Akzo Nobel N.v.

Akzo Nobel Coatings International B.v.

Adrian James Lee

David Neil Williams

David Anthony Stark

Cait Marie Davies

Nigel Ivor Edward Shewring

Nigel Ivor Shewring

An anti-fouling composition which comprises a cured or cross-linked polymer free of perfluoropolyether moieties and a fluid fluorinated alkyl- or alkoxy-containing polymer or oligomer. Preferably, the fluorinated alkyl- or alkoxy-containing polymer or oligomer comprises a repeating unit of the general formula:&#x2014;{[CFR&#x2014;(CFR)&#x2014;(O)]&#x2014;[CFR&#x2014;O]}&#x2014;wherein n is 0 or 1, m is an integer from 0 to 4, R independently is H, F, Cl, Br, or CF, and the ratio q/p is 0-10, and the fluorine-free polymer is an organosiloxane-containing polymer comprising a repeating unit of the general structure &#x2014;[SiRR&#x2014;O]&#x2014;, wherein Rand Rare independently hydrogen, alkyl, aryl, aralkyl, or a vinyl group.

Anti-fouling compositions with a fluorinated alkyl- or alkoxy- containing polymer or oligomer

A process to physically deter fouling from a substrate in an aquatic fouling environment, which process comprises forming on the substrate, before exposure to the said environment, a coating composition comprising (i) a curable polyorganosiloxane polyoxyalkylene block copolymer having at least two reactive groups X situated on the copolymer chain and (ii) an organosilicon crosslinking agent and/or a catalyst.

Antifouling coating composition based on curable polyorganosiloxane polyoxyalkylene copolymers

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Newcastle upon Tyne, United Kingdom

Adrian James Lee