JPS58162501A - Covering agent composition for plant - Google Patents

Abstract

PURPOSE:The titled composition for preventing simply the frost damage of leaf faces of plants for a long time, preventing blights in case of necessity, capable of coloring leaf faces, comprising a water-insoluble formed film consisting of water dispersion of a (co)polymer of an acrylic acid ester, etc., capable of forming a film at normal temperature. CONSTITUTION:A coating agent composition for plants comprising an aq. dispersion of a homopolymer or a copolymer of acrylic acid ester or methacrylic acid ester, capable of forming a water-insoluble film at normal temperature, and, if necessary, an antimicrobial agent (e.g., benlate, polyoxins, etc.), and pigment. The formed film is water-insoluble, crystalline or amorphous, does not flow away by wind and rain, does not damage respiration on leaf face, and has improved weather resistance and leaf face touch. It can prevent withering by frost in winter for a long time and keep leaf face healthy green.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a plant coating composition, and more specifically, it is applied to the bare surface of plants to form a film to prevent frost damage, control diseases, and color the bare surface of plants. The present invention relates to a plant coating composition that has a chemical composition.

Conventionally, in order to prevent frost damage to Sumiyoshi grass and other plants outdoors, methods such as generating smoke to prevent moisture in the air from condensing on the leaf surface, and spraying books to freeze the bare surface, etc. However, these methods are not sustainable, require time and effort, and are not sufficiently effective in preventing frost damage.

The present invention has been made to solve these problems, and has the objective of "preventing frost damage on the Jllll of plants over a long period of time, controlling diseases as necessary, and coloring the IUI". It is an object of the present invention to provide a plant coating composition obtained by the present invention.

The plant coating composition according to the present invention is an aqueous dispersion of a homopolymer or copolymer of an acrylic ester or a methacrylic ester, which has a film-forming ability at room temperature and whose film is insoluble in water. It is characterized by being made of liquid.

Examples of acrylic esters, methacrylic acid varnishes, and til (hereinafter abbreviated as methacrylic esters) that are preferably used in the present invention include (methyl methacrylate, ethyl (meth)acrylate, and butyl methacrylate). Examples of these copolymers include copolymers of two or more types of methacrylic acid esters mentioned above, as well as copolymers of one or more of these (meth)acrylic acids and styrene, (meth)acrylic acid. Examples include copolymers with one or more of acrylonitrile, vinyl acetate, butadiene, and the like.

The plant coating composition of the present invention is sprayed onto the bare surface of a plant to form a film, thereby protecting the bare surface from frost damage.

The film formed by the single or copolymer of methacrylic acid ester (as described above) is water-insoluble, has low crystallinity or non-crystallinity, does not wash away due to rain and dew, and is suitable for use on plant leaves. It only does not inhibit the respiratory activity that is lazy on the face.
It has excellent weather resistance and a bare feel.

The above-mentioned aqueous dispersion consisting of a single or copolymer of methacrylic acid ester is sprayed on leaves and then forms a film at room temperature (minimum film-forming temperature (hereinafter abbreviated as MFT)).
is preferably in the range of 0 to so''c, preferably 0 to 10''c.

Such aqueous dispersions of single or copolymers of metacoacrylic acid esters can be obtained by conventional emulsion polymerization, or can be obtained by adding polymers obtained by solution polymerization or bulk polymerization to water. It can also be obtained by dispersing the polymer in the aqueous dispersion.The appropriate amount of polymer in the aqueous dispersion is 10 to 50% by weight, taking into account the workability of dispersion and the thickness of the film formed.

Furthermore, in the present invention, the aqueous dispersion may contain an antimicrobial agent to control plant diseases. In general, to prevent the growth of molds that tend to infest plants in the winter under the polymer film, cypress, benlate, polyoxin, thiabendazole, etc. are used, but they are not limited to these.

It may also contain pigments to color the leaf surface.

The plant coating composition of the present invention is composed of an aqueous dispersion of a (meth)acrylic acid ester alone or a copolymer, and when sprayed on the leaves of plants, it has excellent weather resistance and inhibits the respiration activity of plants. Since it forms a water-insoluble film at room temperature, it can prevent frost blight and keep the leaf surface healthy and green for a long period of time during the winter. Furthermore, when the plant coating composition contains an antimicrobial agent, it can also control diseases and is suitable for use on western grass etc. in winter.

Examples are given below.

