Pittsburgh, Pennsylvania -- Bayer MaterialScience highlighted the advantages of its range of "100-percent solids acrylated allophanate oligomers" in UV coatings at the recent RadTech UV/EB 2010 Technology Expo and Conference in Baltimore, Maryland.
Presenting the paper: Acrylated Allophanate Oligomers That are 100-percent Solids with Low Viscosity and High Functionality, Michael Dvorchak, strategic technology manager, UV cure oligomers & polyurethane dispersions at BMS, discussed how allophanate-based oligomers compare in common tests with the performance of isocyanurate-based oligomers.
Outdoor stability, application on engineered plastics, weathering data, success of direct-to-metal applications and salt spray tests were also covered, an 8 June BMS statement said.
"Through our testing, we have found that acrylated allophanate resins demonstrate good stability in accelerated weathering tests and can endure more than 240 hours in the salt fog test," said Dvorchak. "Overall, new acrylated allophanate resins give the formulator more opportunities to meet the challenges of better performance and environmental compliance due to their low viscosity and high functionality," Dvorchak added.
According to BMS, allophanate polyisocyanate chemistry was originally developed in the 1990s to produce low viscosity resins allowing for higher solids formulations in conventional 2K polyurethane coatings. Advantages included "low viscosity and reduced crosslink density due to reduced isocyanate functionality, which allows for greater freedom in designing new high solid systems," the statement said. (RD)