Controlled release coating material containing polymer micro nanoparticles

Abstract

The invention provides a controlled release coating material containing polymer micro nanoparticles. The controlled release coating material comprises the following components: ethylene-vinyl acetate copolymerization polymer and a blending polymer alloy thereof; polyvinylpyrrolidone and complex microelements and drug thereof; and polymer micro nanoparticles. The controlled release coating material containing the polymer micro nanoparticles is adjustable in chemical structure and has good film-forming property and degradability; by adding the polymer micro nanoparticles with uniform particle size, the porosity and controlled release property of coating can be regulated; besides, by loading specific active substances in a chemical bonding manner, multi-functionalization of controlled-release fertilizer is realized. The controlled release coating material containing the polymer micro nanoparticles can be taken as a coating of an agricultural controlled release fertilizer and can be also taken as a pesticide controlled release coating and coatings of other medical products.

Description

technical field

[0001] The invention relates to a sustained and controlled release coating material, in particular to a slow and controlled release coating material containing polymer micro-nano particles. Background technique

[0002] At present, environmental protection problems worldwide are facing unprecedented challenges, such as the deterioration of groundwater quality, eutrophication of rivers and lakes, and the decline of cultivated land soil quality, etc. The extensive use of chemical fertilizers is one of the main reasons for these problems. Therefore, the manufacture and use of environmentally friendly coated slow-release fertilizers is the main trend of the current chemical fertilizer industry, and it is also an inevitable requirement for the development of modern agriculture and the implementation of sustainable development strategies.

[0003] Coated slow / controlled release fertilizers use granular chemical fertilizers as the core, and the surface is coated wit...

Examples

Embodiment 1

[0047] A sustained and controlled release coating material containing macromolecule micro-nano particles, which consists of the following components:

[0048] (1) Maleic anhydride and methyl acrylate copolymer macromolecule micro-nano particles, particle diameter 100nm, content is 0.5% of the final weight of the coating material:

[0049] (2) Ethylene-vinyl acetate copolymers, the content of vinyl acetate units is 5%, and the content of ethylene-vinyl acetate copolymers accounts for 79.5% of the final weight of the coating material;

[0050] (3) Polyvinylpyrrolidone, number average molecular weight 45000, complexed manganese, iron, zinc, α-naphthalene acetic acid, auxin, abamectin, polyvinylpyrrolidone and its complex content accounted for 20% of the final weight of the coating material %.

Embodiment 2

[0052] A sustained and controlled release coating material containing macromolecule micro-nano particles, which consists of the following components:

[0053] (1) Maleic anhydride and vinyl acetate copolymer macromolecule micro-nano particles, particle diameter 220nm, content is 8% of the final weight of coating material;

[0054] (2) Ethylene-vinyl acetate copolymers, the content of vinyl acetate units is 10%, polymethyl methacrylate is introduced to form a blended alloy, and the content of polymethyl methacrylate is 40% of the ethylene-vinyl acetate copolymers, The total alloy content accounts for 75% of the final weight of the coating material.

[0055] (3) Polyvinylpyrrolidone, with a number average molecular weight of 58000, complexed with boron, selenium, auxin, Jinggangmycin, Wuyianin, the content of polyvinylpyrrolidone and its complexes accounts for 17% of the final weight of the coating material.

Embodiment 3

[0057] A sustained and controlled release coating material containing macromolecule micro-nano particles, which consists of the following components:

[0058] (1) Maleic anhydride and styrene copolymer macromolecule micro-nano particles, particle size 2 μm, content of 6% of the final weight of the coating material;

[0059] (2) Ethylene-vinyl acetate copolymers, the content of vinyl acetate units is 0.5%, and polybutyl acrylate is introduced to form a blended alloy. The content of polybutyl acrylate is 25% of the ethylene-vinyl acetate copolymers, and the total alloy content accounts for 85% of the final weight of the envelope material.

[0060] (3) Polyvinylpyrrolidone, number average molecular weight 1000, complexed with calcium, iron, copper, zinc, gibberellin, abscisic acid, Jinggangmycin, artesunate, polyvinylpyrrolidone and its complexes account for 9% of the final weight of the material.

technical field

[0001] The invention relates to a sustained and controlled release coating material, in particular to a slow and controlled release coating material containing polymer micro-nano particles. Background technique

[0002] At present, environmental protection problems worldwide are facing unprecedented challenges, such as the deterioration of groundwater quality, eutrophication of rivers and lakes, and the decline of cultivated land soil quality, etc. The extensive use of chemical fertilizers is one of the main reasons for these problems. Therefore, the manufacture and use of environmentally friendly coated slow-release fertilizers is the main trend of the current chemical fertilizer industry, and it is also an inevitable requirement for the development of modern agriculture and the implementation of sustainable development strategies.

[0003] Coated slow / controlled release fertilizers use granular chemical fertilizers as the core, and the surface is coated wit...

Examples

Embodiment 1

[0047] A sustained and controlled release coating material containing macromolecule micro-nano particles, which consists of the following components:

[0048] (1) Maleic anhydride and methyl acrylate copolymer macromolecule micro-nano particles, particle diameter 100nm, content is 0.5% of the final weight of the coating material:

[0049] (2) Ethylene-vinyl acetate copolymers, the content of vinyl acetate units is 5%, and the content of ethylene-vinyl acetate copolymers accounts for 79.5% of the final weight of the coating material;

[0050] (3) Polyvinylpyrrolidone, number average molecular weight 45000, complexed manganese, iron, zinc, α-naphthalene acetic acid, auxin, abamectin, polyvinylpyrrolidone and its complex content accounted for 20% of the final weight of the coating material %.

Embodiment 2

[0052] A sustained and controlled release coating material containing macromolecule micro-nano particles, which consists of the following components:

[0053] (1) Maleic anhydride and vinyl acetate copolymer macromolecule micro-nano particles, particle diameter 220nm, content is 8% of the final weight of coating material;

[0054] (2) Ethylene-vinyl acetate copolymers, the content of vinyl acetate units is 10%, polymethyl methacrylate is introduced to form a blended alloy, and the content of polymethyl methacrylate is 40% of the ethylene-vinyl acetate copolymers, The total alloy content accounts for 75% of the final weight of the coating material.

[0055] (3) Polyvinylpyrrolidone, with a number average molecular weight of 58000, complexed with boron, selenium, auxin, Jinggangmycin, Wuyianin, the content of polyvinylpyrrolidone and its complexes accounts for 17% of the final weight of the coating material.

Embodiment 3

[0057] A sustained and controlled release coating material containing macromolecule micro-nano particles, which consists of the following components:

[0058] (1) Maleic anhydride and styrene copolymer macromolecule micro-nano particles, particle size 2 μm, content of 6% of the final weight of the coating material;

[0059] (2) Ethylene-vinyl acetate copolymers, the content of vinyl acetate units is 0.5%, and polybutyl acrylate is introduced to form a blended alloy. The content of polybutyl acrylate is 25% of the ethylene-vinyl acetate copolymers, and the total alloy content accounts for 85% of the final weight of the envelope material.

[0060] (3) Polyvinylpyrrolidone, number average molecular weight 1000, complexed with calcium, iron, copper, zinc, gibberellin, abscisic acid, Jinggangmycin, artesunate, polyvinylpyrrolidone and its complexes account for 9% of the final weight of the material.

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