Edward J. Detgen, 66, a retired vice president for national affairs of the Owens-Corning Fiberglass Corp., died of cancer Monday at his home in Bethesda.

Mr. Detgen was born in New York City. He moved to Washington to attend Georgetown University, from which he graduated in 1934. A year later, he went to work in the specialties division of the Department of Commerce and remained there until 1943, when he moved to the War Production Board as director of the containers division.

In 1945, he joined Owens-Corning in Toledo. He was made a vice president in 1952 and vice president and general manager of the home products division in 1959. He was transferred to Washington in 1966 as vice president for national affairs. he retired in 1976.

Mr. Detgen was a former director of the Producers' Council, a building material assocation, a trustee of the National Housing Center of the National Association of Home Builders, and a member of the National Home Improvement Council, the Accoustical Materials Association and the National Mineral Wool Association.

In 1975, he was elected chairman of the Industrial Energy Users Forum, a Washington group. He also was a member of the Washington Industrial Roundtable and the Business Roundtable.

He was a member of St. Bartholomew's Catholic Church in Bethesda and of the Chevy Chase Club.

Mr. Detgen's survivors include his wife, the former Benedicta Gannon, of the home in Bethesda; two sons, John Peter and Edward J. Jr., both of Toledo; two daughters, Mildred Davis, of Chevy Chase, and Virginia Detgen, of Washington; a brother, John, and a sister, Dorothy Bannigan, both of Greensboro, N.C., and eight grandchildren.

The family suggests that expression of sympathy be in the form of contributions to the American Cancer Society.