JPS58206652A - Vinyl chloride-based resin film for agriculture - Google Patents

Abstract

PURPOSE:The titled film having improved water resistance, dustproof properties, obtained by adding a hindered amine-based compound having a specific structure to a vinyl chloride-based resin blended with a plasticizer, molding it into a film, forming an acrylic resin film on one side of the film. CONSTITUTION:A vinyl chloride-based resin blended with preferably 20- 60pts.wt. plasticizer (e.g., dioctyl phthalate, etc.) is mixed with preferably 0.02- 8pts.wt. hindered amine-based compound (e.g., 4-acetoxy-2,2,6,6-tetramethylpiperidine, etc.) shown by the formula (R1-R4 are 1-4C alkyl; n is 1-4; R is mono- tetraacyl derived from mono-- tetrafunctional carboxylic acid) based on 100pts.wt. resin, and molded into a film. An acrylic resin is dissolved in an organic solvent (e.g., methanol, etc.), and applied to one side or both sides of the film to form a film, so that the desired film is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an agricultural vinyl chloride resin film. More specifically, the present invention relates to an agricultural vinyl chloride resin film that has excellent daffodil and dust resistance, as well as flexibility and cold resistance.

In recent years, farmers who cultivate useful plants have widely adopted methods of promoting or suppressing cultivation of useful plants in greenhouses or tunnels for the purpose of increasing profitability.

This agricultural house or Tong-il cover ef phase and L'l
T, polyethylene film, ethylene-vinyl acetate copolymer film, polyester film, polycarbonate film, lactic acid vinyl resin film, glass, etc. are used.

Among them, vinyl chloride resin films, especially soft vinyl chloride resin films containing a large amount of plasticizer, have superior light transmittance, heat retention, mechanical strength, and durability compared to other synthetic resin films, glass, etc. It is widely used because it has the best overall performance, workability, economy, etc.

However, with soft vinyl chloride resin films, the blended plasticizer migrates to the film surface over time, making it easy for dust to adhere to the film, and the longer it is used, the more conspicuous the dirt on the film surface becomes, resulting in lower light transmittance. It has the disadvantage that it decreases.

As a way to improve the above drawbacks, the special public Shoq2-70AI
Although coatings for soft vinyl chloride resin products as described in the above publication have been proposed, it is difficult to completely prevent the plasticizer blended into the film from migrating to the film surface.

As another method to improve the above-mentioned drawbacks,
Specific acrylic resins as described in Publication No. 7'lO,
That is, hydroxyalkyl (meth)acrylate/S
-λ5it-t%, α, β-unμ4 summed monomer O, S ~
A method has been proposed in which a resin obtained by polymerizing a monomer mixture consisting of a 3-weight compound and other (meth)acrylic monomers is applied to one or both sides of a vinyl chloride resin film to form a film. ing. However, although the Ak)nol resin with the above composition can prevent the OJ' plasticizer from leaching onto the film surface, if it is exposed to rainwater outdoors, the formed film will gradually break down over time. As a result, the dustproof effect could not be maintained for a long period of time.

Under such circumstances, the present inventors aimed to provide an agricultural polyvinyl chloride film that has excellent water resistance f1 and dust resistance, and also has excellent flexibility, cold resistance, etc.
As a result of intensive study, the present invention has been completed.

However, the gist of the present invention is to apply a polyvinyl chloride resin containing a plasticizer to the general formula [in formula (1), R1
-R4 represents an alkyl group having from 1 to 3 carbon atoms, n is an integer from 7 to 2, and R represents a mono-tetraacyl group derived from a carboxylic acid having a carbon number of 7 to 3. ] A vinyl chloride resin film for agricultural use, characterized in that it is blended with a hindered amine compound represented by the formula and formed into a film, and an acrylic resin coating is formed on one or both sides of the film. exists in

The present invention will be explained in detail below.

In the present invention, the vinyl chloride resin includes not only polyvinyl chloride but also a copolymer containing vinyl chloride as a main component. Monomeric compounds copolymerizable with vinyl chloride include vinyl esters, vinyl ethers, acrylic acid or methacrylic acid and their esters, maleic acid or fumaric acid and their esters, maleic anhydride, aromatic Examples include group vinyl compounds, vinylidene compounds, acrylonitrile, ethylene, and propylene.

