JP2002060750A - Granular soil water-retaining agent - Google Patents
Granular soil water-retaining agentInfo
- Publication number
- JP2002060750A JP2002060750A JP2000284345A JP2000284345A JP2002060750A JP 2002060750 A JP2002060750 A JP 2002060750A JP 2000284345 A JP2000284345 A JP 2000284345A JP 2000284345 A JP2000284345 A JP 2000284345A JP 2002060750 A JP2002060750 A JP 2002060750A
- Authority
- JP
- Japan
- Prior art keywords
- water
- absorbing polymer
- temperature
- granular soil
- sensitive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Processes Of Treating Macromolecular Substances (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、植物等の育成に用
いられる、感温吸水性ポリマーを含有した顆粒状土壌保
水剤に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a granular soil water retention agent containing a thermosensitive water-absorbing polymer, which is used for growing plants and the like.
【０００２】[0002]
【従来の技術】土壌保水剤は、ガーデニング、法面緑
化、植栽等の分野で利用されており、各種の保水剤が知
られている。その中でも、特定の温度以下で水を吸収し
て膨潤し、特定の温度以上では収縮するという性質を有
する感温吸水性ポリマーが注目を集めている。2. Description of the Related Art Soil water retention agents are used in fields such as gardening, slope revegetation, and planting, and various water retention agents are known. Among them, a temperature-sensitive water-absorbing polymer having a property of absorbing water at a specific temperature or lower and swelling and shrinking at a specific temperature or higher has attracted attention.
【０００３】ところで、該ポリマーは、通常、粉末の状
態で土壌等と混合され使用されるため（例えば、特開平
６−３２２２７５号公報、同８−８９１０８号公報、同
８−１７２９００号公報、同１１−１６８７号公報、同
１１−２９９３４４号公報、等）、土壌と混合する
際、均一な混合状態を作りにくく、往々にして大きなゲ
ルの固まりを生ずること、微細な粉末であるため、作
業中に飛散しやすいこと、土壌中での吸排水の状態を
肉眼的に把握しにくいこと、等の問題点を有している。The polymer is usually used in the form of a powder mixed with soil or the like (see, for example, JP-A-6-322275, JP-A-8-89108, JP-A-8-172900 and JP-A-8-172900). 11-1687, 11-299344, etc.), when mixed with soil, it is difficult to form a uniform mixing state, and often a large gel mass is produced. And it is difficult to visually grasp the state of water absorption and drainage in the soil.
【０００４】[0004]
【発明が解決しようとする課題】これら欠点を解消する
ものとして、感温吸水性ポリマーを多孔材、例えば真珠
岩パーライト、に含有させたもの（特開平９−３０２３
３９号公報）、発泡体、例えばウレタンフォーム、に含
有させたもの（特開平１１−１０３６６２号公報）等の
報告もあるが、前者は感温吸水性ポリマーが脱落したり
その効果も十分でないという欠点が、後者は土壌と混合
して使用しずらいという欠点があった。As a solution to these drawbacks, a porous material, such as perlite pearlite, containing a thermosensitive water-absorbing polymer (Japanese Patent Application Laid-Open No. 9-3023) has been proposed.
No. 39), and a foam (for example, urethane foam) (Japanese Unexamined Patent Publication No. 11-103662) have been reported, but in the former, the temperature-sensitive water-absorbing polymer falls off or its effect is not sufficient. The disadvantage is that the latter is difficult to mix with soil and use.
【０００５】[0005]
【課題を解決するための手段】本発明者は、かかる課題
を解決すべく鋭意研究の結果、感温吸水性ポリマーを顆
粒状にすることにより、作業性に優れたうえ、土壌等に
混合した場合、大きさの揃ったゲルが均一に分散し、か
つ、吸排水状態が容易に確認できることを見出し、本発
明を完成するに至った。すなわち本発明は、（１）感温
吸水性ポリマーを含有した顆粒状土壌保水剤、（２）感
温吸水性ポリマー、賦形剤及び結着剤を含有した上記
（１）記載の顆粒状土壌保水剤、（３）感温吸水性ポリ
マーの含有率が２０〜７０重量パーセントである、上記
（１）乃至（２）記載の顆粒状土壌保水剤、（４）感温
吸収性ポリマー、賦形剤及び結着剤を、該感温吸水性ポ
リマーの感温点より高い温度の水中で混合した後、水を
除去し、次いで粉砕、乾燥することを特徴とする、感温
吸水性ポリマーを含有した顆粒状土壌保水剤の製造方
法、を提供するものである。Means for Solving the Problems The inventors of the present invention have conducted intensive studies in order to solve the above-mentioned problems. As a result, the temperature-sensitive water-absorbing polymer was formed into granules, so that it was excellent in workability and mixed with soil or the like. In this case, it was found that the gels having the same size were uniformly dispersed and the state of water absorption and drainage could be easily confirmed, and the present invention was completed. That is, the present invention provides (1) a granular soil water retention agent containing a thermosensitive water-absorbing polymer, (2) a granular soil water-absorbing polymer according to the above (1), containing a thermosensitive water-absorbing polymer, an excipient and a binder. (3) The granular soil water retentive agent according to (1) or (2), wherein the content of the thermosensitive water-absorbing polymer is 20 to 70% by weight, (4) the thermosensitive absorbent polymer, and shaping. After mixing the agent and the binder in water at a temperature higher than the temperature-sensitive point of the heat-sensitive water-absorbing polymer, removing the water, followed by pulverization and drying, containing a heat-sensitive water-absorbing polymer. And a method for producing a granular soil water retaining agent.