Example (1) In a 500-meter reactor equipped with a variable needle, a stirrer, a nitrogen introduction tube, and a reflux condenser, butyl acrylate, 30 parts of methyl methacrylate, 3 parts of polyoxyethylene alkylphenol ether, and ion-exchanged water were added. Charge 160 parts and heat while stirring under a nitrogen stream until the reaction system reaches approximately 65 parts.
When @C is reached, the polymerization initiator ammonium persulfate 0.
3 parts were added to initiate polymerization, and emulsion polymerization was carried out for about 3 hours. After the reaction was completed, the mixture was heated to about 75@C and aged for about 1 hour to obtain an emulsion with a solid content of 3996.

This emulsion was diluted twice with water, and a small amount of green pigment was added to the 100-fold solution to obtain Coating Composition 13. In addition to the pigment, 50% benlate per 100% water conservancy IP was added to obtain a coating composition 1b. All of these MFTs were 56C.

(2) A small amount of green pigment was added to the emulsion obtained above without diluting it to obtain 2 m of coating composition. In addition to pigments, 100" polyoxin per 100" of emulsion
Coating composition 2b was obtained by dissolving f.

(3) Emulsion polymerization was carried out in the same manner as in (1) above using a monomer composition of 65 parts of butyl acrylate and 35 parts of styrene to obtain an emulsion with a solid content of 39%.

This emulsion was diluted twice with water to form coating composition 3.
! 11 and further thiabendazole 50 per 100
w9 was added to obtain coating composition 3b. MB”T was all lO@c (4) 2 parts of esul acrylate, 3 parts of butyl acrylate,
0.75 parts of sodium lauryl sulfate and 160 parts of ion exchange water
of the reaction system was heated with stirring under a nitrogen stream until the reaction system reached about 65%
°C, the polymerization initiator ammonium persulfate 0.
1 part was added to initiate polymerization, and emulsion polymerization was carried out for about 1 hour. Next, add 0.2 part of ammonium persulfate,
At a temperature of 651C, a monomer mixture of 3 parts of butyl acrylate and 35 parts of methyl methacrylate was added dropwise over about 2 hours to polymerize. After the reaction was completed, the reaction system was heated to about 75°C and aged for 1 hour to obtain an emulsion with a solid content of 4091.

This emulsion was diluted twice with water to form coating composition 4.
&, and Benlate 50-hydrating agent IP was further added to 100- to prepare coating composition 4b. MFT was 311C in all cases.

(5) 60 parts of butyl methacrylate, 60 parts of ethyl acrylate, 150 parts of methacrylic acid, and 0 parts of azobisvaleric acid.
A mixture consisting of 15 parts of . After this, while dropping the remaining amount of the above mixture into the container, 836
The copolymer was heated at C for 4 hours, and 1/16"!I of a 20-hydrocarbon aqueous solution was added to the carboxyl group of the obtained copolymer, and neutralized at a temperature of 861C. After that,
While stirring, 250 parts of water was gradually added dropwise to 100 parts of the copolymer over a period of about 2 hours. At this time, when 150 parts of water was added, the continuous phase became water, and a phase inversion phenomenon occurred.

The aqueous dispersion thus obtained had a solids content of 26.5%.

This aqueous dispersion was diluted with water to a solid content of 20 qII to obtain 5 m of a coating composition, and 1 p of the 100 ml of Penley 5051 hydrating agent was added to obtain a coating composition 5b. All of these MFTs were 5@C.

The Western grass was divided into sections, and each coating and agent composition obtained above was applied to the Western grass leaves in early December at a concentration of 2゛0- in each section to check the occurrence and status of frost blight and white spot disease. The animals were observed for two months and compared with the control group. The results are shown in the table.

The criteria for determining greenness are as follows. That is, 10
tts When viewed from a distance, all ten surfaces are green.

廿 Slightly yellowish.

10 Yellow-brown color is observed partially.

Sir: There is a little bit of green left.

-The entire surface is yellow to tan.

In addition, the criteria for determining the incidence of vitiligo disease are:
, occurred in two locations.

Physician: Changes that seemed to be caused by vitiligo disease were observed in two places.

-No vitiligo occurred.

Claims (2)

[Claims] (1) It has film-forming ability at room temperature, and the film formed is composed of an aqueous dispersion of a homopolymer or copolymer of acrylic ester or methacrylic ester, which is water-insoluble. Plant coating composition. (2) The plant coating composition according to claim 1, which comprises kernels containing an antimicrobial agent and/or a pigment.