E.i. Dupont De Nemours and Company

Dupont Safety & Construction, Inc.

Peter A Brown

Weiming Qiu

Joseph D Trentacosta

Michael W Cobb

Sharlene Renee Williams

Justin W Chan

Andrew Tadros

Mark Gary Weinberg

Described is the preparation of sulfonated polyoxadiazole polymers with a high degree of sulfonation and good flammability properties. The polymers are useful in articles such as fibers.

Preparation of sulfonated naphthalene polyoxadiazoles polymers

Dielectric fluids are provided, the dielectric fluids comprising a mixture of polyol esters derived from a reaction of a) a polyol comprising pentaerythritol, trimethylolpropane, neopentyl glycol, or combinations thereof, and b) a mixture of fatty acid esters derived from a high oleic soybean oil comprising fatty acid moieties, wherein the high oleic soybean oil has a C18:1 content of greater than 65% of the fatty acid moieties in the oil, and a combined C18:2 and C18:3 content of less than 20% of the fatty acid moieties in the oil. Also provided are electrical apparatuses comprising the dielectric fluids, and processes for preparing the mixtures of polyol esters.

Dielectric fluids comprising polyol esters

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Wilmington, DE, United States of America

Peter A Brown