NEW YORK (S&P Global Ratings) April 26, 2017--S&P Global Ratings said today it assigned its 'A-' issue-level rating to E.I. DuPont de Nemours&Co.'s proposed unsecured notes due 2020 and placed it on CreditWatch with negative implications. We based the rating on preliminary terms and conditions. The company plans to use proceeds to finance a discretionary funding of the company's U.S. pension plan. The company anticipates that the pension funding will result in tax efficiencies. S&P Global Ratings believes the transaction will have a minimal impact on debt leverage. The pension funding will reduce debt-like liabilities to some extent. We anticipate that the resulting reduction of our adjusted debt plus anticipated tax efficiencies will likely offset the proposed increase