Antifouling paint
AssigneeNippon Paint Co., Ltd.
InventorsJunji Yokoi, Akio Harada, Hiroharu Ohsugi
Life of this patent
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Abstract
An antifouling paint containing as an active component, in an amount of 5 to 100% by weight of the non-volatile of the paint, an alkylphenoxy group containing organo-silicon compound selected from an organo-silane, a bis-silyl compound and a polysiloxane, the alkyl being a straight or branched C.sub.7 to C.sub.12 alkyl of the formula: C.sub.x H.sub.2x+1 (in which x is 7 to 12) or a 1-methyl-1-phenylethyl group. The novel antifouling paint of the invention can afford a long-lasting, strong antifouling effect when used as a marine paint.
Claims5
An antifouling paint consisting essentially of an alkyl-phenoxy group containing an organo-silicon compound in an amount of 5 to 100% by weight of total solid content of the paint, and a solvent in an amount of 5 to 80% by weight of the paint, said alkyl-phenoxy group containing organo-silicon compound being one of the following members:
- (A) an alkylphenoxy bis-silyl compound of the formula:
- X.sup.1.sub.3 Si--(CH.sub.2)n--SiX.sup.1.sub.3
- wherein each of the X radicals is selected from the group consisting of a hydrogen atom, a hydroxy group, a lower alkyl group having 1 to 5 carbon atoms, a lower alkoxy group having 1 to 5 carbon atoms, a phenyl group, a phenoxy group, a vinyl group, an acetoxy group, a propenyloxy group, a methyl ethyl ketoxim group, and an alkyl-phenoxy group in which the alkyl substituent represents a straight or branched C.sub.7 -C.sub.12 alkyl or 1-methyl-1-phenylethyl, providing that at least one of the X.sup.1 radicals is the defined alkyl-phenoxy group, and n is an integer of 1 to 10;
- (B) an alkylphenoxy polysiloxane represented by the formula:
- ##STR18## having a number average molecular weight of less than 100,000, wherein each of the Y radicals is selected from the group consisting of C.sub.1 -C.sub.3 alkyl, vinyl and phenyl groups;
- each X.sup.2 in the formula is selected from the group consisting of a hydrogen atom, a halogen atom, a hydroxy group, an alkoxy group, an acyl group, an oxime group, an amido group, a propenoxy group, and an alkyl-phenoxy group in which the alkyl substituent represents a straight or branched C.sub.7 -C.sub.12 alkyl or 1-methyl-1-phenylethyl, providing that at least one of said X.sup.2 radicals is the defined alkyl-phenoxy group;
- m is 0 or an integer of 1 or more;
- and p is an integer of 1 or more;
- (C) an alkylphenoxy polysiloxane represented by the formula:
- ##STR19## having a number average molecular weight of less than 100,000, wherein each of the Y radicals is selected from the group consisting of C.sub.1 -C.sub.3 alkyl, vinyl and phenyl groups;
- each of the X.sup.2 radicals is selected from the group consisting of a hydrogen atom, a halogen atom, a hydroxy group, an alkoxy group, an acyl group, an oxime group, an amido group, a propenoxy group, and an alkyl-phenoxy group in which the alkyl substituent represents a straight or branched C.sub.7 -C.sub.12 alkyl or 1-methyl-1-phenylethyl, providing at least one of said X.sup.2 radicals is an alkyl-phenoxy group;
- and m is 0 or an integer of 1 or more;
- and
- (D) an alkylphenoxy polysiloxane represented by the formula:
- ##STR20## having a number average molecular weight of less than 100,000, wherein Z is an --R.sup.3 or an ##STR21## R.sup.1 is an alkylene or aralkylene having 2 to 20 carbon atoms which may include an ether, a thioether, an ester or a urethane bond;
- R.sup.2 is an alkyl having 1 to 6 carbon atoms, phenyl or cycloalkyl having up to 6 carbon atoms;
- R.sup.3 is an alkyl having 1 to 10 carbon atoms, aryl or aralkyl group;
- each of the X.sup.2 radicals is selected from the group consisting of a hydrogen atom, a halogen atom, a hydroxy group, an alkoxy group, an acyl group, an oxime group, an amido group, a propenoxy group, and an alkyl-phenoxy group in which the alkyl substituent represents a straight or branched C.sub.7 -C.sub.12 alkyl or 1-methyl-1-phenylethyl, providing at least one of said X.sup.2 radicals should be the defined alkyl-phenoxy group;
- m is 0 or an integer of 1 or more;
- p is an integer of 1 or more;
- and a is an integer of 1 to 3.
Dependencies are inferred from the claim text.