossability, and excellent thermal stability, which cannot be obtained with conventional paste PVC. The object of the present invention is to provide a novel paste PVC composition that can be used as a paste.

In view of the above problems, as a result of intensive studies, the present inventors have found that a paste PVC containing a specific amount of water-soluble organic acid provides a foam that has a high expansion ratio, good chemical embossability, and excellent thermal stability. The present inventors have discovered that the present invention can be obtained, and have completed the present invention.

That is, the present invention relates to a paste PVC characterized by containing 150 to 500 ppm of a water-soluble organic acid based on the vinyl chloride resin, and a paste PVC composition comprising the same.

The present invention will be explained in detail below.

The paste PVC of the present invention contains 150 to 500 ppm of a water-soluble organic acid based on the vinyl chloride resin, and preferably 200 to 500 ppm, since it can provide a plastisol with particularly excellent chemical embossing properties. It is preferably 250 to 500 ppm. Here, if the content of the water-soluble organic acid is less than 150 ppm, the effect of improving chemical embossability when formed into a foam will not be exhibited. On the other hand, if it exceeds 500 ppm, the expansion ratio and thermal stability of the foamed product will decrease.

Here, the water-soluble organic acid may be any organic acid that shows solubility in an aqueous medium, such as acetic acid, chloroacetic acid, dichloroacetic acid, trichloroacetic acid, nicotinic acid, benzenesulfonic acid, benzoic acid, tartaric acid, malic acid. , formic acid, butyric acid, citric acid, succinic acid, oxalic acid, picric acid, picolinic acid, phthalic acid, sulfamic acid, aspartic acid, glycolic acid, glutamic acid, fumaric acid, maleic acid, malonic acid, lactic acid, oleic acid, erythorbic acid , ascorbic acid, etc., and those having four or more hydroxy groups and one or more ester groups in the molecule are particularly preferred. Further, these may be used alone or in combination of two or more.

Furthermore, examples of the vinyl chloride resin constituting the paste vinyl chloride of the present invention include vinyl chloride homopolymer resins and vinyl chloride copolymer resins, and examples of monomers copolymerizable with vinyl chloride monomers include vinyl acetate. , vinyl esters such as vinyl propionate, vinyl myristate, and vinyl benzoate; unsaturated carboxylic acids such as acrylic acid, methacrylic acid, maleic acid, and fumaric acid, or their anhydrides; methyl acrylate, ethyl acrylate, and acrylic acid. Acrylic acid esters such as butyl; Methacrylic acid esters such as methyl methacrylate, ethyl methacrylate, and butyl methacrylate; Unsaturated carboxylic acid esters such as maleic acid ester, fumaric acid ester, and cinnamic acid ester; Vinyl methyl ether , vinyl ethers such as vinyl amyl ether, and vinyl phenyl ether; monoolefins such as ethylene, propylene, butene, and pentene; vinylidene chloride, styrene, and their derivatives; acrylonitrile, methacrylonitrile, etc.; It may be one in which more than one type is copolymerized. In particular, the degree of polymerization is preferably 1000 to 1500, more preferably 1100 to 1400, since it is possible to provide a paste PVC composition with excellent chemical embossing properties that make the unevenness clear, and foaming properties that provide a high expansion ratio.

The paste PVC of the present invention is manufactured by using a polymerization initiator, an emulsifier, an emulsification aid, a buffer, a higher alcohol, a higher fatty acid, a higher fatty acid ester, a dispersion aid such as chlorinated paraffin, a polymerization degree regulator, etc. It may also contain substances that are commonly added. In addition, methods for producing paste PVC include general emulsion polymerization, micro-suspension polymerization, seeded emulsion polymerization, and seeded micro-suspension polymerization. It can be manufactured as a paste PVC by removing water from vinyl resin latex.

Examples of methods for removing moisture from vinyl chloride resin latex include spray drying, fluidized bed drying, ventilation drying, rotary drying, and conduction heating drying. A method by drying is preferred.

Below, a seed microsuspension polymerization method will be shown as an example of a method for obtaining the vinyl chloride resin latex used to form the paste PVC of the present invention.

The seed micro-suspension polymerization method consists of 1) the first step of obtaining a vinyl chloride resin seed latex containing a vinyl chloride resin containing an oil-soluble polymerization initiator by a micro-suspension polymerization method, and 2) the obtained seed latex. Polymerize vinyl chloride monomer, or vinyl chloride monomer and a monomer copolymerizable with it, with gentle stirring in the presence of deionized water, an emulsifier, a buffer, and if necessary an emulsification aid such as a higher alcohol. This is a polymerization method consisting of a second step in which a vinyl chloride resin latex is obtained by enlarging the seed latex.

