Conformable Cyanoacrylate Elastomer Coating for Skin
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Solution Overview
Problem
Conventional skin barrier products, including occlusive pastes and cyanoacrylate-based coatings, are messy, interfere with ostomy device securement, and are brittle, lacking flexibility and durability on moist skin surfaces.
Innovation Solution
A conformable coating composition combining a polymerizable cyanoacrylate monomer, an elastomer, and a volatile liquid, which forms a durable, flexible film that inhibits skin surface adhesion and provides hemostatic properties without being brittle, using alpha-cyanoacrylates and siliconized rubber with high elastomer content and specific volatile solvents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If cyanoacrylate-based coatings are used to form a durable barrier film on skin, then the coating provides strong adhesion and durability, but the coating becomes brittle and lacks flexibility on skin surfaces
Solution Approach 1:
The patent combines cyanoacrylate polymer with elastomer particles to create a composite coating material. The cyanoacrylate provides strong adhesion and durability, while the elastomer particles dispersed throughout the matrix provide flexibility and conformability to skin surfaces. This composite structure resolves the contradiction by integrating two materials with complementary properties.
2Productivity
If cyanoacrylate monomer is used quickly to form a film over skin, then the coating forms rapidly even over moist skin, but there is a risk of adhering two skin surfaces together
Solution Approach 1:
The coating composition is designed with different components serving localized functions: the cyanoacrylate monomer provides rapid film formation, while the elastomer particles and volatile liquid specifically address the adhesion problem at skin surfaces. The elastomer particles create a non-tacky surface layer that prevents skin surface adhesion while maintaining rapid overall coating formation.
Solution Approach 2:
The elastomer particles act as an intermediary between the cyanoacrylate polymer matrix and the skin surface. They modify the surface properties of the coating to prevent excessive adhesion between skin surfaces while allowing the cyanoacrylate to maintain its rapid film-forming capability. The volatile liquid also serves as an intermediary to control surface tackiness during the drying process.
3Reliability
If conventional occlusive barrier pastes are used to protect skin, then the skin is protected from moisture and enzymes, but the products are messy to apply and clean up and interfere with ostomy device securement
Solution Approach 1:
The coating utilizes phase transition from liquid to solid film through solvent evaporation. The composition is applied as a liquid that quickly forms a solid protective film as the volatile liquid evaporates. This provides the reliability of a protective barrier with the ease of operation of a liquid application, eliminating the messiness of traditional pastes and allowing easy donning of ostomy devices.
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 coating provides a flexible, durable, and non-stinging barrier that maintains adhesion to skin while preventing adhesion between skin surfaces, with enhanced elongation capabilities and reduced tackiness, suitable for protecting and treating various skin and mucous membrane injuries.
Implementation Method 1
a conformable coating composition that comprises a polymerizable cyanoacrylate monomer, an elastomer, and a volatile liquid
Implementation Method 2
a polymerizable cyanoacrylate monomer... A coating formed from the conformable coating composition comprises a polymerized cyanoacrylate
Data Source
AI summary
The disclosed conformable coating provides a highly durable and resilient film useful for protecting and repairing surfaces such as skin and mucous membranes. The coating comprises 0.1% to 65% wt. of a polymerized cyanoacrylate monomer and at least 35% wt. of an elastomer phase. The conformable coating composition comprises a polymerizable cyanoacrylate monomer, an elastomer, and a volatile liquid. The cyanoacrylate monomer is 0.1 to 65% wt. of the nonvolatile portion, the elastomer in an elastomer phase is at least 35% wt. of the nonvolatile portion, and the volatile liquid is at least 40% wt. of the total composition.