CONCLUSIONS 



1 . The organotin resins showed more resistance to fungal growth than 

 the unreacted resins. 



2. Resistance to fungal growth generally increased with increasing tin 

 content of the resin. 



3. Of the three organisms tested, A. putlulans grew the most abundantly 

 and A. ovyzae the least abundantly. 



4. When TBTO was simply added to a resin at a concentration generally 

 used in a paint, the resistance to fungal growth was lost more readily 

 by leaching than when the TBTO was reacted with the resin. 



FUTURE WORK 



Paints have been prepared from alkyd organotin resins in 5-gallon 

 batches. Wooden specimens painted with them are currently undergoing 

 tropical exposure to determine how they perform in the field. 



REFERENCES 



1. B. G. Brand and H. T. Kemp. "Mildew defacement of organic coatings," 

 Paint Research Institute, Federation of Societies for Paint Technology, 

 Philadelphia, PA, Aug 1973. 



2. M. Goll. ''Microorganisms and test procedures in the assay of 

 preservatives and mildew inhibitors," Official Digest, vol 30, Aug 1958, 

 pp 364-367. 



3. M. Hess. "Paint film defects," Second Edition, Reinhold Publishing 

 Corp., New York, NY, 1965, pp 18-21. 



4. D. 0. Hill and G. C. April. "Major factors influencing fungal 

 growth: A survey and plan of investigation," J. Paint Technology, vol 

 44, no. 571, Aug 1972, pp 43-50. 



5. Naval Ship Research and Development Center. Report 3581 : Non- 

 polluting antifouling organometallic polymers, by E. J. Dyckman et al. , 

 Annapolis, MD, Nov 1972. 



Report 4159: Antifouling organometallic structural plastics, 



by J. A. Montemarano and E. J. Dyckman. Annapolis, MD, Aug 1973. 



11 



