Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
1998-09-03
2001-04-03
Wu, David W. (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C523S122000, C525S328900, C525S330200, C525S330600, C525S372000, C525S373000
Reexamination Certificate
active
06211301
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a method for the production of an antifouling resin and an antifouling coating composition, and more particularly to a method for the production of an antifouling resin. Resins of the present invention are generally suitable for use as binders for antifouling coating materials that are capable of forming a coating film to be used particularly on vessels and marine structures for the prevention of biotic pollution.
2. Description of Related Art
As the binder for an antifouling coating material, resins containing a carboxylate of tin have been widely used heretofore. On account of the toxicity, a switch from this resin to other resin systems has been being strongly urged. In recent years, studies are chiefly directed to resins which contain carboxylates of copper and zinc.
No measure has yet been perfected for controlling the speed of wear of coating films obtained by these resins. Though these resins indeed manifest a fair ability to prevent fouling, they have problems with incurring difficulty in retaining their effects. Further, in the case of a resin which has a metal carboxylate structure in the molecular unit, the method which obtains the resin by simply polymerizing a monomer possessing the metal carboxylate structure entails the problem of incurring difficulty in synthesizing the resin because the polymerization entails the phenomenon of gelation.
SUMMARY OF THE INVENTION
An object to be attained by the present invention resides in developing a resin which allows control of the speed of wear and enables the antifouling property to be manifested for a long time, generally at least one year. It was a further object to develop a method for stable production of the resin. The present inventors have continued a diligent study with a view to attaining these and other objects and have discovered consequently a specific resin which is very easily produced on a commercial scale is highly effective in retaining the antifouling property. This invention has been perfected as a result.
In accordance with these and other objects, there is provided a method for the production of an antifouling resin comprising: reacting a base resin (A) simultaneously containing a carboxyl group and a group having a polyalkylene glycol structure represented by formula (I)
&Parenopenst;CmH2mO&Parenclosest;n R
1
(I)
wherein R
1
is a hydrogen atom or a straight chain, branched, or cyclic alkyl group or an aralkyl group, m is 1, 2, 3, or 4, and n is an integer of not less than 1 and not more than 100 in the molecular unit,
with (ii) the oxide or hydroxide of a metallic atom having a valence of not less than 2 in the presence of water present in an amount of 1-30 wt. %, based on the weight of said base resin (A).
The present invention further provides antifouling coating compositions per se as well as antifoaling coating compositions prepared according to the present method.
Other objects, feature and advantages of the present invention will become apparent from the following detailed description. It should be understood, however, that the detailed description and the specific examples, while indicating preferred embodiments of the invention, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.
REFERENCES:
patent: 3979354 (1976-09-01), Dyckman et al.
patent: 4082709 (1978-04-01), Dyckman et al.
patent: 4465795 (1984-08-01), Sunano et al.
patent: 4499223 (1985-02-01), Yamamori et al.
patent: 4594365 (1986-06-01), Russell et al.
patent: 1036749 (1978-08-01), None
patent: 24 58 064 (1975-08-01), None
patent: 0 133 779 (1985-03-01), None
patent: 0 181 037 (1986-05-01), None
patent: 0 698 643 (1996-02-01), None
patent: 0 779 304 (1997-06-01), None
patent: 0 779 304 A1 (1997-06-01), None
patent: 2 167 075 (1986-05-01), None
patent: 96 07677 (1996-03-01), None
Numa Nobushige
Ogino Shinichi
Egwim K C
Kansai Paint Co. Ltd
Rader Fishman & Grauer
Wu David W.
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