JP2005263826A - Agricultural sunproofing agent - Google Patents
Agricultural sunproofing agent Download PDFInfo
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- JP2005263826A JP2005263826A JP2004073860A JP2004073860A JP2005263826A JP 2005263826 A JP2005263826 A JP 2005263826A JP 2004073860 A JP2004073860 A JP 2004073860A JP 2004073860 A JP2004073860 A JP 2004073860A JP 2005263826 A JP2005263826 A JP 2005263826A
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- 239000011248 coating agent Substances 0.000 claims abstract description 71
- 238000000576 coating method Methods 0.000 claims abstract description 71
- 239000011347 resin Substances 0.000 claims abstract description 48
- 229920005989 resin Polymers 0.000 claims abstract description 48
- 239000000126 substance Substances 0.000 claims abstract description 46
- 239000002245 particle Substances 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000000839 emulsion Substances 0.000 claims abstract description 27
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 25
- 239000002253 acid Substances 0.000 claims abstract description 14
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 12
- 239000007787 solid Substances 0.000 claims abstract description 9
- 239000003125 aqueous solvent Substances 0.000 claims description 5
- 239000012530 fluid Substances 0.000 abstract 4
- 239000012736 aqueous medium Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 7
- 229920000178 Acrylic resin Polymers 0.000 description 6
- 239000004925 Acrylic resin Substances 0.000 description 6
- 239000003973 paint Substances 0.000 description 6
- 238000005507 spraying Methods 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 235000011941 Tilia x europaea Nutrition 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 239000003513 alkali Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000004571 lime Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000003960 organic solvent Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- 229910010272 inorganic material Inorganic materials 0.000 description 3
- 239000011147 inorganic material Substances 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 3
- 229920002554 vinyl polymer Polymers 0.000 description 3
- 239000012463 white pigment Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 229910052570 clay Inorganic materials 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- 235000010215 titanium dioxide Nutrition 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 125000002843 carboxylic acid group Chemical group 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- WVDDGKGOMKODPV-ZQBYOMGUSA-N phenyl(114C)methanol Chemical compound O[14CH2]C1=CC=CC=C1 WVDDGKGOMKODPV-ZQBYOMGUSA-N 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920005596 polymer binder Polymers 0.000 description 1
- 239000002491 polymer binding agent Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920006264 polyurethane film Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
Abstract
Description
本発明は、ハウス栽培あるいはトンネル栽培に使用する農業用フィルムに適用する遮光塗布液に関する。 The present invention relates to a light-shielding coating solution applied to an agricultural film used for house cultivation or tunnel cultivation.
ハウス栽培あるいはトンネル栽培に関し、農業用フィルムハウス内で栽培される作物にとって、透過する太陽光線が強すぎ、作物に焼けなどの悪影響を与える場合がある。特に夏場の作物の焼けを防止するため、石灰などの無機物を水に分散させ、農業用ハウスフィルム吹きかけて石灰などの無機物の皮膜を形成させ、遮光するという手段、あるいは遮光ネット（シート）を農業用ハウスに被覆し、遮光する手段が採用されてきている。 Regarding house cultivation or tunnel cultivation, the transmitted sunlight is too strong for crops cultivated in an agricultural film house, which may adversely affect the crops such as burning. In particular, in order to prevent burning of crops in summer, lime and other inorganic substances are dispersed in water and sprayed with an agricultural house film to form a film of inorganic substances such as lime, or a shading net (sheet) is farmed. Means for covering a house and shielding it from light have been adopted.
しかしながら、例えば、石灰などの無機物の皮膜を形成させて、遮光するという方法では、フィルム上に均一に皮膜を塗布することが困難であり、また、石灰などの無機物の皮膜が脆いため、長時間維持できず、雨が降ると簡単に流れ落ちてしまう等の欠点があった。また、遮光ネット（シート）を農業用ハウスに被覆する方法では、遮光ネットの設置ならびに取り外しが簡単に行うことができず、労力を必要とする欠点があった。 However, for example, in the method of forming an inorganic film such as lime and shielding the light, it is difficult to uniformly coat the film on the film, and since the inorganic film such as lime is fragile, There were drawbacks such as being unable to maintain and easily flowing down when it rained. Further, in the method of covering the shading net (sheet) on the agricultural house, the shading net cannot be easily installed and removed, and there is a drawback that requires labor.
