JPH1045944A - Anticlouding and antifogging agent for synthetic resin and synthetic resin composition and agricultural film containing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an anticlouding and antifogging agent which can impart excellent anticlouding properties and antifogging properties to a synthetic resin when added thereto by mixing a specified polyoxyethylenealkylamine or amide with a specified fatty acid ester and a specified branched higher fatty acid. SOLUTION: This agent comprises a compound (1) represented by formula I (wherein R1 is a 12-22C alkyl, an alkenyl or an acyl; and (m) and (n) are each a number of 1 or greater and have a sum of 2-10 on the average) or a 12-22C (un)saturated fatty acid ester [A] of compound (1), an ester (B) of a 2-18C polyhydric alcohol with a fatty acid (this acid is a 12-22C (un)saturated fatty acid) or an adduct [B] of this ester to an alkylene oxide and a branched higher fatty acid represented by formula II (wherein R2 and R3 are each a 5-16C linear or branched alkyl) or an ester [C] of this acid with compound (1). The mixing ratio among these components are such that (A+B)/C=50/50 to 98/2, and A/B=100/0 to 0/100 by weight.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an antifogging / fog-preventing agent for synthetic resins, a synthetic resin composition and an agricultural film using the same, and more particularly, it is excellent when added to a synthetic resin such as a polyolefin resin. The present invention relates to an anti-fog anti-fog agent for synthetic resin capable of imparting anti-fog performance and anti-fog performance, and an agricultural film using the same, which is excellent in low-temperature anti-fog properties, anti-fog properties, transparency and anti-fog properties.

[0002]

2. Description of the Related Art Synthetic resins are currently used in a wide range of fields because of their excellent properties. However, since the synthetic resin surface is hydrophobic in nature, when using a molded product, depending on the conditions such as temperature and humidity, the adsorbed or aggregated water covers the surface as fine water droplets, causing clouding. There are various inconveniences.

[0003] For example, when a synthetic resin film is used for agricultural cultivation or tunnel cultivation, moisture evaporated from the ground surface or crops aggregates as fine water droplets on the inner surface of the film, slowing the growth of the crop, Drops of water falling on crops can cause disease.

[0004] In order to prevent these drawbacks, the most frequently used method at present is to mix and knead an antifogging agent when molding a synthetic resin product, or There is a method of applying an antifogging agent to the surface. Antifogging agents used in these methods include sorbitan higher fatty acid esters (JP-B-38-6572) and their ethylene oxide adducts (JP-B-55-9431) and glycerin fatty acid esters (JP-B-38-4174). ) And polyglycerin fatty acid esters (Japanese Patent Publication No. 43-8605). But,
These antifogging agents have difficulty in achieving both antifogging level (low temperature antifogging property and initial antifogging property) and antifogging sustainability, and are used in places where the daily temperature range is large or where the temperature is extremely low. There was a problem that the fogging performance was insufficient.

[0005] As antifogging agents to solve the above problems,
Polyoxyethylene alkylamine (JP-B-44-15184)
), Higher fatty acid esters thereof (JP-B-62-33256), and blends of these with polyhydric alcohol fatty acid esters (JP-A-48-104638). The latter two types of antifogging agents have good antifogging level and persistence, but blooming phenomenon occurs on the film surface to significantly reduce the transparency and is not usable.

Agricultural houses and tunnels using a synthetic resin film containing an antifogging agent may cause new problems. In the morning or evening when the temperature difference between the inside and outside of the film becomes large, or at night when the humidity is high or during rainfall, a phenomenon that fog is generated near the inner surface of the film is often observed. This fog causes the crops grown in the house or tunnel to die or rot, and also causes various diseases.

As means for solving these problems, there are known a fluorinated surfactant (JP-B-59-35573) and a fluorinated oligomer (JP-B-62-18579) which are referred to as an anti-fog agent together with an anti-fogging agent. ) Is kneaded into a synthetic resin. These additives provide good anti-fog effects,
However, there is a problem that the production cost of the product is increased due to the high cost.

[0008]

The inventors of the present invention have conducted intensive studies to solve these problems, and as a result, by adding them to synthetic resins such as polyolefin resins, excellent antifogging performance and excellent antifogging performance have been obtained. The present invention provides an anti-fog anti-fog agent capable of imparting anti-fog performance.

