mecanim animation while timescale is zero

Hi there,
In pause menu, we set timescale to zero. It causes severe problem when we want some sprite animations for buttons. I am using mecanim for GUI sprite animations. So when I go to pause menu, every animation just stops. I do not want that. I want every animation in pause menu to play, even though timescale is zero. Is there any solution for this problem?
Thanks.

58561-screen-shot-2015-11-21-at-35537-pm.png