Lubricating properties of ashless thiophosphates and dithiophosphates based on isononylphenol

Journal Article · Fri Jul 01 04:00:00 EDT 1994 · Chemistry and Technology of Fuels and Oils

OSTI ID:191811

Tsygankova, O E; Parfenova, V A; Belov, P S

Nitrogen-containing thiophosphates and dithiophosphates that are prepared from commercial isooctylphenol manifest antiwear properties in mineral oils. The structure of the hydrocarbon radical is a major factor in determining the effectiveness of these additives. Isooctylphenol that is obtained by alkylating phenol with polymer distillate in the presence of the cation exchange resin KU-2-8 as a catalyst is a wide fraction distilling at 100-180{degrees}C under a residual pressure of 667 Pa; dithiophosphate additives prepared from this material consist of mixed dithiophosphates with monosubstituted and partially substituted C{sub 4}-C{sub 16} alkylphenyl radicals. Because of the nonimiformity of structure of such additives, they are readily soluble and highly effective in naphthenic-aromatic base mineral oils. However, the presence of phenol and butylphenols in the alkylphenol has deleterious effects on the additive quality, including a reduction of its solubility in mineral oils. In order to expand the raw material base and improve the additive quality, we have synthesized and investigated certain ashless additives containing sulfur, phosphorus, and nitrogen, prepared with isononylphenol. This isononylphenol distills within the 120-130{degrees}C interval at 400 Pa; it consists of a mixture of p-isononylphenols in which the iso-C{sub 9} alkyl groups vary in structure. We have carried out a comparison of the functional properties of thiophosphate and dithiophosphate additives based on isooctylphenol and isononylphenol. As antiwear and antifriction additives for M-11 base oil, we investigated diethylenetriamine salts of dithiophosphoric acids based on isononylphenol (A) and isooctylphenol (A{prime}), and also amidothiophosphates based on isononylphenol (B, C) and isooctylphenol (ATF additive). The ability of these additives to reduce the wear of rubbing pairs was determined.

• OSTI ID: 191811
• Journal Information: Chemistry and Technology of Fuels and Oils, Journal Name: Chemistry and Technology of Fuels and Oils Journal Issue: 11-12 Vol. 29; ISSN CTFOAK; ISSN 0009-3092
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
36 MATERIALS SCIENCE
ALKYLATION
CHEMICAL PROPERTIES
DISTILLATES
FRICTION
LUBRICATING PROPERTIES
MOLECULAR STRUCTURE
PHENOL
PHENOLS
PHOSPHATES
SALTS
SOLUBILITY
STEELS
SULFUR COMPOUNDS
TEMPERATURE DEPENDENCE
WEAR