That is, the present invention provides (A) the following general formula (1)

[0010]

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(Wherein R ₁ is an alkyl group having 12 to 22 carbon atoms,
An alkenyl group or an acyl group, wherein m and n are m + n
(Hereinafter referred to as compound (1)) or a fatty acid ester of compound (1) (provided that the fatty acid has 12 to 22 carbon atoms).
Wherein 0.5 to 2.0 of the two hydroxyl groups of compound (1) form an ester bond with the fatty acid (hereinafter referred to as component (A)); Fatty acid esters of polyhydric alcohols of numbers 2 to 18 (however,
Fatty acids are saturated or unsaturated fatty acids having 12 to 22 carbon atoms)
Or an alkylene oxide adduct of the fatty acid ester (provided that the alkylene oxide has 2 to 3 carbon atoms and the average number of moles added is 0.1 to 20 mol per 1 mol of the fatty acid ester) (hereinafter referred to as component (B) (C) and (C) the following general formula (2)

[0012]

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(Wherein R ₂ and R ₃ are linear or branched alkyl groups having 5 to 16 carbon atoms) or a fatty acid ester of compound (1) ,
The fatty acid is a fatty acid represented by the general formula (2), and 0.5 to 2.0 of the two hydroxyl groups of the compound (1) form an ester bond with the fatty acid) (hereinafter referred to as component (C)). ) By weight ratio [(A) + (B)] / (C) = 50 / 50-98 /
And (A) / (B) = 100/0 to 0/100.

Further, the present invention provides the antifogging and antifogging agent described above in an amount of 0.1 to 5 parts by weight, preferably 100 parts by weight of the synthetic resin.
It relates to a synthetic resin composition characterized by containing 0.5 to 4 parts by weight.

[0015] The present invention also relates to an agricultural film comprising the above synthetic resin composition.

The present invention also relates to an agricultural film comprising at least one film comprising the above-mentioned synthetic resin composition and comprising at least two layers.

Further, the present invention relates to a polyolefin resin 1
(A) The following general formula (1)

[0018]

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(Wherein R ₁ is an alkyl group having 12 to 22 carbon atoms;
An alkenyl group or an acyl group, wherein m and n are m + n
(Hereinafter referred to as compound (1)) or a fatty acid ester of compound (1) (provided that the fatty acid has 12 to 22 carbon atoms).
(B) a fatty acid of a polyhydric alcohol having 2 to 18 carbon atoms, wherein 0.5 to 2.0 of two hydroxyl groups of the compound (1) form an ester bond with the fatty acid. Esters (provided that the fatty acid is a saturated or unsaturated fatty acid having 12 to 22 carbon atoms) or an alkylene oxide adduct of the fatty acid ester (provided that the alkylene oxide has 2 to 3 carbon atoms and Ester 1
0.1 to 20 mol based on the mol), and (C) the following general formula (2)

[0020]

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(Wherein R ₂ and R ₃ are linear or branched alkyl groups having 5 to 16 carbon atoms) or a fatty acid ester of compound (1) ,
The fatty acid is a fatty acid represented by the general formula (2), and 0.5 to 2.0 of two hydroxyl groups of the compound (1) form an ester bond with the fatty acid) by a weight ratio of [(A) + (B)]
/ (C) = 70 / 30-90 / 5 and (A) / (B) = 100
Agricultural film comprising a synthetic resin composition characterized by containing 0.1 to 5 parts by weight, preferably 0.5 to 4 parts by weight of an antifogging and antifogging agent contained in a ratio of 0/0 to 10/90, or the synthetic film. 2 including at least one layer of a film composed of a resin composition
The present invention relates to an agricultural film composed of layers.

Further, the present invention relates to a branched higher fatty acid or a fatty acid ester used for the component (C), wherein R ₂ and R ₃ in the general formula (2) each have a branched chain having at least two methyl groups. It relates to the above-mentioned agricultural film, which is an alkyl group.

The agricultural film of the present invention is excellent in low-temperature antifogging property, antifogging property, transparency and fog resistance.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail. Generally, higher sorbitan fatty acid esters and higher polyglycerin fatty acid esters are used as antifogging agents for agricultural films, and auxiliaries for improving these antifogging levels, initial antifogging properties and low-temperature antifogging properties (here In this case, an ethylene oxide adduct of a polyhydric alcohol fatty acid ester or an ethylene oxide adduct of a higher alcohol is used. Usually, when these wetting improvers are used, the antifogging durability is lower than when they are not added.

Compound (1) which is the component (A) of the present invention
Exhibits an excellent antifogging level, but has poor antifogging durability when used alone. Therefore, in the present invention, it is used in combination with a higher fatty acid ester of compound (1) or a polyhydric alcohol fatty acid ester of component (B). I do. Thereby, the antifogging level, the initial antifogging property and the low-temperature antifogging property can be improved without lowering the antifogging durability.

