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Speedblock 327

Technical Datasheet | Supplied by Lambson (Sartomer)
Speedblock 327 by Lambson (Sartomer) is 2,4-di-tert-butyl-6-(5-chloro-2H-benzo-triazol)-phenol. Acts as an UV absorber. It has absorption bands in the 200-230nm & 300-360nm ranges. It can be used alone or with additives such as hindered light stabilizers and antioxidants. It has very low transmission of long-wavelength UV radiation. Exhibits excellent stability to heat as it has low volatility at high processing temperatures. Speedblock 327 is compatible with styrene homo- and co-polymers, acrylic polymers, unsaturated polyester, polyurethane, polyvinylbutyral, polyvinylchloride, polyolefins, polyacetals and elastomers. Recommended dosage is 0.1-1.0%, depending on the substrate, processing conditions and applications. It has a shelf life of 2 years.
Product Type
Light Stabilizers / UV Absorbers > Benzotriazoles
Chemical Composition
CAS Number

Compatiblity with other products

Find products that are predicted to be compatible with Speedblock 327.

This list of compatible products is generated out of estimated HSP values. A practical determination of these HSP values would provide higher certainty.
Learn more about Hansen Solubility Parameters (HSP) and their use in predictive formulation.

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