Anti-fouling paint composition
AssigneeChugoku Marine Paints, Ltd.
InventorsSumio Matsuda, Hajime Kudara
Life of this patent
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Abstract
Provided is an anti-fouling paint composition for preventing for an extended period of time fouling of submersed or submerged objects or marine structures. The paint composition comprises as an anti-fouling agent a copolymer comprised of (i) units of the formula: ##STR1## wherein R' is H or CH.sub.3 and R.sub.1, R.sub.2 and R.sub.3 are the same or different and selected from (Cl to 8) alkyl groups and a phenyl group, (ii) units of the formula: ##STR2## wherein R" is H or CH.sub.3, n is an integer of 2 to 4, R.sub.4 is Cl or (Cl to 4) alkyl group, R.sub.5 is Cl or Br and R.sub.6 is H, Cl or Br, and (iii) units of the formula: ##STR3## wherein R'" is H or CH.sub.3 and R.sub.7 is (Cl to 8) alkyl group.
Claims6
An anti-fouling paint composition which comprises 20% to 60% by weight of at least one pigment and 20% to 60% by weight of a copolymer having an average molecular weight of approximately 4,000 to approximately 30,000 and comprising:
- (i) 40% to 80% by weight, based on the weight of the copolymer, of units expressed by the formula:
- ##STR11## wherein R' is hydrogen or a methyl group and R.sub.1, R.sub.2 and R.sub.3 are the same or different and selected from alkyl groups having 1 to 8 carbon atoms and a phenyl group,
- (ii) 5% to 50% by weight, based on the weight of the copolymer, of units expressed by the formula:
- ##STR12## wherein R" is hydrogen or a methyl group, n is an integer of 2 to 4, R.sub.4 is chlorine or an alkyl group having 1 to 4 carbon atoms, R.sub.5 is chlorine or bromine and R.sub.6 is hydrogen, chlorine or bromine, and
- (iii) 5% to 30% by weight, based on the weight of the copolymer, of units expressed by the formula:
- ##STR13## wherein R'" is hydrogen or a methyl group and R.sub.7 is an alkyl group having 1 to 8 carbon atoms.
Dependencies are inferred from the claim text.