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- Studies on Some Preservative Properties of Chlorinated Coconut Oil
Studies on Some Preservative Properties of Chlorinated Coconut Oil
Thesis Abstract:
Chlorinated coconut oil was tested for such preservative characteristics as toxicity, permanence, penetrative capability, corrosiveness, appearance and paintability. All experiments were conducted in the laboratories of the Departments of Wood Science and Technology and Forest Biological Sciences, U.P. College of Forestry.
Results showed that on wood, the killing concentrations of chlorinated coconut oil were 0.08% for fungus Fomes sp., 0.14% for Poria vineta, 0.02, 0.07 and 0.10%, respectively.
In the permanence test, the chlorinated coconut was unfortunately leached out, hence the effective concentration threshold to stop fungal growth was 0.11% or retention of 0.273 lb/cu ft, as compared with 0.10% or retention of 0.0173 lb/cu ft under unweathered conditions.
The higher the pressure or the longer the time, the higher the absorption and the deeper the penetration of chlorinated coconut oil. A time-pressure combination of one hour and 200 psi was relatively economical for bagtikan treatment.
Weight losses of metals tested for corrosiveness of chlorinated coconut oil depended not only on concentrations but also on time. The oil was more corrosive on zinc than on aluminum and copper.
Freshly treated wood became yellowish and very odorous, but it received red and white paints rather well, except for discoloration on one-coating layer. The objectionable odor was greatly reduced after five months exposure to both indoor and outdoor conditions.
Because of its undesirable qualities, the study suggested limited use of chlorinated coconut oil and only in case of shortage of conventional wood preservatives.
