SpeedBlock 327

SpeedBlock 327 by Lambson (Sartomer) is a 2,4-di-tert-butyl-6-(5-chloro-2H-benzo-triazol)-phenol. Acts as a UV absorber. It has absorption bands in the 200-230nm & 300-360nm ranges. It has very low transmission of long-wavelength UV radiation. Excellent stability to heat as it has low volatility at high processing temperatures. Compatible with styrene homo- and co-polymers, acrylics, unsaturated polyester, polyurethane, polyvinylbutyral, polyvinylchloride, polyolefins, polyacetals and elastomers. Can be used alone or with additives such as hindered light stabilisers and antioxidants. Used in adhesives. Typical addition level of SpeedBlock 327 ranges from 0.1-1.0% depending on applications.