JP7341958B2 - Tape and air conditioner piping - Google Patents

Description

The present invention relates to tapes and air conditioner piping.

The outer periphery of air conditioner piping is wrapped with protective tape made of vinyl chloride resin to improve durability. Since the piping is mainly located outdoors, the protective tape is exposed to sunlight and rain. As a result, over time, the protective tape becomes discolored, hardened, etc., and it is desired to improve its weather resistance.

As a method for improving the weather resistance of a composition containing a vinyl chloride resin, for example, Patent Documents 1 to 4 disclose a method of adding a phosphate ester to the composition.

Japanese Patent Application Publication No. 2001-214018 Japanese Patent Application Publication No. 2001-226551 Japanese Patent Application Publication No. 2004-154116 Japanese Patent Application Publication No. 2002-265725

However, the above method does not provide sufficient weather resistance, and further improvement in weather resistance is desired. An object of the present invention is to provide a tape having excellent weather resistance and air conditioner piping using the tape.

The invention is as follows.
[1] 50 to 80 parts by mass of vinyl chloride resin,
20 to 50 parts by mass of a plasticizer (total of vinyl chloride resin and plasticizer is 100 parts by mass),
0.1 to 2 parts by mass of phosphoric acid ester,
0.1 to 2 parts by mass of a phosphite ester with a molecular weight of 1000 or more;
0.1 to 2 parts by mass of a phenolic antioxidant;
Zinc-based heat stabilizer,
A tape comprising a base layer containing.

[2] The phosphoric acid ester is triphenyl phosphate, tricylenyl phosphate, tricresyl phosphate, 2-ethylhexyl diphenyl phosphate, t-butylphenyl diphenyl phosphate, bis-(t-butylphenyl) phenyl phosphate, tris-( From t-butylphenyl) phosphate, isopropylphenyl diphenyl phosphate, bis-(isopropylphenyl) phenyl phosphate, tris-(isopropylphenyl) phosphate, a compound represented by the following formula (I), and a compound represented by the following formula (II) The tape according to [1], which is at least one compound selected from the group consisting of:

(In formula (I), R ₁ to R ₄ each independently represent an alkyl group having 6 to 18 carbon atoms, a cycloalkyl group, an aryl-substituted alkyl group, an aryl group, or an alkyl-substituted aryl group.)

(In formula (II), R ₅ to R ₈ each independently represent an alkyl group having 6 to 18 carbon atoms, a cycloalkyl group, an aryl-substituted alkyl group, an aryl group, or an alkyl-substituted aryl group.)

[3] The tape according to [1] or [2], wherein the phosphoric ester is a compound represented by the following formula (i).

[4] The tape according to any one of [1] to [3], wherein the phosphite is a compound represented by the following formula (III).

(In formula (III), R ₉ to R ₁₂ each independently represent an alkyl group having 12 to 24 carbon atoms. R ₁₃ and R ₁₄ each independently represent a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, (R ₁₅ and R ₁₆ each independently represent an alkyl group having 1 to 10 carbon atoms. m and n each represent an integer of 0 to 4.)

[5] The tape according to any one of [1] to [4], wherein the tape further includes an adhesive layer.

[6] The tape according to any one of [1] to [4], wherein the tape does not include an adhesive layer.

[7] The tape according to any one of [1] to [6], which is a tape for air conditioner piping.

[8] Air conditioner piping bound using the tape described in [7].

According to the present invention, it is possible to provide a tape having excellent weather resistance and air conditioner piping using the tape.

The tape according to the invention includes a base layer. The base material layer contains 50 to 80 parts by mass of vinyl chloride resin, 20 to 50 parts by mass of plasticizer, 0.1 to 2 parts by mass of phosphoric acid ester, and 0.1 to 2 parts by mass. Contains a phosphite ester with a molecular weight of 1000 or more, 0.1 to 2 parts by mass of a phenolic antioxidant, and a zinc heat stabilizer. Note that the total amount of vinyl chloride resin and plasticizer was 100 parts by mass.

