Prevent Polyurethane resin from yellowing with FDA approved products

Usually our Omnistab UV 571, UV 1, AN 1135 are suitable products for Polyurethane resin, but if you are looking for FDA approved material, we can give you another recommendation: We'd like to recommend they try combination of Omnistab UV 329 + Omnistab AN 245. Both additives are approved by FDA. Omnistab UV329 has good transmittance in the visible light range, so it works well in light and transparent products. Its maximum dosage is 0.5%. Omnistab AN 245 is a kind of asymmetrically hindered phenolic antioxidant, which could slow down the phenolic yellowing phenomenon. Its maximum dosage is 0.3%.

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