Insecticidal Tablet Composition for Extended Release Without Effervescence

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Solution Overview

Problem

Existing insecticidal formulations lack an efficient and extended-release mechanism for controlling insect populations, particularly mosquitoes, without using effervescent layers.

Innovation Solution

A tablet composition comprising 7.0-8.0 wt% active ingredient, 78-85 wt% plaster, 9-10 wt% water-soluble binder, and 0.7-0.8 wt% non-water-soluble binder, with a diameter of 7-12 mm and hardness up to 220 N, designed to provide extended insecticidal control without an effervescent layer.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Duration of action of moving object

If traditional insecticidal formulations are used, then immediate insecticidal effect is achieved, but extended-release capability is lacking

Engineering Contradiction:

Improveinsecticidal control durationVSAvoidinsect mortality rate

Core Design Contradiction:

Duration of action of moving objectVSProductivity

Solution Approach 1:

The tablet is segmented into multiple functional layers: an effervescent layer containing acid and carbonate components for rapid CO2 generation, and a core layer containing the insecticide. This segmentation allows the tablet to provide both immediate effect (through rapid effervescence and insecticide release) and extended-release capability (through controlled dissolution of the core layer over 12+ weeks).

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The tablet is pre-prepared with effervescent components (acid and carbonate) in specific ratios and distributions before use. When placed in water, the preliminary arrangement of these components enables automatic activation of the effervescence mechanism without additional input, providing immediate insecticidal action followed by extended release from the core layer.

Inventive Principle:

Principle #10Preliminary action

2Duration of action of moving object

If effervescent layers are added to achieve extended release, then release duration is improved, but tablet complexity increases

Engineering Contradiction:

Improveinsecticidal control durationVSAvoidtablet structure complexity

Core Design Contradiction:

Duration of action of moving objectVSDevice complexity

Solution Approach 1:

Multiple functions are merged into a single tablet structure: the effervescent layer combines acid components, carbonate components, and binders in one integrated layer, while the core layer combines insecticide, excipients, and release-controlling materials. This merging achieves extended-release functionality without requiring multiple separate components or complex assembly procedures, maintaining manufacturing simplicity while providing 12+ week control duration.

Inventive Principle:

Principle #5Merging (Combining)

3Stability of the object's composition

If tablet hardness is increased to maintain structure, then structural stability is improved, but active ingredient release is hindered

Engineering Contradiction:

Improvetablet structural stabilityVSAvoidactive ingredient release rate

Core Design Contradiction:

Stability of the object's compositionVSProductivity

Solution Approach 1:

Different hardness characteristics are applied to different regions of the tablet: the effervescent layer is formulated to be relatively soft and rapidly dissolvable to enable quick activation, while the core layer maintains sufficient structural integrity for extended release. This local differentiation of material properties allows the tablet to simultaneously achieve structural stability during storage and controlled release during use, with the softer effervescent layer facilitating ingredient release without compromising overall tablet integrity.

Inventive Principle:

Principle #3Local quality

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 achieves at least 80% mortality within 24-48 hours and maintains insecticidal efficacy for up to 12 weeks by releasing the active ingredient over an extended period.

Implementation Method 1

9 wt % to 10 wt % of a water-soluble binder

Methodology Applied

Scientific EffectSolubility: Solvation

Implementation Method 2

78 wt % to 85 wt % of a plaster

Methodology Applied

Scientific EffectAbsorption: Absorption (physical)

Data Source

PatentUS12543731B2Insecticidal tablet compositions

Publication Date: 2026.02.10 CLARKE MOSQUITO CONTROL PRODUCTS INC

AI summary

Exemplary tablet compositions may comprise 7.0 weight percent (wt %) to 8.0 wt % of an active ingredient; 78 wt % to 85 wt % of a plaster; 9 wt % to 10 wt % of a water-soluble binder; 0.7 wt % to 0.8 wt % of a non-water soluble binder; and 0.9 wt % to 1.0 wt % of a lubricant. A diameter of the tablet composition may be no less than 7 mm and no greater than 12 mm. A hardness of the tablet composition may be no greater than 220 Newtons (N).