At the very least I think I should be paid to learn it if I have to teach it.

What if you reframed how you approach your work role? The company is now an informal research lab-- you serve as its director. In that capacity you develop cutting-edge stuff. You also coach and mentor people (including the boss) in a collaborative team style.

Incidentally, do keep a journal of what you contribute in this area. Extremely useful at review time. Ultimately, this makes you irreplaceable.