LEAD OCTOATE

Lead is a through drier & is always used as active or top drier. It promotes hard & through drying throughout the film & also increases flexibility, toughness & durability of the film. Lead drier can give rise to precipitation in the film as, Lead Octoate reacts with unreacted pthalic anhydride of alkyd resin, which could form Lead Pthalate, which may cause haziness & loss of gloss. In order to avoid this it is advisable to add Calcium Octoate first which acts as emulsifier & improves the pigment dispersing & wetting properties. In exterior paints & floor finishes Lead is used along with Manganese to produce tough & hard film. It is also used in Polyurethane finishes as auxiliary drier. 

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