The present inventors have proposed a tape having a base layer containing a vinyl chloride resin and a plasticizer, in which a phosphoric acid ester, a phosphite having a molecular weight of 1000 or more, and a phenolic antioxidant are added to the base layer. It has been found that by adding at a ratio of , coloring and hardening can be reduced and sufficient weather resistance can be obtained. Although the details of the mechanism by which sufficient weather resistance is obtained are not clear, it is presumed that the phosphoric acid ester transesterifies with the ester moiety of the plasticizer in the vinyl chloride resin, thereby suppressing the photodegradation of the plasticizer. Furthermore, phosphorous acid esters with a molecular weight of 1000 or more and phenolic antioxidants have high molecular weights, so they volatilize and decompose slowly, and by synergistically suppressing the oxidative decomposition of the phosphoric acid esters, the tape becomes colored as a whole. It is assumed that hardening and hardening are sufficiently reduced.

The tape according to the present invention may include other layers in addition to the base layer. Examples of other layers include an adhesive layer, an undercoat layer, and the like. The thickness of the tape is not particularly limited, but can be, for example, 100 to 400 μm. Embodiments of the present invention will be described below, but the present invention is not limited to the following embodiments.

[Base material layer]
The base material layer according to the present invention contains a vinyl chloride resin, a plasticizer, a phosphate ester, a phosphite ester, and a phenolic antioxidant in predetermined amounts, and further contains a zinc heat stabilizer. In addition to these components, the base layer can also contain a drip-proofing agent, a fluorine-containing compound, a lubricant or an anti-blocking agent, an ultraviolet absorber, a light stabilizer, an inorganic filler, a pigment, etc., as necessary. . The thickness of the base material layer is not particularly limited, but may be, for example, 70 to 300 μm.

(vinyl chloride resin)
The base material layer according to the present invention contains a vinyl chloride resin. In addition to polyvinyl chloride (vinyl chloride homopolymer), vinyl chloride resins include vinyl chloride and other monomers such as ethylene, propylene, vinyl acetate, vinylidene chloride, acrylic acid, acrylic ester, methacrylic acid, and methacrylic ester. , maleic acid, fumaric acid, acrylonitrile, a copolymer with alkyl vinyl ether, or a mixture thereof.

The amount of vinyl chloride resin contained in the base material layer is 50 to 80 parts by mass, preferably 50 to 78 parts by mass, and 60 to 80 parts by mass, preferably 50 to 78 parts by mass, based on a total of 100 parts by mass of vinyl chloride resin and plasticizer. The amount is more preferably 76 parts by weight, and even more preferably 65 to 75 parts by weight. When the content of the vinyl chloride resin is 50 parts by mass or more, the film strength required as a tape can be maintained. When the content of the vinyl chloride resin is 80 parts by mass or less, the film can have appropriate curved surface followability and elongation. The total content of vinyl chloride resin and plasticizer contained in 100% by mass of the base material layer can be 80% by mass or more, preferably 85% by mass or more, and 90% by mass or more. It is more preferable that there be. Moreover, the content ratio can be 97% by mass or less.

(Plasticizer)
The base material layer according to the present invention contains a plasticizer. The plasticizer is not particularly limited as long as it can plasticize the vinyl chloride resin, but examples include di-n-octyl phthalate, di-2-ethylhexyl phthalate, diisononyl phthalate (DINP), dibutyl phthalate, butylbenzyl phthalate, Phthalate ester plasticizers such as dilauryl phthalate, didecyl phthalate, diundecyl phthalate, and ditridecyl phthalate; Adipic ester plasticizers such as dioctyl adipate, ditrinonyl adipate, and diisodecyl adipate; Polyester plasticizers; Sebacate esters Examples include trimellitic acid ester plasticizers; epoxy plasticizers such as epoxidized soybean oil. These plasticizers may be used alone or in combination of two or more. Among these, as the plasticizer, phthalate ester plasticizers are preferred, and diisononyl phthalate (DINP) is more preferred. Note that in the present invention, the plasticizer does not include phosphoric acid ester.

The amount of plasticizer contained in the base layer is 20 to 50 parts by weight, preferably 22 to 50 parts by weight, and preferably 24 to 40 parts by weight, based on a total of 100 parts by weight of the vinyl chloride resin and plasticizer. It is more preferably 25 to 35 parts by weight, and even more preferably 25 to 35 parts by weight. When the content of the plasticizer is 20 parts by mass or more, appropriate curved surface followability and elongation can be imparted to the film. When the content of the plasticizer is 50 parts by mass or less, it is possible to maintain a film strength preferable as a tape.

