JPH09208775A - Vinyl chloride resin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a vinyl chloride resin composition having a performance capable of intercepting or attenuating far IR rays in high efficiency, and further to obtain a vinyl chloride resin composition having the performance capable of intercepting and attenuating the far IR rays in high efficiency and a performance for absorbing specific visible light. SOLUTION: This vinyl chloride resin composition comprises 100 pts.wt. of a vinyl chloride resin, 0.01-10 pts.wt. of at least one kind of infrared light absorbent selected from the below absorbents (a) and (b), and 10-200 pts.wt. of a plasticizer. (a) Metal tons comprising cupric ions, and (b) a particulate metal oxide comprising indium oxide and/or tin oxide. When the absorbent (a) is contained as the infrared absorbent, a phosphate group-containing compound comprising a phosphate ester or a phosphonate ester is preferably added.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vinyl chloride resin composition, and more particularly to a vinyl chloride resin composition having excellent near-infrared absorptivity and particularly suitable as a covering material for agriculture.

[0002]

2. Description of the Related Art Conventionally, as an agricultural coating material for constructing a greenhouse facility covering a plant cultivation atmosphere, soft vinyl chloride, a soft coating material mainly containing a fluororesin, or glass or a hard vinyl chloride plate. Hard coating materials such as However, since these coating materials are not particularly considered for their ability to selectively absorb or transmit light rays in a specific wavelength range, a greenhouse facility using these coating materials may have a problem during the summer period. The temperature in the facility rises considerably. For this reason, it has been pointed out that the greenhouse facility cannot be used to grow agricultural products, especially agricultural products that dislike high temperatures, during the summer season.

[0003]

SUMMARY OF THE INVENTION The present invention has been made under these circumstances, and a vinyl chloride resin is allowed to contain a specific infrared absorbing material, whereby light rays in the near infrared region are obtained. It has been achieved based on this finding that a resin composition having an optical property of selectively absorbing a resin with high efficiency can be obtained.

An object of the present invention is to provide a vinyl chloride resin composition having a property of blocking or attenuating light rays in the near infrared region with high efficiency. Another object of the present invention is to provide a vinyl chloride resin composition having a property of blocking or attenuating light in the near infrared region with high efficiency, and having a property of absorbing light in the wavelength range of 500 to 600 m. It is in.

[0005]

The vinyl chloride resin composition of the present invention is based on 100 parts by mass of the vinyl chloride resin.
0.01-10 parts by mass of at least one infrared absorber selected from the following (a) and (b), and a plasticizer 10:
And 200 parts by mass are contained. (A) Metal ion composed of divalent copper ion (b) Particulate metal oxide composed of indium oxide and / or tin oxide

In the vinyl chloride resin composition of the present invention, when a metal ion composed of a divalent copper ion is contained as an infrared absorbing agent, a phosphoric acid group-containing compound composed of a phosphoric acid ester or a phosphonic acid ester. Is preferably contained. The phosphoric acid group-containing compound is preferably a phosphoric acid ester represented by the following formula (1) or a phosphonic acid ester represented by the following formula (2).

[0007]

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[0008]

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In the vinyl chloride resin composition of the present invention, a wavelength of 50 is added to 100 parts by weight of the vinyl chloride resin.
It is preferable that 0.01 to 10 parts by mass of a specific visible light absorber that absorbs visible light of 0 to 600 nm is contained. Further, the specific visible light absorber is preferably a metal ion composed of a divalent cobalt ion.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the vinyl chloride resin composition of the present invention will be described in detail. The vinyl chloride resin composition of the present invention comprises a vinyl chloride resin containing a specific infrared absorber and a plasticizer.

[Vinyl Chloride Resin] In the present invention, as the vinyl chloride resin, a vinyl chloride resin or a copolymer of vinyl chloride and a monomer copolymerizable therewith can be used.

