It's possible that your husband will come around eventually. Not that you're going to come home one day and find he's installed a dungeon in the basement, but that he will like the idea of being your master and want to explore that further. From the way you phrased it, at least, he certainly feels possessive towards you, which might be a start.

Everyone's experience will vary, of course, but in my own relationship, that was how it worked out. I told him when we were engaged that I was interested in BDSM, and his initial reaction was "I can't hurt you. I can't hit you. I would be ok with tying your wrists, but that's about it." Because of his personal history, his strongest reaction came from his fear of being abusive. It took him a few months to get used to the idea enough to realize that he was actually really excited by it, and that being a loving Dominant is not the same as being an abuser (although that is an issue we still struggle with at times).

If you think that you have a chance to convince him (say, if you've noticed that he has some dominant tendencies), don't push it or act like he's disappointing you if it doesn't work out. Instead, show him how BDSM can be part of things that he enjoys. In my experience, the biggest turn-off for most guys is feeling pressured. If your previous experiments didn't work, it might have just been because of that.

The other thing that might work, but only if you are bi or bi curious, is finding a female Domme to play with, with your husband's permission -- a lot of men don't see their wife being with another woman as quite as bad as being with another guy. Especially if they get to watch.