Antifouling coating composition comprising a fluorinated resin

US6899955B2 · kind B2 · utility

Assignees

• International Coatings Limited · GB
• Ausimont S.p.A. · IT

Inventors

• Robert Lines · Ponteland, GB
• David Neil Williams · Newcastle upon Tyne, GB
• Stefano Turri · Milano, IT

Key dates

• Filing date: Jun 1, 2001
• Grant date: May 31, 2005
• Expiry date: Jun 1, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31663
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

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—O—Rf—CFY-L-W wherein: W is a group of the general formula —Si(R1)α(OR2)3-α, wherein α=0, 1, or 2, preferably α=0, R1 and R2 independently have the meaning of linear of branched C1-C6 alkyl groups, optionally containing one or more ether groups, or C7-C12 aryl or alkyl groups, and preferably R1 and R2 are C1-C4 alkyl groups; L is an organic linking group; Y is F or CF3; and Rf is 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: —CFXO—, CF2CF2O—, CF2CF2CF2O—, CF2CF2CF2CF2O—, CR4R5CF2CF2O—, —(CF(CF3)CF2O)—, —CF2CF(CF3)O—, wherein X is F or CF3, R4 and R5 independently have the meaning of H, Cl, or C1-C4 perfluoroalkyl.