Monomers copolymerizable with vinyl chloride (hereinafter referred to as
Also referred to as "copolymerizable monomer". Examples of) include vinyl bromide, vinylidene chloride, vinyl acetate, acrylic acid, methacrylic acid, acrylic acid ester, methacrylic acid ester, ethylene, propylene, vinyl ethers, acrylonitrile, maleimides, and methacrylamide. The proportion of the copolymerizable monomer used is preferably 30% by mass or less based on the total amount of the monomers.

As the vinyl chloride resin, one having a degree of polymerization of usually 500 to 3000 is used, and particularly,
From the viewpoint of moldability and performance of the resulting composition, 600 to 2
Those of 500 are preferably used. It is also possible to mix and use polymers having different degrees of polymerization.

[Infrared Absorber] The vinyl chloride resin composition of the present invention contains at least one infrared absorber selected from the following (a) and (b). (A) Metal ions composed of divalent copper ions (hereinafter, also referred to as "infrared absorber a"). (B) Indium oxide and / or tin oxide particulate metal oxide (hereinafter, "infrared absorber b"). Also called.)

(1) Infrared absorbing agent a: The metal ion composed of divalent copper ions used as the infrared absorbing agent a is
It is obtained from a metal compound composed of an appropriate copper compound. Specific examples of the copper compound, copper acetate, copper chloride, copper formate, copper stearate, copper benzoate, copper ethyl acetoacetate, copper pyrophosphate, copper naphthenate, copper citrate anhydrides or hydrates and the like. Is mentioned.

When a metal ion composed of a divalent copper ion is used as the infrared absorber, a phosphoric acid group composed of a phosphoric acid ester or a phosphonic acid ester is added to vinyl chloride in order to enhance the dispersibility of the metal ion. It is preferable to include the containing compound together. In the present invention,
"Phosphate group" means PO (OH) _n- (n is 1 or 2
It is. ) Refers to a group represented by. As such a phosphoric acid group-containing compound, a phosphoric acid ester represented by the above formula (1) (hereinafter, also referred to as “specific phosphoric acid ester”) or a phosphonic acid ester represented by the above formula (2). (Hereinafter, also referred to as “specific phosphonate ester”) is preferably used.

Specific examples of the specific phosphoric acid ester include:
Monomethyl phosphate, dimethyl phosphate,
Monoethyl phosphate, diethyl phosphate,
Monoisopropyl phosphate, diisopropyl phosphate, mono n-butyl phosphate, di n-butyl phosphate, monobutoxyethyl phosphate, dibutoxyethyl phosphate, mono (2-ethylhexyl) phosphate, di (2-ethylhexyl) Phosphate, mono n-decyl phosphate,
Examples include di-n-decyl phosphate, monoisodecyl phosphate, diisodecyl phosphate, monooleyl phosphate, dioleyl phosphate, monoisostearyl phosphate, diisostearyl phosphate, monophenyl phosphate, diphenyl phosphate. To be

Further, as the specific phosphoric acid ester, as shown by the above formula (1), as the substituent R ¹ , an acryloyl group (when X is a hydrogen atom) or a methacryloyl group (where X is a hydrogen atom) to which an ethylene oxide group is bonded. A compound having a polymerizable functional group consisting of (when X is a methyl group) can be used. Here, the repeating number m of the ethylene oxide group is an integer of 0 to 5. When the value of m exceeds 5, the compatibility with the vinyl chloride resin becomes low, so that the transparency of the obtained vinyl chloride resin composition is lowered and the light transmittance at the required wavelength is reduced. It is not preferable because it becomes smaller.

Specific examples of the specific phosphoric acid ester having such a polymerizable functional group include 2-acryloxyethyl acid phosphate, 2-methacryloxyethyl acid phosphate, and bis (2-methacryloxyethyl). Acid phosphate) and the like.

Specific examples of the specific phosphonate ester include monomethylmethylphosphonate, monoethylethylphosphonate, monobutylbutylphosphonate,
Examples include mono (2-ethylhexyl) 2-ethylhexylphosphonate.

Among them, the group R ¹ in the above formula (1) or the group R ² and the group R ³ in the above formula (2).
Is a 2-ethylhexyl group, specifically,
Mono (2-ethylhexyl) phosphate, di (2-ethylhexyl) phosphate, or mono (2-ethylhexyl) 2-ethylhexylphosphonate has excellent compatibility with a vinyl chloride resin and is a vinyl chloride-based infrared absorbing agent a. It is preferable in that the dispersibility in the resin can be enhanced.

When the infrared absorbent a is contained in the vinyl chloride resin, the use ratio of the infrared absorbent a is 0.01 to 10 parts by mass, preferably 0 parts by mass with respect to 100 parts by mass of the vinyl chloride resin. 1 to 10 parts by mass. When this ratio is less than 0.01 parts by mass, the performance of absorbing infrared rays is hardly obtained. On the other hand, if this proportion exceeds 10 parts by mass, it will be difficult to disperse it uniformly in the vinyl chloride resin.

The phosphoric acid group-containing compound is preferably used in a ratio of 1 to 10 mol per 1 mol of metal ion composed of divalent copper ion.
It is possible to sufficiently disperse metal ions composed of valent copper ions in the vinyl chloride resin.

(2) Infrared absorber b: Infrared absorber b
Is a particulate metal oxide composed of either or both of indium oxide and tin oxide (hereinafter, also referred to as “specific particulate metal oxide”). When a specific particulate metal oxide containing indium oxide as a main component is used, some of the indium atoms in indium oxide are replaced with tin atoms, and further oxygen defects are introduced, resulting in carriers in indium oxide. A composite oxide of indium oxide and tin oxide with an increased electron density (hereinafter referred to as “ITO” (Indium Tin Oxi).
Also called de). ) Is preferable. Further, in the case of using a specific particulate metal oxide containing tin oxide as a main component, a part of tin atoms in the tin oxide is replaced with an antimony atom, and oxygen defects are introduced to the tin oxide. A composite oxide of tin oxide and antimony oxide (hereinafter, "AT
Also referred to as "O" (Antimony Tin Oxide). ) Is preferable.

Compared with indium oxide alone or tin oxide alone, the above ITO or ATO causes reflection of light rays in the near-infrared region from the region on the lower wavelength side, so that the wavelength is longer than 1200 nm. It seems that the transmittance of light in the wavelength range is further reduced.

As such a specific particulate metal oxide, ultrafine particulate powder having a maximum particle size of 0.1 μm or less and a particle size distribution of 0.001 to 0.05 μm is preferable. . When the maximum particle size of the specific particulate metal oxide exceeds 0.1 μm, the light transmittance in the visible light region is reduced, and a vinyl chloride resin composition having excellent transparency cannot be obtained. On the other hand, in the case of containing a specific particulate metal oxide having a particle size of less than 0.001 μm, the fine particles are likely to aggregate, and the particulate metal oxide is uniformly dispersed in the vinyl chloride resin. Is difficult, and it is also very difficult to produce the particulate metal oxide itself.

When the infrared absorbing agent b is used, the content of the infrared absorbing agent b is preferably as large as possible within the range where the transparency and mechanical properties of the vinyl chloride resin composition are not impaired. 0.01 to 10 parts by mass, preferably 0.1 to 10 parts by mass with respect to 100 parts by mass of the vinyl chloride resin.
Parts by mass.

In the vinyl chloride resin composition of the present invention, the above infrared absorber a and infrared absorber b may be used alone or in combination. When both the infrared absorbing agent a and the infrared absorbing agent b are used, the ratio of each of the infrared absorbing agent a and the infrared absorbing agent b is within the above-mentioned range, and the total amount of both is a vinyl chloride type. It is used in a ratio of 0.01 to 20 parts by mass with respect to 100 parts by mass of the resin.

(3) Infrared absorber c: In the present invention, an infrared absorber c composed of a phenylenediamine derivative represented by the following formula (3) is used together with the above infrared absorber a or infrared absorber b. be able to.

