Hi, Hope, and welcome!
I've worked in the domestic violence field for many years, and the first thing you should keep in mind is that the abuse is a completely separate issue from the alcoholism. The alcohol lowers inhibitions, and may give him an excuse, but most alcoholics re not abusers and most abusers are not alcoholics.
Much of the advice about dealing with an alcoholic partner (e.g., detaching) can be dangerous when you are dealing with an abuser. If you want a good, concrete first step to take, I highly recommend that you call your local women's shelter and speak with an advocate. They can help you with safety planning and any other assistance you need. Nobody will make you do anything you aren't ready to do, but they can help you sort out your options and plan a safe exit when you are ready to do that.
The alcoholism in a parent is bad enough for kids, but the abuse is even worse in terms of lasting damage.
Texas has some great resources for victims of abuse. Here's one of the best I know of:
Genesis. They are terrific.