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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.
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Many protective coatings markets have recently seen high demand for higher performing coatings or linings. For example, with enhanced oil recovery, many more assets are now used throughout these processes from the oil / water separation tanks to the acid injectors. The temperatures are higher and corrosive environments are more severe. Formulation chemists are working hard at trying to push the extent of the performance of typical resin systems, but it seems that most of the development has been done and the extent of the performance available has been maximized.
The presentation reports about a nationally funded 3-year R&D project on the effects of edge geometry and coating type on the corrosion protection performance of organic coatings on edges with particular attention to ballast water tank applications. Core of the presentation is the description of the testing scenarios, the introduction of three assessment methods, and the discussion of the results. Testing methods included the long-term testing of samples in a specially designed IMO chamber, the utilization of electric impedance spectroscopy and DFT measurements on polished cross sections of coated edges.
The long term performance of any coating system will be limited by the ability of the applicator to achieve the best combination of surface preparation, application, and curing. In oil and gas facility construction, sometimes the most appropriate coating system is not the best available technology, but rather the system that ensures the highest probability for success based on the environmental conditions during application. An example is presented in which a zinc rich epoxy coating provides clear advantages over the specified inorganic zinc silicate due to circumstances specific to the particular application.
The Cool Roof Rating Council (CRRC) is a non-profit organization, which maintains a rating program for roofing materials. The CRRC also addresses many current technical and regulatory issues involving cool roofs and continues to provide an independent third-party ratings system in an arena that is continually evolving. The CRRC/RCMA (Roof Coatings Manufacturers Association) substrate study, initiated in 2008, is an example of an investigation designed to address an important technical issue. This study aims to evaluate the influence of roof substrates on reflectance and emittance properties of cool-roof coatings, in the field over a three-year period.
Corrosion is a durability concern for any unprotected structural steel from its exposure environment and coatings are widely used for corrosion protection. Zinc-rich primer-based three-coat (ZRP) systems are the most widely used for structural steel, since 1980’s. However, these coating systems often require regular maintenance. So, there is always interest to develop durable novel coating systems to reduce the maintenance cost.
High-solids, two-component acrylic polyurethane coating formulations were prepared using a new low-viscosity, reactive diluent that incorporates directly into the final polymer network. The resulting acrylic coatings were found to increase the solids content of formulations without compromising mechanical performance. Acrylic polyurethane coating samples containing the diluent were evaluated for weatherability performance via QUV and environmental chamber studies.
This presentation will compare and contrast several anti-corrosive tidal zone coatings developed under a Navy SBIR program. Requirements for the coating included no VOC’s, surface tolerance to chlorides and water, fast cure to avoid washout by tides and waves, and thick build properties. Various trials of the material on dock sheet pilings and cooling tower fallout zones will be illustrated as well as accelerated lab test data.
Cashew Nutshell Liquid (CNSL) is a non-edible, renewable biomaterial extracted from the honeycomb-like structure of the cashew nut. Its main component, cardanol, is produced by the decarboxylation of CNSL and it contains a highly hydrophobic aliphatic side chain. Cardanol is used in the synthesis of phenalkamines, which are widely used in marine, protective and industrial coatings applications. Historically, phenalkamines have been used in solvent systems, but recently, a new technology was developed that enables a very hydrophobic phenalkamine to be stably packaged in water.
Two coatings were developed for the intended purpose of maintaining steel sheet pile at the waterfront. The new splash zone coatings are free of VOC’s and HAP’s thereby providing a more environmentally friendly alternative to the standard coal tar epoxy system. The new coatings are also more abrasion and impact resistant and applied at more than twice the thickness of coal tar epoxy. All of these factors add up to an anticipated service life of 3 to 4 times that of coal tar epoxy leading to reduced life cycle costs.
In contrast to the Hipster projected or “posed” image based solely upon appearance in lieu of substance, a company’s brand-image projected by paints & coatings requires performance derived from consistently sound chemistry and manufacturing. The protective paints and coatings on the façade of commercial buildings are a significant aspect of the image associated with the owner organization.
BASF has developed a novel crosslinking isocyanate-free coating technology based on carbodiimide chemistry. A polycarbodiimide crosslinker with suitable functionality for coating applications and ultra-low free monomeric isocyanate has been introduced to the market. We formulated a 60% solids industrial primer using the new isocyanate-free coating technology and applied it on different metal substrates.