Abstract
Durability of wood translucent coating materials has been evaluated through an outdoor exposure test, an open-flame carbon-arc type accelerated weathering test, and a biological degradation test. These tests were conducted to clarify a durability level of wood translucent coating materials and to clarify which factor was predominant for outdoor deterioration between weathering deterioration and biological degradation. The results obtained can be summarized as follows: 1) It is considered that durability level of the translucent wood coating materials is not so high as emulsion paints and alkyd type of ready mixed paints. However, the translucent wood coating materials showed rather uniform deteriorated appearance compared with emulsion paints and alkyd type of ready mixed paints. It is considered that such uniform deterioration states are desirable for repair coating. 2) The results of the open-flame carbon-arc type accelerated weathering test are consistent with those of the outdoor exposure test. On the other hand, the results of the biological degradation test are not consistent with those of the outdoor exposure test. Therefore, it is considered that weathering deterioration is more predominant than biological degradation for outdoor deterioration of the wood translucent coating materials.
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