[0026] In Compound (1), the general formula (1) the number of carbon atoms in the alkyl group R ₁ in is 12 to 22, when using this agent under typical environment, especially 16 to 22 is preferred . On the other hand, the average number of addition moles of ethylene oxide represented by m + n in the general formula (1) is 2 to 10 (m and n
Is a number of 1 or more), preferably m + n = 2 to 4 (average value)
It is. Especially when it is desired to improve the anti-fogging level, initial anti-fogging property and low-temperature anti-fogging property, or has a low melting point (liquid at normal temperature)
If you want to reduce bloom, the average value of m + n is 4
It is better to use small amounts of larger compounds.

The fatty acid ester of compound (1), which is the component (A) of the present invention, is excellent in antifogging level, initial antifogging property, low-temperature antifogging property and antifogging durability even when used alone. . The esterification degree of this compound is such that 0.5 to 2.0 mol of a fatty acid is ester-bonded to 1 mol of the compound (1), and particularly preferably 1.0 to 1.5 mol. If the degree of esterification is lower than this, the durability of antifogging is lowered and bloom is deteriorated. If the degree of esterification is too high, low-temperature antifogging property and initial antifogging property are reduced. The fatty acid used is a saturated or unsaturated higher fatty acid, and the carbon number of the fatty acid is suitably from 12 to 22, but myristic acid, palmitic acid, stearic acid, behenic acid and mixed acids thereof are particularly preferable. .

The above component (A) can be used alone or as a mixture of two or more.

As the fatty acid ester of the polyhydric alcohol which is the component (B) of the present invention, the polyhydric alcohol constituting the fatty acid ester has 2 to 18 carbon atoms, for example, sorbitan, sorbitol, glycerin, polyglycerin, Pentaerythritol, dipentaerythritol, sucrose,
Preferred are those selected from the group consisting of ethylene glycol, polyethylene glycol, propylene glycol, polypropylene glycol, neopentyl glycol, 1,4-butanediol, 1,6-hexanediol and trimethylolpropane, among which sorbitan,
Sorbitol, glycerin, polyglycerin, pentaerythritol, and dipentaerythritol are preferred from the viewpoint of antifogging durability. The fatty acid constituting the ester is a saturated or unsaturated higher fatty acid, and the fatty acid has 12 to 22, preferably 14 to 18 carbon atoms. These fatty acids can be used alone or in combination of two or more.

The component (B) used in the present invention has at least one ester group in the molecule, and
It is preferable that (the number of esters) / (the number of hydroxyl groups of the polyhydric alcohol before esterification) ≦ 0.5.

Examples of the alkylene oxide adduct of the polyhydric alcohol fatty acid ester include alkylene oxides having 2 to 3 carbon atoms, preferably those to which ethylene oxide is independently added. The number of moles added is preferably 0.1 to 20 moles, and particularly preferably 1 to 10 moles in the case of sorbitan fatty acid esters, per mole of the ester. These alkylene oxide adducts can be used as a mixture of two or more.

The component (B) may be used alone or
It can be used as a mixture of more than one species.

In the present invention, the mixing ratio of the components (A) and (B) is an arbitrary mixing ratio of (A) / (B) = 100/0 to 0/100. 100/0 to 10 /
At 90, component (A) is made an essential component. The reason is,
By making the component (A) an essential component, the antifogging level, the initial antifogging property and the low-temperature antifogging property can be improved without lowering the antifogging durability, and the generation of fog is reduced.

The component (C) of the present invention, which is represented by the general formula (2)
The alkyl groups R ₂ and R _{3 in} the formula of the branched higher fatty acid represented by the formula are linear or branched alkyl groups having 5 to 16 carbon atoms. As branched higher fatty acids, those in which R ₂ and R ₃ are linear alkyl groups are 2-hexyldecanoic acid, 2-heptylundecanoic acid, 2-octyldodecanoic acid, 2-decyltetradecanoic acid, 2-undecinepentadecanoic acid, 2-
Dodecyl hexadecanoic acid, 2-tetradecyl octadecanoic acid, 2-hexadecyl octadecanoic acid, 2-tetradecyl eicosanoic acid, 2-hexadecyl eicosanoic acid, and the like, wherein R ₂ and R ₃ are each a branched alkyl group. Things are
2,10-dimethyl-5-undecanoic acid, 4,8-dimethyl-
5-undecanoic acid (isomyristic acid), 2,2,4,8,10,
Examples include 10-hexamethyl-5-undecanoic acid (isostearic acid) and 4,12-dimethyl-9-pentadecanoic acid. Among them, when used for agricultural films, in the branched higher fatty acid or the fatty acid ester, R ₂ and R ₃ in the general formula (2) may be a branched alkyl group having two or more methyl groups each. Generally preferred. In particular, it is effective when a polyolefin resin is used. The ester of the compound (1) and the above-mentioned branched higher fatty acid is a compound in which 0.5 to 2.0 moles of the above-mentioned branched chain fatty acid is ester-bonded to 1 mole of the compound (1).