そこで、最近になって、顔料含有の遮光用ペイント（遮光塗料）を農業用フィルムにスプレーで散布・塗布し、フィルム上に遮光塗膜を形成させ、遮光を行う方法が提案されている（特許文献１）。この農業用フィルムに遮光ペイントを散布・塗布する方法にあっては、特定の粘度に調整した顔料含有の白色水性エマルジョン塗料を使用するものであり、フィルム上への遮光塗膜の形成は優れたものである。 Therefore, recently, a method has been proposed in which a pigment-containing light-shielding paint (light-shielding paint) is sprayed and applied to an agricultural film by spraying to form a light-shielding coating film on the film, thereby shielding light (Patent) Reference 1). In the method of spraying and applying the shading paint to this agricultural film, a pigment-containing white aqueous emulsion paint adjusted to a specific viscosity is used, and the formation of the shading coating film on the film is excellent. Is.
しかしながら、この遮光塗布膜が不要になった場合には塗布した遮光塗料を除去しなければならないが、これら塗布膜を形成するエマルジョン塗料自体は、不要時の除去を可能とする処方で配合されているものではない。したがって、例えば、冬場においてハウス内に太陽光線の透過を必要とする場合には、界面活性剤を含有する強力な除去液あるいは有機溶媒等で遮光塗膜を除去するか、新たな農業用フィルムを展張する必要があった。
したがって本発明は、上記問題点に鑑み、農業用フィルムへ塗布する遮光塗布液として、農業用ハウス等に白色顔料である無機物の皮膜を形成させ遮光を行う場合に、雨などにより簡単に流れ落ちることがないよう、遮光塗膜に耐水性を持続させると共に、不要となったときは、除去液にて簡単に除去し得る遮光塗布液を提供することを課題とする。 Therefore, in view of the above problems, the present invention can easily flow down due to rain or the like when a light-shielding coating solution applied to an agricultural film is shielded from light by forming an inorganic film as a white pigment on an agricultural house or the like. It is an object of the present invention to provide a light-shielding coating solution that maintains water resistance of the light-shielding coating film and that can be easily removed with a removing solution when it is no longer needed.
かかる課題を解決するべく鋭意検討した結果、農業用ハウスに被覆する無機皮膜として、樹脂エマルジョンをバインダーとして使用し、そこに粒子径の異なる２種類の無機物を配合し、使用した場合に、形成された遮光塗膜は、雨などの水に対して耐水性があり、また不要となった場合には、アルカリ除去液で簡単に除去し得る遮光塗布液が得られることを確認し、本発明を完成させるに至った。 As a result of diligent studies to solve such problems, it is formed when an inorganic film to be coated on an agricultural house is used when a resin emulsion is used as a binder and two kinds of inorganic substances having different particle diameters are blended and used. The light-shielding coating film was water resistant to water such as rain, and when it became unnecessary, it was confirmed that a light-shielding coating liquid that can be easily removed with an alkali removing liquid was obtained. It came to complete.
したがって本発明は、その基本的態様としては、無機物、樹脂エマルジョン、水性溶媒として水からなる遮光塗布液であって、樹脂分と無機物の比が、固形分比で１：０．３〜１：１５であり、無機物として平均粒子径１μｍ未満の無機物および平均粒子径１μｍ以上の無機物である２種類の無機物を使用すると共に、平均粒子径１μｍ未満の無機物：平均粒子径１μｍ以上の無機物の比が、１：０．５〜２の範囲内であることを特徴とする遮光塗布液である。 Accordingly, the basic aspect of the present invention is a light-shielding coating solution comprising an inorganic substance, a resin emulsion, and water as an aqueous solvent, wherein the ratio of the resin component to the inorganic substance is 1: 0.3 to 1: 15 and two inorganic substances having an average particle diameter of less than 1 μm and an inorganic substance having an average particle diameter of 1 μm or more are used, and the ratio of the inorganic substance having an average particle diameter of less than 1 μm to the inorganic substance having an average particle diameter of 1 μm or more is 15 1: A light-shielding coating solution characterized by being in the range of 0.5-2.
また、より具体的な本発明は、樹脂エマルジョンとして、樹脂分が酸価３０以上の樹脂エマルジョンであり、エマルジョン中の樹脂の平均粒径が０．０１〜０．５μｍであることを特徴とする上記の遮光塗布液である。 The more specific present invention is a resin emulsion having a resin content of an acid value of 30 or more as the resin emulsion, and the average particle size of the resin in the emulsion is 0.01 to 0.5 μm. It is said light-shielding coating liquid.
