Facebook & Business = Link?

1. You need to go to www.facebook.com/username/
2. Select page from the drop-down list
3. Dial the desired page url

it is suspected that you do not understand the difference between user, group and page on FB.
In short, for your purpose appropriate page (page). Just log in on FB, go to www.facebook.com/pages/, select "Add page". Once on your page signs up 20 people (don't remember exactly so), you will be able to change the page title to the text that is your product www.facebook.com/username/

Thank you very much! Understood and already implemented :-)))