(phosphate ester)
The base material layer according to the present invention contains a phosphoric acid ester. Phosphate esters are not particularly limited, but include, for example, triphenyl phosphate, tricylenyl phosphate, tricresyl phosphate, 2-ethylhexyl diphenyl phosphate, t-butylphenyl diphenyl phosphate, bis-(t-butylphenyl) phenyl phosphate, and tris. -(t-butylphenyl) phosphate, isopropylphenyl diphenyl phosphate, bis-(isopropylphenyl) phenyl phosphate, tris-(isopropylphenyl) phosphate, compound represented by the following formula (I), compound represented by the following formula (II) etc. are preferred.

(In formula (I), R ₁ to R ₄ each independently represent an alkyl group having 6 to 18 carbon atoms, a cycloalkyl group, an aryl-substituted alkyl group, an aryl group, or an alkyl-substituted aryl group.)

(In formula (II), R ₅ to R ₈ each independently represent an alkyl group having 6 to 18 carbon atoms, a cycloalkyl group, an aryl-substituted alkyl group, an aryl group, or an alkyl-substituted aryl group.)

In R ₁ to R ₄ of the formula (I), examples of the alkyl group having 6 to 18 carbon atoms include hexyl group, heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, and the like. Examples of the cycloalkyl group include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, and a cyclohexyl group. Examples of the aryl-substituted alkyl group include a benzyl group. Examples of the aryl group include phenyl group and naphthyl group. Examples of the alkyl-substituted aryl group include tolyl group and xylyl group. Specific examples of the compound represented by the formula (I) include compounds represented by the following formula (i).

In R ₅ to R ₈ of the formula (II), the alkyl group having 6 to 18 carbon atoms, cycloalkyl group, aryl-substituted alkyl group, aryl group, and alkyl-substituted aryl group include R ₁ to R 8 of the formula (I) It can be similar to _R4 . Specific examples of the compound represented by the formula (II) include compounds in which R ₅ to R ₈ are phenyl groups.

One type of these phosphoric acid esters may be used, or two or more types may be used in combination. Among these, as the phosphoric ester, from the viewpoint of exhibiting higher weather resistance, the compound represented by the formula (I) is preferred, and the compound represented by the formula (i) is more preferred.

The amount of phosphoric acid ester contained in the base material layer is 0.1 to 2 parts by mass, and 0.2 to 1.9 parts by mass, based on 100 parts by mass of the vinyl chloride resin and plasticizer. The amount is preferably from 0.3 to 1.8 parts by weight, even more preferably from 0.5 to 1.7 parts by weight. When the content of the phosphoric acid ester is 0.1 part by mass or more, coloring and hardening are suppressed. When the content of the phosphoric ester is 2 parts by mass or less, coloration resulting from decomposition of the phosphoric ester can be suppressed.

(phosphite ester)
The base material layer according to the present invention contains a phosphite having a molecular weight of 1000 or more. As the phosphite ester, a compound represented by the following formula (III) is preferable from the viewpoint of improving weather resistance.

(In formula (III), R ₉ to R ₁₂ each independently represent an alkyl group having 12 to 24 carbon atoms. R ₁₃ and R ₁₄ each independently represent a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, (R ₁₅ and R ₁₆ each independently represent an alkyl group having 1 to 10 carbon atoms. m and n each represent an integer of 0 to 4.)

In formula (III), the alkyl group having 12 to 24 carbon atoms in R ₉ to R ₁₂ is preferably an alkyl group having 12 to 20 carbon atoms, more preferably an alkyl group having 12 to 16 carbon atoms. The alkyl group having 1 to 10 carbon atoms in R ₁₃ and R ₁₄ is preferably an alkyl group having 1 to 5 carbon atoms, such as a methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl, t-butyl group, etc. can be mentioned. The alkyl group having 1 to 10 carbon atoms in R ₁₅ and R ₁₆ is preferably an alkyl group having 1 to 5 carbon atoms, such as methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, t-butyl group, etc. can be mentioned. Each of m and n is preferably an integer of 0 to 2. Note that the molecular weight of the compound represented by formula (III) is 1000 or more.