Here, examples of the monomer copolymerizable with the vinyl chloride monomer include those mentioned above.

Examples of emulsifiers include alkyl sulfate ester salts such as sodium lauryl sulfate and myristyl sulfate; alkylaryl sulfonates such as sodium dodecylbenzenesulfonate and potassium dodecylbenzenesulfonate; sodium dioctylsulfosuccinate and dihexylsulfosuccinate. Sulfosuccinates such as sodium; Fatty acid salts such as ammonium laurate and potassium stearate; Anionic emulsifiers such as polyoxyethylene alkyl sulfate salts and polyoxyethylene alkylaryl sulfate salts: Sorbitan monooleate, polyoxyethylene sorbitan mono One or more conventionally known emulsifiers such as sorbitan esters such as stearate; polyoxyethylene alkylphenyl ethers; and nonionic emulsifiers such as polyoxyethylene alkyl esters can be used.

Examples of the buffer include alkali metal monohydrogen phosphate, alkali metal dihydrogen phosphate, potassium hydrogen phthalate, sodium hydrogen carbonate, boric acid-caustic potassium solution, and the like.

Examples of emulsifying aids used as necessary include higher alcohols such as cetyl alcohol and lauryl alcohol; higher fatty acids such as lauric acid, palmitic acid, and stearic acid; esters thereof; aromatic hydrocarbons, higher fatty acid hydrocarbons, Examples include halogenated hydrocarbons such as chlorinated paraffin.

The vinyl chloride resin seed latex containing an oil-soluble polymerization initiator used in the seed microsuspension polymerization method can be prepared by the following microsuspension polymerization method. First, a dispersion aid such as a vinyl chloride monomer, an oil-soluble polymerization initiator, a surfactant, a buffer, a higher alcohol, a higher fatty acid, a higher fatty acid ester, a chlorinated paraffin, and a polymerization degree regulator are added as necessary. Premix and homogenize using a homogenizer to prepare oil droplets. As the homogenizer at this time, for example, a colloid mill, a vibration stirrer, a two-stage high-pressure pump, etc. can be used. Then, the homogenized liquid is sent to a polymerization vessel, and the temperature inside the polymerization vessel is raised while stirring gently to initiate a polymerization reaction. By polymerizing until a predetermined conversion rate is reached, an oil-soluble polymerization initiator is added. It is possible to prepare a seed latex containing:

As the oil-soluble polymerization initiator, diacyl peroxide having a 10-hour half-life temperature of 30 to 70°C is preferred, and examples of such polymerization initiators include isobutyryl peroxide, 3,3,5-trimethylhexanoyl peroxide, oxide, octanoyl peroxide, lauroyl peroxide, stearoyl peroxide, succinic acid peroxide, and the like.

Then, in step 2), the obtained vinyl chloride resin seed latex containing an oil-soluble polymerization initiator is enlarged in the presence of a vinyl chloride monomer, etc., and polymerized to form a vinyl chloride resin latex. It is possible to do so.

The paste PVC of the present invention can be obtained by preparing vinyl chloride resin latex by these methods, adjusting the water-soluble organic acid content (addition of water-soluble organic acid, etc.), and treating it with a spray dryer etc. .

The paste vinyl chloride of the present invention can be used as a paste vinyl chloride composition for various purposes by adding a plasticizer, a filler, a blowing agent, etc. In this case, it is preferable that the composition contains 20 to 200 parts by weight of a plasticizer per 100 parts by weight of paste PVC, especially when forming a foam. Contains 20 to 200 parts by weight of plasticizer, 1 to 300 parts by weight of filler, 0.1 to 30 parts by weight of blowing agent, and 0.1 to 30 parts by weight of stabilizer per 100 parts by weight of PVC. is preferred.

Examples of plasticizers include phthalate esters such as bis(2-ethylhexyl) phthalate (sometimes abbreviated as DOP), diisononyl phthalate, diisodecyl phthalate, and dibutyl phthalate; adipic acid (2-ethylhexyl) , adipate esters such as diisononyl adipate; trimellitic acid esters such as tri(2-ethylhexyl) trimellitate, triisodecyl trimellitate, trin-octyl trimellitate; tri(2-ethylhexyl) phosphate, phosphorus Phosphoric acid esters such as tricresyl acid and tricylenyl phosphate; Benzoic acid esters such as diethylene glycol dibenzoate and dipropylene glycol dibenzoate; Other polyester plasticizers, sebacic acid ester, mazelaic acid ester, maleic acid ester, epoxidized vegetable oil, etc. , those commonly used as plasticizers can be used.

