Antiwear Additives, Wear Studies on Chemical Addition Agents for Imparting an Effective Lubricating Response in Polysiloxane (Silicone) Fluids
Abstract
An additive package based on chlorendate and thiadiazole molecular structures has been discovered which imparts antiwear properties to tetrachlorophenylmethyl siloxane fluids that have been previously unattainable. For the first time a polysiloxane based fluid possessing antiwear properties comparable to such outstanding lubricants as petroleum oils, synthetic hydrocarbons, diesters and phosphate esters was formulated. In addition, a detailed analysis of the modification of friction surfaces (steel-on-steel) using organophosphate addition agents in polysiloxane fluids has refuted the commonly held belief that the inability of antiwear additives to function in polysiloxane media at low concentrations is due to the fact that the additive is substantially excluded from the surface. Evidence is presented to show that additive-surface interactions are indeed prevalent resulting in an antagonistic (pro-wear) action. In one specific instance depending on load and concentration a beneficial lubricating response is achieved with a tetrachlorophenylmethyl siloxane fluid containing alkyl-phosphate derivatives. The use of organo- phosphates as antiwear agents in polysiloxane has previously proved unfruitful, therefore, these results represent a significant area for further study.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 02, 1976
- Accession Number
- ADA033527
Entities
People
- Alfeo A. Conte Jr.
- James L. Hammond
Organizations
- Naval Air Warfare Center Warminster