Monomer technology for can coatings

A BPA-NI lacquer has been developed by US-based chemicals, fibres and plastics company Eastman that is claimed to improve the flexibility and durability of can coatings.

Eastman’s Tetrashield, which is based on a monomer technology found in the company’s Tritan copolyester developed for food contact applications, helps coatings manufacturers and canmakers to produce higher-performing coatings, the company claims. It does not use bisphenol A (BPA) or monomers such as styrene.

Tetrashield complies with the requirements of both the US Food and Drug Administration and the European Union for food contact materials.

The resins combine a set of performance properties that enhance efficiencies in the formulation and canmaking processes, says Eastman. These range from high-solids formulation options and excellent flexibility to exceptional corrosion and sterilisation resistance. They are also claimed to offer greater hydrolytic stability and corrosion resistance than current BPA-NI options – even against hard-to-hold foods.

By enabling flexibility and durability at lower viscosity and higher solids, Tetrashield can enable production efficiencies such as more efficient film build and faster film drying while maintaining excellent application parameters, says Eastman.

More information from Eastman Corporate, PO Box 431, Kingsport, Tennessee 37662-5280, USA. Tel: 1 423 229 2000. Website: