The first thing I'd say is that while this must be stressful there is no point worrying about what you can't control. It follows then that you must feel that changing your current situation (or the politics surrounding it) is not within your control - as your Boss is ignoring you. If that is true (and it is well worth considering if that is the case) then the question here is what do you want to achieve? If it is learning a new technology - then that's great, use the time to learn it.

I have previously found myself isolated within a large compnay and used the time to learn. In my case the situation resolved when the politics changed (change of leadership) and I was re-engaged.

I've found it helpful to have a goal beyond technology - so learning a new technology would be a means to another business (social or political) outcome. As I'm sure you've experienced, technologies come and go.