International Coatings Limited

Ausimont S.p.a.

Robert Lines

Stefano Turri

David Neil Williams

John Fox

A process for inhibiting the fouling of a substrate in a marine fouling environment, which comprises forming on the substrate, before exposure to the said environment, a coating comprising a curable fluorinated resin of the general formula: W-L-YFC&#x2014;O&#x2014;R&#x2014;CFY-L-W wherein: W is a group of the general formula &#x2014;Si(R)(OR), wherein &#x3b1;=0, 1, or 2, preferably &#x3b1;=0, Rand Rindependently have the meaning of linear of branched C-Calkyl groups, optionally containing one or more ether groups, or C-Caryl or alkyl groups, and preferably Rand Rare C1-C4 alkyl groups; L is an organic linking group; Y is F or CF; and Ris a group having an average molecular weight by number between 350 and 8000, preferably between 500 and 3000, and comprising repeating units having at least one of the following structures randomly distributed along the chain: &#x2014;CFXO&#x2014;, CFCFO&#x2014;, CFCFCFO&#x2014;, CFCFCFCFO&#x2014;, CRRCFCFO&#x2014;, &#x2014;(CF(CF)CFO)&#x2014;, &#x2014;CFCF(CF)O&#x2014;, wherein X is F or CF, Rand Rindependently have the meaning of H, Cl, or C1-C4 perfluoroalkyl.

Antifouling coating composition comprising a fluorinated resin

The invention relates to an antifouling paint having a binder comprising a rosin material and an auxiliary film-forming resin, the paint including an ingredient having marine biocide properties, wherein the binder comprises a blend of the rosin material and an auxiliary film-forming resin in ratio 20:80 to 95:5% by weight, the auxiliary film-forming resin comprising 20-100% by weight of an acid-functional film forming polymer (A) whose acid groups are blocked by groups capable of hydrolyzing, dissociating or exchanging with seawater species to leave a polymer soluble in seawater, the blocking groups being selected from quaternary ammonium groups which form a quaternary ammonium salt of the polymer and quaternary phosphonium groups which form a quaternary phosphonium salt of the polymer, and 80-20% of a non-hydrolyzing water-insoluble film-forming polymer (B).

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Northumberland, United Kingdom

Robert Lines