【０００６】以下、本発明を詳細に説明する。本発明で
いう感温吸水性ポリマーとは、設定された特定の温度
（以下、感温点という。）以下の温度では、水又は水溶
液を吸収膨潤し、感温点以上では、水又は水溶液をほと
んど吸収せず収縮するポリマーをいい、具体的には、Ｎ
−アルキル基置換（メタ）アクリルアミド類を主成分モ
ノマーとして重合、架橋することにより得られる。使用
できるＮ−アルキル基置換（メタ）アクリルアミドとし
ては、Ｎ−イソプロピル（メタ）アクリルアミド、Ｎ−
ｎ−プロピル（メタ）アクリルアミド、Ｎ−エチル（メ
タ）アクリルアミド、Ｎ、Ｎ−ジエチルアクリルアミ
ド、アクリロイルピペリジン、アクリロイルピロリジン
等を挙げることができる。感温吸水性ポリマーの感温点
は、上記主成分モノマーに親水性モノマーあるいは疎水
性モノマーを共重合することにより容易にコントロール
することができる。感温吸水性ポリマーは、１種類で
も、感温点の異なる数種類を混合したものでも用いるこ
とができる。Hereinafter, the present invention will be described in detail. The temperature-sensitive water-absorbing polymer referred to in the present invention means that water or an aqueous solution is absorbed and swelled at a temperature below a specified temperature (hereinafter referred to as a temperature-sensitive point), and water or an aqueous solution is absorbed at a temperature above the temperature-sensitive point. A polymer that shrinks with little absorption, specifically N
-It is obtained by polymerizing and crosslinking an alkyl group-substituted (meth) acrylamide as a main component monomer. Examples of usable N-alkyl group-substituted (meth) acrylamide include N-isopropyl (meth) acrylamide, N-
Examples thereof include n-propyl (meth) acrylamide, N-ethyl (meth) acrylamide, N, N-diethylacrylamide, acryloylpiperidine, and acryloylpyrrolidine. The temperature-sensitive point of the thermosensitive water-absorbing polymer can be easily controlled by copolymerizing a hydrophilic monomer or a hydrophobic monomer with the main component monomer. As the thermosensitive water-absorbing polymer, one kind or a mixture of several kinds having different temperature-sensitive points can be used.
【０００７】本発明でいう顆粒状とは、小さな粒状にな
っているものをいい、１粒の大きさは０．２〜５ｍｍの
不定形から球形の粒子である。必要に応じ篩い等で粒度
を揃える。[0007] The term "granular" as used in the present invention refers to small granules, each of which is irregularly shaped to spherical particles having a size of 0.2 to 5 mm. If necessary, adjust the particle size using a sieve or the like.
【０００８】感温吸水性ポリマーを含有した顆粒状土壌
保水剤は、感温吸水性ポリマー、賦形剤及び結着剤を、
該ポリマーの感温点より高い温度の水中で混合した後、
水を除去し粉砕・乾燥することにより得られる。顆粒状
土壌保水剤には、感温吸水性ポリマーを２０〜７０重量
パーセント含有させることが望ましい。感温吸水性ポリ
マーが２０パーセント以下であると保水効果が十分でな
く、また、７０パーセント以上であると、顆粒化が困難
となる。使用できる賦形剤としては、セルロース粉末、
珪藻土、ヤシガラ繊維粉末、ソバガラ、モミガラ等の天
然植物起源物、バーミキュライト等の無機化合物、及び
合成繊維等の合成物等が挙げられるが、安価で入手容易
なセルロース粉末が特に望ましい。[0008] The granular soil water retention agent containing a thermosensitive water-absorbing polymer comprises a thermosensitive water-absorbing polymer, an excipient and a binder.
