Patent ID: 7345097

Claim:
An autoxidisable architectural coating composition which composition includes an autoxidisable binder polymer and a promoter system for promoting autoxidation of the autoxidisable binder polymer wherein the system comprises: a) metal ions which promote surface autoxidation present in an amount up to 0.04 wt % based on the weight of autoxidisable binder polymer in the coating composition; b) at least one photoinitiator activateable by natural daylight present in amounts of from 0.3 to 2.0 wt % based on the weight of the autoxidisable binder polymer in the composition for the system to promote surface autooxidation of the autoxidisable binder polymer at ambient temperatures; and c) sufficient through promoter for the through promoter to provide to the coating composition from 0.03 to 02 wt % of metal ions from the through promoter based on the weight of the binder polymer in the composition, wherein the composition comprises no cobalt ions.