The vinyl chloride resin is blended with 20 to AO parts by weight of a plasticizer per 100 parts by weight of the resin. When the amount of the plasticizer is within the above range, the film will have excellent mechanical properties, flexibility, etc., which is preferable.

1. Examples of plasticizers that can be used include diocterphthalate,
Phthalate esters such as diptyl phthalate, butylbenzyl phthalate, dibenzyl phthalate, diisodecyl phthalate, didodecyl phthalate, diisodecyl phthalate; dioctyl adipate, di-n-adipate
Aliphatic dibasic acid esters such as butyl and dibutyl sepacate; glycol esters such as pentaerythritol ester and diethylene glycol dibenzoate; fatty acid esters such as methyl acetyl ricinoleate; tricresyl phosphate, )'J phenyl Phosphoric acid esters such as phosphates; Epoxidized oils such as epoxidized soybean oil and epoxidized linseed oil; Citric acid esters such as acetyl tributyl citrate, acetyl trioctyl citrate, and tri-n-butyl citrate; Trialkyl trimeri Examples include plasticizers with various structures such as tate, tetra-n-octylpyromellitate, polypropylene adipate, and other polyester-based plasticizers.

The base film of the agricultural polyvinyl chloride resin film according to the present invention further contains a general formula [(I) in which R1-R
4 is an alkyl group with carbon number/~q, n is an integer of /~q, R
represents a mono-tetraacyl group derived from a 7- to 9-valent carboxylic acid. ] A hindered amine compound represented by the following is blended.

Examples of the hindered amine compound represented by the above ME2 formula (1) include q-acetoxycetate, 2. Otsu, Otsu-Tetramethylpiperidine, Coustearoyl Oquine-λ, 2.
b, b-tetramethylpiperidine, l-acryloyloxy-, s, ot, ot-tetramethylpiperidine, q-
(phenylacetoxy)-2,,,2,Otsu,ro-tetramethylpiperidine,y-(phenoxyacetoxy)-
2,1, Otsu, Otsu-tetramethylpiperidine, Cucyclohexanoyloxy-λ, 2. A, A-tetramethylpiperidine, q-benzyloxy-2,2. Otsu, Otsu-
Tetramethylpiperidine, <=-(○-chlorobenzoyloxy)-2,2,/, O-tetramethylpiperidine
Zin, Ku(m-chlorobenzoyloxy)-λ,2
．． A, O-tetranautetramethylpiperidine-chlorobenzoyloxy)-,2,2,Otsu,6-titramethinoL-hi.

Helicin, y-(o-toluoyloxy)-no.

S, O, 6-titramethelpiberidine, &-(:/= cotinoyloxy-λ, λ, O, O-tetramethelhy.

Vericin, q-(2-furoyloxy)-1, λ.

O, O-tetramethylpiperidine, q-(β-naphthoyloxy)-, :Z, X, O, O-tetramethylh.

Veridine, bis(2,:l,b,6-titramethel=q
-piperisil)oxalate, bis(2,,2,Otsu,O-tetramethyl-q-piperidyl)malonate, bis(a, 2.Otsu, A-tetramethyl-kuhi°helicyl)adipate, bis(x, 2.t,j-tetramethyl-
Goupiperidyl) sepagate, bis(2,,2゜Otsu, Otsu-tetramethyl-cupiperidyl) fumarate, bis(
2,2,A,b-tetramethyl-gupiperidyl) hexahydrophthalate, bis(2゜co, Otsu, O-tetramethylda-piperidyl phthalate, tris(:l,,
2,A,O-tetramethyl-q-piperidyl)benzene-y,3,s-) IJ carboxylate, Tris(
, 2, , 2, Otsu, Otsu-tetramethyl-goupiperidyl)
triazine-2,'l, tritributylate, tris(x,r,tetranonal-9-piperidyl)nitrilotria, cetate, tris(,2,
2, Otsu, Otsu-tetramethyl-q-piperidyl)butane-
/,,2,3-tricarboxylate,tetrakis(
, 2, 2, Otsu, 6-titramethyl-goupiperidyl)
Propane-/,/,,2,3.

Tetracarboxylate, tetrakis(,!,λ,Otsu.

