C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/38 (2006.01) C07C 69/63 (2006.01) C08G 18/61 (2006.01) C08J 5/18 (2006.01) C09D 175/04 (2006.01)
Patent
CA 2311457
Coatings are provided with very low surface energies provided by fluorine and/or silicone moieties. Aqueous dispersions of externally chain extended polyurethane compositions terminated by hydrolyzable and/or hydrolyzed silyl groups and containing dispersing or emulsifying groups, particularly carboxyl groups are provided. Also polyurethane dispersions which are substantially organic solvent free which cure to water and solvent resistant, tough, scratch resistant, preferably light stable polyurethane films are provided. Such films are useful as anti-fouling marine coatings. The compound R f R'f CFCOOCH2C(R)(CH2OH)2 is provided.
L'invention porte sur des revêtements présentant de très faibles tensions de surface grâce à des fractions de fluor et/ou de silicone. L'invention porte également sur des dispersions aqueuses de compositions de polyuréthane allongées par une chaîne externe et terminées par des groupes silyle hydrolysables et/ou hydrolysés et contenant des groupes dispersants ou émulsifiants, notamment des groupes carboxyle. L'invention porte également sur des dispersions de polyuréthane qui sont pratiquement exemptes de solvant organique et qui durcissent à l'eau, et des films de préférence stables à la lumière, résistant aux rayures, durs et résistant aux solvants. Ces films sont utilisés comme revêtements maritimes antisalissures. Le composé de l'invention est RfR'fCFCOOCH2C(R)(CH2OH)2.
Guerra Miguel A.
Hansen Richard G.
Holland Lowell W.
Moore George G. I.
Roberts Gary P.
Minnesota Mining And Manufacturing Company
Smart & Biggar
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