After mixing in water at a temperature above the polymer's temperature point,
It is obtained by removing water, crushing and drying. It is desirable that the granular water retentive agent contains 20 to 70% by weight of the thermosensitive water-absorbing polymer. If the temperature-sensitive water-absorbing polymer is at most 20%, the water retention effect will not be sufficient, and if it is at least 70%, granulation will be difficult. Excipients that can be used include cellulose powder,
Examples include diatomaceous earth, coconut shell fiber powder, natural plant-derived substances such as buckwheat and firgrass, inorganic compounds such as vermiculite, and synthetic compounds such as synthetic fibers. Inexpensive and easily available cellulose powder is particularly desirable.
【０００９】結着剤としては、植物の成長と種子の発芽
に悪影響を与えないものであればいずれでもよいが、法
面緑化や植栽に使用される合成樹脂エマルジョンあるい
はその粉末、例えば緑化用粘結剤、土壌団粒化剤、植生
用浸食防止剤、種子吹き付け用粘着剤等が挙げられる。Any binder may be used as long as it does not adversely affect plant growth and seed germination. Synthetic resin emulsions used for slope greening and planting or powders thereof, for example, for greening Examples include a binder, a soil aggregating agent, an erosion inhibitor for vegetation, and an adhesive for spraying seeds.
【００１０】感温吸水性ポリマー、賦形剤、結着剤は、
該ポリマーの感温点以上の温度の水中で十分に混合され
る。感温吸水性ポリマー、賦形剤、結着剤の使用量は任
意であるが、感温吸水性ポリマー１００重量部に対し
て、賦形剤５０〜３００重量部、結着剤１０〜１００重
量部程度が好ましい。水の量はこれらが十分に混合でき
る量であれば問題ないが、結着剤が例えば合成樹脂エマ
ルジョンであれば、この水を利用することもできる。[0010] The thermosensitive water-absorbing polymer, excipient, and binder are
Mix well in water at a temperature above the polymer's temperature sensing point. The amounts of the heat-sensitive water-absorbing polymer, the excipient and the binder are arbitrary, but the excipient is 50 to 300 parts by weight and the binder is 10 to 100 parts by weight based on 100 parts by weight of the heat-sensitive water-absorbing polymer. Parts is preferred. There is no problem with the amount of water as long as they can be sufficiently mixed, but if the binder is, for example, a synthetic resin emulsion, this water can also be used.
【００１１】混合した後の水の除去は、圧搾脱水あるい
は遠心分離等の通常の方法で行われる。次いでニーダー
機等により粉砕した後、適当なメッシュの金網を通す
か、通常良く用いられる押し出し造粒機等にて湿顆粒と
する。湿顆粒は、熱風乾燥機等で品質に影響を与えない
範囲で熱をかけて乾燥し、本発明の顆粒状土壌保水剤を
得る。顆粒状土壌保水剤は、そのまま、あるいは必要に
応じて破砕機で処理したり、篩い分けをして粒度を揃え
ることもできる。Removal of water after mixing is carried out by a conventional method such as press dewatering or centrifugation. Next, after pulverizing with a kneader or the like, the mixture is passed through a wire mesh having an appropriate mesh, or formed into wet granules by a commonly used extrusion granulator or the like. The wet granules are dried by applying heat to a range that does not affect the quality with a hot-air dryer or the like to obtain the granular soil water retention agent of the present invention. The granular soil water retention agent can be treated as it is or, if necessary, with a crusher or sieved to make the particle size uniform.
【００１２】本発明の顆粒状土壌保水剤は、感温点以下
では自重の１０〜１００倍の水を吸収し、感温点以上で
は保持している水を排出する。[0012] The granular soil water retention agent of the present invention absorbs 10 to 100 times its own weight below the temperature sensing point, and discharges the retained water above the temperature sensing point.
【００１３】[0013]
【実施例】以下、実施例を挙げて本発明を更に詳細に説
明する。 実施例１ サーモゲル（興人製、粉末）１ｋｇとＫＣ フロック
（日本製紙製、セルロース粉末）１ｋｇとを混合した。
この混合物に、５０℃以上の温度のクリコートＣ−７１
０（栗田工業製）エマルジョン４．８Ｌ（クリコートＣ
−７１０、１．６Ｌと水、３．２Ｌとを混和したもの）
を注ぎ、保温下で良く混捏した。次にこれをかご型遠心
分離機を用い遠心脱水した。得られたケーキをニーダー
破砕機にて粉砕後、金網にて濾過、湿顆粒物４．９ｋｇ
を得た。これを９０℃で乾燥することにより、本発明の
顆粒状土壌保水剤２．２ｋｇを得た。本顆粒状物は、１
０℃以下の温度で１ｇ当たり約４０ｇの水を吸収した。EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples. Example 1 1 kg of thermogel (produced by Kojin, powder) and 1 kg of KC Floc (produced by Nippon Paper, cellulose powder) were mixed.
This mixture is added to a Curicoat C-71 at a temperature of 50 ° C. or higher.
