Full Idea
It is clear, of course, that if there are true essential predications, then they express necessary properties.
Gist of Idea
Clearly, essential predications express necessary properties
Source
Alan Sidelle (Necessity, Essence and Individuation [1989], Ch.2)
Book Reference
Sidelle,Alan: 'Necessity, Essence and Individuation' [Cornell 1989], p.26
A Reaction
I would certainly want to ask whether essences have to be analysed as properties, and also (more boldly) whether there might not be contingent essences.