Adds share move in paragraphs 1-2. Adds broker quote paragraph 3. Adds chart reflecting AkzoNobel share price trend.

May 27 (Reuters) - Dulux paint maker AkzoNobel AKZO.AS has rejected a cash takeover offer of €73 ($85) per share from rivals Nippon Paint 4612.T and Sherwin-Williams SHW.N, the Dutch company said on Wednesday, sending its shares 14% higher.

The offer price represents a premium of 39% to AkzoNobel's last closing price of €52.52 per share. The shares jumped 14.4% to around €60 by 0731 GMT, on track for their best trading day since October 2008 if the gains hold.

"Akzo considers its own merger proposal with Axalta AXTA.N to be superior and pushes ahead on this track," brokerage KBC said in a note to investors.

AkzoNobel said the non-binding proposal undervalued its business and lacked deal certainty, adding that its board continued to recommend the planned merger with Axalta.

Under the proposal, Nippon Paint would have acquired AkzoNobel and retained its decorative paints and industrial coatings businesses, while selling its automotive, marine and powder coatings divisions to Sherwin-Williams.

($1 = 0.8593 euros)