Detergent additives for lubricating oil compositions

Details Detergent additives for lubricating oil compositions Detergent additives for lubricating oil compositions

2005-06-09

2010-12-14

Caldarola, Glenn A (Department: 1771)

Solid anti-friction devices, materials therefor, lubricant or se

Lubricants or separants for moving solid surfaces and...

Organic oxygen compound

C508S568000

Reexamination Certificate

active

07851421

ABSTRACT:
An oil-soluble hydrocarbyl phenol aldehyde condensate having the following structure:wherein n is 0 to 10, preferably 1 to 8, more preferably 2 to 6, and most preferably 3 to 5; Y is a divalent bridging group, and is preferably a hydrocarbyl group, preferably having from 1 to 4 carbon atoms; and R is a hydrocarbyl group having from 4 to 30, preferably 8 to 18, and most preferably 9 to 15 carbon atoms. The oil-soluble hydrocarbyl phenol aldehyde condensate has a weight average molecular weight (Mw) of 1250 to 1680, as measured by MALDI-TOF (Matrix Assisted Laser Desorption Ionization-Time of Flight) mass spectrometry.

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patent: 2006/0046941 (2006-03-01), Chambard et al.
XP007124476 “Methylene-bridged alkyl phenols”, Anonymous, Jun. 1999 Research Disclosure, Kenneth Mason Publications, Hampshire, GB.

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