Accelerated weatthering of wood coatings. Development of a new test cycle
article
A new relatively wet test cycle for accelerated weathering of wood coatings is developed. The wet periad is chosen in such a way that the maximum moisture content of test panels approaches the moisture content of test panels during outdoor exposure in the Netherlands. A long wet period du ring the test is essential for leaching of low molecular components from water borne paint systems. For twelve commercially available paint systems the results of the new accelerated test cycle are compared with results of outdoor exposure. This comparison is based on changes in water uptake of painted woeden test panels and on changes in visco-elastic behaviour of the paint films. The test results show clearly that the water barrier function and the visco-elastic behaviour of the paint systems can change considerably du ring weathering. The important rele
of leaching during the test is confirmed. The newly develop test cycle correlates well with outdoor exposure at Delft. the Netherlands.
of leaching during the test is confirmed. The newly develop test cycle correlates well with outdoor exposure at Delft. the Netherlands.
Topics
TNO Identifier
985167
Source
Bron onbekend, pp. 1-5.
Pages
1-5
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