Antioxidants, Inhibitors, or Heat Stabilisers

2 -Thiodiethylbis-[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] effectively stabilises HDPE and LDPE, having good compatibility and not affecting their colour. It is particularly suitable for use in carbon black loaded PE formulations such as LDPE wire and cable insulation and chemically crosslinked PE. 

Eor LDPE and LLDPE, the current standard systems used are binary blends of high molecular weight di-tert-butyl phenols (AO-l/AO-2) and phosphates (P-l/P-2). New high-performance ternary blends involving lactones (L-1) together with traditional phenols and phosphates are utilised more and more for demanding applications. 

For extremely colour-critical applications such as fibres, phenol-free stabilisation systems are provided by a combination of hindered amines (HAS-1 or HAS-2) used either with hydroxylamine (NOH) or with a mixture of lactone (L-1) and phosphite (P-1). Addition of phosphite improves 

Minerals such as talc, calcined clay, and silica are infrared absorbers. EVA copolymer film is highly transparent to UV radiation and has a natural infrared absorption at a wavelength of around 1 p.m. It can thus be used to retain the heat developed within greenhouses. 

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