[0030]

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[In the above formula (3), R is a hydrogen atom or an alkyl group having 1 to 12 carbon atoms, X is SbF ₆ ,
ClO ₄ , PF ₆ , BF ₆ , NO ₃ or a halogen atom is shown, and n is 1 or 2. ]

Such a phenylenediamine derivative is
Wavelengths of 760 to 760 without impairing the light transmittance in the visible light range
It has a feature that it can efficiently absorb an infrared ray of 1500 nm.

Specific examples of the phenylenediamine derivative include N, N, N ', N'-tetrakis (p-di-n).
-Butylaminophenyl) -p-benzoquinone-bis (immonium perchlorate), N, N, N ', N'-tetrakis (p-diethylaminophenyl) -p-benzoquinone-bis (immonium hexafluoroantimonate) Salt), N, N, N ', N'-tetrakis (p-di-n
-Hexylaminophenyl) -p-benzoquinone-bis (immonium fluoroborate), N, N, N ',
N'-tetrakis (p-di-isopropylaminophenyl) -p-benzoquinone-bis (immonium nitrate), N, N, N ', N'-tetrakis (p-di-n-)
Octylaminophenyl) -p-benzoquinone-bis (immonium hexafluoroantimonate), N,
N, N ', N'-Tetrakis (p-diethylaminophenyl) -p-benzoquinone-bis (immonium bromine salt), N, N, N', N'-tetrakis (p-di-n-
Butylaminophenyl) -p-phenylenediaminium perchlorate, N, N, N ', N'-tetrakis (p-
Dimethylaminophenyl) -p-phenylenediaminium chloride salt, N, N, N ', N'-tetrakis (p-di-n-dodecylaminophenyl) -p-phenylenediaminium hexafluoroantimonate, N , N,
N ', N'-Tetrakis (p-diethylaminophenyl) -p-phenylenediaminium fluoroborate, N, N, N', N'-tetrakis (p-di-n-butylaminophenyl) -p -Phenylenediaminium fluorine salt, N, N, N ', N'-tetrakis (p-diethylaminophenyl) -p-phenylenediaminium perchlorate, and the like.

The proportion of such infrared absorber c used is
It is preferably 0.01 to 1 part by mass, and particularly preferably 0.01 to 0.7 part by mass, relative to 100 parts by mass of the vinyl chloride resin. If this ratio is less than 0.01 parts by mass, the effect of improving the infrared absorption by adding the infrared absorber c cannot be sufficiently obtained, while this ratio is 1
When it exceeds the mass part, the decrease of the light transmittance in the visible light region becomes large, which is not preferable.

[Plasticizer] The vinyl chloride resin composition of the present invention contains a plasticizer compatible with the vinyl chloride resin, and thereby imparts plasticity. As such a plasticizer, various plasticizers widely used in the field of soft vinyl chloride resin products can be used.

Specific examples of the plasticizer include phosphoric acid ester plasticizers such as tricresyl phosphate and triphenyl phosphate, phthalic acid plasticizers such as dioctyl phthalate and dibutyl phthalate, dibutyl sebacate, butyl ricinoleate and methyl. Fatty acid-based plasticizers such as acetyl ricinolate and butyl succinate, glycol-based plasticizers such as butylphthalyl butyl glycolate, triethylene glycol dibutyrate, triethylene glycol di-2-ethylbutyrate, and polyethylene glycol. .
The infrared absorbing agent used in the present invention does not impair the infrared absorbing action even by the presence of these plasticizers.

The proportion of such a plasticizer used is 10 to 200 parts by weight, preferably 10 to 100 parts by weight, per 100 parts by weight of the vinyl chloride resin. When this ratio is less than 10 parts by mass, sufficient flexibility cannot be imparted to the resulting composition, while when this ratio exceeds 200 parts by mass, flexibility of the resulting composition is obtained. Becomes too large, and various performances such as mechanical performance and weather resistance become insufficient.

