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US 12,600,919 B2Granted
Lubricating compositions
AssigneeSyensqo Specialty Polymers USA, LLC
InventorsChristine Hamon, Gaetano Calvaruso, Kelly D. Branham, Hong Chen
Life of this patent
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Abstract
The present patent application relates to the use of non fluorinated aromatic polymers as additives for fluorinated lubricants.
Claims12
A composition comprising:
- (A) from 99.9% to 65.0% by weight, based on 100% by weight of said composition, of at least one hydrogenated or (per) fluorinated oil, and
- (B) from 0.1% to 35.0% by weight, based on 100% by weight of said composition, of at least one aromatic polymer:
- having a melting point of at least 150° C. and
- being in the form of powder having an average particle size (d50) in the range from above 1 micrometer and up to 15 micrometers, as measured by laser diffraction particle size analysis as volume particle size distribution, and a surface area from 0.5 to less than 5 m2/g, as determined by gas adsorption using the BET method according to ISO 9277,
- wherein said at least one aromatic polymer is selected from the group consisting of:
- (a) poly(arylene sulphides) (PAS) polymer;
- (b) poly(phenylene oxides) (PPO) polymer;
- (c) poly(aryl ether ketone) (PAEK) polymer;
- and
- (d) poly(aryl ether sulfone) (PAES) polymer.
7 more elements
Dependencies are inferred from the claim text.