The present invention is characterized in that the component (C) is an essential component, and by adding the component (C),
The purpose of the present invention is to prevent the blooming phenomenon on the film surface due to the antifogging agent and prevent fog generated in the agricultural house. Its function is to control the amount of bleeding of the antifogging agent and to suppress crystallization of the antifogging agent on the film surface. The anti-fog effect is better as the number of carbon atoms in the alkyl group is larger, and as long as the number of branched chains (side chains) of the alkyl group is the same, the number of branched chains (side chains) is larger. Therefore, R ₂ and R ₃ in the general formula (2) are preferably alkyl groups each containing two or more methyl groups.

The component (C) may be used alone or
It can be used as a mixture of more than one species.

The compounding ratio of the components (A) + (B) and (C) is as follows: [(A) + (B)] / (C) = 50 / 50-98 / 2 by weight. In particular, when it is used for an agricultural film made of a polyolefin resin, [(A) + (B)] / (C) = 70/30 to 95/5 is preferable. When the ratio of the component (C) is larger than the above range, the anti-fogging property is adversely affected, and when it is small, the bloom preventing effect and the fog preventing effect do not work effectively. Further, when used in combination with the component (A), a more excellent anti-fog effect is exhibited.

The synthetic resin for which the antifogging and antifog agent of the present invention can be used includes polyvinyl chloride resin and polyolefin resins such as polyethylene, polypropylene and ethylene-vinyl acetate copolymer (EVA). Particularly suitable for polyolefin resins.

The method of using the antifogging and antifog agent of the present invention is as follows.
For example, a method of kneading at the time of molding a synthetic resin, or a method of dissolving the anti-fog and anti-fog agent of the present invention in an appropriate solvent and applying this solution to a synthetic resin molded product, and the like, may be mentioned. preferable.

The amount of the antifogging and antifog agent of the present invention added to the synthetic resin varies depending on the type, thickness, light transmission and the like of the molded article. ~
The amount is 5 parts by weight, particularly preferably 0.5 to 4.0 parts by weight. If the amount is less than 0.1 part by weight, the anti-fogging property cannot be sufficiently obtained. On the other hand, if the amount exceeds 5 parts by weight, the antifogging and antifog agent of the present invention excessively bleeds out to the film, so that the surface becomes sticky and a blooming phenomenon occurs.

The synthetic resin composition and the agricultural film of the present invention may contain, if necessary, a plasticizer, an antioxidant, a light stabilizer, a UV absorber, silica, in addition to the anti-fog and anti-fog agent of the present invention. Such an anti-blocking agent and a fluorine-based surfactant (antifog agent) may be added.

The agricultural multilayer synthetic resin film of the present invention comprises:
The mechanical properties of the film (toughness, tensile strength, etc.), heat retention, transparency (resin itself), bleed control of the anti-fog agent, dust resistance, film weight (density), etc. This is for balancing, and the resin used is not limited. However, at least one of the two or more multilayer synthetic resin films must be the synthetic resin film of the present invention. Further, the anti-fogging and anti-fog agent of the present invention may be added to an arbitrary layer irrespective of the inner layer and the outer layer, and may be added not only to one layer but also to two or more layers. Examples of the multilayer film include a three-layer film of EVA-EVA-EVA using ethylene-vinyl acetate copolymer (EVA) having different VA% (content% of vinyl acetate unit), polyethylene (LDPE) -EVA-LDPE Three-layer film, linear low density polyethylene (LLDP)
E) -EVA-LLDPE three-layer film and the like.

[0043]

By adding the anti-fog anti-fog agent of the present invention to a synthetic resin film, particularly a polyolefin resin film and a synthetic resin multilayer film containing the same, excellent initial anti-fog properties, low-temperature anti-fog properties, and low anti-fog properties can be obtained. Exhibits cloudiness, transparency and mist resistance.