Examples of the filler include calcium carbonate, diatomaceous earth, magnesium carbonate, and titanium oxide.

Examples of blowing agents include inorganic blowing agents such as sodium bicarbonate, ammonium carbonate, ammonium bicarbonate, ammonium nitrite, amide compounds, and sodium borohydride; isocyanate compounds, azodicarbonamide, azobisisobutyronitrile, and barium. Azo compounds such as azodicarboxylate; hydrazine derivatives such as p,p'-oxybisbenzenesulfonylhydrazide and p-toluenesulfonylhydrazide; nitroso compounds such as semicarbazide compounds, azide compounds, and dinitrosopentamethylenetetramine; triazole compounds, etc. Examples include organic blowing agents. It is also possible to use the above-mentioned foaming agent together with a decomposition accelerator such as zinc white (zinc oxide), if necessary.

Examples of the stabilizer include epoxy stabilizers, barium stabilizers, calcium stabilizers, tin stabilizers, and zinc stabilizers. Furthermore, commercially available composite stabilizers such as calcium-zinc type, barium-zinc type, etc. can also be used.

Furthermore, when preparing a paste PVC composition, additives that are normally added to paste PVC compositions, such as antioxidants, flame retardants, diluents, lubricants, and ultraviolet absorbers, may be added to the extent that does not exceed the purpose of the present invention. , coloring agents such as pigments, surfactants, antistatic agents, etc. may be added, and the amounts thereof may be within the generally used ranges.

The paste PVC of the present invention has a high expansion ratio, good chemical embossability, and can provide a foam with excellent thermal stability, and its industrial value is extremely high.

Next, the present invention will be explained in more detail with reference to Examples and Comparative Examples, but the present invention is not limited thereto.

Below, methods for evaluating the paste PVC, compositions, and foams obtained in Examples will be shown.

<Average particle diameter>
Using a laser diffraction/scattering particle size distribution analyzer (Horiba, Ltd., (trade name) LA-920), measurements were performed twice under the condition of a refractive index of 1.16 to determine the average particle size.

<Degree of polymerization>
The degree of polymerization was calculated by solution viscosity measurement using a JIS K6721 Ubbelohde viscometer.

<Foaming ratio>
The foaming ratio was calculated using the following formula (1).
Foaming ratio = Foam thickness / Original fabric thickness (1)
Since it has excellent design properties when used as wallpaper and flooring materials, it was determined that products with a foaming ratio of 4.0 times or more were excellent in foamability.

<Chemical embossability>
Trimellitic anhydride was applied as a suppressing ink to the obtained original fabric, foaming was performed at 200° C. for 170 seconds, and the difference in unevenness due to chemical embossing was measured. The suppression ratio was calculated using the following formula (2).
Suppression ratio = unevenness difference / foam thickness x 100 (2)
Since it has excellent design properties when used as wallpaper and flooring materials, those with a suppression ratio of 50.0% or more were judged to have excellent chemical embossing properties.

<Foaming hue>
The YI value of the obtained foam was measured using a color difference meter (manufactured by Konica Minolta, Inc., (trade name) CR-5). Generally, the smaller the YI value, the closer the color is to white, so those of 25 or less were judged to have excellent hue.

Synthesis Example 1 (Preparation of vinyl chloride resin seed latex containing an oil-soluble polymerization initiator)
360 kg of deionized water, 300 kg of vinyl chloride monomer, 5.7 kg of lauroyl peroxide, and 30 kg of a 15% by weight sodium dodecylbenzenesulfonate aqueous solution were placed in a 1 m ³ stainless steel autoclave, and the polymerization solution was circulated for 3 hours using a homogenizer to make it homogeneous. After the chemical treatment, the temperature of the reaction system was raised to 45° C. to initiate polymerization. After the pressure of the polymerization system was reduced, the unreacted vinyl chloride monomer was recovered to obtain an oil-soluble polymerization initiator-containing vinyl chloride resin seed latex (a) with a solid content of 35% by weight and an average particle size of 0.55 μm. .

