Compatibility is the key to cost-effective light stabilizer systems for pigmented polyolefins

摘要

Hindered amine light stabilizers (HALS) are the primary means of stabilizing many polymers against the effects of light. Over the past two decades new and improved variations of this chemistry have made it possible to use plastics in an increasing number of critical applications. However, there is a vast array of plastic applications that are not technically demanding but do need some level of light stabilization. These applications generally use first generation HALS systems. Though these early HALS typically suffers from poor compatibility with polyolefins, their low cost ensures continued use. Now there is a cost-effective alternative that provides improved performance without the shortcomings of first generation HALS. In natural and pigmented polyolefins improvements in both aesthetic and physical property retention can be achieved. This is largely due to the increased compatibility of this HALS with non-polar substrates.