本発明においては、塗布液中に含有される平均粒子径の異なる２種類の無機物としては、例えば、チタン白、酸化チタン、炭酸カルシウム、タルク、クレー、シリカ、マイカ、硫酸バリウム等をあげることができるが、なかでも炭酸カルシウムが好結果を与えた。したがって、より好ましい具体的な本発明は、無機物が炭酸カルシウムであり、平均粒子径１μｍ未満の炭酸カルシウム：平均粒子径１μｍ以上の炭酸カルシウムの比が、１：０．５〜２の範囲内である上記の遮光塗布液である。 In the present invention, examples of the two kinds of inorganic substances having different average particle diameters contained in the coating liquid include titanium white, titanium oxide, calcium carbonate, talc, clay, silica, mica, and barium sulfate. Among them, calcium carbonate gave good results. Therefore, in a more preferred specific embodiment of the present invention, the inorganic substance is calcium carbonate, and the ratio of calcium carbonate having an average particle diameter of less than 1 μm: calcium carbonate having an average particle diameter of 1 μm or more is in the range of 1: 0.5 to 2. This is a certain light-shielding coating solution.
本発明は、特に、遮光塗布液成分として、樹脂エマルジョン、平均粒子径の異なる２種類の無機物、水性溶媒である水を使用し、さらに樹脂分と無機物の比を固形分比で特定の反内になるようにしたものであるが、そのなかでも特に平均粒子径の異なる無機物を一定の比率で使用することにより、得られる遮光塗布膜に耐水性が付与される。したがって、降雨などによっても無機物の皮膜が流されることなく、長期間に亘って遮光効果を得ることができる。また、遮光塗膜が不要となった場合には、有機溶媒を使用することなく、アルカリ除去液にて簡単に除去し得るものである。 In particular, the present invention uses a resin emulsion, two types of inorganic substances having different average particle diameters, and water, which is an aqueous solvent, as the light-shielding coating liquid component, and further determines the ratio of the resin component and the inorganic substance in a specific content ratio by the solid content ratio. Among them, water resistance is imparted to the obtained light-shielding coating film by using inorganic substances having different average particle diameters at a certain ratio. Therefore, a light-shielding effect can be obtained over a long period of time without causing an inorganic film to flow due to rainfall or the like. Moreover, when a light shielding coating film becomes unnecessary, it can be easily removed with an alkali removing solution without using an organic solvent.
本発明が提供する遮光塗布液中に含有される、遮光性を確保するために添加される無機物は、いわゆる白色顔料としてのチタン白、酸化チタン、炭酸カルシウム、タルク、クレー、シリカ、マイカ、硫酸バリウム等をあげることができる。本発明は、これらの無機物については、その平均粒子径が異なる２種類の無機物を組合せ配合することがよいことが判明した。 The inorganic substance added in order to ensure light-shielding properties contained in the light-shielding coating solution provided by the present invention is titanium white, titanium oxide, calcium carbonate, talc, clay, silica, mica, sulfuric acid as a so-called white pigment. Barium etc. can be raised. In the present invention, it has been found that it is preferable to combine and blend two kinds of inorganic substances having different average particle diameters.
特に、その粒子径の相違は、１μｍを基準として平均粒子径が１μｍ未満の無機物および平均粒子径が１μｍ以上の無機物の２種類を組合せ使用するのがよいことが判明した。平均粒子径が１μｍ未満の無機物は、バインダーである樹脂エマルジョンと共に農業用ハウスフィルムに塗布された場合には、樹脂中へ微細な粒子状としての分散していることからフィルム上に強固な無機物皮膜を形成し、その耐水性を向上し得る。しかしながら、不要となった場合の除去性に難点がある。 In particular, it has been found that the difference in particle diameter is preferably a combination of two types of inorganic substances having an average particle diameter of less than 1 μm and an inorganic substance having an average particle diameter of 1 μm or more based on 1 μm. When an inorganic substance having an average particle size of less than 1 μm is applied to an agricultural house film together with a resin emulsion as a binder, it is dispersed as fine particles in the resin, so a strong inorganic film on the film And the water resistance can be improved. However, there is a difficulty in removability when it becomes unnecessary.