Examples of the compound represented by the formula (III) include tetra(C12-C15 alkyl)-4,4'-isopropylidene diphenyl diphosphite (molecular weight: 1028-1196) represented by the following formula (ii), the following formula Examples include 4,4'-butylidene bis(3-methyl-6-t-butylphenyl ditridecyl phosphite) (molecular weight: 1108) represented by (iii). These phosphorous acid esters may be used alone or in combination of two or more. Note that the upper limit of the molecular weight of the phosphite ester can be, for example, 10,000 or less, and can also be 3,000 or less.

(In formula (ii), R ₁₇ to R ₂₀ are each independently an alkyl group having 12 to 15 carbon atoms.)

The amount of phosphite contained in the base material layer is 0.1 to 2 parts by mass, and 0.2 to 1.9 parts by mass, based on 100 parts by mass of the vinyl chloride resin and plasticizer. It is preferably from 0.3 to 1.8 parts by weight, even more preferably from 0.5 to 1.7 parts by weight. When the content of the phosphite is 2 parts by mass or less, coloration resulting from the decomposition product of the phosphite can be suppressed.

(phenolic antioxidant)
The base material layer according to the present invention contains a phenolic antioxidant. The phenolic antioxidant is not particularly limited, but for example, 1,3,5-tris(3,5-di-t-butyl-4-hydroxybenzyl)-1,3,5-triazine-2,4,6 (1H,3H,5H)-trione, 4,4',4''-(1-methylpropanyl-3-ylidene)tris(6-t-butyl-m-cresol), octadecyl 3-(3,5 -di-t-butyl-4-hydroxyphenyl)propionate, 3,9-bis{2-[3-(3-t-butyl-4-hydroxy-5-methylphenyl)propionyloxy]-1,1- dimethylethyl}-2,4,8,10-tetraoxaspiro[5,5]undecane, 1,3,5-tris(3,5-di-t-butyl-4-hydroxyphenylmethyl)-2,4 , 6-trimethylbenzene, pentaerythritol tetrakis [3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], 6,6'-di-tert-butyl-4,4'-butylidene di-m - Examples include cresol. Among these, 6,6'-di-tert-butyl-4,4'-butylidene di-m-cresol is preferred from the viewpoint of improving weather resistance. Examples of commercially available phenolic antioxidants include Irganox 1010 (trade name, manufactured by BASF Japan Ltd.), Adekastab AO-20, AO-30, AO-40, AO-50, AO-50F, AO- Examples include 50T, AO-60, AO-60G, AO-80, AO-330 (all trade names, manufactured by ADEKA Co., Ltd.). These phenolic antioxidants may be used alone or in combination of two or more.

The amount of the phenolic antioxidant contained in the base layer is 0.1 to 2 parts by mass, and 0.2 to 1.9 parts by mass, based on 100 parts by mass of the vinyl chloride resin and plasticizer. The amount is preferably from 0.3 to 1.8 parts by weight, and even more preferably from 0.5 to 1.7 parts by weight. When the content of the phenolic antioxidant is 0.1 part by mass or more, coloring and hardening can be prevented. When the content of the phenolic antioxidant is 2 parts by mass or less, coloring caused by the antioxidant can be prevented.

(Zinc-based heat stabilizer)
The base material layer according to the present invention contains a zinc-based heat stabilizer from the viewpoint of improving heat resistance. Examples of zinc-based heat stabilizers include zinc stearate and zinc octoate. These zinc-based heat stabilizers may be used alone or in combination of two or more. Further, in addition to the zinc-based heat stabilizer, other heat stabilizers may be used in combination. Other heat-resistant stabilizers include, for example, barium stearate, calcium stearate, barium ricinoleate, calcium laurate, calcium oleate, and the like. These other heat-resistant stabilizers may be used alone or in combination of two or more.

The amount of the zinc-based heat stabilizer contained in the base material layer is not particularly limited, but it is preferably 0.1 to 2 parts by mass, and 0.1 to 2 parts by mass, based on a total of 100 parts by mass of the vinyl chloride resin and plasticizer. The amount is more preferably 15 to 1 part by weight, and even more preferably 0.2 to 0.5 part by weight. When the content of the zinc-based heat stabilizer is 0.1 to 2 parts by mass, sufficient heat resistance of the tape can be obtained.