Otsu-tetramethyl-kuhi °veridyl) phytotan/,
2,3,'I-tetracarboxylate, tetrakis (
λ, 2, Otsu, Otsu - Tetrametheluguhi ° beridyl) Propane - /, /, 3.3 - Tetracarboxylate, Tetrakis ( , 2,, 2, Otsu, Otsu - Tetramethyl - Kuhi.

veridyl) ethene/ , / ,, ,, 2, ,
2-tetracarboxylate, tris(2,co,A,
A-tetramethyl-ta-hyperidyl)-coacetoxypropane-t,a,3-) recarboxylate, tris(co,2゜5A-tetramethyl-da-piperidyl)-
2-hydroxy-propy'-/, 2. ,? -) Ricarboxylate, etc.

The amount of the hindered amine compound added to the base film is 0.02 to 100 parts by weight of the vinyl chloride resin.
g parts by weight. When the blending amount is less than the above range, the water resistance and dust resistance of the agricultural vinyl chloride resin film cannot be sufficiently improved, which is not preferable.

On the other hand, if the amount exceeds the above range, the appearance of the vinyl chloride resin film will not be excellent, which is undesirable. Among the above ranges, o, i to 5 parts by weight are particularly preferred.

In addition to plasticizers and hindered amine compounds, vinyl chloride resins contain various usual resin additives, such as heat stabilizers, lubricants, antistatic agents, antifogging agents, ultraviolet absorbers, dyes and pigments, as necessary. etc. can be blended.

Heat stabilizers that can be used include metal soaps such as calcium stearate, zinc stearate, lead stearate, barium stearate, cadmium stearate, barium ricinoleate; tribasic lead sulfate, dibasic phosphorous acid. Examples include organic tin compounds such as lead, dibutyltin laurate, dibutyltin malate, di-n-octyltin mercaptide, and dimethyltin mercaptide.

Examples of lubricants that can be used include fatty acid lubricants such as stearic acid, palmitic acid, and mystylic acid; stearamide, palmitic acid amide, methylene bisstearamide,
Fatty acid amide lubricants such as ethylene bisstearamide;
Examples include ester lubricants such as butyl stearate and bunal palmitate, polyester wax, and liquid paraffin.

As antistatic agents or antifogging agents that can be used, sorbitan surfactants such as sorbitan monostearate, sorbitan monopalmitate, and sorbitan monobenzoate; glycerin monolaurate, diglycerin monopalmitate, glycerin monostearate, etc. Examples include glycerin-based surfactants; polyethylene glycol-based surfactants such as polyethylene glycol monostearate and polyethylene glycol monopalmitate; alkylene oxide adducts of alkylphenols; and esters of sorbitan/glycerin condensates and organic substances.

Usable UV absorbers include those classified as benzoate-based UV absorbers, benzophenone-based UV absorbers, benzotriacy-based UV absorbers, cyanoacrylate-based UV absorbers, phenylsalicylate-based UV absorbers, etc. can give.

These various resin additives can be selected in the usual amount, for example, within the range of S parts by weight or less per 100 parts by weight of the base vinyl chloride resin.

In order to blend plasticizers, hindered amine compounds, and various resin additives into the base vinyl chloride resin, conventional mixing and
Compounding techniques such as pump blenders, Banbury mixers, super mixers and other conventionally known blenders and mixers may be used.

The resin composition thus obtained can be formed into a film by a method known per se, such as melt extrusion method (T-
(including Gouy method and inflation method), solution casting method, and calendar molding method.

If the thickness of the film is too thin, the strength will be insufficient, which is undesirable.On the other hand, if it is too thick, the film forming process will be difficult.
Since it causes inconvenience during subsequent handling (including cutting, gluing, spreading work, etc.), it is preferable to use a range between 0.03 and θ, 3, preferably in the order of o, o s and 0.2. Good.

In the agricultural vinyl chloride resin film according to the present invention, an acrylic resin coating is formed on one or both sides of the base film.

In the present invention, acrylic resin refers to hydroxyalkyl (meth)acrylates S to q0 weight percent, α, β diunsaturated carboxylic acid compounds containing 7 or 2 or more carboxyl groups in the molecule 0 to 20% by weight, and It refers to a polymer obtained by copolymerizing these compounds with other copolymerizable vinyl compounds.

