Feature 4 | PAINTS AND COATINGS


Anti-fouling range upgraded by International Paint


UK-based International Paint has recently improved and expanded its range of antifouling coatings.


T


he enhanced line up, which includes higher volume solids products formulated to allow


a reduction in the number of coats per project,


lower levels of overspray and


reduced volatile organic compounds (VOC)


emissions, features what is


claimed to be International Paint’s highest-performing self polishing copolymer antifouling, Intersmooth SPC; an economical option called Interspeed; and a blend of both technologies with the company’s new Interswiſt products. Intersmooth


7460HS SPC and


Intersmooth 7465HS SPC are hydrolysing self-polishing copolymer antifoulings. Teir patented copper acrylate technology delivers controlled chemical dissolution of the paint film, in a way that is intended to ensure continued smoothing over long drydocking intervals. Tese two coatings are intended to provide fouling control for up to 60 months on deepsea vessels, while two variants, Intersmooth 360 SPC and Intersmooth 365 SPC, are specially designed for coastal vessels. Two more new coatings, Interspeed 6400


and Interspeed 6200, have been developed from proven controlled depletion polymer (CDP) based technology, which has been successfully applied to over 11,000 vessels to date. Tese products provide a more economical choice for protecting vessels for up to 36 months in service. Interswiſt 6800HS, similarly developed


from proven self polishing coatings technology, is a high volume solids, low VOC blend of copper acrylate SPC technology and rosin-based CDP technology. Providing up to 60 months fouling control in service, performance is said to lie somewhere between that of the high performance self polishing copolymer antifoulings and the more economical CDP antifoulings. “The careful combination of in


technologies Interswift 6800HS


produces an antifouling which has the 36


NSCSA’s VLCC Ramlah. Test results have shown the benefits of coating her hull with Intersleek.


CDP benefits of surface tolerance, high volume solids and an attractive cost base, together with the patented copper acrylate SPC attributes of polishing rate control, reduced leached layer size and control of biocide release,” comments Mike Hindmarsh, business development manager for biocidal antifoulings. Also now available from International Paint is Interswiſt 455FB, a product designed for the unique fouling challenge experienced on flat bottom areas. As well as combining technologies


in this single product, a new ‘Advanced Duplex System’ has been developed by the company. Tis utilises both Intersmooth and Interswiſt products in way that offers a high performance, cost effective fouling control option. More recently, continued research and


development, particularly in the area of adhesion mechanics, has resulted in the Intersleek 7180 Linkcoat, which has been introduced to allow customers to access the fluoropolymer-based Intersleek 900 and silicone-based Intersleek 700 foul release technology, without the need and expense of full underwater hull blast


cleaning. Specially designed for direct application over existing traditional antifouling technologies, controlled depletion polymers and hybrid schemes, in addition to SPC antifoulings,


the


application of Intersleek 7180 Linkcoat, followed by the full Intersleek scheme, can reduce the surface roughness of an existing antifouling system by over 70%, resulting in a smoother hull, International Paint claims. According to Jim Brown, marketing


development manager: “Economically, Intersleek 7180 Linkcoat provides a logical choice for ship operators looking to reduce costs. Compared to a full blast and full scheme application on a typical VLCC vertical sides application, the savings could be over US$ 450,000, through shorter times in time in drydock and reduced surface preparation and application costs.” Te benefits of Intersleek were recently


demonstrated through the experience of eight VLCCs owned by the National Shipping Company of Saudi Arabia (NSCSA) which were coated with Intersleek 700. NSCSA took the decision


Shiprepair and Conversion Technology 1st Quarter 2011


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