Dow Corning has rolled out a new resin designed to improve the chemical resistance and flexibility of polysiloxane coatings beyond that of traditional epoxy topcoats.
Dow's 3055 Resin can be used in a variety of protective coatings.
Hybrid coatings formulated with the new 3055 Resin have shown long-term flexibility and improved chemical, thermal, UV, corrosion and moisture resistance compared to epoxy and two-component polyurethane systems, the manufacturer says.
Dow Corning calls 3055 Resin “the first of a new family of organofunctional products.”
Low VOC, High Performance
The resin allows manufacturers of high-performance paints and coatings to formulate low-VOC polysiloxane coatings with urethane, epoxy, polyester, alkyd, amine and acrylic systems using amine functionality.
Unlike moisture-cured polysiloxanes, 3055 Resin does not require titanate/tin catalysts or ambient moisture to cure and thus does not contribute to volatile byproducts that can cause film stress and adhesion loss, the manufacturer says.
Polysiloxane coatings with 3055 Resin “have similar physical properties” to two-component polyurethane coatings but show better corrosion resistance, offering “the potential” to use a two-coat polysiloxane system instead of a three-coat, two-component polyurethane topcoat, according to Dow Corning.
Protective Coating Applications
The resin can be used in a wide variety of protective coating applications, including fire-resistant and intumescent coatings, composite polymers, industrial adhesives, and high-temperature coatings, according to the company.
Dow Corning offers a comprehensive selection of silicon-based additives, resins and binders for the coatings industry.
More information: www.dowcorning.com/coatings.