Sep.23 (GMM) Singapore winner Sebastian Vettel was summoned to the stewards late on Sunday night.
And Button told reporters: "I closed my eyes, I didn't know what was going to happen.
"Seb is in control of the pace but when someone accelerates, you don't expect them to brake (immediately). I was very close to him and locked up the front but managed to avoid him."
Button was also summoned to the stewards.
Meanwhile, McLaren boss Martin Whitmarsh has hinted Button may succumb to team orders as teammate Lewis Hamilton chases the 2012 title.
"Jenson has had a conversation with me, he initiated it," he told the BBC.
"He's an immensely competitive individual, but he's a team player. Things that happen in the future will come from within him. I'll never ask and I don't want to ask.
"If he chooses to do soemething in the best interest of the team, that's up to him."