The pair's cars made contact more than once, with the Mexican damaging his front wing by driving into the back of the 2009 world champion.
The Briton told reporters: "I was very vocal on the radio, emotions were running high, but I would say exactly the same again. The racing was great out there. The only person that wasn't was [Perez].
"He was too aggressive, I would say. At 300kph, you don't expect your teammate to come alongside you and bang wheels with you.
"It was a bit of a surprise and I'm probably not the only one that feels like that. That's something you do in karting and normally you grow out of it."
Perez went on to finish sixth, while Button came 10th.