Accession Number : AD0662710

Title :   BRAKE FLUID SEDIMENT CAUSED BY RUBBER CUPS.

Descriptive Note : Progress rept.,

Corporate Author : ARMY COATING AND CHEMICAL LAB ABERDEEN PROVING GROUND MD

Personal Author(s) : Counts,Jules B. ; Jordan,Charles B.

Report Date : DEC 1967

Pagination or Media Count : 25

Abstract : The object of the study was to extend the investigation of the parameters affecting the formation of sediment in brake fluids, particularly sediment caused by rubber cups. Parameters studied include sediment formation and solvency vs boiling point of brake fluid components, effect of water and water vapor, uniformity of cup manufacture, and effect of temperature on sediment formation. Brake fluids extract stearic acid from SBR cup formulations in current use and provide a medium for the formation of zinc stearate. Conventional high boiling fluids have less solvency for the zinc stearate that is formed. This factor promotes increased sediment formation. Possible remedies and solutions are discussed. (Author)

Descriptors :   (*HYDRAULIC FLUIDS, SEDIMENTATION), BRAKES, RUBBER SEALS, DETERIORATION, SYNTHETIC RUBBER, ZINC COMPOUNDS, OXIDES, STEARATES

Subject Categories : Lubricants and Hydraulic Fluids

Distribution Statement : APPROVED FOR PUBLIC RELEASE