As hydroxyalkyl (meth)acrylates,
Hydroxymethyl acrylate, hydroxymethyl methacrylate, -monohydroxyethyl acrylate, -monohydroxyethyl methacrylate, co-hydroxyglopylacrylate, co-hydroxypropyl methacrylate, 3-hydroxypropyl acrylate, 3-hydroxypropyl acrylate, cohydro, xybutyl acrylate, co- hydroxybutel methacrylate,
Terhydroxybutyl acrylate, gouhydro, xybutyl methacrylate, co-hydroxypentyl acrylate, co-hydroxypentyl methacrylate, 6-
Examples include hydroxyhexyl acrylate), 4-hydroxyhexyl methacrylate, and the like.

These hydroxyalkyl (meth)acrylate compounds make it easier for the resulting acrylic resin to dissolve in organic solvents,
It is a component that greatly contributes to improving the adhesion between the acrylic resin and the base vinyl chloride resin film, and further suppressing the migration of the plasticizer that seeps out onto the film surface.

If the proportion of this hydroxyalkyl (meth)acrylate in the acrylic resin is less than the S weight ratio, the solubility with organic solvents, the adhesion with the base film, and the effect of suppressing plasticizer migration will be fully exhibited. It's not possible, so it's not a good idea.

On the other hand, if the amount is more than tio weight %, the cost increases and the effect obtained is not large compared to the increase in cost, which is not preferable.

Examples of α, β-unsaturated carboxylic acid compounds containing 7 or 2 or more carboxyl groups in the molecule include acrylic acid, methacrylic acid, itaconic acid, maleic acid, aconitic acid, chloro/acid, and α-methylene curthalic acid. Examples include acids. These compounds can be added to the hydroxyalkyl (meth)
When used in combination with acrylates, it improves the adhesion between the acrylic resin and the vinyl chloride resin film, and exhibits the effect of suppressing the tendency for films to adhere to each other (blocking). The amount of these compounds used is up to -0% by weight. If the film is kneaded, the property of the films adhering to each other when the film is moistened with water (blocking property when wet) is strengthened, which is not preferable.

Other vinyl compounds that can be copolymerized with the above compound include methyl acrylate, ethyl acrylate, n-propyl acrylate, l-propyl acrylate, n-butyl acrylate, 1-butyl acrylate, cyclohexyl acrylate, coetherhexyl acrylate, and decyl. Acrylate, dodecyl acrylate.

01-C2□ alkyl esters of acrylic acid such as tridecyl acrylate, stearyl acrylate, etc.; methyl methacrylate, ethyl methacrylate, n-
C3-C22 of methacrylic acids such as propyl methacrylate, i-propyl methacrylate, n-butyl methacrylate, i-butyl methacrylate, cyclohexyl methacrylate, coetherhexyl methacrylate, decyl methacrylate, dodecyl methacrylate, tridecyl methacrylate, stearyl methacrylate, etc.
Alkyl esters of; styrene, acrylonitrile,
Examples include tolyl methacrylate, vinyl acetate, vinyl propionate, acrylamide, methacrylamide, N-butoxyacryloamide, and N-butoxymethacryloamide.

The acrylic resin used to form a coating on one or both sides of a vinyl chloride resin film is prepared by combining a predetermined amount of the above-mentioned 1 resin and adding it to polymerization A7 together with an organic solvent, and adding a polymerization initiator and, if necessary, a molecular weight regulator. Add and heat while stirring to polymerize. In this case, the polymerization initiator that can be used is:

Examples include radical-generating catalysts such as α,α-azobisisobutyronitrile, benzoyl peroxide, and cumene hydroperoxide, and examples of molecular weight regulators include butyl mercaptan, n-dodecyl mercaptan, tert-dodecyl mercaptan, and β-mercaptoethanol. etc. can be mentioned.

The acrylic resin coating formed on one or both sides of the vinyl chloride resin film is preferably applied by dissolving the acrylic resin in an organic solvent.

The organic-PfA used to dissolve the acrylic resin may be the same as the solvent used in the production of the acrylic resin. Specifically, alcohols are preferred, such as methanol, ethanol, n-propanol, isopropanol, n-butanol, s'ec-butanol,
Examples include tart-butanol, n-amyl alcohol, isoamyl alcohol, tert-7yl alcohol, n-hexyl alcohol, and cyclohexanol.

In addition to the above alcohols, ethyl acetate, methyl ethyl ketone, tetrahydrofuran, hexane, toluene, xylene, chloroform, etc. can also be used.