Production example 1 (vinyl chloride resin latex)
In a 2.5 L stainless steel autoclave, 500 g of deionized water, 800 g of vinyl chloride monomer, 16.5 g of 5% by weight sodium lauryl sulfate, 10.6 g of 1% by weight boric acid-potassium hydroxide solution, average particles obtained according to Synthesis Example 1. 86.9 g of vinyl chloride resin seed latex (a) containing an oil-soluble polymerization initiator with a diameter of 0.55 μm and 4.0 g of 0.1% by weight copper sulfate were charged, and the temperature of this reaction mixture was raised to 55° C. to initiate polymerization. It started. During the polymerization, 160 g of a 0.05% by weight aqueous erythorbic acid solution was continuously added to maintain the polymerization temperature, and when the polymerization pressure decreased from the saturated vapor pressure of vinyl chloride monomer at 55°C to 0.471 MPa, the polymerization started. has ended. The amount of erythorbic acid added during polymerization was 100 ppm based on the vinyl chloride resin. Note that 104.8 g of 5% by weight sodium lauryl sulfate was continuously added from the start of the polymerization until the end of the polymerization. After the polymerization was completed, unreacted vinyl chloride monomer was collected to obtain vinyl chloride resin latex. The vinyl chloride resin in the obtained vinyl chloride resin latex contained vinyl chloride resin having an average particle diameter of 1.1 μm and an average degree of polymerization of 1200.

Example 1
To 1 kg of the vinyl chloride resin latex obtained in Production Example 1 (average particle size: 1.1 μm, degree of polymerization: 1200), a 1% by weight aqueous solution of erythorbic acid was added so that the amount of erythorbic acid was 50 ppm relative to the vinyl chloride resin. and spray-dried using a rotating disk type spray dryer at a hot air temperature of 158°C and an outlet temperature of 55°C. Finely powdered paste PVC was obtained by crushing the granular paste PVC obtained by drying. The resulting paste vinyl chloride contained 150 ppm of erythorbic acid based on the vinyl chloride resin.

To 100 parts by weight of the obtained paste PVC, 56 parts by weight of DOP (manufactured by Daihachi Kagaku Kogyo Co., Ltd.) as a plasticizer and calcium carbonate (manufactured by Nitto Funka Kogyo Co., Ltd., (trade name) NN#500 as a filler) ) 35 parts by weight, 5 parts by weight of titanium oxide (Teika Co., Ltd., (trade name) JR600A) as a pigment, 2 parts by weight of a blowing agent (Otsuka Chemical Co., Ltd., (trade name) AZ Ultra 1050), 1 weight part of zinc oxide. (Daikyo Kasei Co., Ltd., (trade name) MZ-100) and 3 parts by weight of an epoxy plasticizer (ADEKA Co., Ltd., (trade name) ADEKASIZER O-130P) were kneaded using a dissolver. , a paste PVC composition was obtained.

The obtained paste PVC composition was coated to a thickness of 0.35 mm on flame-retardant paper that had been heated in advance at 180°C for 5 seconds, and then heated at 180°C for 12 seconds to obtain a raw fabric. After measuring the thickness of the obtained raw fabric, a suppressing ink (trimellitic anhydride) was applied using a gravure printing machine, and an embossed foam was obtained by heating at 200° C. for a predetermined period of time.

The obtained embossed foam had an expansion ratio of 4.3 times, a suppression ratio of 54%, and a hue of YI value of 18.7, and was excellent as a chemically embossed foam. The evaluation results are shown in Table 1.

Example 2
A paste PVC, a paste PVC composition, and a foam were obtained in the same manner as in Example 1, except that instead of adding 50 ppm of erythorbic acid to the vinyl chloride resin, 100 ppm of erythorbic acid was added to the vinyl chloride resin. Ta.

The resulting paste vinyl chloride contained 200 ppm of erythorbic acid based on the vinyl chloride resin. Further, the obtained embossed foam had an expansion ratio of 4.3 times, a suppression ratio of 58%, and a hue of YI value of 18.4, and was excellent as a chemically embossed foam. The evaluation results are shown in Table 1.

Example 3
Paste PVC, paste PVC composition, and foam were obtained in the same manner as in Example 1, except that 150 ppm of erythorbic acid was added to the vinyl chloride resin instead of 50 ppm of erythorbic acid to the vinyl chloride resin. Ta.

