Polymer Dispersion for Insecticidal Surface Durability
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Solution Overview
Problem
Existing pest control compositions, particularly insecticidal suspension concentrates and spray solutions, have short-lasting effects on porous and alkaline surfaces such as concrete, plaster, and wood, and are vulnerable to environmental factors like temperature, UV radiation, and rain, necessitating frequent applications and reduced efficacy.
Innovation Solution
Development of aqueous suspension concentrates containing an insecticide, a non-ionic or ionic dispersant, and a polymer dispersion produced by radically initiated emulsion copolymerization of ethylenically unsaturated monomers, including styrene and (meth)acrylic acid esters, with a graft-active redox system, which provides long-lasting protection and stability on various surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If conventional insecticidal spray solutions are applied to porous and alkaline surfaces, then initial insecticidal effect is achieved, but the duration of effect is severely reduced
Solution Approach 1:
The patent uses a composite polymer system consisting of a polyacrylic acid backbone grafted with polyethylene oxide side chains. This composite structure combines the adhesion properties of polyacrylic acid with the water solubility and flexibility of polyethylene oxide, creating a polymer that can effectively bind to porous surfaces while maintaining insecticidal agent release over extended periods.
Solution Approach 2:
The patent modifies the polymer parameters by controlling the degree of grafting (20-80%) and the molecular weights of both the backbone (10,000-1,000,000 g/mol) and side chains (1,000-100,000 g/mol). These parameter changes optimize the polymer's ability to form stable films on porous surfaces, preventing rapid wash-off and extending the duration of insecticidal effect from months to years.
2Reliability
If insecticidal active ingredients are applied frequently to maintain effectiveness, then protection level is maintained, but user exposure and environmental impact increase
Solution Approach 1:
The grafted polymer creates a continuous protective film on surfaces that slowly releases insecticidal agents over extended periods. This continuous action eliminates the need for frequent reapplication, reducing user exposure and environmental impact while maintaining consistent protection levels against insects throughout the year.
3Duration of action of moving object
If polymer dispersions are used to extend insecticidal effect, then duration of protection is improved, but formulation complexity increases
Solution Approach 1:
The grafted polymer acts as an intermediary carrier between the insecticidal active ingredient and the porous surface. Rather than directly applying complex formulations, the polymer mediates the interaction by adsorbing the insecticidal agent and presenting it to the surface in a controlled manner, simplifying the overall formulation while extending protection duration.
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 described compositions exhibit improved long-term biological effect and durability, maintaining efficacy even under adverse environmental conditions, with reduced sedimentation and ease of handling, and are suitable for both indoor and outdoor applications.
Implementation Method 1
radically initiated emulsion copolymerization of ethylenically unsaturated monomers
Implementation Method 2
graft-active, water-soluble redox system is used as a radical starter for the radically initiated emulsion polymerization
Implementation Method 3
the effectiveness of the spray coating is also highly dependent on the chemical-physical properties of the sprayed surface
Data Source
AI summary
The invention relates to compositions for use in pest control, especially to insecticidal suspension concentrates and to spray solutions produced on the basis thereof, to methods for producing them, and to the use of said formulations for a long-term control of animal pests (arthropods) on various surfaces. The invention further relates to the use of certain polymer dispersions in pest control agents, especially their use to prolong the long-term effect of said agents when they are applied to surfaces. The invention further relates to the use of the compositions according to the invention for controlling parasites, especially ectoparasites, in animals.