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Polymers can be hardened by a process known as vulcanization (curing of elastomers), a chemical process that involves a curing agent and heat.

According to Wikipedia, for the vulcanization of rubber, sulfur is used, whilst for neoprene (polychloroprene) metal oxides are used (MgO, ZnO and somtimes Pb3O4).

I wonder if a polymer coating (assumed neoprene) that was altered by cleaning alcohol (isopropanol) and became tacky/sticky, can be hardened again by applying a suitable hardening agent and heating with a simple temperature controlled hot air station. If yes, which the temperature ranges and which precautions?

Envisaged application: restoring the coating of a laptop palmrest that became tacky/sticky.

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    $\begingroup$ Haha, yes, hypothetically. I recommend you split this in three questions: what is that polymer on laptop palmrests and similar applications that turns sticky? What happened to the same when it turned sticky? And lastly how can I harden it again? $\endgroup$
    – Karl
    Commented Oct 18, 2021 at 17:41
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    $\begingroup$ Just buy a new palmrest... $\endgroup$
    – Mithoron
    Commented Oct 18, 2021 at 21:41

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