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Composites Innovation 2018

Dilutec Gelcoat Meets Shipyard Requirements

08 August 2017

Dilutec reports that its Colorgel Marine gelcoat meets the requirements of both shipyards and ship owners.

The Brazilian company reports that shipyard seek the highest possible repeatability, to ensure the industrialisation of the process and waste reduction. Ship owners seek a combination of mechanical and chemical resistance and good aesthetics. 

“The resin used in the production of Colorgel Marine has high compatibility with styrene, which implies a lower presence of this volatile organic compound in the formulation,” explains Marcos Brambilla, Technical Manager of Dilutec. “Therefore, its total emission level is 6.7%, compared to 13.6% of traditional gelcoats.”

Thus, the shipyard achieves an efficiency rate in the transfer to the mould of more than 90%, which drops to less than 80% when compared to a regular gelcoat, the company reports.

“Colorgel Marine also draws attention because of its excellent fluidity and high thixotropic content, which prevents run-off during application on vertical surfaces,” Brambilla adds.

For the ship owner, according to Brambilla the most important factor is the resistance to yellowing achieved in the accelerated weathering test (QUV).

“After 1000 hours, Colorgel Marine indicates a yellowing rate about 50% lower compared to the conventional product, while its gloss retention index is 75%, compared to 60% of regular gelcoats,” he says.

The pigments used in the gelcoat are free of heavy metals and ensure high resistance to UV rays and weathering. 

While maintaining a factory in Angra dos Reis (Rio de Janeiro), Brazil, French shipyard Benetau relied on the work of Tiago Mance, then head of lamination. Ready to return to France, where he will continue to work for the company, Mance says that his experience with Colorgel Marine was positive.

“We had very specific parameters in terms of viscosity and flow, as well as in relation to the product’s behaviour during the application with the gelcoat machine, and all of them were fully met by Dilutec’s gelcoat,” he says.

With the success of the initial application, Benetau requested further developments, such as new gelcoat colours and formulations for touch-ups. The results were also satisfactory, Mance says.






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