| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.18 ( May 1988 ) ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Development of New Coloured Polyurethane Elastomer-Coated Heavy-Duty Steel Fuminori Mukaihara, Tsukasa Imazu, Takao Kurisu, Noboru Nishiyama |
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Synopsis : New coloured polyurethane elastomer coated steel structures with top coating of acrylic urethane have been developed for marine and harbor environments. Polyurethane elastomer coatings contain a little aliphatic isocyanates, which have colour-change resistance, together with aromatic isocyanates and chelate agents, which restrain the advent of diquinone imide structures formed by a photo-catalysed autoxidation process. Acrylic urethane as a top coating consists of aliphatic isocyanates and aliphatic acrylic polyols and colour pigments. Surface treatment and the polyurethane elastomer coating layer have good adhesion, good mechanical properties and anticorrosion properties. The top layer of acrylic urethane has good weathering properties. This new coloured polyurethane elastomer coated steel can be used for marine and harbor structures to meet both an added safety for ship sailing and environmental colour harmony. |
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