Authors : SYNTHESIS OF GREEN POLYMERIC MATERIAL AND ITS APPLICATION IN DEVLOPMENT OF ECOFRIENDLY ANTIFOULING COATINGS.
Page Nos : 192-201
Description :
The maintenance of ship bottom by using antifouling coatings is of great
economic importance. Organisms settling and growing upon the hull destroy its
smooth, streamlined contour which marine architects have designed with
imagination and skill. After having dry dock, a ships underwater surface
progressively become rough, which is responsible for friction, with the result that
fuel consumption increases to maintain a given speed.
Accordingly, new antifouling paints featuring organometallic polymer (OMP)
toxicants have been developed at a U.S. Government laboratory in response to these
requirements. Tributyltin (TBT) is the active chemical reagent present in
conventional antifouling paints which prevent the growth of fouling organism. Later
it was found that TBT containing paints have toxic effect on human beings, wildlife
and aquatic life. Due to these toxic effects the use of TBT is now restricted.
In this research paper the toxicity of TBT has been studied and alternative
eco-friendly substitutes for TBT are proposed. Several naturally occurring biocompounds
such as cashew nut shell liquid (CNSL), rosin based alkyd resin and
lemon grass oils have an excellent antifouling activities.We have prepared two types
of resin,alkyd and CNSL, several formulation of antifouling paints based on above
resin has been prepared. We have also compared these formulations with
commercial tin acrylate paint. Prepared formulations are free from tin and also
exhibit excellent physicochemical and anti microbial property.