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Materials Spotlight: FILMS & COATINGS (continued)
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Ceramic paints. These high temperature (>2500°F) paints are
designed for the protection of metals, ceramics and graphite from oxidation, chemical
attack, and gas corrosion, as well as contact reactions with molten metals, slags, salts,
fluxes and more. All coatings are formulated to permit easy application by brushing or air
spraying. Most formulations are usable in all atmospheres to above 2500°F, and are
water-based and ready-to-use. ZYP Coatings Inc, Oak Ridge, TN. 
Black conformal coating. This solvent- free, light-curing
coating cures faster than most clear UV coatings. The black color hides the board,
components and circuitry. Hard dry surfaces are available even under moderate intensity
lights. Called 9-984-B, this coating has a secondary heat curing capability. It is a
tough, abrasion-resistant resin with excellent electrical properties. Cure is easily
effected in seconds by exposure to longwave UV and visible light. Dymax Corp, Torrington,
CT. 
Black PVD coating. This company now offers Black Platinum, a
new color applied using the physical vapor deposition (PVD) process. PVD coatings are
applied on top of chrome-plated metal or ABS plastic substrates in specially designed
vacuum chambers. PVD surfaces are up to two times harder than tool steel, providing
lifetime resistance to abrasion and wear. The PVD layer is extremely thin and does not
materially change part dimensions. MPC Plating, Cleveland, OH. 
Epoxy-sealed thermoelectric coolers. Using this low density,
syntaxic foam epoxy resin, superior electronic encapsulation and moisture protection is
achieved. When cured, the material is completely uni-cellular, resulting in negligible
moisture absorption, and exhibits a low dielectric constant, low coefficient of thermal
expansion, low cure shrinkage and reduced thermal conductance. Coolers with this form of
sealing have a useable temperature range of -40° to 130°C. MELCOR Corp, Trenton,
NJ. 
Thermoplastic hot melts. Products 4278 and S1294-94 are
low-cost polyamides recommended for seam sealing and pleat separating during filter
assembly. Produced as uniform, amber-colored pellets, 4278 is a high-melt,
medium-viscosity system. S1294-94 is a low-viscosity, low-melt alternative. The hot melt
web adhesive, polyolefin-based PO106, exhibits improved bonding capabilities for paper
filter media. Bostik Inc, Middleton, MA. 
Anti-reflective coating. DURALAN II A/R was developed for flat
panel displays that are used in high ambient light environments. Ideal for use with
laptops and portable hand-held displays that are used outdoors, this coating helps improve
light transmission and enhances contrast. It can be combined with other DURALAN II filter
features to meet a variety of custom requirements. Filters for the smallest to the largest
commercial displays are available. Silver Cloud, Millville, NJ. 
Adhesive and sealant. Resbond 907GF 2300°F seals exhaust
ducts against corrosive chemicals and high heat. It cures in 4-12 hours to form a hard
ceramic with excellent resistance to chemicals, solvents, electricity, and oxidizing and
reducing atmospheres. This product has excellent adhesion to clean steel, stainless, iron,
ceramics, most metals, tadpole gaskets and more. It is ideal for use in any high
temperature assembly, production, repair or maintenance application. Cotronics Corp,
Brooklyn, NY.