I read the answers here and they are great and make good points, but I'm still going to take my bet on it and say that you should send them as quick as possible.
Besides all the reasons for doing so that have been already mentioned (you can see them on Tiago Cardoso's answer), I'm going to say that since your project may be advancing directly after the meeting -- specially if there were action items assigned -- you take the risk of your notes being outdated at the moment they are sent.
I have had this problem myself, and while we all want our mails to be perfect, we also want our projects to run as quick as possible. When you get that velocity and your own emails start to need corrections and addendums so that whoever reads it understands what happened between the minute and the present moment, you realize that this is creating unnecessary work for you.
My suggestion is then to send your minutes as quick as possible. You don't need them to be perfect, but to be clear and easy to understand, as a good summary of what happened there.
PS: A reason for not doing it is to let yourself settle down and send a good outline of the meeting, specially if it happened to be agitated or controversial. I would say that the solution for this is to keep your professionalism and objectivity when sending them, rather than have it "happen" to you.