Paints and Coatings

Abstract

Coatings are multi-component systems and surfaces/interfaces have a strong influence on their quality and play also an important role during paint application. Coating additives are used since many years successfully as "problem solvers" in coating formulations to overcome defects and in general to improve the overall quality. Many coating defects are closely connected with interfacial phenomena and therefore it is no surprise that oftentimes coating additives are surface active materials. Examples of typical coating defects are shown together with problem solutions using surface active coating additives. The development of coating additives is mainly driven by market needs. In the past excellent quality and performance had a very high priority. During the last 15 to 20 years the focus shifted more and more to ecological considerations. Less pollution of water and air is required and the range of raw materials from which the paint chemist can choose has shrunken (e.g., no more lead pigments, no more aromatic solvents). These changes are a constant challenge for additive producers. Coating additives normally do not trigger new developments in coatings but they can be the crucial factor to make a new and innovative coating system successful in the market.

Dyes and Pigments

“…The state of the art of paints and coatings, including pigments and extenders, has been reviewed (7).…”

Amine-free CO2-switchable hydrophilicity solvents and their application in extractions and polymer recycling

“…Many VOS are used in industrial processes such as reactions, extractions, and separations. 1–5 However, the problems of VOS related to health, safety, and the environment 6–13 are driving the search for viable alternatives. 14,15 The call for change is coming from environmental groups, researchers, industry, and regulatory agencies that are creating strict regulations governing or even banning the use of certain solvents.…”

Relationship between natural exposure testing and cyclic corrosion testing ISO 20340 for the assessment of the durability of powder-coated steel

“…The type of metal substrate, the expected working environment and the other operational, economical and aesthetical requirements determine the selection of the organic coating formulation, application method and thickness. For some applications, such as white goods, food and drink cans, sport equipment, etc.., organic coatings are formulated to provide a pleasant aesthetical appearance to the object, together with some level of corrosion protection [1–6]. For other applications, such as civil infrastructures, automotive, aerospace or marine applications, the specific organic coatings are formulated to protect the metal surface from a relatively harsh environment [7–9].…”