[Visible Light Absorber] The vinyl chloride resin composition of the present invention preferably contains a specific visible light absorber which absorbs visible light having a wavelength of 500 to 600 nm. As such a specific visible light absorber, a metal ion composed of a divalent cobalt ion can be used.

The metal ion composed of a divalent cobalt ion used in the specific visible light absorber is obtained from a metal compound composed of an appropriate cobalt compound. Specific examples of the cobalt compound include cobalt acetate, cobalt formate, cobalt benzoate, cobalt naphthenate, cobalt bromide, cobalt chloride, cobalt nitrate, cobalt sulfate, and anhydrous or hydrated cobalt diammonium sulfate. To be

When a metal ion composed of a divalent cobalt ion is used as the specific visible light absorber, a phosphorus ester consisting of a phosphoric acid ester or a phosphonic acid ester is contained in the vinyl chloride resin as in the infrared absorbent a. It is preferable to add the acid group-containing compound in a ratio of 1 to 10 mol per 1 mol of the metal ion. Examples of the phosphoric acid group-containing compound include the specific phosphoric acid ester or the specific phosphonic acid ester exemplified as the phosphoric acid group-containing compound used in the infrared absorber a described above.

As the phosphoric acid group-containing compound, the group R ¹ in the above formula (1) or the group R ^{1 in the} above formula (2) is used.
² and a compound in which the group R ³ is a 2-ethylhexyl group,
Specifically, mono (2-ethylhexyl) phosphate or di (2-ethylhexyl) phosphate,
Alternatively, mono (2-ethylhexyl) 2-ethylhexylphosphonate has excellent compatibility with vinyl chloride resin,
It is particularly preferable in that the dispersibility of metal ions composed of divalent cobalt ions in the vinyl chloride resin can be enhanced.

The proportion of the specific visible light absorber used is 0.01 to 100 parts by mass of the vinyl chloride resin.
The amount is 10 parts by mass, preferably 0.1 to 10 parts by mass. When this ratio is less than 0.01 part by mass, the wavelength is 500 to
Almost no ability to absorb visible light of 600 nm is obtained. On the other hand, when this ratio exceeds 10 parts by mass, it becomes difficult to uniformly disperse the metal ions in the vinyl chloride-based resin, and the visible light of 500 to 600 nm is selectively absorbed, and at other wavelengths. It becomes difficult to sufficiently transmit visible light in the region.

The phosphoric acid group-containing compound is used together with the above infrared absorber a and the specific visible light absorber, but the total amount thereof is 200 parts by mass or less, particularly 100 parts by mass of the vinyl chloride resin. It is preferably 100 parts by mass or less. If this proportion exceeds 200 parts by mass, the molding processability of the vinyl chloride resin composition obtained may deteriorate, and it may be difficult to obtain a molded product.

As described above, in the present invention, in addition to the metal ion composed of the divalent copper ion used as the infrared absorber, the metal ion composed of the divalent cobalt ion is used as the specific visible light absorber. However, in addition to these metal ions, ions of other metals may be contained as long as the object of the present invention is not impaired.
Ions of such other metals include sodium ion, potassium ion, iron ion, manganese ion,
Magnesium ions, nickel ions, tungsten ions and the like can be mentioned. Ions derived from other metals are obtained from an appropriate metal compound like divalent copper ions or divalent cobalt ions. By using the ions of such another metal, the light absorption characteristics corresponding to the ions of the other metal can be obtained.

Further, in the present invention, wavelengths of 500 to 6 are used.
As a visible light absorber that selectively absorbs visible light of 00 nm, a compound having a pyrazine ring, a perylene dye,
Anthraquinone dyes, naphthoquinone dyes, aminium dyes or pigments such as metal complexes such as phthalocyanine,
Dyes or organic pigments can be used. These dyes and compounds can be used in a proportion of 0.01 to 5 parts by mass with respect to 100 parts by mass of the vinyl chloride resin.

