Baxenden at Eurocoat

Citation

(1998), "Baxenden at Eurocoat", Pigment & Resin Technology, Vol. 27 No. 6. https://doi.org/10.1108/prt.1998.12927fad.006

Baxenden at Eurocoat

Baxenden at Eurocoat

Keywords Baxenden, Coatings, Unblocking

Baxenden Chemicals Ltd exhibited alongside its Spanish agent, Warwick Benbassat, at the Eurocoat Exhibition.

The company promoted its blocked urethane technology. Included in the range are non-yellowing, water-based blocked isocyanates, which can be used in coil coatings, stoving enamels and automotive paints.

Baxenden's patented low temperature unblocking system reportedly results in a reduction in throughput times in curing ovens, in energy usage during curing and in the release of organic volatiles.

Substrates can include temperature sensitive materials since the blocking agents unblock at temperatures as low as 90°C, compared to over 150°C with conventional technology.

Trixone SC7906, a recent addition to Baxenden's range, is a urethane bisoxazolidine for use in the coatings, sealants and elastomer markets. The product can be used in one pack moisture activated light stable polyurethanes. On exposure to water or atmospheric moisture Trixone SC7906 hydrolyses, offering four possible reaction sites. This allows the formulation of high build, void-free coatings, sealants and elastomers.

Baxenden also produces high solids, solvent-based polyurethane resins for use in heat resistant flexographic and laminating inks in the packaging industry. Used as modifying resins for nitrocellulose (NC) Trixene PR 4127 and 4129 enhance adhesion to various substrates used in the flexible packaging industry. These include cellophane, oriented polypropylene (OPP), co-extruded OPP and metallised films, whose smooth and non-porous surfaces normally exclude the use of unmodified NC-based inks.

Trixene DP 9B/1402 is a suffactant stabilised catalyst dispersion in water. It was developed to improve the cure time in the cross-linking reaction of the blocked isocyanate emulsion, Trixene BI 7986, with hydroxy functional polymers such as Xenacryl DP9B/1267.

The water-based catalyst reportedly improves the cure profile to more commercially attractive speeds. Experiments at levels as low as 0.2 per cent on the total system (polymer and isocyanate) have dramatically cut the time required to achieve full cure at 125°C from 45 minutes to ten minutes.

The company also produces a range of aromatic and aliphatic isocyanate-based prepolymers, which are used widely in the coatings industry. The series contains both solvent and solvent-free systems, which can be formulated into one pack moisture cure, moisture activated and two pack systems. The range, which has been designed to give maximum latitude to the polyurethane formulator, also includes aromatic and aliphatic ink flexibilisers.

For further information contact Speciality Chemicals Division, Baxenden Chemicals Ltd. Tel: +44 (0) 1254 872278; Fax: +44 (0) 1254 871247.