[0044]

The present invention will now be described by way of examples, which should not be construed as limiting the invention. Examples and comparative examples include polyvinyl chloride and low density polyethylene (LDP).
E) Test results of anti-fogging property, anti-fog property and transparency in single-layer and multilayer films obtained based on linear low-density polyethylene (LLDPE), ethylene-vinyl acetate copolymer (EVA) Was described. Further, the anti-fog anti-fog agent of the present invention was prepared by the following method, and various evaluations were made.

Component (A): A primary alkylamine or amide was synthesized from a fatty acid, and ethylene oxide was added. Using this as a raw material, the fatty acid ester was synthesized.

Component (B): A commercially available product was used, and a commercially available product was esterified with a polyhydric alcohol and a fatty acid. Ethylene oxide addition was performed as needed.

Component (C): A commercially available branched higher alcohol was subjected to an oxidation reaction with a commercially available branched higher alcohol under alkali melting to obtain a branched higher fatty acid.

[Anti-fogging performance test] An anti-fogging performance test was conducted by the following method. That is, a small house made of stainless steel pipe (length 330 x width 290 x height 250 mm, roof surface angle 12 degrees with respect to the horizontal plane) is made with a commercial agricultural vinyl film on the side and a film sample for the anti-fog test on the roof. After that, the house is immersed in a constant temperature water bath maintained at a constant temperature and left in a constant temperature room (the house is a closed system in which the floor surface is closed by the water surface and is filled with steam). The initial antifogging property, the low-temperature antifogging property and the antifogging durability were evaluated using this apparatus.

The evaluation results were expressed on the basis of the following criteria. (Evaluation rank) 5: Completely transparent and no fogging. 4: Almost transparent, but water droplets are slightly formed. 3: Large water droplets adhere, but there is considerable transparency. 2: Large water droplets adhere as a whole and are opaque. 1: Fine water droplets adhere to the whole and are opaque.

The performance was evaluated under the following conditions. -Initial antifogging property: The antifogging level after leaving at room temperature 5 ° C / water temperature 15 ° C for 2 hours was evaluated as follows. ◎: Level exceeding 4 after 2 hours. ：: Four levels after 2 hours. Δ: Three levels after 2 hours. ×: Two levels after 2 hours. XX: One level after 2 hours. Low-temperature anti-fogging property: The anti-fogging level after 6 hours at room temperature 5 ° C./water temperature 15 ° C. was evaluated. -Antifogging durability: The antifogging level at room temperature 5 ° C / water temperature 40 ° C and after 100 days was evaluated.

[Fog prevention performance test] A fog measurement house (only 330 × 290 × height 560) surrounded by a wooden board on only four sides
mm, the roof surface angle to the horizontal plane is 10 degrees), the film for evaluation is covered on the roof surface and the inside of the side surface, and the house is immersed in a constant temperature water bath maintained at 40 ° C. and left at room temperature of 25 ° C. for 24 hours. After that, put the thermostat in a thermostat at 5 ° C while keeping the thermostat at 40 ° C. In the house, a partition plate for adjusting the amount of water vapor supplied to the inside of the house is provided at the upper part of the water surface of the water tank, and this partition plate is adjusted so that the steam generated from the water surface of the water tank does not disturb the inner surface of the film. Set conditions that make it easy to observe fog generated from the vicinity. This fog generation situation
Observe visually 15 minutes later. This evaluation result was represented by the following criteria. (Evaluation rank) A: No fog is observed near the inner surface of the film. Δ: Slight fog generation from near the inner surface of the film is observed. X: Generation of fog from the vicinity of the inner surface of the film is observed. XX: Generation of a very large amount of fog is observed near the inner surface of the film.

[Whitening test] In order to test the blooming phenomenon due to the antifogging agent on the film surface, the film was heated at 40 ° C.
For 2 weeks, and the turbidity of the film was measured with a haze meter. The ranking of transparency obtained from now on is 5
Expressed in stages. (Transparency rank) Good ◎> ○ ＞ △ × ＞ ×× Bad.

