Polyamide Hot-Melt Resin Granules for High-Capacity Active Ingredient Loading
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Solution Overview
Problem
Current polyamide hot-melt resins have limited capacity to incorporate significant quantities of lipophilic active ingredients, restricting the control of active ingredient diffusion and increasing the risk of sequestration, with most capable of incorporating only up to 10-15% by weight, which is insufficient for effective dosage and duration control.
Innovation Solution
Development of polyamide hot-melt resin granules with a chemical structure consisting of dimerized fatty acids and diamines, having a specific [NH2]/[COOH] molar ratio below 5, and incorporating active ingredients in quantities between 0.01% and 55% by weight, allowing for higher liquid incorporation capacity and controlled diffusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polyamide hot-melt resins are used to incorporate active ingredients, then adhesive strength and gelling properties are improved, but the liquid incorporation capacity is limited to below 10-15% by weight
Solution Approach 1:
The patent modifies the chemical parameters of polyamide hot-melt resins by adjusting the [NH2]/[COOH] molar ratio to below 5 and selecting specific diamine chain lengths (2-14 carbons) to enhance liquid incorporation capacity while preserving adhesive properties
Solution Approach 2:
The patent creates a composite system combining polyamide hot-melt resin with specific residual functional group ratios and lipophilic active ingredients, where the composite achieves both high adhesive strength and high liquid incorporation capacity (20-55% by weight)
2Manufacturing precision
If polyamide hot-melt resins with high liquid incorporation capacity are used, then control of active ingredient diffusion is improved, but the risk of sequestration increases
Solution Approach 1:
The patent optimizes the [NH2]/[COOH] molar ratio parameter to below 5, which creates an optimal balance between liquid incorporation capacity and active ingredient release behavior, enabling diffusion control while minimizing sequestration through precise chemical composition control
3Ease of manufacture
If polyamide hot-melt resins are shaped by common plastics processing techniques, then ease of manufacture is improved, but the capacity to incorporate significant quantity of active ingredient is limited
Solution Approach 1:
The patent maintains the thermoplastic properties of polyamide hot-melt resins while modifying the residual functional group ratio to below 5, enabling both high active ingredient incorporation (up to 55% by weight) and compatibility with standard processing techniques like injection molding and extrusion
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 enables the incorporation of a substantial quantity of active ingredients, enhancing control over diffusion and reducing sequestration risks, thereby providing a more effective and reliable delivery of active ingredients in molded items.
Implementation Method 1
the polyamide hot-melt resin incorporates an active ingredient in quantities of between about 0.01 and about 55% by weight of weight of the resin
Implementation Method 2
enhancing control over diffusion
Data Source
AI summary
The present document describes a polyamide hot-melt resin having a chemical structure consisting of dimerized fatty acids and diamines, loaded with an active ingredient. The dimerized fatty acids may have 12 to 24 carbons and the diamines may have 2 to 14 carbons. The amine residual functional groups and acid residual functional groups within the polyamide hot-melt resin may have a [NH2]/[COOH] molar ratio below 5, and the active ingredient may be incorporated in quantities of between about 0.01 and about 55% by weight of weight of the resin. The present document also describes items molded from the polyamide hot-melt resins, and processes of preparing the polyamide hot-melt resins.