一方、平均粒子径が１μｍ以上の無機物は、バインダーである樹脂エマルジョンと共に農業用ハウスフィルムに塗布された場合には、耐水性が乏しいものとなる。したがって本発明においては、この両者を混合使用することにより、耐水性と除去性に調和を持たせたものである。本発明者らの検討の結果、農業用の遮光塗布液としての耐水性と除去性を確保するためには、平均粒子径１μｍ未満の無機物：平均粒子径１μｍ以上の無機物の比が、１：０．５〜２の範囲内であるのがよいことが判明した。 On the other hand, an inorganic substance having an average particle diameter of 1 μm or more has poor water resistance when applied to an agricultural house film together with a resin emulsion as a binder. Therefore, in the present invention, the water resistance and the removability are harmonized by using both of them together. As a result of the study by the present inventors, in order to ensure water resistance and removability as an agricultural light-shielding coating solution, the ratio of inorganic substance having an average particle diameter of less than 1 μm: inorganic substance having an average particle diameter of 1 μm or more is 1: It has been found that it should be in the range of 0.5-2.
すなわち、平均粒子径１μｍ未満の無機物と平均粒子径１μｍ以上の無機物の配合比が０．５未満である場合には、農業用の遮光塗布液としての耐水性が十分ではなく、また２を超える場合には、耐水性は十分なものであるが、除去性が十分でない。
これらの平均粒子径の異なる無機物としては、上記した各種の白色顔料をあげることができるが、そのなかでも炭酸カルシウムを使用することで好結果を与えた。
That is, when the blending ratio of the inorganic substance having an average particle diameter of less than 1 μm and the inorganic substance having an average particle diameter of 1 μm or more is less than 0.5, the water resistance as an agricultural light-shielding coating solution is not sufficient, and exceeds 2. In some cases, the water resistance is sufficient, but the removability is not sufficient.
Examples of these inorganic substances having different average particle diameters include the above-mentioned various white pigments. Among them, the use of calcium carbonate gave good results.
本発明にあっては、かかる平均粒子径の異なる無機物の含有量としては、遮光剤として所望の遮光効果を発揮し得る量であればよいが、バインダーとしての樹脂エマルジョン中への分散性を考慮した場合、樹脂分と無機物の比が固形分比で１：０．３〜１：１５であるのがよいことが判明した。すなわち、無機物の配合比が０．３に満たない場合には所望の遮光効果を得ることが困難となり、また１５を超えて添加してもそれ以上の遮光効果が得られず、かえって不経済であり、さらに遮光塗布液をスプレー塗布する際に目詰まりを生じ易く、好ましいものではない。 In the present invention, the content of the inorganic substances having different average particle diameters may be an amount that can exhibit a desired light-shielding effect as a light-shielding agent, but the dispersibility in a resin emulsion as a binder is considered. In this case, it was found that the ratio of the resin content to the inorganic material should be 1: 0.3 to 1:15 in terms of solid content. That is, when the inorganic compounding ratio is less than 0.3, it is difficult to obtain a desired light-shielding effect, and even if added in excess of 15, a further light-shielding effect cannot be obtained, which is uneconomical. Furthermore, clogging tends to occur when the light-shielding coating solution is applied by spraying, which is not preferable.
また、本発明が提供する農業用フィルムに適用する遮光塗布液においては、遮光塗布液中に含有される樹脂としては、フィルム上に塗布された遮光塗布液が乾燥し、無機物を均一に保持するバインダーとしての樹脂膜を形成するものである樹脂が使用される。 Moreover, in the light-shielding coating liquid applied to the agricultural film provided by the present invention, as the resin contained in the light-shielding coating liquid, the light-shielding coating liquid applied on the film dries and holds the inorganic substance uniformly. A resin that forms a resin film as a binder is used.
当該樹脂としては、その酸価が３０以上である水性樹脂エマルジョンを使用するのがよい。そのような水分散性の樹脂としては、アクリル系樹脂、ウレタン系樹脂、ビニル系樹脂、ポリエステル系樹脂、エポキシ系樹脂等をあげることができるが、なかでも特に酸価が３０以上を有する水分散性アクリル系樹脂、水分散性ウレタン系樹脂が好ましく使用される。 As the resin, it is preferable to use an aqueous resin emulsion having an acid value of 30 or more. Examples of such water-dispersible resins include acrylic resins, urethane resins, vinyl resins, polyester resins, epoxy resins, and the like, and in particular, water dispersions having an acid value of 30 or more. An acrylic resin and a water-dispersible urethane resin are preferably used.
