Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1990-01-16
1993-07-20
Page, Thurman K.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
424 7809, 424402, A61K 31745
Patent
active
052294366
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a novel undersea antifouling treating composition for treating a fibrous or rope-like material to be immersed in sea.
BACKGROUND ART
Fish nets for culturing, trapping and the like immersed in sea for a long time and materials such as rope and the like supporting these nets, a net for preventing invasion of jellyfishes at an intake port for cooling water, a curtain for the prevention of marine pollution used in seaside working and the like are immersed in sea over a long period of time.
As a result, they are fouled by sessile organisms in sea to cause problems such as clogging of mesh in the net, infection of various fishes with sickness or parasite due to the decrease of flowing quantity of sea water, damage by the increase of weight, decrease of floating force and the like.
As a method of preventing the fouling through such sessile organisms, there has hitherto been widely used an undersea antifouling treating composition containing an organic tin compound such as TBT (tributyl tin compound) or the like as an effective ingredient. However, the tendency of self-control in use or the like is widening from a doubt of storing the effective ingredient in circumstance or the like.
On the other hand, as an antifouling treating composition containing no organic tin compound, there are disclosed a) a technique using a dialkylpolysulfide compound as an effective ingredient in Japanese Patent Application Publication No. 62-43962, and b) a technique on an antifouling treating composition for fish nets containing tetraalkyl thiuram disulfide, dialkylpolysulfide, 2-(thiocyanomethylthio) benzothiazole and the like as an effective ingredient in Japanese Patent laid open No. 60-38306, respectively.
Apart from the above techniques, the inventors have proposed c) a technique on an undersea antifouling treating composition containing a copolymer indicating a particular hydrophilic property and thiocyano alkylthiobenzohetrozole in Japanese Patent laid open No. 1-178562.
However, the effective antifouling performances can not be obtained only by the dialkylpolysulfide compound disclosed as the above technique a, while the tetraalkyl thiuram disulfide, dialkylpolysulfide and 2-(thiocyanmethylthio) benzothiazole disclosed as the above technique b shortly show effective antifouling performances, but it is very difficult to elute a sufficient amount of the effective ingredient from the fish net treating agent over a long period of time. Further, it has been confirmed that only the copolymer indicating the particular hydrophilic property and the thiocycno alkylthiobenzohetrozole previously proposed by the inventors as the above technique c are still insufficient to maintain the effective antifouling performances over a long period of time.
An object of the invention is to provide an undersea antifouling treating composition which can necessarily and sufficiently control the eluting rate of an antifouling agent from the fibrous or rope-like materials immersed in sea over a long period of time.
DISCLOSURE OF THE INVENTION
The inventors have made various studies in order to achieve the above object and found that dialkylpolysulfide or dialkylpolysulfide and polybutene are added as an eluting controller to an undersea antifouling treating composition comprising a particular antifouling agent and a resin as well as various film forming substances, whereby the eluting rate of the above antifouling agent can necessarily and sufficiently be controlled over a long period of time, and as a result the invention has been accomplished.
That is, the invention is concerned with a first invention on an undersea antifouling treating composition comprising the following ingredients A-C;
A) at least one of the following components A1-A5;
B) film forming substance;
C) at least one of dialkylpolysulfides represented by the following general formula (1); of 1 to 20 and n is an integer of 1-5), and is preferably concerned with a second invention on an undersea antifouling treating composition comprising th
REFERENCES:
patent: 4111879 (1978-09-01), Mori et al.
patent: 4608433 (1986-08-01), Meyer et al.
Japan Abstract of 558/018304, Feb. 1983.
Japan Abstract 756/118006, Sep. 1981.
Japan Abstract 56/34604, Apr. 1981.
Database Japs, vol. 9, No. 166 (C-290); & JP-A-60 38 306 (Nippon Soda) Feb. 27, 1985.
Database WPIL, Accession No. 84-285352 [46], Derwent Publ. Ltd. London, GB; & JP-A-59 176 201 (Mitsui Toatsu) Oct. 5, 1984.
Honda Yoshihiro
Ishimoto Makoto
Kadota Osamu
Tsurumi Kouichiroh
Kulkosky P.
Nippon Oil and Fats Company Limited
Page Thurman K.
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