(Lubricant or anti-stick agent)
The base material layer according to the present invention can contain a lubricant or an anti-blocking agent as necessary. The lubricant or anti-stick agent is not particularly limited, but includes, for example, fatty acid lubricants such as stearic acid, isostearic acid, and palmitic acid; fatty acid amide lubricants such as stearamide, methylene bis stearamide, and ethylene bis stearamide; butyl Examples include ester lubricants such as palmitate and butyl stearate; polyethylene wax; liquid paraffin, and the like.

These lubricants or anti-tack agents may be used alone or in combination of two or more. When the base material layer contains a lubricant or an anti-blocking agent, the amount of the lubricant and anti-blocking agent contained in the base material layer is not particularly limited, but for example, 0 to 100 parts by mass of the vinyl chloride resin and the plasticizer. .1 to 0.4 parts by mass.

(Ultraviolet absorber)
The base material layer according to the present invention can contain an ultraviolet absorber as necessary from the viewpoint of improving weather resistance. The UV absorber is not particularly limited, but includes, for example, benzophenone-based, benzotriazole-based, salicylic acid ester-based, and cyanoacrylate-based UV absorbers. These ultraviolet absorbers may be used alone or in combination of two or more. When the base layer contains an ultraviolet absorber, the amount of the ultraviolet absorber contained in the base layer is not particularly limited, but is, for example, 0.1 to 0 with respect to 100 parts by mass of the vinyl chloride resin and plasticizer. .4 parts by weight.

(light stabilizer)
The base material layer according to the present invention can contain a light stabilizer as necessary from the viewpoint of improving weather resistance. The light stabilizer is not particularly limited, but examples thereof include hindered amine light stabilizers. When the base material layer contains a light stabilizer, the amount of the light stabilizer contained in the base material layer is not particularly limited, but is, for example, 0.1 to 0 with respect to 100 parts by mass of the vinyl chloride resin and the plasticizer. .4 parts by weight.

(Inorganic filler)
The base material layer according to the present invention can contain an inorganic filler as necessary from the viewpoint of strength. Examples of the inorganic filler include, but are not limited to, calcium carbonate, magnesium carbonate, magnesium silicate, silicon oxide, aluminum oxide, aluminum hydroxide, magnesium hydroxide, hydrotalcites, and the like. These inorganic fillers may be used alone or in combination of two or more. When the base material layer contains an inorganic filler, the amount of the inorganic filler contained in the base material layer is not particularly limited, but is, for example, 5 to 20 parts by mass with respect to a total of 100 parts by mass of the vinyl chloride resin and the plasticizer. can be.

[Adhesive layer]
The tape according to the present invention can further include an adhesive layer in addition to the base layer from the viewpoint of adhesion to the object around which the tape is wound. The adhesive layer can be disposed on the base layer and may be in direct contact with the base layer. Also, the adhesive layer can be the outermost layer. Examples of the adhesive included in the adhesive layer include an adhesive prepared by mixing C5 petroleum resin or C9 petroleum resin with natural rubber or synthetic rubber such as SBR. The adhesive layer can contain, for example, a phosphorus-based flame retardant in addition to the adhesive. The thickness of the adhesive layer is not particularly limited, but can be, for example, 15 to 50 μm. Note that the tape according to the present invention does not need to include an adhesive layer.

[Weather resistance performance of tape]
(coloring start time)
From the viewpoint of improving weather resistance (suppressing coloring), the tape according to the present invention preferably has a coloring start time of 150 hours or more, more preferably 200 hours or more, and 300 hours or more, as measured by the method below. It is more preferable that it is, and it is especially preferable that it is 350 hours or more.

<Measurement method of coloring start time>
The tape was continuously irradiated with UV using a super accelerated weathering tester (I-Super UV tester) at an ultraviolet intensity of 90 mW/cm ² and a black panel temperature of 50° C. (hereinafter also referred to as "weather test"). ). The tapes before and after the weather resistance test were measured using a spectrophotometer CM-25cG. The time when the color difference (ΔE) from the initial stage exceeded 20 was defined as the coloring start time.

