JPS6034114A - Artificial soil for hydroponics - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to artificial soil for hydroponic cultivation of plants. More specifically, the present invention provides artificial soil suitable for hydroponic cultivation that is made of a water-swellable gel-like polymer whose main components are (meth)acrylamide component units and crosslinkable monomer component units. be.

Conventionally, when cultivating plants hydroponically, plants are grown directly in water containing fertilizer components, or cultivated in artificial soil filled with pebbles, gravel, glass pieces, plastic, etc. in water containing dissolved fertilizer components. There are methods to do this.

The former method does not adequately retain the roots during hydroponic cultivation, so there are drawbacks such as floating roots, overturning of plants, settling, and poor ventilation. Even if it is possible to retain water, the water retention is not sufficient, and it is not excellent from an aesthetic point of view, so it is difficult to say that it is suitable for ornamental hydroponic cultivation, and in this case, it is not suitable for root ornamentation.

The present inventors have developed a composition comprising a water-swellable gel-like polymer consisting of a crosslinked copolymer whose main components are (meth)acrylamide frequent component units and crosslinkable monomer component units, and a triazine compound. When used as artificial soil for hydroponic cultivation, it has better transparency, water retention, and
We discovered that it has excellent root retention, air retention, and ornamental properties, and also has excellent anti-algae and anti-mold properties, so its transparency and ornamental properties do not deteriorate over a long period of time. We have arrived at the present invention.

That is, the present invention comprises [A] a water-swellable gel polymer consisting of a crosslinked copolymer whose main constituents are (meth)acrylamide buccal component units and crosslinkable monomer component units, and [B] a triazine compound. This is an artificial soil for hydroponic cultivation consisting of .

The water-swellable gel polymer used in the artificial soil for hydroponic cultivation of the present invention is a crosslinked copolymer whose main components are (meth)acrylamide component units and crosslinkable monomer component units. . The crosslinked polymer has a (meth)acrylamide buccal component unit and a crosslinkable monomer component unit as essential main components, but it also contains a small amount of other copolymerization, for example in the range of 10 mol% or less. There is no problem even if it contains ingredients. Examples of the other copolymerization components include component units such as acrylic acid, methacrylic acid, salts of acrylic acid, and salts of tutaacrylic acid. Here, the (meth)acrylamide component unit is acrylamide, methacrylamide, or an N-alkyl substituted product thereof, and specifically, acrylamide, methacrylamide, N-methylacrylamide, N,N-dimethylacrylamide, N-
Methylmethacrylamide, N,N-dimethyl(meth)acrylic 2. A8. Let me exemplify 1. Toga dekio. . Rera.

Among the (meth)acrylamide component units, acrylamide or methacrylamide component units are particularly preferred. Further, specific examples of the crosslinkable monomer component unit include N,N'-methylenebis(meth)acrylamide, N,N'-ethylenebis(meth)acrylamide, N,N'-ethylidenebis(meth)acrylamide,
N, N'-propylene bis(meth)acrylamide, N
, N'-propylidene bis(meth)acrylamide, N
, N'-hexamethylenebis(meth)acrylamide,
Bis(meth)acrylamides such as N,N'-phenylenebis(meth)acrylamide, ethylene bis(
Bis(meth)acrylates such as meth)acrylate, propylene bis(meth)acrylate, hexamethylene bis(meth)acrylate, diethylene glycol bis(meth)acrylate, I-diethylene glycol bis(meth)acrylate-1-, polyethylene glycol bis( For example, meth)acrylate may be used, and a mixture of two or more components may be used.

Among these crosslinkable monomer component units, N, N'-
Particularly preferred are methylene bis(meth)acrylamide component units. The content of the crosslinkable monomer component unit is usually in the range of 0.01 to 10 mol%, preferably 0.1 to 5 mol%.

The water-swellable gel polymer may be a crosslinked copolymer composed of (meth)acrylamide component units and crosslinkable monomer component units, which are the essential constituents, Class component unit, crosslinking a! It may also be a crosslinked copolymer composed of the mer component unit and the other copolymerizable Ii mer component unit. Among the water-swellable gel polymers, the latter terpolymer can be produced by a direct copolymerization method, or by partially hydrolyzing or saponifying the former binary copolymer. It can also be produced by a method in which a small part of the (meth)acrylamide component is converted into (meth)acrylic acid or a salt component unit thereof.

