Degradable non-poisonous seed-coating agent and preparation method thereof

The technology of formula and plant extract is applied in the field of preparation of degradable and non-toxic seed coating agents, which can solve the problems of poor film-forming uniformity, poor seed affinity, and reduced germination rate, and achieve high adhesion and film-forming effect. The effect of improving and planting clothes is good

Inactive Publication Date: 2009-04-29
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In view of the existing technology, the film-forming strength is low, the wear resistance is poor, and it is easy to fall off in powder form. Secondly, the film-forming uniformity is poor, and the affinity with

Method used

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  • Degradable non-poisonous seed-coating agent and preparation method thereof
  • Degradable non-poisonous seed-coating agent and preparation method thereof
  • Degradable non-poisonous seed-coating agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0067] Example 1

[0068] (1) Preparation of water-soluble chitosan chitosan: Dissolve 50g of chitosan in 2% HAc aqueous solution, quickly raise the temperature to 60-65℃, and add 300g of 1-butyl-3-methylimidazole chloride salt ionic liquid (97wt%), add 30% H dropwise under stirring conditions 2 O 2 60g, heat preservation (85℃) and react for 3 hours, adjust the pH value to 7.1, cool to room temperature, separate the layered liquid by suction filtration, concentrate the filtrate at 40℃, precipitate with alcohol, wash, and dry to obtain water-soluble oligochitosan .

[0069] (2) Preparation of plant extract: Soak the plants rosemary, sophora flavescens, sophora flavescens, and ultrapure water for 24 hours in a relationship of 1:1:1:50, complete re-distillation at 80~90℃ for 2h, and then cool down by 40℃ The plant extract is filtered.

[0070] (3) Ingredients: Weigh the components according to the formula ratio, first mix the water-soluble chitosan and polyvinyl alcohol with the plan...

Example Embodiment

[0072] Example 2

[0073] (1) Preparation of water-soluble chitosan chitosan: Dissolve 100g of chitosan in 2% HAc aqueous solution, quickly raise the temperature to 60-70℃, and add 500g of 1-butyl-3-methylimidazole chloride ion In the liquid (97wt%), add 30% H dropwise under stirring conditions 2 O 2 110g, heat preservation (80℃) and react for 2 hours, adjust the pH value to 7.2, cool to room temperature, separate the layered liquid by suction filtration, and concentrate the filtrate at 45℃, precipitate with alcohol, wash, and dry to obtain water-soluble oligomeric chitosan sugar.

[0074] (2) Preparation of plant extract: Soak the plants rosemary, sophora flavescens, sophora flavescens, and ultrapure water for 24 hours in the relationship of 1.5:1.5:1:50, complete re-distillation at 80~90℃ for 2h, and then cool down by 50℃ The plant extract is filtered. The other steps are the same as in Example 1.

Example Embodiment

[0075] Example 3

[0076] (1) Preparation of water-soluble chitosan: Dissolve 70g of chitosan in 1.5% HAc aqueous solution, quickly raise the temperature to 70-85℃, and add 400g of 1-butyl-3-methylimidazole chloride ion In the liquid (97wt%), add 30% H dropwise under stirring conditions 2 O 2 70g, heat preservation (83°C) and react for 4 hours, adjust the pH to 7.3, cool to room temperature, separate the layered liquid by suction filtration, and concentrate the filtrate at 45°C, alcohol precipitation, washing, and drying to obtain water-soluble oligomeric chitosan sugar.

[0077] (2) Preparation of plant extract: Soak the plants rosemary, sophora flavescens, sophora flavescens, and ultrapure water for 24 hours in the relationship of 1.5:1.5:1:50, complete re-distillation at 80~90℃ for 2h, and then cool down by 50℃ The plant extract is filtered. The other steps are the same as in Example 1.

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Abstract

A degradable nontoxic seed coating agent comprises basic materials of water-soluble chitosan of 1.0-1.5wt%, gelatine of 0.05-0.1wt%, glycerol of 0.05-0.1wt%, PVA of 1.0-1.5wt% and plant extract of remainder, with the tensile strength of 18.7MPa, elongation of 10.1%, vapor transmission rate of 12.69g.mm/mm2.hr.mmHg, air permeability of (CO2)0.358*10-10ml.cm/cm2s.cmHg, air permeability of (O2)0.215*10-10ml.cm/cm2s.cmHg, hygroscopic rate of 47% and apparent viscosity of 290cp; uses water-soluble chitosan, PVA and plant extract to form seed coating film to not only meet performance requirement of conventional seed coating agents, but remarkably improve performance of film.

Description

technical field [0001] The invention belongs to the technical field of seed coating agents, and relates to a preparation method of a degradable nontoxic seed coating agent prepared by blending and reacting natural organic compounds and degradation products thereof. Background technique [0002] Seed coating agent is a substance with film-forming properties used for coating crops or other crop seeds, usually composed of effective ingredients (insecticides, fungicides, etc.), film-forming agents, dispersants, antifreeze agents and It is processed by other auxiliaries and can be coated on the surface of seeds directly or after dilution to form a pesticide formulation with a certain strength and permeability. Compared with soaking seeds, seed dressing, and stuffing seeds, the seed coating agent treatment technology has the advantages of long duration of drug potency, multiple effects of one drug, water retention and drought resistance, promotion of growth, improvement of quality...

Claims

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Application Information

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IPC IPC(8): A01N65/22A01N65/20A01N63/00A01C1/06
Inventor 黄德智黄赟如徐峰历学勇赵艺浓
Owner DALIAN POLYTECHNIC UNIVERSITY
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