Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1997-01-30
2000-08-29
Reddick, Judy M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
4273855, 427387, 523177, 524 99, 524413, 524423, 524434, 524449, 524450, 524464, 524472, 524521, 524547, C08K 300, C08K 500
Patent
active
061109908
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an antifouling coating composition, a coating film formed from this antifouling coating composition, an antifouling method using the antifouling coating composition and a hull or an underwater structure coated with the above coating film.
More particularly, the present invention is concerned with an antifouling coating composition which enables providing a coating film being excellent in cracking resistance and having self-polishing properties such that the adherence of aquatic organism to ship bottoms, underwater structures, fishing nets, etc. can effectively prevented and is further concerned with a coating film formed from this antifouling coating composition, an antifouling method using the antifouling coating composition and a hull or an underwater structure coated with the above coating film.
Moreover, the present invention is concerned with an antifouling coating composition capable of forming a coating film with excellent strength, especially, a coating film being excellent in cracking and peeling resistances in an environment in which dry and wet conditions alternate with each other (zone under alternate dry and wet), for example, being excellent in cracking and peeling resistances at water lines of ships or in the vicinity of underwater structure drafts where immersion in the seawater and exposure to the air alternate with each other (zone under alternate dry and wet), and is further concerned with a coating film formed from this antifouling coating composition, an antifouling method using the antifouling coating composition and a hull or an underwater structure coated with the above coating film.
BACKGROUND ART
Ship bottoms, underwater structures, fishing nets and the like are likely to have their appearance and function damaged by the adhesion to surface and propagation of various aquatic organisms including animals such as shellfishes and barnacles, seaweeds such as laver and bacteria caused when they are exposed to the water for a prolonged period of time.
In particular, when the above aquatic organism adheres to a ship's bottom and propagates, the danger is highly probable that the roughness of the entire surface of the ship is increased to thereby lower the speed of the ship and increase the fuel consumed by the ship. Removing the aquatic organism from the ship bottom necessitates spending of much labor and working time at a dock. Further, when bacteria adhere to, for example, an underwater structure and propagates to thereby cause adhesion of slime (sludgy matter), there is the danger that the slime putrefies to thereby cause damages such as deterioration of the properties of the underwater structure and thus marked shortening of the life thereof.
For example, a composition comprising a copolymer of tributyltin methacrylate and methyl methacrylate and cuprous oxide (Cu.sub.2 O) has been used as an antifouling paint effectively applicable to ship bottoms for enabling the prevention of the above damages. This copolymer of the antifouling paint is hydrolyzed in the seawater to thereby liberate organotin compounds such as bistributyltin oxide (tributyltin ether of the formula Bu.sub.3 Sn--O--SnBu.sub.3 wherein Bu is a butyl group) and tributyltin halides (Bu.sub.3 SnX wherein X is a halogen atom), so that antifouling effect is exerted. Moreover, the copolymer hydrolyzate per se is a hydrolyzable self-polishing paint which is water-soluble and thus is dissolved in the seawater, so that no resin residue is left on the surface of the ship bottom coating to thereby enable continually maintaining active surface.
However, the above organotin compounds are so highly toxic that apprehensions are being entertained with respect to marine pollution, occurrence of anomalous fish and adverse effects on ecosystem through food chain. Therefore, the development of an antifouling paint not containing tin is desired as a substitute therefor.
For example, antifouling paints based on silyl esters as described in Japanese Patent Laid-open Publication Nos. 4(1992
REFERENCES:
patent: Re30909 (1982-04-01), Law et al.
patent: 3639653 (1972-02-01), Clark et al.
patent: 3896753 (1975-07-01), Shepherd et al.
patent: 4021392 (1977-05-01), Milne et al.
patent: 4129610 (1978-12-01), Kobayashi et al.
patent: 4143015 (1979-03-01), Soeterik
patent: 4385134 (1983-05-01), Foscante et al.
patent: 4593055 (1986-06-01), Gitlitz et al.
patent: 4594365 (1986-06-01), Russell et al.
patent: 4650826 (1987-03-01), Waniczek et al.
patent: 4670481 (1987-06-01), Foscante et al.
patent: 4752629 (1988-06-01), Proudlock et al.
patent: 4774080 (1988-09-01), Yamamori et al.
patent: 4898895 (1990-02-01), Masuoka et al.
patent: 4957989 (1990-09-01), Saitoh
patent: 5080892 (1992-01-01), Yamamori et al.
patent: 5236493 (1993-08-01), Hunter et al.
patent: 5266105 (1993-11-01), Tsuneta et al.
patent: 5374665 (1994-12-01), Isaka et al.
patent: 5436284 (1995-07-01), Honda et al.
patent: 5439957 (1995-08-01), Takimoto et al.
patent: 5514731 (1996-05-01), Nakai
Masao Kodama and two others "Paint and Coating" Jul. 30, 1973.
Sakura Yamada "Plastic Compounding Agent-Basis and Application" Jul. 10, 1971.
Akira Okina and three others "Paints Pigments" Aug. 30, 1960, The Nikkan Kogyo Shimbun, Ltd.
Derwent Japanese Patent Abstract JP-A-62 57464.
Patent Abstract of Japan JP-A-63 215780, published Sep. 8, 1988.
Derwent Japanese Patent Abstract JP-A-7 102193.
Derwent Japanese Patent Abstract JP-A-6 157941.
Derwent Japanese Patent Abstract JP-A-7 18216.
Derwent Japance Patent Abstract JP-A-6 157940.
Derwent Japanese Patent Abstract JP-A-6 25560.
Derwent Japanese Patent Abstract JP-A-4 264168.
Derwent Japanese Patent Abstract JP-A-4 264169.
Derwent Japanese Patent Abstract JP-A-4 264170.
Derwent Japanese Patent Abstract JP-A-60 500452.
Scheer, Properties and Uses of Chlorinated Paraffins, Chem. Ind., vol. 54, pp. 203-205, Feb. 1944.
Hikiji Yasuto
Kiseki Yasuyuki
Nakamura Naoya
Tsuboi Makoto
Chugoku Marine Paints Ltd
Reddick Judy M.
LandOfFree
Antifouling coating composition, coating film formed from said a does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Antifouling coating composition, coating film formed from said a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Antifouling coating composition, coating film formed from said a will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1250643