Examples 1 to 11 Composition: Polyvinyl chloride resin (average degree of polymerization: 1300) 100 parts by weight Di-2-ethylhexyl phthalate 45 parts by weight (Kao Corporation, Vinicizer 80) Tricresyl phosphate 5 parts by weight (large) Hachi Chemical Industry Co., Ltd.) Stabilizer (Ba-Zn type) 1.5 parts by weight (Katsuta Kako Co., Ltd., BZ-330M) Stabilizer (Katsuda Kako Co., Ltd., PSE-1020B) 1.0 part by weight Epoxy resin (shell) , Epicoat 828) 1.5 parts by weight Methylene bisstearyl amide 0.3 parts by weight (Nippon Kasei Co., Ltd., bisamide LA) Antifogging antifog of the present invention (B) component 2.0 parts by weight (C) component 0.3 parts by weight The mixture was melt-kneaded for 7 minutes on a test roll having a surface temperature of 160 ° C., and then pressed at a temperature of 160 ° C. for 5 minutes to obtain a film having a thickness of 100 μm.
Used for anti-fog and transparency tests. Table 1 shows the formulation of the antifogging and antifog agent, and Table 2 shows the evaluation results.

Comparative Examples 1 to 3 For comparison, 3.0 parts by weight of sorbitan monopalmitate (Kao Corp., Leodol SP-P10) was used instead of the antifogging and antifog agent of the present invention having the composition shown in the examples. Film (Comparative Example 1), a film containing 0.3 part by weight of a fluorine-based surfactant (Unidyne DS-403) (Comparative Example 2), and a film containing no antifoggant or antifog (Comparative Example 3) ) Were tested.
Table 1 shows the formulation of the antifogging and antifog agent, and Table 2 shows the evaluation results.

[0055]

[Table 1]

[0056]

[Table 2]

Examples 12 to 19 Composition: Low-density polyethylene resin (LDPE) 100 parts by weight (melt index 1.3) Antifogging and antifog agent of the present invention (A) component + (B) component 1.5 parts by weight (C) component 0.3 Parts by weight First, a masterbatch of 5% by weight of an antifogging and antifog agent was prepared using a twin-screw extruder, and after that, the masterbatch and virgin pellets were mixed to adjust the above concentration to 80 μm using a T-die single screw extruder. A film having a thickness of 5 mm was formed and used for anti-fog, anti-fog and transparency tests. Table 3 shows the formulation of the antifogging and antifog agent, and Table 4 shows the evaluation results.

Comparative Examples 4 to 8 For comparison, sorbitan monopalmitate (Comparative Example 4) and polyoxyethylene (2) stearylamine monopoly were used instead of the antifogging and antifog agent of the present invention having the composition shown in the examples. A film in which 1.5 parts by weight of stearate (Comparative Example 5) is added, and a film in which 0.3 part by weight of a fluorinated surfactant (Unidyne DS-403) is further added to the films of Comparative Examples 4 and 5 (Comparative Example 6 and Comparative Example 5) Example 7) and a film (Comparative Example 8) to which no antifogging agent and antifogging agent were added were tested for antifogging property, antifogging property and transparency. Table 3 shows the formulation of the antifogging and antifog agent, and Table 4 shows the evaluation results.

[0059]

[Table 3]

[0060]

[Table 4]

Examples 20 to 24 Composition: Ethylene-vinyl acetate copolymer (EVA) resin 100 parts by weight (melt index 0.5, VA% = 5%) Antifogging antifog agent of the present invention (A) component + (B) ) Ingredient 1.5 parts by weight (C) Ingredient 0.3 parts by weight First, a 5% by weight antifogging and antifog master batch was prepared by a twin-screw extruder, and after that, the master batch and virgin pellets were mixed to prepare the above concentration. The film was formed into a film having a thickness of 80 μm using a T-die single screw extruder, and used for anti-fogging, anti-fog, and transparency tests. Table 5 shows the formulation of the antifogging and antifog agent, and Table 6 shows the evaluation results.

Comparative Examples 9 to 11 For comparison, a film prepared by adding 1.5 parts by weight of sorbitan monopalmitate in place of the antifogging and antifog agent of the present invention having the composition shown in the examples (Comparative Example 9), Fluorine-based surfactant (Unidyne DS-403) on film 9
The antifogging property, the antifogging property and the transparency test were performed on a film to which 0.3 part by weight was added (Comparative Example 10) and a film to which no antifogging agent and antifogging agent were added (Comparative Example 11). Table 5 shows the formulation of the antifogging and antifog agent, and Table 6 shows the evaluation results.

[0063]

[Table 5]

[0064]

[Table 6]

Examples 25 to 29 Composition: Linear low density polyethylene resin (LLDPE) 100 parts by weight (melt index 1.9) Antifogging and antifog agent of the present invention (A) component + (B) component 1.5 parts by weight (C ) Ingredient 0.3 parts by weight First, a 5% by weight antifogging and antifog masterbatch was prepared using a twin-screw extruder, and after that, the masterbatch and virgin pellets were mixed and adjusted to the above concentration to form a T-die single-screw extruder. A film having a thickness of 80 μm was formed on a machine and used for anti-fog, anti-fog, and transparency tests. Table 7 shows the formulation of the antifogging and antifog agent, and Table 8 shows the evaluation results.