The density of the water-swellable gel-like polymer is such that the copolymer is
The value after drying at C for 48 hours is 1.0 to 1.
8 g/cJ, preferably 1.1 to 1,5 g/cJ
The degree of swelling in water at 24° C. is usually in the range of 3 to 5000, preferably 8 to 1000, in terms of the weight ratio of absorbed water to the dry polymer.

The density and degree of swelling of the dried polymer were measured using the following method.

(1) Density: the constant weight (Wg) of the dry polymer is 2
51111 vicinometer. The pycnometer containing the polymer was then placed in a constant temperature bath at 24°C and filled with toluene at 24°C.

Tolué required for this Calculate the toluene volume (V) from the weight of It was calculated using the following formula.

Polymer density (g/cJ) = 25-■ (2) Swelling degree: A certain weight (Wag) of the dried polymer was taken and immersed in water for 24 hours at 24 degrees to sufficiently swell the polymer. Thereafter, excess water was removed, the weight (W2g) of the swellable gel was measured, and L was calculated using the following formula.

W+ The triazine-based compound (B) blended into the artificial soil for hydroponic cultivation of the present invention is triazine or a nuclear substituted product thereof. Specifically, 2-chloro-4,6-bis(ethylamine>-s-triazine, 2-chloro-4-ethylamino-6-butylamino-5-1-riazine, 2-chloro-6- Isopropylamino-4-methylamino-5-
) riazine, 2-chloro-4,6bis(isopropylamino)-S-)riazine, 2-chloro-4-diethylamino-6-ethylamino-3-triazine, 2-chloro-4-diethylamino-6-ethylamino -5-triazine, 2-chloro-4-diethylamino-6-isopropylamino-5-)riazine, 2-chloro-4,6-bis(diethylamino)-3-triazine, 2-chloro-
4-ethylamino-6-sec-butylamino-5-triazine, 2-chloro-4-ethylamino-6-ter
t-Butylamino-s-+-riazine, 2-chloro-4
, 6-bis(allylamino)-5-1 riazine, 2-chloro-4-methylamino-6-(1-cyano-1-methylethylamino)-3-) riazine, 2-chloro-4-
Ethylamino-6-(1-cyano-1-methylethylamino)-3-1 riazine, 2-chloro-4-cyclopropylamino-6-isopropylamino-3-triazine, 2-chloro-4-cyclopropyl Amino-6-(1-
2-halo 2,4-diamino-5 such as cyano-1-methylethylamino)-1-) liazine, 2-chloro-4-isopropylamino-6-(3-methoxyprohylamino)-1-) liazine -triazine and its N-substituted product, 2-methoxy-4-isopropylamino-6-methylamino-5-1-riazine, 2-methoxy-4,6
-bis(ethylamino)-S=nitriazine 2-methoxy-4-diethylamino-6-isopropylamino-5
-) riazine, 2-methoxy-4,6-bis(3-methoxypropylamino) -S-triazine, 2-methoxy-4-diethylamino-6-itupropylamino-S-) riazine, 2-methoxy-4 , 6-bis(3-methoxypropylamino)-3-triazine, 2-methoxy-4-isopropylamino-6-(N-acetylethylamino)-5-triazine, 2-methoxy-4-ethylamino-6- isopropylamino-S-triazine,
2-methoxy-4-sec-butoxyamino-6-ethylamino-5-) liazine, 2-methoxy-4,6-bis(isopropylamino)-s-1-lyazine, etc.
-Alkoxy-4,6-diamino-S-triazine and its N-substituted derivatives, 2-methylthio-4,6-bis(ethylamino)-3-triazine, 2-methylthio-4,
6-bis(isopropylamino)-3-1-riazine, 2-methylthio-4-ethylamino-6-(1-cyano-1-methylethylamino) to s-l-lyazine,
2-Methylthio-4-ethylamino-6-itupropylamino-S-)riazine, 2-methylthio-4-ethylamino-6, -5ec-butylamino-s-triazine, 2-methylthio-4-isopropylamino -6-(3
-methoxypropylamino> -s-triazine, 2-
Methylthio-4-isopropylamino-6-tert-
Butylamino-3-triazine, 3-methylthio-4,
6-bis(3-methoxypropylamino)-s-triazine, 3-methylthio-4-(L2-dimethylpropylamino)-6-ethylamino-S-triazine, 3-methylthio-4-isopropylamino-6- see-butylamino-s-triazine, 2-methylthio-4-isopropylamino-6-sec-butylamino-3-triazine, 2-methylthio-4-isopropylamino-6
-2-alkylthio-4,6-diamitu-5-1-riazine such as -methylamino-3-triazine and its N
- Substituents can be exemplified.

