Self-healing polyurethane coating with slippery properties

 
Scientists have been actively focusing on the development of polymers able to "feel" a damage and provide healing during their use in various applications. Previous works have shown the potential use of this type of concept for coating application. In this work we propose to combine this property with slippery agents to provide self-healing slippery coatings. Self-healing PU (2K) has been specifically formulated with the addition of agents to provide durable slippery effect. The coatings are based on the use of spontaneous self-repairing polymeric resins which replaces part of the PU. A special emphasis is made on the design of stiff and remandable polymeric resins that can repair under mild conditions using different type of stimulii (such as ambient humidity or outdoor light). Despite having an effective self-healing activity, the balance between soft segments, bringing mobility, and dense network, bringing mechanical and chemical properties, appears to be a key parameter.