Antifouling coating
AssigneeKansai Paint Co., Ltd.
InventorsKiyoshi Nanishi, Hiroyuki Nakayama
Life of this patent
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Abstract
Disclosed is an antifouling coating which contains a phosphorus nitride compound and/or a halogenated phosphorus nitride compound and a coating resin as the major components, and which is non-toxic and has excellent long-term antifouling properties when coated on underwater substrates, for example, underwater structures such as ships, fishing nets, and the like.
Claims19
An antifouling underwater substrate comprising an underwater substrate having coated thereon a coating containing, as the major component, (i) a phosphorus nitride compound represented by the general formula (1):
- ##STR9## wherein R.sub.1 and R.sub.2 are --OR.sub.3, ##STR10## or --NH--(CH.sub.2)n.sub.2 --COOR.sub.3 and are the same or different, R.sub.3 is C.sub.m H.sub.2m +1 or an aromatic group, .sub.1 is an integer of 3 or more, n.sub.2 is an integer of 1 to 5, and m is an integer of 1 to 20, and/or (ii) a halogenated phosphorus nitride compound represented by the general formula (II):
- ##STR11## wherein n.sub.1 is an integer of 3 or more, at least a part of R.sub.1 and of R.sub.2 is a halogen atom and the remaining parts of R.sub.1 and of R.sub.2 are --OR.sub.3, ##STR12## or --NH--(CH.sub.2)n.sub.2 --COOR.sub.3 and are the same or different respectively, R.sub.3 is C.sub.m H.sub.2m +1, n.sub.2 is an integer of 1 to 5, and m is an integer of 1 to 20, and (iii) a coating resin selected from a water-soluble resin and a water-insoluble resin, with the phosphorus nitride compound (i) and/or the halogenated phosphorus nitride compound (ii) being leached into the water to thereby prevent fouling.
An antifouling underwater substrate as claimed in claim 11, wherein the halogen atom is contained in an amount of 1% by weight or more in the halogenated phosphorus nitride compound.
Dependencies are inferred from the claim text.