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Film-forming agent for seed clothing sheet and preparation method thereof

A film-forming agent and coating technology, applied in the field of film-forming agent for seed coating and its preparation, can solve the problems of poor film wear resistance, low seed germination rate, poor slow-release control ability, etc. High uniformity, high coating coverage, and the effect of promoting crop growth

Inactive Publication Date: 2008-12-03
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of material generally takes a long time to form a film, and the formed film is easy to fall off in water, and the slow release control ability is poor.
Oil-soluble high molecular polymers need to use organic solvents and have disadvantages such as poor air permeability and low seed germination rate
The characteristics of the polymer itself determine that the film-forming strength of the high-adhesive variety is generally low, the product fluidity is poor, the film-forming is uneven (that is, the leveling performance is poor), the wear resistance of the film is poor, and it is easy to become powdery. Falling off; On the contrary, varieties with high film-forming strength have poor adhesion, poor affinity between the film and seeds, and are easy to fall off in flakes
This caused some early seed coating products to have defects in film-forming properties

Method used

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  • Film-forming agent for seed clothing sheet and preparation method thereof
  • Film-forming agent for seed clothing sheet and preparation method thereof
  • Film-forming agent for seed clothing sheet and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1. Preparation of film-forming agent for seed coating and verification of its effect

[0027] 1, the present invention is used for the preparation of the film-forming agent of seed coating

[0028] Add 8.5 g (0.05 mol) of 99% diacetone acrylamide, 7.1 g (0.1 mol) of 99% acrylamide, 0.1 g of ammonium persulfate, and 0.2 g of sodium dodecylbenzenesulfonate into a 250 mL three-neck flask with stirring , N, N, N', N'-tetramethylethylenediamine 0.1g, deionized water 75g. Start stirring, heat and control the reaction temperature at 40°C, and stir for 2 hours to obtain a copolymer of diacetone acrylamide and acrylamide, which is detected by infrared spectroscopy, nuclear magnetic resonance, gel permeation chromatography, and viscometer. The degree of polymerization of the product is 1400, and the copolymerization rate is 99.2%. Continue to drop about 30-40 drops per minute in the system and be 8.7g (0.005 moles) of adipic dihydrazide aqueous solution of 10% concentra...

experiment example 2

[0053] Experimental example 2. Preparation of film-forming agent for seed coating and its effect verification

[0054] 1, the present invention is used for the preparation of the film-forming agent of seed coating

[0055] Add 8.5 g (0.05 mol) of 99% diacetone acrylamide, 2.2 g (0.025 mol) of 99% methacrylic acid, 0.1 g of potassium persulfate, and nonylphenol polyoxyethylene ether (n= 20) 3g, 1g of 1,4-butanediamine, 52.8g of deionized water, start stirring, heat and control the reaction temperature at 60°C, stir for 2 hours to obtain the intermediate copolymer of diacetone acrylamide and methacrylic acid, use Infrared spectrometer, nuclear magnetic resonance instrument, gel permeation chromatography, viscometer and other tests show that the degree of polymerization of the copolymer is 1000, and the copolymerization rate is 99.5%. Continue to drop 33 g (0.025 moles) of 10% malonylhydrazide aqueous solution into the system, and continue to stir for 50 minutes after the additi...

experiment example 3

[0080] Experimental example 3. Preparation of film-forming agent for seed coating and its effect verification

[0081] 1, the present invention is used for the preparation of the film-forming agent of seed coating

[0082]Add 8.5 g (0.05 mol) of 99% diacetone acrylamide, 5 g (0.05 mol) of 99% methyl methacrylate, 4 g of benzoyl peroxide, and phenylethylphenol polyoxyethylene propylene into a 250 mL three-neck flask with stirring. Ether (m=10, n=20) 5g, ethylenediamine 0.2g, deionized water 54.5g, start stirring, heat and control the reaction temperature at 70°C, stir for 2 hours to obtain the intermediate diacetone acrylamide and methacrylic acid For the copolymer of methyl ester, detection by infrared spectrometer, nuclear magnetic resonance instrument, gel permeation chromatography, viscometer etc. shows that the degree of polymerization of the copolymer is 1300, and the copolymerization rate is 99.4%. Continue to drop 22 g (0.0125 mol) of 10% adipic hydrazide aqueous solut...

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Abstract

The invention discloses a film former for seed coating and the preparation method thereof. The preparation method comprises the steps as follows: subjecting diacetone acrylamide and unsaturated monomer to copolymerization reaction to obtain polymer, and reacting with dihydrazide compound to obtain film-forming material for seed-coating. The unsaturated monomer compound can be one or more selected from methyl methacrylate, styrene, vinyl acetate, vinyl chloride, maleic anhydride, N-vinyl pyrrolidone, vinylidene chloride, acrylonitrile, methyl vinyl ketone, methacrylic acid, acrylamide, methyl acrylate, ethyl acrylate, butyl acrylate, dihydrazide, N-vinylcarbazole and butadiene. The film former prepared by the method has good film physical chemical properties such as forming property, water resistance, air permeability, water permeability, etc., and drug slow release function to prolong drug effect and protect healthy growth of crops.

Description

technical field [0001] The invention relates to a film-forming agent for seed coating and a preparation method thereof. Background technique [0002] Film-forming agent is one of the important auxiliaries in pesticide seed coating agents, the key functional component of seed coating and the common component of all seed coating agents. Because the introduction of the film-forming agent enables the seed coating agent to form a film on the surface of the seed, which is different from the seed treatment agent. The main function of the film-forming substance in the seed coating agent is to adhere the active ingredient to the surface of the seed and form a uniform and smooth drug film. On the one hand, the film-forming material has strong water resistance and cannot be dissolved by water in soil with high moisture, especially in paddy fields; on the other hand, it has good water permeability and air permeability, allowing the water and oxygen required for seed germination to pass...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/58C08F220/14C08F212/08C08F8/00A01C1/06
Inventor 曹永松李健强刘西莉伍华英石天玉钱坤汤涛
Owner CHINA AGRI UNIV
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