Am I being unreasonable?

First off, I'm a SAHM. My child is 15 months old. My husband and I have been together almost 3 years and have been married almost 2 years. My husband works around 60 hours a week. So, last night we got in a huge fight because I told him that he doesn't help with our child as much. He doesn't want to change diapers, doesn't want to give baths, doesn't help feed her. I do ALL of it. Now, obviously during the day while he's at work, I do all of that and i love taking care of our child, but I feel like when he is home, he can change a diaper and give a bath every now and then. I don't expect it every day, but I feel like this is OUR child and we should both help with her. He thinks that because he works and buys everything that it's my job to take care of the house and do all the diaper changes, etc. I don't mind doing all the housework and taking care of our child, but I feel like he should help with her sometimes. And yes, I have asked him before to help, he always says "heck no I don't wanna change that diaper "or "no, I'm not giving her a bath".He's home on the weekends and still won't help with our baby. He'll actually smell her poopy diaper first, then tells me she pooped instead of just taking her and changing her himself. Am I wrong? Am I being unreasonable? I just want a little help every now and then.