Kullman said that, over the past year, DuPont executives have weighed what to do with the performance chemicals unit, balancing its cash generation against its cyclicality and volatility.
"We have concluded that separation, specifically by way of a tax-free spinoff, will create the most value for our shareholders," she said.
DuPont's announcement came after the close of regular-session trading on the New York Stock Exchange, which saw the company's shares rise almost 2 percent to $61.38. In after-hours trading, Wilmington-based DuPont's stock was up another 3 percent at $63.24.
DuPont management has said it hopes to complete the spinoff within 18 months, with all the equity in the new public entity being owned by DuPont shareholders.
Officials said the spinoff will allow investors a choice between the cash potential of the performance chemicals business and the growth potential of the parent company.
"DuPont will benefit from more stable, predictable earnings and cash flow," said Chief Financial Officer Nick Fanandakis.
The spinoff also will allow DuPont to intensify its focus on its more science-driven business segments: agriculture and nutrition, industrial biosciences and advanced materials.
At the same time, DuPont officials says the performance chemicals unit is well positioned to be a highly competitive stand-alone company
"This is going to be a world-class global chemical company," Fanandakis said.
The performance chemicals spinoff is the latest in series of strategic moves by DuPont in recent years, including the acquisition of the enzyme and specialty food ingredients businesses of Danish company Danisco, and the divestiture of DuPont's performance coatings segment earlier this year.