Coatings World - October 2011

based on a successful four-year test conducted previously.

NuSil Technology
introduces R-1182 acetoxy-
cured, low coefficient of
friction silicone coating

NuSil Technology LLC, a formulator and manufacturer of silicone compounds for engineering industries, introduced R- 1182, a one-part, acetoxy-cured, low-co-efficient-of-friction silicone coating.

R-1182 is dispersed in tert-butyl acetate, a non-volatile, organic component solvent. This smooth coating is curable at room temperature and, once cured, chemically bonds to the silicone elastomer substrate, mimicking its mechanical properties. The result is a smooth and durable, yet flexible, non-blocking coating that resists abrasion, static friction and friction from moving, sliding and rubbing parts.

R-1182 decreases the coefficient of friction of a cured silicone surface by an average of 85 percent as compared to a non-coated silicone surface, and has an average contact angle of 106 degrees, the company said.

“In a cured state, silicone has a natu-
rally tacky surface that tends to pick up
dust, dirt and grime,” said Brian Burkitt,
product director, engineering materials.
“For ease of cleaning, R-1182 can be ap-
plied to prevent the accumulation of for-
eign object debris (FOD).”
R-1182 can be used for applications
in which silicones come in contact with
each other or other surfaces, such as pre-
cision molded parts, molded rubber
stoppers, O-rings, gaskets, accordions or
cables/cable coatings.

HMG Paint introduces non-
isocyanate acrylic topcoat
formulation, Nisocoat 2

Nisocoat 2, a new non-isocyanate acrylic coating, which offers similar technical performance to two-pack polyurethane finishes, with none of the health and safety concerns associated with isocyanates is the newest product from HMG Paints Ltd., the UK’s largest independent paint manufacturer.

A tough, chemically resistant topcoat, it is available in a complete range of BS, RAL, automotive and fleet colors, as well as a

clear coat gloss. It can be applied to virtually every metal, including machine tools, stainless and galvanized steel, a variety of plastic substrates, such as UPVC and PU foam moldings, even certain timbers, when used with the recommended HMG primer or sealer system, the company said.

HMG Nisocoat 2 is a non-isocyanate 2k topcoat formulation for the professional finisher and refinisher, who wants a fast-drying, applicator-friendly, wear- and abrasion-resistant paint system, that gives an excellent finish straight from the spray gun, but where the use of traditional isocyanate technology is precluded, the company said. Nisocoat 2 is ideal for smaller industrial users currently using single-pack epoxies and machinery enamels, OEM’s needing a handy touch-up paint at the end of a production line, and the growing number of companies who find it harder to satisfy strict COSHH regulations related to the safe use of isocyanates.

Isocyanate-cured polyurethane finishes are used for a wide spectrum of industrial and automotive coating applications, because of their excellent gloss, hardness, adhesion and chemical resistance, as well as fast-drying properties that allow improved spray shop productivity. However, exposure to isocyanates at both mixing and application stages can give rise to sensitization and irritation of the respiratory system, so suitably designed spray booths, appropriate PPE and respiratory protection, correct workplace procedures and regular operator training are mandatory. Current COSHH regulations require employers to prevent or adequately control exposure and, if these standards become too onerous or costly to comply with, then industry bodies like the British Coatings Federation recommend substituting two-pack polyurethane with a less hazardous product.

That is the role of isocyanate-free Nisocoat 2, according to the company, since it withstands chemicals, solvents, water, corrosion and abrasion much like a 2k polyurethane, yet is faster drying than the usual alternative of a single-pack epoxy. It is applied by conventional, HVLP or electrostatic spray and, while suitable air-fed respiratory equipment should be worn when spraying, it is non-hazardous when

being mixed and can even be safely applied by brush. Nisocoat 2 is touch dry within 15 minutes, hard dry in four hours and attains its fully-cured properties in seven days at ambient temperature, although force drying by oven or infrared will reduce this. It can be over coated wet-on-wet and there are four standard gloss levels, down to matt and semi-matt, to suit differing user requirements.

LINE-X launches bacteria-
resistant antimicrobial
van-liner coating

With increasing concern over infectious bacteria such as MRSA, E-coli and salmonella, LINE-X has launched an optional antimicrobial coating to help the fight against bacterial invasion.

Harmful bacteria thrive on untreated surfaces, especially in food prep and healthcare industries. The LINE-X antimicrobial coating has been independently tested to ISO standards and proven to reduce up to 99.9 percent of bacteria (MRSA and E-Coli) over a two-hour period, the company said.

LINE-X are offering their new antimicrobial coating as a van liner across the multiple industries dealing with the risks of harmful bacteria such as health authorities, refuse and animal welfare.

LINE-X Protective Coatings Ltd. have a presence within the van lining market with its XS100 product that offers high tensile strength, a watertight/airtight seal preventing rust and corrosion, scratch and ding resistance, as well as a fast cure time and chemical resistance. The new antimicrobial liner increases adds bacteria fighting capabilities to LINE-X’s offering.

The LINE-X Antimicrobial Coating is an ideal interior lining for ambulances, waste-refuse trucks and all other transportation dealing with the possible infestation of bacteria, by preventing the bacteria’s growth. The antimicrobial additive within the liner continues to work in between clean downs so the LINE-X coating will continue to reduce bacteria when in consistent use, the company said.