To form the acrylic resin coating on one or both sides of a vinyl chloride resin film, dissolve acrylic resin in the organic solvent and apply a spray coating method, roll coating method, gravure coating method, or reverse coating method. , dip coating method, etc., as well as screen printing method, flexo printing method, etc.; Coating by various known coating methods,
It is best to dry it. Examples of drying methods that can be used include hot air drying, infrared drying, and far infrared drying. The drying temperature is 1 to 1 to scatter the organic solvent, that is, to 4 to dissolve the acrylic resin.
(7) 'It is better to set it to the In point or higher.

Drying (the shorter the φ time, the better. Therefore, it is better to dry at a temperature higher than the boiling point of the organic solvent and in as short a time as possible.

The thickness of the broken acrylic resin film formed on the surface of the base film is preferably 1/10 or less of the thickness of the base film. The thickness of the film is 1/10 of the thickness of the base film
If it is larger, there is a difference in flexibility between the base film and the coating, so phenomena such as peeling of the coating from the base film are likely to occur, and cracks may occur in the coating, causing the base film 1
, a phenomenon occurs in which the strength of the steel is reduced, which is not a problem.

When actually using the agricultural vinyl chloride resin film according to the present invention (J), when the film is formed only on one side j'', the side on which this skin tFJ is provided is placed in a house or tunnel. Expand it so that it becomes I11 outside of .

The agricultural vinyl chloride resin film according to the present invention is as described above, and has the following particularly remarkable effects, and its utility value in the L industry is extremely large.

(1) In the agricultural vinyl chloride resin film according to the present invention, the hindered amine compound represented by the formula (1) is blended in the base film 1, and an acrylic resin film of a specific composition is formed on the surface of the base film. Therefore, the water resistance of acrylic resin is extremely excellent. Therefore, the film according to the present invention can be extended outdoors for a long period of time without the film being washed away with water.

(2) The agricultural vinyl chloride resin film according to the present invention further includes a hindered amine represented by the formula 1ill) which is blended into the base film, and an acrylic resin coating having a specific composition formed on the film surface. Combined with this, it is possible to suppress the oozing out of the plasticizer blended into the film. Therefore, the surface will not get dirty for a long time,
The film exhibits excellent light transmission over a long period of time,
Suitable for covering agricultural greenhouses.

(3) Since the agricultural vinyl chloride resin film according to the present invention has an acrylic resin film with a specific composition formed on its surface, it has excellent adhesion between the base film and the broken film, and this film is extremely Coupled with its thinness, the coating is difficult to peel off.

(1) In the agricultural vinyl chloride resin film according to the present invention, the acrylic resin coating formed on the surface itself has excellent weather resistance, and in addition, the base film has the above formula (1). Since the hindered amine compound shown above is added, the weather resistance of the film is -1 on one end.

Hereinafter, the present invention will be explained in detail based on examples, but the present invention is not limited to the following examples unless it exceeds the gist thereof.

Examples/~B, Comparative Examples/~Q (1) Preparation of base film Polyvinyl chloride<p=ytaoo)...100
Part by weight Dioctyl phthalate ・・・・・・・・・・・・
...SO〃tricresyl phosphate...
......S Epoxidized soybean oil...
・・・・・・・・・・・・・・・・ 〃Barium-zinc complex liquid stabilizer ・・・／、5 〃Barium stearate ・・・・・・・・・・・・・・・・・・
0.2〃Zinc stearate・・・・・・・・・・・・
・・・・・・・・・ 0,41 y Sorbitan monostearate ・・・・・・・・・ /, S A resin composition was prepared, and a hindered amine of the type and amount shown in Table 1 was added. 2 in which the based compound was blended, however, in the case of Comparative Examples/--3, the bone was not blended.

Each formulation was stirred and mixed in a super mixer for 70 minutes and then kneaded in a mill roll heated to /gOC to prepare a base film with a thickness of 0.7 mm.

(2) Forming a film In the polymerization tank, add 750 parts by weight of isopropyl alcohol and acrylic compounds in the types and amounts shown in Table 1, and further add heavy parts of benzyi and rhubarb oxide O and S.
Polymerization reaction was carried out at goC for 10 hours under a nitrogen gas stream.

Isopropyl alcohol was added to each of the obtained polymer solutions to adjust the solid content in the solution to 2° by weight.