The blending ratio of the triazine compound is generally 0.1 to 11,000 ppm, preferably 1 to 500 ppm, based on the dry crosslinked copolymer. As a blending method, the crosslinked copolymer may be swollen in water containing the triazine compound, or the triazine compound may be added to the crosslinked copolymer swollen with water.

The artificial soil for hydroponic cultivation of the present invention is used in a state in which the above-mentioned copolymer is swollen in water, and the water is optionally filled with antifungal agents, other antialgal agents, fertilizer components, such as Porgland's solution, etc. can also be dissolved.

Further, in some cases, it may be possible to dissolve a coloring agent in order to enhance the ornamental effect. Into the artificial soil for hydroponic cultivation of the present invention, grown plants can be transplanted, seedlings can be transplanted, and seeds can be sown. The artificial ijG for hydroponic cultivation of the present invention has excellent transparency, air preservation, water retention, and root retention, so it is suitable for ornamental cultivation, and since the growth status of roots can be observed, it is suitable for experimental observation cultivation. is also suitable. For these uses, it is suitable to cultivate in transparent pots or containers made of glass, polystyrene, polymethyl methacrylate, polyolefin, or the like.

Example 1 To 10 g of dry pellet-like (cylindrical shape with diameter 2110 and length 2 pores) acrylamide/N, l/-methylenebisacrylamide (100/1) copolymer, 200 ml of water,
Beaugland fertilizer 0.21g and triazine herbicide 2
-Methylthio-4-ethylamino-6-itubrobylamino S-triazine (Ciba Geigy, trade name)
Ametrine) 0.6 mg was added and left overnight to swell the copolymer to create artificial soil for hydroponic cultivation. I transplanted Saintpaulia, which was grown by alley cultivation into this artificial soil and had a plant height of approximately IQcnY, and placed it indoors with sunlight.
Cultivation was carried out while supplementing with dilute liquid fertilizer. St. Bauria grows smoothly, and even after 4 months, the artificial soil remains clear and colorless.Good Comparative Example 1 After repeating the cultivation, single-celled algae began to proliferate after about a month, and the soil began to turn green. Although no abnormality was observed in the growth of Saintpaulia, after four months the entire artificial soil was covered with green algae and became opaque.

Example 2 Drying was carried out in the same manner as in Example 1, except that hegonia was transplanted instead of St. Paul's.

As a result, as in Example 1, Begonia was in order XI! :I, and even after 4 months, the artificial soil remained clear and colorless.

Comparative Example 2 Begonias were transplanted in the same manner as in Example 2, without adding the riazine herbicide ametrine.

As a result, brown algae began to appear after about one month, and four months later, although there was no abnormality in the growth of begonias, brown algae grew throughout the artificial soil, making it opaque.

Examples 3 to 6 In Example 1, the triazine herbicide shown in the table was used instead of Ame I/phosphorus, and the ffi! ! After adding this, St. Bauria was transplanted and cultivated in the same manner as in Example 1. As a result, no matter which triazine-based herbicide was added, St. Bauria grew smoothly, and even after 4 months, the artificial soil was clear and colorless, and no precipitates were observed.

Example 7 In Example 1, dried pellet-like (diameter 2 diameter 1,
Methacrylamide N, N'-
The same procedure as in Example 1 was carried out except that 10 g of methylenebisacrylamide (100/ ) copolymer was used. Saintpaulia grew smoothly, and even after four months, the artificial soil remained clear and colorless.

Comparative Example 3 In Example 7, when the same operation as in Example 7 was repeated without adding the triazine herbicide ametrine, f-1i cell algae began to proliferate after about one month, and the artificial soil It started to turn green. Although no abnormalities were observed in the growth of St. Bauria, the entire artificial soil became covered with green algae and became opaque after four months.

Applicant: Mitsui Ishiura Chemical Industry Co., Ltd. Agent Kazu Yamaguchi

Claims (1)

[Claims] +11 (A) A water-swellable gel-like polymer comprising a crosslinked copolymer whose main constituents are (meth)acrylamide component units and crosslinkable (B1 component units), and [B] 1-Artificial soil for hydroponic cultivation consisting of a riazine compound.