Seed Coating Composition With Water-Soluble Microplastic-Free Binder
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Solution Overview
Problem
Existing seed coatings rely on synthetic polymers that generate microplastics, posing environmental and health concerns due to their poor biodegradability and low solubility in water, necessitating a transition to microplastic-free alternatives with comparable film-forming properties.
Innovation Solution
A seed coating composition comprising a polymer obtained by polymerizing ethylenically unsaturated monomers in the presence of polysaccharides, with specific ratios of styrene, (meth)acrylates, and cycloalkyl (meth)acrylates, achieving a solubility in water greater than 2 g/l, thereby avoiding microplastic formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional synthetic polymers are used as seed coating binders, then film-forming properties and coating durability are improved, but environmental harm increases due to microplastic generation and poor biodegradability
Solution Approach 1:
The invention uses composite materials by combining natural polymers (starch, cellulose, chitosan, alginate, pectin, or their derivatives) with synthetic polymer binders in a seed coating composition. This composite approach allows the synthetic polymer to provide film-forming properties and coating durability while the natural polymer component reduces microplastic generation and improves biodegradability, thus resolving the contradiction between coating reliability and environmental harm.
2Stability of the object's composition
If synthetic polymers with poor water solubility are used, then coating stability and protection are improved, but environmental persistence increases leading to long-term microplastic contamination
Solution Approach 1:
The seed coating composition employs composite materials where natural polymers (starch, cellulose, chitosan, alginate, pectin, or their derivatives) are combined with synthetic polymer binders. The natural polymer component enhances water solubility and biodegradability, reducing environmental persistence, while the synthetic polymer maintains coating stability and protection, thus resolving the contradiction between coating stability and environmental persistence.
Solution Approach 2:
The invention changes the compositional parameters of the coating by incorporating natural polymers with different solubility and degradation characteristics. By adjusting the ratio and type of natural polymer (starch, cellulose, chitosan, alginate, pectin, or their derivatives) in the composite, the coating achieves optimized water solubility and biodegradability while maintaining stability, thus resolving the contradiction between coating stability and environmental persistence.
3Object-generated harmful factors
If natural polymers are incorporated into synthetic polymer coatings, then biodegradability and water solubility are improved, but film-forming properties may deteriorate
Solution Approach 1:
The invention uses composite materials by combining natural polymers (starch, cellulose, chitosan, alginate, pectin, or their derivatives) with synthetic polymer binders in specific ratios. This composite approach allows the synthetic polymer to provide film-forming properties while the natural polymer component enhances biodegradability and water solubility, thus resolving the contradiction between improved biodegradability and maintained film-forming properties.
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 solution provides a seed coating with comparable or improved film-forming properties while ensuring the polymer is not considered a source of microplastics, addressing environmental and health concerns associated with traditional synthetic polymers.
Implementation Method 1
a polymer obtained by polymerization of: a) from 0 to 50% by weight of at least one ethylenically unsaturated monomer selected among styrene or substituted styrene
Data Source
AI summary
The present invention relates to a a method for coating seeds comprising: i) providing a seed coating composition comprising, on dry weight basis, from 2 to 70% by weight (wt %) of a polymer obtained by polymerization of: a) from 0 to 50% by weight of at least one ethylenically unsaturated monomer selected among styrene or substituted styrene, b) from 10 to 70% by weight of at least one ethylenically unsaturated monomer selected among C1-C10-alkyl (meth)acrylates or cycloalkyl (meth)acrylates, c) from 0 to 50% by weight of at least one ethylenically unsaturated monomer different from a) and b), in the presence of d) from 30 to 90% by weight of a polysaccharide having a molecular weight Mn of 500 to 30,000 Da, wherein the percentage amounts of a), b), c) and d) are referred to the sum of a)+b)+c)+d); ii) applying said seed coating composition onto seeds.