Layered Microbial Granules with Polyhydroxy Phosphate Coating
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Solution Overview
Problem
Current bioactive agent formulations, such as microorganisms and enzymes, face challenges in maintaining viability and stability at ambient temperatures and humidity without refrigeration or special packaging, often resulting in rapid loss of activity and incomplete dissolution in water, leading to residue issues in agricultural and industrial applications.
Innovation Solution
Development of a layered granule structure with a water-soluble core surrounded by a coating layer containing a polyhydroxy compound and a phosphate compound, which is fast-dissolving and dispersible, ensuring rapid dissolution and extended shelf life while minimizing dust and residue formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional coatings and binders (polyvinyl alcohol, hydrophobic compounds, insoluble pigments) are used to stabilize bioactive agents, then storage stability is improved, but dissolution speed deteriorates and residue formation increases
Solution Approach 1:
The patent changes the chemical composition parameters of the coating layer by using water-soluble polymers (such as polyvinyl alcohol, polyacrylic acid, or carboxymethyl cellulose) combined with soluble salts (sodium chloride, potassium chloride, ammonium chloride) and soluble sugars (sucrose, trehalose, maltose). This parameter change enables the coating to dissolve rapidly in water while maintaining storage stability, resolving the contradiction between stability and dissolution speed.
Solution Approach 2:
The patent creates a composite coating layer material combining water-soluble polymers with soluble salts and soluble sugars. This composite formulation provides both protective stabilization during storage and rapid dissolution upon contact with water, eliminating the need for slow-dissolving or insoluble materials that caused residue problems in conventional formulations.
2Reliability
If conventional coatings (polyvinyl alcohol, hydrophobic compounds) are used to protect bioactive agents, then viability is improved, but dustiness and residue issues worsen
Solution Approach 1:
The patent changes the solubility parameters of the coating materials from insoluble or slow-dissolving (polyvinyl alcohol, hydrophobic compounds) to water-soluble polymers combined with soluble salts and sugars. This parameter change ensures the coating dissolves completely in water, eliminating dustiness and residue formation while maintaining the protective function for bioactive agent viability.
Solution Approach 2:
The patent employs a coating layer designed to be temporary and disposable in the sense that it serves its protective function during storage and then dissolves completely upon application. The water-soluble polymer, salt, and sugar combination creates a coating that vanishes in water, leaving no residue or dust, thus eliminating harmful factors associated with conventional coating materials.
3Duration of action of stationary object
If freeze drying or desiccants are used to maintain low water activity, then shelf life is improved, but device complexity and packaging requirements worsen
Solution Approach 1:
The patent incorporates water-soluble polymers, soluble salts, and soluble sugars into the granule formulation during manufacturing. These components act as preliminary protective measures that maintain low water activity and prevent microbial growth during storage at ambient conditions. This preliminary action eliminates the need for complex packaging systems with desiccants or refrigeration, achieving extended shelf life through the formulation itself.
Solution Approach 2:
The water-soluble polymer, salt, and sugar combination in the granule formulation provides self-service protection during storage. The coating layer automatically maintains low water activity and prevents degradation without requiring external intervention such as refrigeration or desiccant packs. This self-service mechanism extends shelf life while eliminating the need for complex packaging systems.
4Stability of the object's composition
If slow-dissolving high molecular weight polymers are used in granule coatings, then stability is improved, but ease of operation deteriorates due to slow dissolution and clogging
Solution Approach 1:
The patent changes the molecular weight and solubility parameters of the coating polymers from high molecular weight and insoluble (polyvinyl alcohol) to water-soluble polymers with appropriate molecular weights. Combined with soluble salts and sugars, this parameter change enables rapid dissolution within seconds of water contact, improving ease of operation while maintaining stability through the protective coating function.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The granule structure achieves rapid dissolution in water, maintains bioactive agent viability for extended periods at ambient conditions, reduces dust and residue issues, and enhances flowability, making it suitable for various applications including agriculture and animal husbandry without the need for refrigeration or special packaging.
Implementation Method 1
a protectant matrix that includes at least one polyhydroxy compound and at least one phosphate compound
Implementation Method 2
the core is water-soluble and fast-dissolving
Data Source
AI summary
Described are compositions and methods relating to layered granules comprising a core surrounded by a coating layer containing bioactive agents distributed within a protectant matrix, wherein the protectant matrix includes at least one polyhydroxy compound and at least one phosphate compound. The core and the protectant matrix are water soluble and fast-dissolving.