(Tensile elongation)
The tape according to the present invention preferably has a tensile elongation of 100% or more, more preferably 150% or more, as measured by the method below after 200 hours of the weather resistance test, from the viewpoint of improving weather resistance (suppressing curing). It is preferably 200% or more, and more preferably 200% or more. Further, the ratio of the tensile elongation after 200 hours of the weathering test to the tensile elongation before the weathering test is preferably 50% or more, more preferably 60% or more, and even more preferably 70% or more.

<Method for measuring tensile elongation>
The tape was cut into strips of 20 mm x 200 mm, and in an environment of 23°C and 50% relative humidity, using a Tensilon universal material testing machine, the grip distance of the chuck was 100 mm, and the speed was 5 mm/s, and the elongation at break was measured. (%) was measured.

[Tape manufacturing method]
The method for manufacturing the tape according to the present invention is not particularly limited, and for example, known methods such as a calendar method, an extrusion method, and an inflation method can be used. Furthermore, there are no particular limitations on the manufacturing conditions during tape manufacturing.

[Application]
The use of the tape according to the present invention is not particularly limited as long as weather resistance is required, and examples include air conditioner piping. That is, the tape according to the present invention can be a tape for air conditioner piping. The tape containing the adhesive layer can be used, for example, by being wrapped around a refrigerant pipe as it is. Further, a tape that does not include an adhesive layer can be used, for example, by wrapping it around a refrigerant pipe and then fixing both ends with tape containing an adhesive layer. In the air conditioner piping according to the present invention, refrigerant pipes and the like are bound together using the tape according to the present invention.

EXAMPLES Hereinafter, the present invention will be explained in detail with reference to Examples, but the present invention is not limited to the following description.

[Example 1]
70 parts by mass of vinyl chloride homopolymer (trade name: TH1000, manufactured by Taiyo Vinyl Co., Ltd.), 30 parts by mass of diisononyl phthalate (DINP), and a phosphoric acid ester represented by the above formula (i) ([4-[2- 0.3 parts by mass of [4-bis(2-methylphenoxy)phosphoryloxyphenyl]propan-2yl]phenyl]bis(2-methylphenyl)phosphate) and a phosphite ester represented by the above formula (iii) ( 0.9 parts by mass of 4,4'-butylidene bis(3-methyl-6-t-butylphenyl ditridecyl phosphite)) and 6,6'-di-tert-butyl-4,4'-butylidene di-m- 0.3 parts by mass of cresol (trade name: ADEKA STAB AO-40, manufactured by ADEKA Co., Ltd.), 0.3 parts by mass of zinc stearate, 0.2 parts by mass of barium stearate, and pigment masterbatch (ivory) 2 .4 parts by mass were kneaded at 165° C. using a calendar roll to form a film with a thickness of 150 μm.
The pigment masterbatch (ivory) contains 0.04 parts by mass of a black pigment (product name: P4710, manufactured by Dainichiseika Chemical Industry Co., Ltd.) and a yellow pigment (product name: P4490, manufactured by Dainichiseika Chemical Industry Co., Ltd.). ), 0.05 parts by mass of an orange pigment (product name: P4377, manufactured by Dainichiseika Chemical Co., Ltd.), and dibasic lead stearate (DSL) as a lubricant (Sakai Chemical Co., Ltd.). (manufactured by Kogyo Co., Ltd.) and 0.3 parts by mass were mixed in a Henschel mixer.
The tensile elongation and coloring start time of the obtained tape were measured by the method described above. The results are shown in Table 1.

[Examples 2 to 9, Comparative Examples 1 to 3]
A tape was produced in the same manner as in Example 1, except that the types and amounts of each component were changed as shown in Table 1, and the tensile elongation and coloring start time were measured. The results are shown in Table 1.

[Example 10, Comparative Example 4]
The following adhesives were applied to the tapes produced in Example 9 and Comparative Example 3 using a comma coater, respectively, to produce tapes having adhesive layers with a thickness of 25 μm. As the adhesive, 40 parts by mass of acrylic modified natural rubber latex (MMA/NR copolymer latex (MMA/NR composition ratio = 30/70), manufactured by Regitex Co., Ltd., product name: MG-40S), styrene- 60 parts by mass of butadiene copolymer latex (styrene/butadiene composition ratio = 25/75, manufactured by JSR Corporation, trade name: T-093A), tackifier resin emulsion (C5 petroleum resin emulsion, manufactured by Arakawa Chemical Co., Ltd.), A mixture of 120 parts by mass (trade name: AP2100NT) was used.

