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A low temperature resistant protective film agent for fruit trees and its preparation method

A protective film agent, low temperature resistant technology, applied in the fields of botanical equipment and methods, biocides, fungicides, etc., can solve the problem of easy falling off of the coating film, achieve good film forming effect, prevent sunburn and strip damage, Simple preparation process

Inactive Publication Date: 2016-07-06
SHENYANG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the existing commercially available protective film agents for fruit trees have some effects on the sunburn damage of fruit tree branches, the coating film is easy to fall off due to more autumn rain in cold and cool climate areas.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Preparation of copolymer emulsion: Dissolve 0.01% sodium sulfite and 0.07% ammonium persulfate in 10% water according to the mass ratio to prepare a mixed solution of sodium sulfite and ammonium persulfate.

[0017] First add 15% water to dissolve 0.45% polyvinyl alcohol in the reaction kettle according to the mass ratio, then add 1.28% sodium lauryl sulfate, 2.57% OP-10 and 29.12% water, dissolve and filter again Impurities, control the temperature of the water bath at 30±2°C, and then dropwise add a mixture of vinyl acetate, butyl acrylate, methyl methacrylate and acrylic acid, the mixture consists of 25% vinyl acetate, 15% butyl acrylate, 1% methyl methacrylate and 0.5% acrylic acid. After full emulsification, add one-third of the mixed solution of sodium sulfite and ammonium persulfate dropwise, adjust the pH value to 6-7 with sodium bicarbonate, and add the remaining mixed solution of sodium sulfite and ammonium persulfate dropwise after constant temperature for a ...

Embodiment 2

[0020] Preparation of copolymer emulsion: Dissolve 0.08% sodium sulfite and 0.18% ammonium persulfate in 11% water according to the mass ratio to prepare a mixed solution of sodium sulfite and ammonium persulfate.

[0021] First add 17.5% water to dissolve 0.54% polyvinyl alcohol in the reaction kettle according to the mass ratio, then add 1.54% sodium lauryl sulfate, 3.09% OP-10 and 17.32% water, dissolve and filter again Impurities, control the temperature of the water bath at 30±2°C, then dropwise add a mixture of vinyl acetate, butyl acrylate, methyl methacrylate and acrylic acid, the mixture consists of 27.5% vinyl acetate, 17.5% butyl acrylate, 3% methyl methacrylate and 0.75% acrylic acid. After fully emulsified, add one-third of the mixed solution of sodium sulfite and ammonium persulfate dropwise, adjust the pH value to 6-7 with sodium bicarbonate, add the remaining mixed solution of sodium sulfite and ammonium persulfate dropwise after a period of constant temperatur...

Embodiment 3

[0024] Preparation of copolymer emulsion: Dissolve 0.15% sodium sulfite and 0.28% ammonium persulfate in 12% water according to the mass ratio to prepare a mixed solution of sodium sulfite and ammonium persulfate.

[0025] First add 20% water to dissolve 0.63% polyvinyl alcohol in the reaction kettle according to the mass ratio, then add 1.8% sodium lauryl sulfate, 3.61% OP-10 and 5.53% water, dissolve and filter again To remove impurities, control the temperature of the water bath at 30±2°C, then add a mixture of vinyl acetate, butyl acrylate, methyl methacrylate and acrylic acid dropwise, the mixture consists of 30% vinyl acetate, 20% butyl acrylate , 5% methyl methacrylate and 1% acrylic acid. After full emulsification, add one-third of the mixed solution of sodium sulfite and ammonium persulfate dropwise, adjust the pH value to 6-7 with sodium bicarbonate, add the remaining mixed solution of sodium sulfite and ammonium persulfate dropwise after a period of constant tempera...

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Abstract

A low temperature resistant protective film agent for fruit trees and a preparation method thereof. The agent is mainly prepared from components of vinyl acetate, a soft monomer of butyl acrylate monomer, a hard monomer of methyl methacrylate, a functional monomer of acrylic acid and an emulsion synergistic agent into a copolymer emulsion. The copolymer emulsion is then supplemented with functional materials including an inorganic dispersant, an organic dispersant, a wetting agent, a film forming agent, a surface active agent, an antifreeze, a heat resistance material, a fungicide and colloidal. The invention has the advantages of simple preparation process, low cost, stable polymerization of copolymer emulsion, no gel, minimum film forming temperature of 0 DEG C, good film forming effect, solid content of 44.5% and water absorption of 19.66%, can significantly improve the resistance of fruit trees to low temperature cold damage, prevent sunburn and pumping damage, delay the germination period, and is safe and environment-friendly.

Description

technical field [0001] The invention belongs to the field of plant protection, and in particular relates to a protective film agent applied on the surface of fruit trees in the dormant period to protect fruit tree branches from low temperature damage and improve the ability of fruit trees to cope with low temperature stress. Background technique [0002] In the cold and cold climate conditions in the north, the frequency of low temperature damage to plants is high and the impact is extensive. With the deterioration of the ecological environment, this damage is becoming more and more serious. Nowadays, low temperature damage has become one of the important meteorological disasters that restrict the cultivation of fruit trees and affect the yield and quality of fruits. [0003] A drop in temperature often leads to an increase in the permeability of plant cell membranes, and the leakage of substances in the membranes, resulting in physiological drought and the accumulation of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N47/34A01N25/10A01P3/00A01P21/00C08F218/08C08F220/18C08F220/14C08F220/06C08F2/26C08F2/30A01N31/02
Inventor 张枭刘国成吕德国马怀宇秦嗣军杜国栋
Owner SHENYANG AGRI UNIV
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