Coating Substance and Dual Polymer Coating Assembly

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This patent describes a novel coating substance and dual-sided polymer-based coating assembly that can be applied to various substrates. The invention enables the creation of surfaces, such as filters or masks, that have both antibacterial and antiviral properties. It uses polymers with either positive or negative charges that are covalently bound to surfaces, ensuring long-term effectiveness against both viruses and bacteria. The dual-coating method applies different charged coatings to opposite sides of the substrate, preventing charge neutralization and maintaining broad-spectrum antimicrobial activity.

Use CasesContent extracted from patent full text and abstract with AI.

• Air filters with antiviral and antibacterial properties for HVAC systems, hospitals, vehicles, or airplanes
• Face masks providing simultaneous protection against viruses and bacteria
• Water and liquid filters for purification in drinking water or wastewater treatment
• Medical device coatings to prevent microbial biofilm formation
• Protective coatings for surfaces in public spaces or healthcare environments
• Extracorporeal membrane oxygenation (ECMO) device membranes to limit pathogen passage
• Food packaging materials with enhanced antimicrobial protection

BenefitsContent extracted from patent full text and abstract with AI.

• Provides simultaneous antiviral and antibacterial activity in a single assembly
• Covalent binding ensures high durability and long-term effectiveness of the coatings
• Minimizes risk of leaching and reduces health safety concerns compared to metal- or biocide-based coatings
• Simple manufacturing suited to both batch and continuous processing (e.g., roll-to-roll)
• Applicable to a wide range of substrate materials (polymers, metals, glass, textiles, etc.)
• Stable performance over time, enabling reuse and long storage life of coated products
• Scalable production using straightforward dip-coating or spray-coating processes
• Contributes to improved infection prevention in high-risk environments

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

The present invention relates to a coating substance (1, 7, 11), comprising: a polymeric core (2); a positively charged moiety (4) or a negatively charged moiety (4) forming part of the polymeric core (2) or being covalently bound to the polymeric core (2) either directly or via a first linker (3); and a surface-binding moiety (5) covalently bound to the polymeric core (2) either directly or via a second linker (3'); wherein the polymeric core (2) comprises a polymer chosen from the group consisting of hyperbranched polyglycerol, hyperbranched polyglycerol derivatives, polyethyleneimine, polyethyleneimine derivatives, polyallylamine, and polyallylamine derivatives; wherein the positively charged moiety (4) is chosen from amines, quaternary ammonium substituents, and amino groups; wherein the negatively charged moiety (4) is chosen from sulfate groups, sulfonate groups, carboxyl groups, phosphate groups, and phosphonate groups; wherein the first linker (3) and the second linker (3') are chemically identical and are a C4 to C16 alkyl residue; and wherein the surface-binding moiety (5) is chosen from a benzophenone residue and a catechol group.