Each compound in Table 1 is as follows.
Phosphoric ester (A): Compound represented by the above formula (i) ([4-[2-[4-bis(2-methylphenoxy)phosphoryloxyphenyl]propan-2yl]phenyl]bis(2-methylphenyl) phosphate)
Phosphate ester (B): Tricresyl phosphate (product name: Sansocizer TCP, manufactured by Shin Nippon Chemical Co., Ltd.)
Phosphite (A): Compound represented by the above formula (iii) (4,4'-butylidenebis(3-methyl-6-t-butylphenyl ditridecyl phosphite) (molecular weight: 1108))
Phenolic antioxidant (A): 6,6'-di-tert-butyl-4,4'-butylidene di-m-cresol (trade name: ADEKA STAB AO-40, manufactured by ADEKA Co., Ltd.)
Phenolic antioxidant (B): Pentaerythritol tetrakis [3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] (Product name: Irganox1010 manufactured by BASF Japan Ltd.)

As shown in Table 1, the tapes manufactured in Examples 1 to 10 had high tensile elongation, and the decrease in tensile elongation was suppressed before and after the weathering test, and curing was suppressed. In addition, it took a long time to start coloring and had excellent weather resistance. On the other hand, for the tape of Comparative Example 1 which does not contain a phenolic antioxidant, the tape of Comparative Example 2 which does not contain a phosphate ester, and the tape of Comparative Example 2 which does not contain a phosphoric acid ester, 2 parts by mass of a phosphoric ester is added to 100 parts by mass of the vinyl chloride resin and the plasticizer. The tapes of Comparative Examples 3 and 4 containing more than 50% of the total amount had lower tensile elongation, shorter color onset time, and lower weather resistance than the tapes of Examples 1 to 10.

Claims (8)

50 to 80 parts by mass of vinyl chloride resin,
20 to 50 parts by mass of a plasticizer (total of vinyl chloride resin and plasticizer is 100 parts by mass),
0.1 to 2 parts by mass of phosphoric acid ester,
0.1 to 2 parts by mass of a phosphite ester with a molecular weight of 1000 or more;
0.1 to 2 parts by mass of a phenolic antioxidant;
Zinc-based heat stabilizer,
A tape comprising a base layer containing. The phosphoric acid ester may be triphenyl phosphate, tricylenyl phosphate, tricresyl phosphate, 2-ethylhexyl diphenyl phosphate, t-butylphenyl diphenyl phosphate, bis-(t-butylphenyl)phenyl phosphate, tris-(t-butyl phenyl) phosphate, isopropylphenyl diphenyl phosphate, bis-(isopropylphenyl) phenyl phosphate, tris-(isopropylphenyl) phosphate, a compound represented by the following formula (I), and a compound represented by the following formula (II) The tape according to claim 1, wherein the tape is at least one selected compound.

(In formula (I), R ₁ to R ₄ each independently represent an alkyl group having 6 to 18 carbon atoms, a cycloalkyl group, an aryl-substituted alkyl group, an aryl group, or an alkyl-substituted aryl group.)

(In formula (II), R ₅ to R ₈ each independently represent an alkyl group having 6 to 18 carbon atoms, a cycloalkyl group, an aryl-substituted alkyl group, an aryl group, or an alkyl-substituted aryl group.) The tape according to claim 1 or 2, wherein the phosphoric acid ester is a compound represented by the following formula (i).

The tape according to any one of claims 1 to 3, wherein the phosphite is a compound represented by the following formula (III).

(In formula (III), R ₉ to R ₁₂ each independently represent an alkyl group having 12 to 24 carbon atoms. R ₁₃ and R ₁₄ each independently represent a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, (R ₁₅ and R ₁₆ each independently represent an alkyl group having 1 to 10 carbon atoms. m and n each represent an integer of 0 to 4.) The tape according to any one of claims 1 to 4, wherein the tape further comprises an adhesive layer. 5. A tape according to any one of claims 1 to 4, wherein the tape does not include an adhesive layer. The tape according to any one of claims 1 to 6, which is a tape for air conditioner piping. Air conditioner piping bound using the tape according to claim 7.