DuPont Performance Elastomers, LLC manufactures and supplies general purpose and specialty elastomer products. Neoprene is the generic name of an artificial rubber developed by the DuPont Company in 1930 to 1931. The records consist of a mix of historical and contemporary documents assembled to celebrate the fiftieth anniversary of neoprene in 1981, enlarged to cover the seventieth anniversary in 2001, and kept up with subsequent additions.

The Thiokol Chemical Corporation was formed in 1929 for the production of synthetic rubber and other related chemicals. Headquartered in Trenton, New Jersey, the company moved into defense contracting in the 1940s and, after the Second World War, their product further evolved as both a rocket fuel and a binding agent in one. Thiokol eventually began the manufacture of rocket engines and grew into one of the world’s largest producers of solid rocket motors for the aerospace and defense industries. The records largely consist of documents related to the history and development of Thiokol, annual reports, information on the development of rockets, as well as publications relating to the aerospace industry.