Comparative Examples 12 to 14 For comparison, a film prepared by adding 1.5 parts by weight of sorbitan monopalmitate instead of the antifogging and antifog agent of the present invention having the composition shown in the Examples (Comparative Example 12), Fluorosurfactant (Unidyne DS-403) is further added to film 12
The antifogging property, the antifogging property and the transparency test were performed on a film to which 0.3 parts by weight were added (Comparative Example 13) and a film to which no antifogging agent and antifogging agent were added (Comparative Example 14). Table 7 shows the formulation of the antifogging and antifog agent, and Table 8 shows the evaluation results.

[0067]

[Table 7]

[0068]

[Table 8]

Examples 30 to 32 Outer layer composition: 100 parts by weight of ethylene-vinyl acetate copolymer (EVA) resin (melt index 0.5, VA% = 5%) Antifogging and antifog agent of the present invention (A) component + ( Component (B) 0.5 part by weight Component (C) 0.1 part by weight Inner layer composition: 100 parts by weight of ethylene-vinyl acetate copolymer (EVA) resin (melt index 1.5, VA% = 15%) Component (A) + Component (B) 2.5 parts by weight Component (C) 0.5 parts by weight With the above composition, kneaded and pelletized outside the twin screw extruder in advance, and then, using the pellets, using a three-layer inflation molding machine. 100 μm (outer layer / inner layer / outer layer = 20
μm / 60 μm / 20 μm). The film was tested for anti-fog, anti-fog and transparency. Table 9 shows the formulation of the antifogging and antifog agent, and Table 10 shows the evaluation results.

Comparative Example 15 For comparison, sorbitan monopalmitate was used in the inner layer instead of the antifogging and antifog agent of the present invention having the composition shown in the examples.
A film (Comparative Example 15) in which 2.5 parts by weight and 0.5 parts by weight were added to the outer layer portion was subjected to a test for antifogging property, antifogging property and transparency. Table 9 shows the formulation of the antifogging and antifog agent, and Table 10 shows the evaluation results.

[0071]

[Table 9]

[0072]

[Table 10]

Examples 33 to 35 Outer layer composition: 100 parts by weight of low density polyethylene (LDPE) resin (melt index: 0.8) Antifogging and antifog agent of the present invention (A) component + (B) component 0.5 part by weight (C) component 0.1 part by weight Inner layer composition: 100 parts by weight of ethylene-vinyl acetate copolymer (EVA) resin (melt index 1.5 VA% = 15%) Antifogging and antifog agent of the present invention 2.5 parts by weight of component (A) + (B) (C) Component 0.5 parts by weight With the above composition, kneaded and pelletized outside the twin screw extruder in advance, and then, using the pellet, using a three-layer inflation molding machine, 100 μm (outer layer / inner layer / outer layer = 20)
μm / 60 μm / 20 μm). The film was tested for anti-fog, anti-fog and transparency. Table 11 shows the formulation of the antifogging and antifog agent, and Table 12 shows the evaluation results.

Comparative Example 16 For comparison, sorbitan monopalmitate was used in the inner layer instead of the antifogging and antifog agent of the present invention having the composition shown in the examples.
The film (Comparative Example 16) in which 2.5 parts by weight and 0.5 part by weight were added to the outer layer portion was subjected to antifogging property, antifogging property and transparency test. Table 11 shows the formulation of the antifogging and antifog agent, and Table 12 shows the evaluation results.

[0075]

[Table 11]

[0076]

[Table 12]

Examples 36 to 38 Outer layer composition: 100 parts by weight of linear low density polyethylene (LLDPE) resin (melt index 0.7) Antifogging and antifog agent of the present invention 0.5% by weight of component (A) + component (B) Component (C) 0.1 part by weight Inner layer composition: 100 parts by weight of ethylene-vinyl acetate copolymer (EVA) resin (melt index 1.5 VA% = 15%) Antifogging and antifog agent of the present invention (A) component + (B) component 2.5 parts by weight (C) component 0.5 parts by weight With the above composition, kneaded in advance outside the twin-screw extruder and pelletized, and then, using the pellet, 100 μm (outer layer / inner layer / outer layer = 20
μm / 60 μm / 20 μm). The film was tested for anti-fog, anti-fog and transparency. Table 13 shows the formulation of the antifogging and antifog agent, and Table 14 shows the evaluation results.

