Alkyd paint curing principle

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Chain polymerization to form a film - oxidative polymerization

The auto-oxidation of the double bond of the unsaturated fatty acid induces polymerization to form a network macromolecular structure and solidify into a film. The rate of oxidative polymerization is related to the number of functional groups (double bond groups), the position, and the oxygen transfer rate (using metals such as cobalt, manganese, and lead to promote oxygen transfer and increase the curing speed). Coatings using similar curing methods include: natural resin coatings containing oil and fat components, phenolic resin coatings, and epoxy resin coatings.

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