METHOD OF RESISTING RADIATION DAMAGE TO ORGANIC FLUIDS AND COMPOSITIONS THEREFOR

Patent · Wed Aug 17 04:00:00 EDT 1960

OSTI ID:4162490

Additives for improving the radiation resistance of organic fluids and lubricants are discussed. Two new classes of additives were found to reduce markedly the tendency of lubricants to thicken and become viscous with irradiation. Alkyl styrene polymers, especially those with lower alkl substituents, have a beneficial effect on the viscosity change with irradiation which is attributed to their ability to absorb radiation energy without breaking down. Usually the alkl group is substituted in the alpha position to produce oil-solubele polymers, and their concentration in the mixture can be 10 to 40 % of the base oil. Viscosity-index improvers that decrease the viscosity when irradiated include polymerized acrylate esters, methacrylate derivatives having long-chain alkyl substituents, styrene and olefin copolymers, liquid polymers of iso-olefins, polymerized vinyl ethers, and polyethers. Additives are usually employed in concentrations of 2 to 20 % of the base oil. The role of other additives, e.g., antioxidants, metal deactivators, and free-radical scavengers, and the kind of oils that can be improved by the above additives are discussed; synthetic lubricating oils, e.g., alkyl aromatics, are preferred. (D.L.C.)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-14-023384
• OSTI ID: 4162490
• Report Number(s): GB 844781
• Country of Publication: United Kingdom
• Language: English

Related Subjects

ABSORPTION
ACRYLATES
ADDITIVES
ALKENES
ALKYL RADICALS
ANTIOXIDANTS
AROMATIC HYDROCARBONS
AROMATICS
DECOMPOSITION
ESTERS
ETHERS
FLUIDS
FREE RADICALS
ISOMERS
LIQUIDS
LUBRICANTS
LUBRICATION
METALS, CERAMICS, AND OTHER MATERIALS
METHACRYLATES
MIXING
OILS
ORGANIC COMPOUNDS
OXIDATION
POLYETHERS
POLYMERS
PRECIPITATION
QUANTITY RATIO
RADIATION EFFECTS
SOLUBILITY
STYRENE
VINYL RADICALS
VISCOSITY