Further, the vinyl chloride resin composition of the present invention includes various compounds used in the vinyl chloride resin composition, for example, various stabilizers, lubricants, ultraviolet absorbers, antioxidants, and impact resistance enhancers. , A processability improver and the like can be used if necessary. When a compound having a polymerizable functional group is used as the phosphate ester, an organic peroxide or a photopolymerization initiator can be used as the polymerization initiator.

The vinyl chloride resin composition of the present invention is prepared by mixing the above-mentioned vinyl chloride resin, infrared absorber, plasticizer and, if necessary, a specific visible light absorber or other additives by a known method. Alternatively, it can be obtained by kneading. Specifically, by mixing with a high-speed stirrer such as a Henschel mixer, or by further melt-kneading and granulating this mixture using a roll kneader or a kneading extruder, powder or pellets are obtained. A composition of the form is obtained.

The powdery or pelletized vinyl chloride resin composition thus obtained is a melt extrusion molding method, a calender molding method, an injection molding method or the like which is widely used as a molding processing method for a thermoplastic resin. Are molded into various shapes for use. In particular, the sheet or film obtained by molding the composition of the present invention has a property of blocking or attenuating light rays in the wavelength region of the near infrared region with high efficiency, as is clear from the examples described later. When a specific visible light absorber is contained, the wavelength is 500 to 600 n.
It has the ability to absorb m rays. Therefore,
INDUSTRIAL APPLICABILITY The vinyl chloride resin composition of the present invention is useful for applications in which it is required to prevent irradiation of heat rays, for example, an agricultural coating material for covering a plant cultivation atmosphere to construct a greenhouse facility. By using it as a material for the above, it is possible to suppress the temperature rise in the facility during the summer period, and it is possible to extend the utilization period of the greenhouse facility.

The present invention will be described below with reference to examples, but the present invention is not limited to these examples. In the following, "part" means "part by mass".

Example 1 Vinyl chloride resin having an average degree of polymerization of 1300 (Kureha Chemical Industry Co., Ltd .: PVCS-9)
03) 100 parts, ATO ultrafine particle powder (manufactured by Sumitomo Cement) 2.5 parts, cobalt acetate tetrahydrate 5.8 parts (cobalt ion content to 100 parts vinyl chloride resin is 1.4 parts) And 19.2 parts of di (2-ethylhexyl) phosphate, and a plasticizer dioctyl phthalate (hereinafter,
It is called "DOP". ) 25 parts, and a barium / zinc composite stabilizer (Katsuda Kako: BZ-350M / PSE-102).
0B = 1.5 / 1.0 parts) 2.5 parts, epoxidized soybean oil 4.0 parts, and bisamide 0.3 parts are charged into a Henschel mixer so that the powder temperature becomes 110 ° C. A vinyl chloride resin composition was prepared by stirring and mixing in a heated state. The vinyl chloride resin composition was molded into a film having a thickness of 100 μm using a calendar molding machine. The light transmittance of the obtained film-shaped molded product was measured using a spectrophotometer. The results are shown in Table 1.

Example 2 In place of the ATO ultrafine particle powder, 4.4 parts of copper acetate (content of copper ion to 100 parts of vinyl chloride resin was 1.5 parts) was used, and di (2
-Ethylhexyl) phosphate was further added, except that the amount of plasticizer DOP was changed to 10 parts.
A vinyl chloride resin composition was prepared in the same manner as in Example 1, and the vinyl chloride resin composition was formed into a film. The light transmittance of the obtained film-shaped molded product was measured in Example 1
The measurement was performed in the same manner as described above. The results are shown in Table 1.

Example 3 A vinyl chloride resin composition was prepared in the same manner as in Example 1 except that 2.5 parts of ITO ultrafine particle powder (manufactured by Mitsubishi Materials) was used instead of the ATO ultrafine particle powder. The vinyl chloride resin composition was molded into a film. The light transmittance of the obtained film-shaped molded product was measured in the same manner as in Example 1. Table 1 shows the results
Shown in

Example 4 The same procedure as in Example 1 was repeated except that cobalt acetate tetrahydrate and di (2-ethylhexyl) phosphate were not used, and the amount of the plasticizer dioctyl phthalate was changed to 50 parts. A vinyl chloride resin composition was prepared, and this vinyl chloride resin composition was formed into a film. The light transmittance of the obtained film-shaped molded product was measured in the same manner as in Example 1. The results are shown in Table 1.