この酸価は、ポリマー系バインダーについて、１連鎖あたりの遊離カルボン酸基の平均数と関係するものであり、酸価が大きなものであればあるほど、耐水性がなくなり水に溶けやすくなる。また、酸価が小さなものであれば、水に溶けにくい性質を有している。本発明にあっては、水性樹脂エマルジョンとして、樹脂成分が、その酸価が３０以上のものを使用し、ある程度の耐水性を確保し、必要とされる遮光塗布膜の保持期間を満たすことができる。酸価が３０未満であると形成された塗膜は耐水性には問題ないが、除去性の面で塗膜が除去液で容易に除去できなくなり、好ましくない。 This acid value is related to the average number of free carboxylic acid groups per chain for the polymer binder, and the higher the acid value, the less water resistance and the easier it is to dissolve in water. Moreover, if it has a small acid value, it has the property of being hardly soluble in water. In the present invention, as the aqueous resin emulsion, a resin component having an acid value of 30 or more is used to ensure a certain level of water resistance and satisfy a required light-shielding coating film retention period. it can. A coating film formed with an acid value of less than 30 is not preferred in terms of water resistance, but it is not preferable in terms of removability because the coating film cannot be easily removed with a remover.
また、樹脂エマルジョンとしての樹脂の平均粒径が０．０１〜０．５μｍであることが好ましい。平均粒径が０．０１μｍに満たない場合にはエマルジョンとしての機能を発揮できず、また０．５μｍを超える場合には、フィルム上に塗布した樹脂が流れてしまい好ましいものではない。 Moreover, it is preferable that the average particle diameter of resin as a resin emulsion is 0.01-0.5 micrometer. When the average particle size is less than 0.01 μm, the function as an emulsion cannot be exhibited, and when it exceeds 0.5 μm, the resin coated on the film flows, which is not preferable.
本発明が提供する遮光塗布液中における当該樹脂エマルジョンの含有量は、配合する無機物との配合比との兼ね合いがあるが、水１００重量部に対して、樹脂固形分として０．１〜１０重量部添加するのがよい。０．１重量部未満であるとフィルム上への塗膜の形成が不十分なものとなり、また１０重量部を超える場合には、塗布作業性が低下するとともに、塗布後の乾燥に時間がかかり、それに反して塗膜の持続性はそれほど向上せず経済的ではない。 The content of the resin emulsion in the light-shielding coating solution provided by the present invention has a balance with the blending ratio with the inorganic substance to be blended, but is 0.1 to 10 weight as the resin solid content with respect to 100 parts by weight of water. It is better to add a part. If the amount is less than 0.1 parts by weight, the formation of the coating film on the film becomes insufficient. If the amount exceeds 10 parts by weight, the coating workability is deteriorated and it takes time to dry after coating. On the other hand, the durability of the coating film is not improved so much and is not economical.
本発明の遮光塗布液には、上記した白色顔料、特に炭酸カルシウムの他に、必要に応じて、さらに硬化剤、防腐剤、増粘剤、減粘剤、分散剤、界面活性剤、酸化防止剤、紫外線吸収剤、光安定剤、アルコール類等を添加することができる。 In addition to the above-mentioned white pigment, particularly calcium carbonate, the light-shielding coating solution of the present invention may further include a curing agent, preservative, thickener, thickener, dispersant, surfactant, and antioxidant as necessary. An agent, an ultraviolet absorber, a light stabilizer, alcohols and the like can be added.
なお、本発明が提供する遮光塗布液が適用し得る農業フィルムとしては、従来から農業用フィルムとして用いられているものを、いずれも使用することができる。そのようなフィルムの材質としては、例えば、ポリ塩化ビニルフィルム、ポリエステルフィルム、アクリル樹脂系フィルム、ポリエチレン系フィルム、ポリプロピレンフィルム、ポリウレタンフィルム、ガラス、酢酸ビニル系フィルム等を挙げることができる。 In addition, as an agricultural film which can apply the light-shielding coating liquid provided by the present invention, any film conventionally used as an agricultural film can be used. Examples of such a film material include a polyvinyl chloride film, a polyester film, an acrylic resin film, a polyethylene film, a polypropylene film, a polyurethane film, glass, and a vinyl acetate film.
