Abstract
A review of the common photodegradation processes in polymeric coatings is presented, and the photoactivity of titanium dioxide and its consequences are discussed. Experimental work which explores the durability implications of the use of titanium dioxide in coatings is presented. This includes the effects of pigment flocculation, film thickness and photostability of the pigment. The importance of the correct selection of light source for accelerated weathering is stressed. Finally, results are presented from a recent study of the influence of geographical location on the weathering of titanium dioxide pigmented paint films.
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