Example 5 Vinyl chloride resin having an average degree of polymerization of 1300 (Kureha Chemical Industry Co., Ltd .: PVCS-9)
03) 100 parts, ATO ultrafine powder (manufactured by Sumitomo Cement) 2.5 parts, infrared absorber (Nihon Kayaku: IRG-022) 0.1 part consisting of phenylenediamine derivative, and plasticizer DOP 50 parts And a barium / zinc composite stabilizer (Katsuda Kako: BZ-350M / PSE-1020B
= 1.5 / 1.0 part) 2.5 parts, epoxidized soybean oil 4.0 parts, and bisamide 0.3 part, in the same manner as in Example 1 to prepare a vinyl chloride resin composition. This vinyl chloride resin composition was prepared and molded into a film having a thickness of 100 μm. The light transmittance of the obtained film-shaped molded product was measured using a spectrophotometer. The results are shown in Table 1.

Comparative Example In Example 1, except that the ATO ultrafine particle powder, cobalt acetate tetrahydrate and di (2-ethylhexyl) phosphate were not used, and the amount of the plasticizer DOP was changed to 50 parts. In the same manner, a vinyl chloride resin composition was prepared, and this vinyl chloride resin composition was formed into a film having a thickness of 100 μm. The light transmittance of the obtained film-shaped molded product was measured using a spectrophotometer. The results are shown in Table 1.

[0056]

[Table 1]

As is apparent from Table 1, the film-shaped molded products obtained from the compositions of Examples 1 to 5 had a wavelength of 120.
It was confirmed that the near infrared rays of 0 nm or more are blocked or attenuated with high efficiency. In particular, it was confirmed that the compositions according to Examples 1 to 3 containing the specific visible light absorber selectively absorb visible light having a wavelength of 500 to 600 nm.

[0058]

INDUSTRIAL APPLICABILITY The vinyl chloride resin composition of the present invention has a property of blocking or attenuating near-infrared rays, particularly light rays in a wavelength range longer than 1200 nm, with high efficiency, and it is required to prevent irradiation of heat rays. It is useful for application to various uses, and in particular, by containing a specific visible light absorber, the ability to selectively absorb visible light having a wavelength of 500 to 600 nm is imparted. By using it as a material for an agricultural covering material for covering and constructing a greenhouse facility, it is possible to suppress an increase in temperature in the facility during the summer period, and it is possible to extend the utilization period of the greenhouse facility.

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Claims (5)

[Claims] 1. A plasticizer 1 and 0.01 to 10 parts by mass of at least one infrared absorber selected from the following (a) and (b) per 100 parts by mass of a vinyl chloride resin.
A vinyl chloride resin composition comprising 0 to 200 parts by mass. (A) Metal ion composed of divalent copper ion (b) Particulate metal oxide composed of indium oxide and / or tin oxide 2. The infrared absorbing agent contains a metal ion composed of a divalent copper ion, and a phosphoric acid group-containing compound composed of a phosphoric acid ester or a phosphonic acid ester. 1. The vinyl chloride resin composition according to 1. 3. The phosphoric acid group-containing compound is a phosphoric acid ester represented by the following formula (1) or a phosphonic acid ester represented by the following formula (2), wherein: 2. The vinyl chloride resin composition according to item 2. Embedded image Embedded image 4. 0.01 to 10 parts by mass of a specific visible light absorbing agent that absorbs visible light having a wavelength of 500 to 600 nm is contained with respect to 100 parts by mass of a vinyl chloride resin. The vinyl chloride resin composition according to any one of claims 1 to 3. 5. The vinyl chloride resin composition according to claim 4, wherein the specific visible light absorber is a metal ion composed of a divalent cobalt ion.