かかる農業用フィルムに対する本発明の遮光塗布液の塗布量は、固形分として０．１〜５０ｇ／ｍ２程度が好ましい。０．１ｇ／ｍ２未満であると、充分な遮光効果を得ることができない。また５０ｇ／ｍ２を超える場合には、塗工作業中に農業用フィルムから樹脂の落滴が生じ、好ましいものではない。 The coating amount of the light-shielding coating solution of the present invention on such an agricultural film is preferably about 0.1 to 50 g / m 2 as a solid content. If it is less than 0.1 g / m 2 , a sufficient light shielding effect cannot be obtained. On the other hand, if it exceeds 50 g / m 2 , the resin drops from the agricultural film during the coating operation, which is not preferable.
かくして、本発明の平均粒子径の異なる２種類の無機物、３０以上の酸価を有する樹脂エマルジョンおよび水性溶媒として水を含有する遮光塗布液は、農業用フィルム上にスプレー散布あるいは塗布されて、耐水性に優れた無機物の塗膜を形成し、簡便にその遮光効果を得ることができる。
一方、その遮光塗膜が不要となったときには、有機溶媒を多量に使用することなく、アルカリ除去液にて簡単に除去し得るものである。
Thus, the two types of inorganic substances having different average particle diameters of the present invention, a resin emulsion having an acid value of 30 or more, and a light-shielding coating solution containing water as an aqueous solvent are spray-sprayed or applied onto agricultural films, An inorganic coating film having excellent properties can be formed, and the light shielding effect can be easily obtained.
On the other hand, when the light-shielding coating film becomes unnecessary, it can be easily removed with an alkali removing solution without using a large amount of an organic solvent.
以下に本発明を実施例および比較例により、より詳細に説明するが、本発明はこれらの実施例に限定されるものではない。 EXAMPLES The present invention will be described in more detail with reference to examples and comparative examples below, but the present invention is not limited to these examples.
実施例１〜８：
下記表１に記載の処方（重量部）により、本発明の遮光塗布液を得た。得られた遮光塗布液を農業用ビニルハウスフィルムにスプレー塗工し、その塗膜の状態、塗膜の耐水性および除去性を一定の基準により評価し、その結果をあわせて表１中に示した。
Examples 1-8:
The light-shielding coating solution of the present invention was obtained according to the formulation (parts by weight) shown in Table 1 below. The obtained light-shielding coating solution is spray-coated on an agricultural vinyl house film, and the state of the coating film, water resistance and removability of the coating film are evaluated according to certain standards, and the results are also shown in Table 1. It was.
＊１：無機物１：平均粒子径１μｍ未満
炭酸カルシウム（丸尾カルシウム社製；ルミナス；平均粒子径０．１μｍ）
＊２：無機物２：平均粒子径１μｍ以上
炭酸カルシウム（白石カルシウム社製；赤玉；平均粒子径２〜３μｍ）
＊３：樹脂分Ａ：アクリル系樹脂エマルジョン；酸価６０；固形分４７％；樹脂平均粒径０．０９μｍ；分子量２０万以上
＊４：樹脂分Ｂ：アクリル系樹脂エマルジョン；酸価２００；固形分３２％；樹脂平均粒径０．１６μｍ；分子量２０万以上
＊５：樹脂分Ｃ：アクリル系樹脂エマルジョン；酸価１０；固形分３０％；樹脂平均粒径１μｍ；分子量２０万以上
* 1: Inorganic substance 1: Average particle diameter of less than 1 μm Calcium carbonate (Maruo Calcium Co., Ltd .; Luminous; Average particle diameter of 0.1 μm)
* 2: Inorganic substance 2: Average particle diameter of 1 μm or more Calcium carbonate (manufactured by Shiraishi Calcium Co .; Akadama; average particle diameter of 2 to 3 μm)
* 3: Resin content A: acrylic resin emulsion; acid value 60; solid content 47%; resin average particle size 0.09 μm; molecular weight 200,000 or more * 4: resin content B: acrylic resin emulsion; acid value 200; Resin average particle size 0.16 μm; Molecular weight 200,000 or more * 5: Resin content C: Acrylic resin emulsion; Acid value 10; Solid content 30%; Resin average particle size 1 μm;
＊６：塗膜の状態については、以下の測定により評価した。
遮光塗布液を塗布し、塗膜を形成させ乾燥した後、塗膜表面を指で擦り、塗膜の剥げ状態を目視により以下の基準で判定した。
◎：全く変化がない。
○：若干剥げ落ちるが、問題ない。
□：若干剥げ落ちる。
△：かなり剥げ落ちる。
×：すべて剥げ落ちる。
* 6: The state of the coating film was evaluated by the following measurement.
