Although much of America’s infrastructure remains standing, many of the highways and bridges were not designed for life spans of over 40 to 50 years. Consequently, steel bridges all over the country are crumbling and/or corroding, posing a risk to users, as well as the environment.
Testing of waterbased FEVE based coatings has been ongoing in the US for the last several years. Test systems have included waterbased 1K for light industrial, air dry touch-up paint, roof coatings, and even wood coatings as well waterbased 2K systems for DTM and industrial applications. This excerpt focuses on 2K waterbased systems.
LUMIFLON FEVE resins are used in a wide range of applications. This is in part due to the variety of FEVE resins available. Besides the standard solvent based resins, FEVE resins are offered as solid flakes as well as water-based emulsions and dispersions. Achieving the high level of weatherability of a solvent-based resin can be difficult when it comes to water-based systems. Many water-based resins require surfactants which typically increase the hydrophilic nature of the coating resulting in lower weathering performance.
The American Architectural Manufacturers Association (AAMA) is a recognized leader in the fenestration industry through product certifications and standards development. A series of AAMA tests have been conducted using organic coatings on aluminum extrusions and panels, resulting in 3 standards by which coatings can be attributed: AAMA2603, AAMA 2604 or AAMA 2605. FEVE resins have been proven to exceed AAMA 2605 standards, which are an excellent choice for coatings for projects that demand high performance materials.
Fluorinated resins are known for high performance, particularly in long term, exterior durability. Fluoroethylene vinyl ether or FEVE resins, a family of fluorinated resins, have a unique alternating copolymer structure allowing them to be dissolved in solvent as well as emulsified in water for formulating liquid coatings. As environmental initiatives are becoming less compulsory and industry is taking proactive measures to protect the environment, waterborne and high solids paint is ever increasing in demand.