Acrylic Adhesive Composition with Crosslinked Polymer Particles for Water Vapor Permeability
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Solution Overview
Problem
Current adhesive matrices for medical dressings face a challenge in achieving high water vapor permeability while maintaining sufficient adhesive power, as improving breathability often compromises adhesive strength.
Innovation Solution
A composition combining an acrylic adhesive with crosslinked polymer particles having a carboxylate group density of 2.0-12.0 meq/g and an average pore size of 0.005-1.0 µm, optimizing water vapor diffusion and maintaining adhesive power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the adhesive matrix is perforated to improve water vapor permeability, then breathability is improved, but adhesive power is reduced due to limited contact surface
Solution Approach 1:
The patent incorporates particles of crosslinked polymer with controlled porosity (average pore size 0.003-1.0 μm) and specific carboxylate group density (0.1-12.0 meq/g) into the adhesive matrix. These porous particles create water vapor transmission pathways while the carboxylate groups provide adhesive functionality, eliminating the need for physical perforations that would reduce contact surface area.
Solution Approach 2:
The patent modifies the chemical parameters of the adhesive matrix by controlling the carboxylate group density and pore size distribution of the crosslinked polymer particles. By adjusting these parameters within specific ranges, the material achieves optimal balance between water vapor permeability and adhesive power without compromising contact surface area.
2Reliability
If crosslinked polymer particles with high carboxylate group density are added to improve water vapor permeability, then breathability increases, but adhesive power may be compromised
Solution Approach 1:
The patent identifies and controls critical parameters including carboxylate group density (0.1-12.0 meq/g), average pore size (0.003-1.0 μm), and particle content (0.1-50 parts by weight per 100 parts acrylic adhesive). By optimizing these parameters within specific ranges, the invention achieves the counterintuitive result of improving both water vapor permeability and maintaining adhesive power simultaneously.
Solution Approach 2:
The patent creates a composite material system combining acrylic adhesive with crosslinked polymer particles having specific porous structures and carboxylate group densities. This composite approach allows the porous particles to provide water vapor transmission pathways while the carboxylate groups contribute to adhesive functionality, resolving the contradiction between permeability and adhesion.
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 enhances water vapor permeability, promoting better wound healing by optimizing humidity levels without compromising adhesive strength, as demonstrated by increased water vapor absorption capacity and consistent adhesive power.
Implementation Method 1
optimizing water vapor diffusion and maintaining adhesive power
Implementation Method 2
enhances water vapor permeability, promoting better wound healing by optimizing humidity levels
Implementation Method 3
particles of a crosslinked polymer having a carboxylate group density of between 2.0 and 12.0 meq/g
Data Source
Figure 1
AI summary
The invention relates to a new composition comprising a solution of at least one acrylic adhesive and particles of a crosslinked polymer having a carboxylate group density of 2.0 to 12.0 meq/g and an average pore size of 0.005 to 1.0 μm, said composition being usable in particular for producing an adhesive matrix suitable for any device, for example for a medical device such as a patch, a film, a bandage or a dressing, preferably a dressing, or suitable for any functional textile device such as a sports article.