Anti-fouling compositions with a fluorinated alkyl- or...

C - Chemistry – Metallurgy – 09 – D

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C09D 5/16 (2006.01) C09D 183/04 (2006.01) C09D 183/10 (2006.01)

Patent

CA 2441585

The invention pertains to 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: -{[CFR-(CFR)m-(O)n]p-[CFR-O]q]}- wherein n is 0 or 1, m is an integer from 0 to 4, R independently is H, F, CI, Br, or CF3, 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 -[SiR1R2-O]-, wherein R1 and R2 are independently selected from hydrogen, alkyl, aryl, aralkyl, and a vinyl group.

L'invention concerne une composition antisalissure renfermant un polymère durci ou réticulé exempt de fragments de perfluoropolyéther, ainsi qu'un polymère ou un oligomère fluoré contenant un alkyle ou un alcoxy. De préférence, ce polymère fluoré contenant un alkyle ou un alcoxy renferme une unité récurrente de formule générale {[CFR-(CFR)¿m?-(O)¿n?]¿p?-[CFR-O]¿q?}-, dans laquelle n vaut 0 ou 1, m est un nombre entier de 0 à 4, R est indépendamment H, F, Cl, Br ou CF¿3?, et le rapport q/p est compris entre 0 et 10. Le polymère exempt de fluor est un polymère contenant un organosiloxane et renfermant une unité récurrente de structure générale [SiR¿1?R¿2?-O]-, dans laquelle R¿1? et R¿2? sont indépendamment choisis parmi hydrogène, alkyle, aryle, aralkyle et un groupe vinyle.

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