After the light-shielding coating solution was applied, a coating film was formed and dried, the surface of the coating film was rubbed with a finger, and the peeled state of the coating film was visually determined according to the following criteria.
A: No change at all.
○: Slightly peeled off, but no problem.
□: Slightly peels off.
(Triangle | delta): It peels off considerably.
X: All peeled off.
＊７：耐水性は、遮光塗布液を農業用フィルムに吹付け乾燥後、水に１２時間浸漬させた後取り出し、塗膜表面を指で擦り、塗膜の剥げ状態を目視により以下の基準で判定した。
◎：全く変化がない。
○：若干剥げ落ちるが、問題ない。
□：若干剥げ落ちる。
△：かなり剥げ落ちる。
×：すべて剥げ落ちる。
* 7: Water resistance is determined by spraying the light-shielding coating solution onto an agricultural film, drying it, immersing it in water for 12 hours, taking it out, rubbing the surface of the coating film with your finger, and visually checking the peeling condition of the coating film according to the following criteria. Judged.
A: No change at all.
○: Slightly peeled off, but no problem.
□: Slightly peels off.
(Triangle | delta): It peels off considerably.
X: All peeled off.
＊８：除去性は、遮光塗布液を農業用フィルムに吹付け乾燥後、除去液として、水１００重量部、水酸化ナトリウム０．５重量部、ベンジルアルコール１０重量部、ドデシルベンゼンスルホン酸ナトリウム０．２重量部からなる除去液をフィルムに吹付け、吹付け５分後にさらに水を吹付けた時の塗膜の落とし易さを、目視により以下の基準で判定した。
◎：すべて落ちる。
○：若干残るが問題ない。
□：少し残る。
△：多く残る。
×：全く落ちない。
* 8: Removability is as follows: after spraying a light-shielding coating solution onto an agricultural film and drying, 100 parts by weight of water, 0.5 parts by weight of sodium hydroxide, 10 parts by weight of benzyl alcohol, sodium dodecylbenzenesulfonate 0 The removal liquid consisting of 2 parts by weight was sprayed onto the film, and the ease of dropping the coating film when visually sprayed with water after 5 minutes of spraying was visually determined according to the following criteria.
A: All fall.
○: Slightly remaining, but no problem.
□: A little remains.
Δ: Many remain.
X: It does not fall at all.
比較例１〜７：
上記実施例と同様に、下記表２に記載の処方（重量部）により、比較例の遮光塗布液を得た。得られた遮光塗布液を農業用ビニルハウスフィルムにスプレー塗工し、その塗膜の状態、塗膜の耐水性および除去性を一定の基準により評価し、その結果をあわせて表中に示した。
Comparative Examples 1-7:
In the same manner as in the above Examples, a light-shielding coating solution of Comparative Example was obtained by the formulation (parts by weight) shown in Table 2 below. The obtained light-shielding coating solution was spray-coated on an agricultural vinyl house film, and the state of the coating film, water resistance and removability of the coating film were evaluated according to certain criteria, and the results are also shown in the table. .
表中の＊１〜＊８は表１と同様である。 * 1 to * 8 in the table are the same as in Table 1.
以上の実施例１〜８および比較例１〜７の結果からも明らかなように、本発明の遮光塗布液は、農業用フィルムへの塗布することで、良好な遮光性が得られ、吹付けされた塗膜の状態も良好であり、耐水性とその除去性に優れたものであることが理解される。 As is clear from the results of Examples 1 to 8 and Comparative Examples 1 to 7 described above, the light-shielding coating solution of the present invention can be applied to agricultural films to obtain good light-shielding properties and spray. It is understood that the state of the coated film is also good, and is excellent in water resistance and removability.
