Specialty additives - SPB-100 / RUVA-93 / 3,5-DMP
Otsuka Chemical Co. Ltd. manufactures several specialties which can be used as additives for plastic formulations:
SPB®-100 is a highly efficient halogen-free flame retardant. It is used as an additive for epoxy resins and polycarbonates, as well as other engineering and high performance polymers. SPB®-100 shows a great stability at high temperatures and a predominant resistance to hydrolysis due to its sterically protected, highly packed molecule. Its main uses are in high value-added products for transportation, electric & electronic and medical devices applications.
RUVA®-93 is a reactive UV-A protective agent that can be copolymerized with acrylic and styrenic monomers. It integrates in the polymer chain, so it does not bleed out to the resin surface, shows no transpiration effect at high temperatures. Furthermore, it cannot be extracted by water, acid or base solutions, alcohols, solvents or oils. RUVA®-93 provides excellent and time durable stability against UV-A radiation to end plastic products like thin films, fibers, inks or coatings.
3,5-Dimethyl Pyrazole (3,5-DMP) is a blocking agent for Isocyanates, that can be used in the manufacturing of 1-component Polyurethane systems. Unlike other alternative blocking agents like MEKO or Caprolactam, 3,5-DMP features a low unblocking temperature (110-120 ºC) which helps in keeping very good stability and lower yellowing/ageing for the end product. This is useful for end applications which are sensitive to temperature like coatings, etc.