Comparative Example 17 For comparison, sorbitan monopalmitate was used in the inner layer instead of the antifogging and antifog agent of the present invention having the composition shown in the examples.
The film (Comparative Example 17) in which 2.5 parts by weight and 0.5 part by weight were added to the outer layer portion was tested for antifogging property, antifogging property and transparency. Table 13 shows the formulation of the antifogging and antifog agent, and Table 14 shows the evaluation results.

[0079]

[Table 13]

[0080]

[Table 14]

──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical indication location C08L 23/00 KEG C08L 23/00 KEG 101/00 101/00 C09K 3/18 C09K 3/18

Claims (9)

[Claims] (A) The following general formula (1): (Wherein, R ₁ is an alkyl group, alkenyl group, or acyl group having 12 to 22 carbon atoms, and m and n are one or more numbers such that m + n = 2 to 10 (average value)) A compound (hereinafter referred to as compound (1)) or a fatty acid ester of compound (1) (provided that the fatty acid is a saturated or unsaturated fatty acid having 12 to 22 carbon atoms, and 0.5% of two hydroxyl groups of compound (1))
(B) a fatty acid ester of a polyhydric alcohol having 2 to 18 carbon atoms (provided that the fatty acid is a saturated or unsaturated fatty acid having 12 to 22 carbon atoms) or Alkylene oxide adduct of the fatty acid ester (provided that the alkylene oxide has 2 to 3 carbon atoms, and the average number of moles added is 1 mole of the fatty acid ester;
0.1 to 20 mol), and (C) the following general formula (2): (Wherein R ₂ and R ₃ are a straight or branched alkyl group having 5 to 16 carbon atoms) or a fatty acid ester of compound (1) (wherein the fatty acid is A fatty acid represented by the general formula (2), wherein 0.5 to 2.0 of two hydroxyl groups of the compound (1) form an ester bond with the fatty acid) in a weight ratio of [(A) + (B )] / (C) = 50
/ 50-98 / 2 and (A) / (B) = 100 / 0-0 / 10
An antifogging and antifog agent for synthetic resins containing 0%. 2. A synthetic resin composition comprising 0.1 to 5 parts by weight of the antifogging and antifog agent according to claim 1 based on 100 parts by weight of the synthetic resin. 3. A synthetic resin composition comprising 0.5 to 4 parts by weight of the antifoggant / antifog of claim 1 based on 100 parts by weight of the synthetic resin. 4. An agricultural film comprising the synthetic resin composition according to claim 2. 5. An agricultural film comprising the synthetic resin composition according to claim 3. 6. An agricultural film comprising at least one layer comprising the film comprising the synthetic resin composition according to claim 2. Description: 7. An agricultural film comprising at least one layer comprising the film comprising the synthetic resin composition according to claim 3. Description: (A) The following general formula (1): (Wherein, R ₁ is an alkyl group, alkenyl group, or acyl group having 12 to 22 carbon atoms, and m and n are 1 or more in which m + n = 2 to 10 (average value)) A compound (hereinafter, referred to as compound (1)) or a fatty acid ester of compound (1) (where the fatty acid is a saturated or unsaturated fatty acid having 12 to 22 carbon atoms, and 0.5% of the two hydroxyl groups of compound (1))
(B) forms a fatty acid ester of a polyhydric alcohol having 2 to 18 carbon atoms (provided that the fatty acid is a saturated or unsaturated fatty acid having 12 to 22 carbon atoms) or Alkylene oxide adduct of the fatty acid ester (provided that the alkylene oxide has 2 to 3 carbon atoms, and the average number of moles added is 1 mole of the fatty acid ester;
0.1 to 20 mol), and (C) the following general formula (2): (Wherein R ₂ and R ₃ are a straight or branched alkyl group having 5 to 16 carbon atoms) or a fatty acid ester of compound (1) (wherein the fatty acid is A fatty acid represented by the general formula (2), wherein 0.5 to 2.0 of two hydroxyl groups of the compound (1) form an ester bond with the fatty acid) in a weight ratio of [(A) + (B )] / (C) = 70
/ 30-90 / 5 and (A) / (B) = 100 / 0-10 / 90
The agricultural film according to any one of claims 4 to 7, comprising an antifogging and antifog agent contained at a ratio of: and wherein the synthetic resin is a polyolefin-based resin. 9. In the branched higher fatty acid or fatty acid ester used for the component (C), R ₂ and R ₃ in the general formula (2) are each a branched alkyl group having two or more methyl groups. The agricultural film according to claim 8.