4.8L (Curicoat C)
-710, 1.6L mixed with water, 3.2L)
And kneaded well while keeping the temperature warm. Next, this was centrifugally dehydrated using a cage type centrifuge. The obtained cake is pulverized with a kneader crusher, and then filtered through a wire mesh to obtain 4.9 kg of wet granules.
I got This was dried at 90 ° C. to obtain 2.2 kg of the granular soil water retention agent of the present invention. The granules are 1
At a temperature below 0 ° C., about 40 g of water were absorbed per gram.
【００１４】実施例２ 実施例１で得られた顆粒状土壌保水剤１２ｇを２Ｌの園
芸用土壌に混合した。混合の際のハンドリングは容易で
あり、また、均一に分散されていた。これに加肥後、プ
ランターにてキキョウ、アゲラタム、グラジオラスの苗
を移植、保水剤としての効果を検討した。対照として保
水剤無添加土壌を用い、水やりの回数を変え成長状態を
観察した。本発明の顆粒状土壌保水剤については、顆粒
の膨潤状態や土壌の湿り具合を見ながら水やりしたとこ
ろ、ほぼ３〜４日に１回の水やりで十分であった。一
方、無添加土壌では毎日の水やりが必要であった。Example 2 12 g of the granular soil water retention agent obtained in Example 1 was mixed with 2 L of horticultural soil. Handling at the time of mixing was easy, and it was uniformly dispersed. After fertilization, seedlings of Kikyo, Agelatum, and Gladiolus were transplanted with a planter, and the effect as a water retention agent was examined. As a control, a soil without a water retention agent was used, the number of times of watering was changed, and a growth state was observed. About the granular soil water retention agent of the present invention, when watering was performed while observing the swelling state of the granules and the wetness of the soil, watering once every three to four days was sufficient. On the other hand, daily watering was required in the soil without additives.
【００１５】[0015]
【発明の効果】本発明の顆粒状土壌保水剤は、粉末状の
ものと同様、感温吸排水効果を示すとともに、土壌への
混合の際、ハンドリングが容易となり、かつ、土壌に均
一に分散できる。また、混合状態が目視で確認でき、花
卉の栽培中、水の吸排水の状態が良く観察されるので、
次の水やりのタイミングが容易に判断できる。EFFECTS OF THE INVENTION The granular soil water retention agent of the present invention exhibits a thermosensitive water absorption and drainage effect as well as a powdery one, and is easy to handle when mixed with soil, and is uniformly dispersed in soil. it can. In addition, the mixed state can be visually confirmed, and during the cultivation of flowers, the state of water absorption and drainage is well observed.
The timing of the next watering can be easily determined.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０８Ｌ 97/02 Ｃ０８Ｌ 97/02 101/00 101/00 101/14 101/14 Ｃ０９Ｋ 3/00 Ｃ０９Ｋ 3/00 Ｎ // Ｃ０９Ｋ 101:00 101:00 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification code FI Theme coat ゛ (Reference) C08L 97/02 C08L 97/02 101/00 101/00 101/14 101/14 C09K 3/00 C09K 3 / 00 N // C09K 101: 00 101: 00
Claims (4)
壌保水剤1. A granular soil water retention agent containing a thermosensitive water-absorbing polymer.
を含有した請求項１記載の顆粒状土壌保水剤。2. The granular soil water retention agent according to claim 1, further comprising a temperature-sensitive water-absorbing polymer, an excipient and a binder.
０重量パーセントである、請求項１乃至２記載の顆粒状
土壌保水剤。3. The content of the temperature-sensitive water-absorbing polymer is 20 to 7
The granular soil water retention agent according to claim 1, which is 0% by weight.
を、該感温吸水性ポリマーの感温点より高い温度の水中
で混合した後、水を除去し、次いで粉砕、乾燥すること
を特徴とする、感温吸水性ポリマーを含有した顆粒状土
壌保水剤の製造方法。4. After mixing the heat-sensitive water-absorbing polymer, excipient and binder in water at a temperature higher than the temperature-sensitive point of the heat-sensitive water-absorbing polymer, remove the water, and then pulverize and dry. A method for producing a granular soil water retention agent containing a temperature-sensitive water-absorbing polymer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000284345A JP4143993B2 (en) | 2000-08-14 | 2000-08-14 | Granular soil water retention agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000284345A JP4143993B2 (en) | 2000-08-14 | 2000-08-14 | Granular soil water retention agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002060750A true JP2002060750A (en) | 2002-02-26 |
| JP4143993B2 JP4143993B2 (en) | 2008-09-03 |
Family
ID=18768569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000284345A Expired - Fee Related JP4143993B2 (en) | 2000-08-14 | 2000-08-14 | Granular soil water retention agent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4143993B2 (en) |
-
2000
- 2000-08-14 JP JP2000284345A patent/JP4143993B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP4143993B2 (en) | 2008-09-03 |
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