The resulting paste vinyl chloride contained 250 ppm of erythorbic acid based on the vinyl chloride resin. Further, the obtained embossed foam had an expansion ratio of 4.3 times, a suppression ratio of 62%, and a hue of YI value of 19.3, and was excellent as a chemically embossed foam. The evaluation results are shown in Table 1.

Example 4
Paste PVC, paste PVC composition, and foam were obtained in the same manner as in Example 1, except that 200 ppm of erythorbic acid was added to the vinyl chloride resin instead of 50 ppm of erythorbic acid to the vinyl chloride resin. Ta.

The resulting paste vinyl chloride contained 300 ppm of erythorbic acid based on the vinyl chloride resin. Furthermore, the obtained embossed foam had an expansion ratio of 4.3 times, a suppression ratio of 65%, and a hue of YI value of 20.8, and was excellent as a chemically embossed foam. The evaluation results are shown in Table 1.

Example 5
Paste PVC, paste PVC composition, and foam were obtained in the same manner as in Example 1, except that 400 ppm of erythorbic acid was added to the vinyl chloride resin instead of 50 ppm of erythorbic acid to the vinyl chloride resin. Ta.

The resulting paste vinyl chloride contained 500 ppm of erythorbic acid based on the vinyl chloride resin. Further, the obtained embossed foam had an expansion ratio of 4.1 times, a suppression ratio of 65%, and a hue of YI value of 21.6, and was excellent as a chemically embossed foam. The evaluation results are shown in Table 1.

Comparative example 1
A paste PVC, a paste PVC composition, and a foam were obtained in the same manner as in Example 1, except that erythorbic acid was not added after polymerization.

The resulting paste vinyl chloride contained 100 ppm of erythorbic acid based on the vinyl chloride resin. Further, the obtained embossed foam had a foaming ratio of 4.3 times, a suppression ratio of 49%, and a hue of YI value of 17.9, showing poor chemical embossing properties. The evaluation results are shown in Table 2.

Comparative example 2
Paste PVC, paste PVC composition, and foam were obtained in the same manner as in Example 1, except that 600 ppm of erythorbic acid was added to the vinyl chloride resin instead of 50 ppm of erythorbic acid to the vinyl chloride resin. Ta.

The resulting paste vinyl chloride contained 700 ppm of erythorbic acid based on the vinyl chloride resin. Further, the obtained embossed foam had an expansion ratio of 3.2 times, a suppression ratio of 46%, and a hue of YI value of 23.6, and was inferior in foamability and chemical embossability. The evaluation results are shown in Table 2.

Comparative example 3
Paste PVC, paste PVC composition, and foam were obtained in the same manner as in Example 1, except that 800 ppm of erythorbic acid was added to the vinyl chloride resin instead of 50 ppm of erythorbic acid to the vinyl chloride resin. Ta.

The resulting paste vinyl chloride contained 900 ppm of erythorbic acid based on the vinyl chloride resin. In addition, the obtained embossed foam had an expansion ratio of 1.8 times, a suppression ratio of 14%, and a hue of YI value of 26.0, which was poor in foamability, chemical embossability, and hue. . The evaluation results are shown in Table 2.

The paste PVC of the present invention can provide a foam with a high expansion ratio, good chemical embossability, and excellent thermal stability, and has particularly excellent properties as a construction material such as wallpaper, flooring, and foam sheets. Therefore, its industrial utility value is high.

Claims (6)

A vinyl chloride resin for paste processing, which contains 150 to 500 ppm of a water-soluble organic acid based on the vinyl chloride resin, and the water-soluble organic acid is erythorbic acid and/or ascorbic acid . The vinyl chloride resin for paste processing according to claim 1, wherein the vinyl chloride resin has a degree of polymerization of 1000 to 1500. Paste processing according to claim 1 or 2, characterized in that erythorbic acid and/or ascorbic acid is added as a water-soluble organic acid to the vinyl chloride resin latex after the polymerization reaction of the vinyl chloride monomer, and spray drying is performed. Method for producing vinyl chloride resin for use. A vinyl chloride resin composition for paste processing, comprising 20 to 200 parts by weight of a plasticizer based on 100 parts by weight of the vinyl chloride resin for paste processing according to claim 1 or 2. The vinyl chloride resin composition for paste processing according to claim 4, further comprising 1 to 300 parts by weight of a filler and 0.1 to 30 parts by weight of a stabilizer. The vinyl chloride resin composition for paste processing according to claim 4 or 5, which is used for chemically embossed flooring.