以上記載したように、本発明のハウス栽培あるいはトンネル栽培に使用する農業用フィルムに適用する遮光塗布液は、樹脂エマルジョン、平均粒子径の異なる２種類の無機物、水性溶媒である水を使用し、さらに樹脂分と無機物の比を固形分比で特定の範囲内になるようにしたものであるが、そのなかでも特に平均粒子径の異なる無機物を一定の比率で使用することにより、得られる遮光塗布膜に耐水性が付与されている。したがって、降雨などによっても無機物の皮膜が流されることなく、長期間に亘って遮光効果を得ることができる。また、遮光塗膜が不要となった場合には、有機溶媒を多量に使用することなく、アルカリ除去液にて簡単に除去し得るものであり、ハウス、トンネル等の被覆材を廃棄、交換する必要が無くなり、農業従事者に対して、多大な経費節減をもたらす利点を有している。
As described above, the light-shielding coating solution applied to the agricultural film used for house cultivation or tunnel cultivation of the present invention uses a resin emulsion, two kinds of inorganic substances having different average particle diameters, and water that is an aqueous solvent, Furthermore, the ratio of the resin content to the inorganic material is within a specific range in terms of the solid content ratio. Among them, the light-shielding coating obtained by using an inorganic material having a different average particle size in a certain ratio among them. Water resistance is imparted to the membrane. Therefore, a light-shielding effect can be obtained over a long period of time without causing an inorganic film to flow away due to rainfall or the like. In addition, when the light-shielding coating is no longer necessary, it can be easily removed with an alkali removing solution without using a large amount of organic solvent, and the covering materials such as house and tunnel are discarded and replaced. There is no need and has the advantage of providing significant cost savings for farmers.
Claims (3)
The light-shielding coating solution according to claim 1 or 2, wherein the inorganic substance is calcium carbonate.
Priority Applications (5)
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| JP2004073860A JP4632679B2 (en) | 2004-03-16 | 2004-03-16 | Shading coating solution |
| KR1020067018754A KR101007165B1 (en) | 2004-03-16 | 2005-03-15 | Light-blocking agent for agricultural use |
| CN2005800086162A CN1934207B (en) | 2004-03-16 | 2005-03-15 | Light-blocking agent for agricultural use |
| TW94107771A TWI425061B (en) | 2004-03-16 | 2005-03-15 | Light-shielding agent for agriculture |
| PCT/JP2005/004480 WO2005087885A1 (en) | 2004-03-16 | 2005-03-15 | Light-blocking agent for agricultural use |
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| JP2004073860A JP4632679B2 (en) | 2004-03-16 | 2004-03-16 | Shading coating solution |
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| JP2015523052A (en) * | 2012-07-23 | 2015-08-06 | ソーラー・デヴェロップメンツ・ピーティーワイ・リミテッド | How to coat solar panels |
| JP2017093288A (en) * | 2013-11-22 | 2017-05-25 | 能美防災株式会社 | Light shielding device and light shielding agent |
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| KR101449795B1 (en) | 2012-02-27 | 2014-10-13 | (주)노루페인트 | Paint composition for vinyl greenhouse and method of manufacturing paint film using the same |
| CN104885780A (en) * | 2015-05-04 | 2015-09-09 | 丽水市瑞芝食用菌科技有限公司 | Insulation material capable of reducing temperature in edible fungus greenhouse and matched cultivation process |
| CN107759898B (en) * | 2016-08-18 | 2020-09-25 | 江苏金发科技新材料有限公司 | High-shading-degree polypropylene composite material and preparation method thereof |
| CN107793634A (en) * | 2016-08-29 | 2018-03-13 | 合肥杰事杰新材料股份有限公司 | A kind of light PP alloys with high shading performance and preparation method thereof |
| CN107778648A (en) * | 2016-08-29 | 2018-03-09 | 合肥杰事杰新材料股份有限公司 | A kind of white PP alloys of high light-proofness and preparation method thereof |
| CN111925685A (en) * | 2020-07-30 | 2020-11-13 | 陕西谱润生物科技有限公司 | Plant sun-screening agent and preparation method and application thereof |
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| JP2001521944A (en) * | 1997-11-03 | 2001-11-13 | ラードゲヴェント ケミービューロー アールエスビー ブイ．オー．エフ． | Removable protective coating |
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| CN1934207B (en) | 2012-07-25 |
| JP4632679B2 (en) | 2011-02-16 |
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