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Solventborne 2-pack (2K) epoxy-amine coating systems have for many years been commonly used to formulate high performance protective coatings such as metal anti-corrosion primers and concrete floor coatings. However, due to the concerns linked to their high volatile organic compounds (VOC) contents, waterborne alternatives with comparable performance are needed.
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Vinyl coatings technology was pioneered shortly after World War II to control the corrosion on steel dam gates along the Mississippi River. Previously, oil-based technology had resulted in paints that performed well on atmospheric exposed areas of the dams but failed quickly in the areas immersed in water. By the mid-1950s, their proven durability had made vinyl coatings the industry standard for marine applications.
As VOC regulations continue to drive coatings development, waterborne alkyds are progressively being utilized further due to their attractive environmental profile. Advancements in waterborne alkyd chemistry have provided the first waterborne biobased resin for pavement marking coatings. Through strategic selection of alkyd monomers and the appropriate balance of the emulsification aids, a shear stable alkyd latex resin that shows exceptional performance in waterborne traffic marking formulas has been developed.
Gel coat has traditionally been used in environments where color, gloss and relative long-term performance are important. This premise is still true today; however, a much more advanced technology has been developed that provides improved characteristics of color and gloss stability, higher mechanical properties and zero Volatile Organic Compounds (VOC’s).
Coatings designed for heavy duty applications in the maintenance and protective coatings market are exposed to aggressive environments such as aggressive chemical solvents, marine atmospheres, UV light, abrasion, among others. In the US as well as other areas of the world, coatings designed for these applications have been primarily solvent-borne.
The spray-applied, two-component, ambient-cured polyurea, which features no VOC’s and low odor, can be applied at colder temperatures than current available coatings. This wider temperature application range extends the season for restoring outdoor concrete substrates. The technology provides quick dry times; leading to faster return-to-service and helping applicators and owners meet tight deadlines.
This work provides an overview of solution vinyl coating history and formulation as well as results and discussion for preliminary testing. Corrosion performance and material properties using modern laboratory techniques are needed to provide a benchmark for the development or evaluation of next generation polymer coatings that may someday provide a green alternative to the legacy vinyl systems.
Silicone alkyds are single-component (1K) systems and do not require the mixing of components before application. These systems are easy for sailors to apply (via brush or roll), have an indefinite pot-life in a closed can, and will cure under harsh marine conditions, which are why these coatings have been utilized on the exterior topsides of Navy surface ships since the early 1960s. However, these “user friendly” coatings provide limited color and gloss retention, limited resistance to shipboard hydrocarbons, and limited resistance to staining from running rust and soot.
Provides guidance and best practices to users of interim, or temporary, coatings for corrosion protection of metals, including performance criteria, selection, surface preparation and application, evaluation of coatings, and other usage requirements. Quality control criteria are listed to enable the manufacturer and user to select appropriate test procedures to maintain prescribed standards. The standard is intended to assist the new buyer or user as well as the experienced user of interim coatings in the proper selection and evaluation of these coatings.
Purpose of this report: • Explain the history of South Coast Air Quality Management District (SCAQMD) Rule 1113 – Architectural Coatings and the process that SCAQMD goes through to lower Volatile Organic Compounds (VOC) in architectural coatings. • Report on progress toward achieving low-VOC products with respect to the coating categories subject to Rule 1113 limits. • Report on progress on Reactivity and Availability assessment of solvents found in architectural coatings. • Report on future activities with regard to architectural and industrial maintenance coatings within the South Coast Air Basin.
PURPOSE OF THIS REPORT: • Explain the history of South Coast Air Quality Management District (SCAQMD) Rule 1113 – Architectural Coatings and the process that SCAQMD goes through to lower Volatile Organic Compounds (VOC) in architectural coatings. • Report on progress toward achieving low-VOC products with respect to the coating categories subject to Rule 1113 limits. • Report on progress on Reactivity and Availability assessment of solvents found in architectural coatings.
Eco-friendly technologies are already on the rise in most marine and offshore industries. Ship owners, shipbuilders and paint manufacturers have seriously considered reduction of VOCs (Volatile Organic Compounds) and CO2 emission. Also, IMO (International Maritime Organization) has enacted new regulations through MEPC (Marine Environment Protective Committee) 63 in 2011.