A great effort has been devoted to the research of self-healing coatings, as they provide anticorrosive protection even when the painting is damaged [1]. The encapsulation of drying oils is an established strategy to promote self-healing. Microcapsules release the seed oil upon mechanical damage, which triggers self-healing in the coating defect as the oil undergoes oxidative polymerization [2]. Alkyds are also a great candidate for microencapsulation due to their green nature, oxidative-driven polymerization, and better anticorrosive properties than seed oils [3]. However, the high viscosity of alkyds imposes great challenges for their encapsulation. In this work, a high solids alkyd from dehydrated castor oil (DCO) was developed with suitable viscosity for microencapsulation using seed oil-based reactive diluents.

Subject
Acids, Films, Self-healing, Coatings, Viscosity, Moduli, Storage, Silanes, Siloxanes, Hardness, Alkyds, Drying time, Oil
Keywords:
dehydrated castor oil, reactive diluents, alkyds, microencapsulation, self-healing
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2023
GOV
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