Poly(ester urethane) antibacterial polymers with high efficacy and low toxicity

Overview

This technology offers a new class of polymer-based antibacterial materials, specifically poly(ester urethane)s and polyurethanes, designed to replace conventional quaternary ammonium compounds (quats). While quats are widely used as antibacterials, their significant toxicity limits their applicability. These polymers use primary amine groups to disrupt bacterial membrane structures, achieving strong antibacterial performance without the toxicity associated with quaternary ammonium species. The polymeric nature of these materials enables effectiveness at low concentrations, reduces the likelihood of bacterial resistance, and minimizes toxicity to mammalian cells.

Technical specifications

• Mechanism of action: Primary amine groups on the polymer backbone disrupt bacterial cell membranes, causing cell death
• Broad-spectrum activity: Poly(ester urethane)s are effective against both Gram-positive and Gram-negative bacteria
• Targeted efficacy: Polyurethanes show particularly high efficacy against Gram-negative bacteria
• Low effective concentrations: Polymeric structure allows antibacterial activity at reduced dosages compared to small-molecule quats
• Low mammalian cell toxicity: Significantly less toxic than quaternary ammonium-based antibacterials
• Reduced resistance development: Polymeric design lowers the incidence of bacterial resistance compared to conventional antibacterials

Technology readiness level

The polymers have been validated through laboratory testing against both Gram-positive and Gram-negative bacteria, with results published in peer-reviewed journals. Future validation activities include evaluating bacterial killing efficacy as a function of dilution and time, assessing mammalian cell toxicity under application-specific conditions, and providing synthesis scale-up information along with cost-to-market analysis for potential commercial partners.