American Coatings Show 2018

Sessions Speakers Exhibitors Products Press Releases Show Specials Floor Plan Buzz

14.6 Improving Adhesion: A Continuing Challenge with Modern, Compliant Coatings (Room 240-242)

11 Apr 18
12:30 PM - 1:00 PM

Tracks: Session 14: Appearance and Functionality, Session 14: Novel Materials

Adhesion is one of the most important properties of both decorative and protective coatings. Coatings have to provide excellent adhesion to many different or even mixed substrates and even overcome the hurdles created by poorly prepared or cleaned surfaces. The adhesion between different paint layers is also critical to the long-term performance of industrial coatings. As the demand for better adhesion increases, and regulations continue to limit formulation freedom, additives that can help to improve adhesion become more critical. This can be particularly challenging for water-based and high solids formulations. There are many different approaches to improving the adhesion of paint, both chemical and mechanical. Polyester resins are a class of additives that can improve the adhesion of high solids and water-based coatings to different surfaces. These additives combine flexible polymer chain segments with different functional groups that can provide adhesion and interaction with different surfaces and binders to enhance adhesion and other physical properties of a coating formulation. Originally developed for solvent based coatings, newer generation polyester adhesion promoters have been developed for water-based and high solids applications. This paper will highlight a new, select class of polyester adhesion promoters and outline their improvement to adhesion in mainstream formulations. It will also give guidelines on how these can be formulated to support existing formulations and avoid extensive and costly reformulating efforts to improve adhesion.