N-Vinyl Lactam Polymer Additive for Sustained-Release Chemical Agents
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Solution Overview
Problem
Chemical agents often exhibit low persistence of effects and poor sensory experiences, such as short-lasting coolness, due to inadequate sustained-release properties.
Innovation Solution
A polymer additive containing 50 mol % to 100 mol % of an N-vinyl lactam-based monomer, with a specific average particle diameter and crosslinked structure, is used to enhance the performance of chemical agents by improving their sustained-release properties and sensory experiences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If conventional chemical agents are used, then basic functional effects are achieved, but persistence of effects and sustained-release properties are insufficient
Solution Approach 1:
The patent uses a composite gel structure formed by crosslinking N-vinyl lactam-based polymer with dicarboxylic acid or dicarboxylic acid anhydride. This composite material combines the polymer matrix with crosslinking agents to create a network structure that provides both extended duration of action and reliable sustained-release properties through controlled drug diffusion pathways.
Solution Approach 2:
The gel structure created by the crosslinked network forms a porous matrix that allows controlled release of medicinal agents. The porous structure provides channels for drug diffusion while maintaining gel integrity, enabling sustained-release over extended periods without compromising structural stability.
2Ease of operation
If chemical agents are applied, then functional effects are produced, but sensory experiences such as coolness sensation are poor
Solution Approach 1:
The crosslinked gel composite enhances sensory experience by providing a structured matrix that controls the release profile of sensory-active compounds. The gel network maintains consistent contact with the application surface while releasing active ingredients at controlled rates, improving both immediate sensory perception and prolonged sensation persistence.
Solution Approach 2:
By adjusting the crosslinking degree, polymer composition, and gel structure parameters, the patent optimizes the release kinetics of sensory-active compounds. This parameter control allows tuning of both the intensity and duration of sensory effects such as coolness sensation, addressing both sensory quality and persistence requirements.
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 polymer additive significantly enhances the persistence of effects and sensory experiences of chemical agents, providing a more prolonged and improved sensation of coolness and application feel.
Implementation Method 1
a gelling agent for a sustained-release chemical agent, which is used by absorbing a sustained-release chemical agent
Data Source
AI summary
Provided is an additive for a chemical agent, which is capable of improving the functions of various chemical agents. The additive for a chemical agent according to an embodiment of the present invention includes a polymer (I) containing 50 mol % to 100 mol % of a structural unit derived from an N-vinyl lactam-based monomer with respect to 100 mol % of structural units derived from all monomers, the additive for a chemical agent having an average particle diameter of 100 μm or less in a state of having been dried under a reduced pressure of 0.02 MPa or less at 100° C. for 1 hour.