Polymer Pest Control Compositions for Rainfast Bacillus Thuringiensis
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Solution Overview
Problem
Existing pest control compositions face challenges in maintaining effective residual protein concentrations of Bacillus thuringiensis after exposure to rain, leading to reduced pest control efficacy.
Innovation Solution
A pest control composition comprising a polymer with specific molecular weight and monomeric structural units derived from monomers with log P values between 2.0 and 6.0, combined with Bacillus thuringiensis and water, which enhances the rainfastness of Bacillus thuringiensis proteins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pest control compositions are used, then initial pest control activity is achieved, but residual protein concentration decreases significantly after rain exposure
Solution Approach 1:
The patent introduces a polymer as an intermediary substance that mediates between the Bacillus thuringiensis protein and rainwater. The polymer forms a protective complex with the protein, preventing rain from washing it away. Specifically, the composition includes a polymer with specific molecular weight (15,000-30,000 daltons) and monomeric structural units derived from monomers with log P values of 2.0-6.0, which creates a protective matrix that retains the protein on plant surfaces during rain exposure.
Solution Approach 2:
The patent creates a composite material system combining Bacillus thuringiensis protein with a specifically designed polymer. This composite formulation (containing 0.10-20.00 wt% polymer, 60.00-99.89 wt% water, and the protein) exhibits enhanced properties compared to the individual components, particularly in terms of rainfastness and residual activity. The polymer-protein composite resists washoff and maintains stability under rain exposure conditions.
2Reliability
If polymer additives are added to enhance rainfastness, then residual protein concentration is improved, but composition complexity increases
Solution Approach 1:
The patent optimizes specific parameters of the polymer to achieve effective rainfastness while maintaining formulation simplicity. Key parameters include: molecular weight (15,000-30,000 daltons), monomer composition (50-70 wt% from monomers with log P=2.0-6.0), and concentration in formulation (0.10-20.00 wt%). By precisely controlling these parameters, the polymer achieves maximum protective effect with minimal formulation complexity. The log P parameter specifically controls the polymer's hydrophobicity-hydrophilicity balance, optimizing its ability to protect the protein.
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 composition provides improved residual protein concentrations and Bacillus thuringiensis activity retention greater than 80% after exposure to rain, ensuring effective pest control.
Implementation Method 1
the polymer has a weight average molecular weight from 15,000 daltons to 30,000 daltons and contains from 50 wt % to 70 wt % of monomeric structural units derived from a monomer with a log P of from 2.0 to 6.0
Data Source
AI summary
A pest control composition includes a polymer. wherein the polymer has a weight average molecular weight from 15,000 daltons to 30,000 daltons and contains from 50 wt % to 70 wt % of monomeric structural units derived from a monomer with a log P of from 2.0 to 6.0; bacillus thuringiensis: and water.