Pittsburgh, Pennsylvania -- Bayer MaterialScience llc has developed a new aliphatic prepolymer specifically for "high-build moisture-cure urethane (MCU)" coatings used to protect structural steel in corrosive environments like marine applications and chemical plants, BMS said 1 Apr 2010.
According to BMS, the use of MCU topcoats has been limited by low-build films that made it difficult to achieve the required coating thickness.
Typical aliphatic MCU topcoats are usually applied between 2-3 mils dry film thickness (DFT), BMS said, adding that its new MCU topcoat can be applied up to 8 mils DFT.
Other benefits of the new prepolymer include improved sag resistance, application in hot and humid climates and low VOC (volatile organic compound) content, BMS said.
"After several years and extensive testing we've developed a solution that allows applicators to use a high-build MCU topcoat that makes their job a little easier," said Ahren Olsen, R&D specialist for BMS. "This next generation of MCU topcoats expands the market into climates where traditional systems couldn't be previously used," he added. (RD)