Equivalent Brand: Dow Corning 702
Diffusion Pump Oil RJ-272 is a kind of general-purpose oil designed for fast pumping of large volumes of gas. It is used to produce vacuums in the range of 10 to 10 torr. It possesses excellent heat-stability, good resistance to oxidation and radiation. Its vapour pressure is very low under room temperature, and changes sharply with the variation of temperature.


Technical Index
Property Specification
Chemical composition Mixed phenylmethyl-dimethyl cyclosiloxane
Ultimate Vacuum, torr
(untrapped) 10

Saturated Vapor Pressure, torr 1 10

Specific Gravity 1.08
Viscosity (25¡ãC) mm2/s 40¡À3
Flash Point ¡ãC 193~195
Refractive Index 25¡ãC 1.51-1.53
Molecular Description -

Applications
Diffusion Pump Oil RJ-272 can be used in variety of applications, including:

Electrical and electronics industry
•, TV tubes, fluorescent tubes, cathode ray tubes
•, ordinary bulbs
•, capacitors
•, rectifier metallised film vacuum system
Optical industry
•, surface improvements
•, anti reflective coatings
•, optical filters and mirrors
Metallurgy industry
•, high-vacuum furnaces
•, melting, degassing and sintering refractory metals, thick-film deposition
Plastics industry
•, surface improvements
•, mirror coatings
•, protective coatings
•, film coatings Other industries
•, processing metals and fuels
•, accelerators
•, molecular plants
•, R & D plants
•, mass spectrometry
Others
Be used as transmission fluid in high-temperature carriers and various instruments.

Package, Transportation & Storage
Diffusion Pump Oil RJ-274 is available in 5kg plastic drums, 25kg plastic drums, 25kg Iron drums or 200kg Iron drums.

Transport as non-hazardous chemicals, keeping away from rain and sunlight.

Shelf life: 2 years.