Microcapsule Permeability Control via Amine-Modified Vinyl Monomers
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Solution Overview
Problem
Existing microencapsulation methods are limited by high permeability in products with surfactants or water, restricted formulation capabilities, limited breadth of encapsulable agents, stability issues, and inadequate deposition on treated surfaces, leading to premature release or mechanical instability of encapsulated agents.
Innovation Solution
The development of microcapsules formed through oil-in-water or water-in-oil emulsifications using amine modified polyvinyl monomers and bi- or polyfunctional vinyl monomers with free radical initiators, which control permeability by adjusting cross-linking time and temperature, allowing for low leakage or controlled release profiles and adherence to surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional microencapsulation methods are used, then capsule formation is achieved, but high permeability occurs in products with surfactants or water leading to premature release
Solution Approach 1:
The patent changes the chemical composition parameters of the capsule wall by using amine-modified polyvinyl monomers with bi- or polyfunctional vinyl monomers, and controls physical parameters such as cross-linking time and temperature to achieve low permeability and controlled release
Solution Approach 2:
The invention creates composite capsule walls by combining amine-modified polyvinyl monomers with bi- or polyfunctional vinyl monomers through cross-linking reactions, forming a composite material structure that provides both stability and controlled permeability
2Reliability
If conventional microencapsulation methods are used, then capsule formation is achieved, but mechanical instability occurs leading to inadequate deposition on surfaces
Solution Approach 1:
The patent adjusts cross-linking parameters (time and temperature) to optimize the balance between mechanical strength and surface adherence, achieving both stability and proper deposition
3Adaptability or versatility
If conventional microencapsulation methods are used, then capsule formation is achieved, but restricted formulation capabilities and limited breadth of encapsulable agents occur
Solution Approach 1:
The amine-modified polyvinyl monomer system provides universal encapsulation capability for various agents (surfactants, oils, fragrances, functional materials) through a single cross-linking mechanism, enhancing formulation versatility without requiring different processes for different materials
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 resulting microcapsules exhibit improved permeability control, stability, and adherence, enabling the encapsulation of a wide range of agents with targeted release profiles and enhanced performance in consumer products.
Implementation Method 1
heating for a time and temperature sufficient to decompose the free radical initiators in the oil and water phases
Implementation Method 2
decompose the free radical initiators in the oil and water phases; thereby forming microcapsule wall material at the interface of the water and oil phases
Implementation Method 3
control permeability by adjusting cross-linking time and temperature
Data Source
AI summary
The present application relates to encapsulated benefit agents, compositions comprising such encapsulated benefit agents and processes for making and using compositions comprising such encapsulated benefit agents. Such encapsulated benefit agents eliminate or minimize one or more of the drawbacks of current encapsulated benefit agents and thus provide formulators with additional perfume delivery opportunities.