Each polymer solution was applied to one side of the base film by a gravure coating method, and allowed to stay in a hot air dryer at /3θC for 7 minutes to scatter the solvent and form a 2 micron thick film. did.

(3) Film evaluation (a) Water resistance test Each film was cut into pieces of 14 CmX, t Crn and immersed in a constant temperature water bath kept at 50C.
After 1 hour and 2 hours, the film was taken out and dried, and the appearance of the film was visually observed and evaluated. Results first
Shown in the table.

The evaluation criteria are as follows.

◎: No change in coating appearance observed at all.

○: No whitening observed in part of the coating.

△: Whitening was observed on the entire surface of the coating.

×: Whitening is not observed on the entire surface of the film, but peeling of the film is observed partially.

(b) Dust-proofing test Each film was tested in a pipe house (frontage 3m, depth SM, ridge height Hqm, roof slope 300) installed in a test field in Shigun, Mie Prefecture, with the surface coated with acrylic resin coated.・Extend it so that it is on the outside of the mouth. Each stretched film was collected at the same time after 6 months, 72 months, and 1 g month after the start of stretching, and the light transmittance at a wavelength of sss millimicrons was measured (rupture produced by Hitachi, Spectroscopy) using an EPS-λυ type spectrophotometer). The results are shown in the first column.

The measurement results were displayed as follows.

◎: Transmittance is go% or more.

○: Transmittance within the range of A5 to 79.

Δ: Transmittance within the range of G5 to A'l.

×: Transmittance is less than qS coefficient.

1 → Flexible 1-ite test each film, width 51? m, length/3 cm, and folded back alternately at 2 cm intervals in a direction perpendicular to the long direction. In this state, apply a load of 2 ky from above, /
It was left in a constant temperature bath maintained at SC for J+ hours. Then, the load was removed, the folds of the film were stretched, and the appearance of the film was observed with the naked eye. The results are shown in Table 1.

The evaluation criteria for this test were as follows.

○: No change at all observed in the crease area.

△: Slight cracks are observed in the film at the creases.

×: Significant cracks were observed in the film at the creases.

(Note) *1x-HEMA means co-hydroxy ether methacrylate.

*22-HPA means -monohydroxyglobyl acrylate.

*3A-a means acrylic acid.

*4I-EL means itaconic acid.

*5MMA means methyl methacrylate.

*6n-BA means n-butyl acrylate.

From Table 1, the following becomes clear.

(1) The agricultural vinyl chloride resin film according to the present invention has extremely excellent water resistance because the coating formed on its surface is an acrylic resin of a specific composition.

(2) The agricultural vinyl chloride resin film according to the present invention has a coating made of acrylic resin with a specific composition formed on its surface, so that the plasticizer blended in the film can be prevented from seeping out. Even if it is deployed outdoors for a long time, there is little surface contamination and the decrease in light transmittance is small.

(3) Since the agricultural vinyl chloride resin film according to the present invention uses an acrylic resin with a specific composition as the coating formed on its surface, the coating has excellent flexibility, is resistant to cracking, and is resistant to whitening. .

Applicant Mitsubishi Monsanto Kasei Co., Ltd. Agent
Person Patent Attorney Hase - (7 others)

Claims (1)

[Claims] (1) Vinyl chloride bamboo 1 fat mixed with a plasticizer,
General formula [(I) in the formula, R1 to R4 are alkyl groups having carbon number/~q,
n is a number of / to q':·1, and R represents a mono-tetraacyl group derived from a 7- to 9-valent carboxylic acid. ] A hindered amine compound represented by is blended and formed into a film, and one or both sides of this film are coated with
Agricultural vinyl chloride resin film 4, characterized in that an acrylic resin film is formed over and over again. A polymer obtained by copolymerizing an α,β-unsaturated carbonic acid compound θ~20% by weight containing 7 or 2 or more carboxyl groups and another vinyl compound copolymerizable with a konerate compound. A four-layer vinyl resin film for agricultural use according to claim (1), which is a composite film. (3) The amount of the hindered amine compound blended in the vinyl chloride resin film is 10% of the vinyl chloride resin film.
The agricultural vinyl chloride resin film according to claims (1) to (2), characterized in that it has a content of 0.0 λ to 0 g parts by weight. (1) Agricultural chloride according to claims (1) to (3), wherein the substituents R1 to R4 of the compound represented by general formula (1) are methyl groups. Vinyl resin film.