Low Compression Set Fluorocarbon Elastomeric Seal Materials 650313

The hydrofluorocarbon elastomers have been a bright spot in recent elastomer technology, particularly in the area of high temperature hydraulic seals. However, significant limitations have existed: poor low temperature characteristics, and poor compression set at elevated temperatures. This latter deficiency severely limits the usefulness of these materials as seals at temperatures well below their thermal capabilities. The paper is concerned with presenting the latest advances in the experimental compounding directed toward improving the compression set of these elastomers. Compound recipes for low compression set and the data for short and long term aging at room temperatures and 400°F will be presented.