US PATENT SUBCLASS 508 / 391
.~.~.~ Overbased or carbonated sulfonates


Current as of: June, 1999
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508 /   HD   SOLID ANTI-FRICTION DEVICES, MATERIALS THEREFOR, LUBRICANT OR SEPARATE COMPOSITIONS FOR MOVING SOLID SURFACES, AND MISCELLANEOUS MINERAL OIL COMPOSITIONS

110  DF  LUBRICANTS OR SEPARANTS FOR MOVING SOLID SURFACES AND MISCELLANEOUS MINERAL OIL COMPOSITIONS (E.G., WATER CONTAINING, ETC.) {53}
388  DF  .~ Organic sulfur compound, wherein the sulfur is single bonded directly to oxygen (e.g., sulfites, etc.) {2}
390  DF  .~.~ The sulfur is part of an -O-S(=O)(=O)- group (i.e., sulfonates) {12}
391.~.~.~ Overbased or carbonated sulfonates {7}
392  DF  .~.~.~.~> Prepared by addition of carbon dioxide, carbonic acid, or salt thereof to a reaction mixture containing alkylphenol, substituted alkylphenol, or salt thereof and sulfonic acid or salt thereof
393  DF  .~.~.~.~> Prepared by chemical reaction of existing overbased sulfonate in the absence of additional base (e.g., converting overbased sulfonate to non-newtonian or thixotropic composition; further reacting overbased sulfonate with carboxylic acid, etc.)
394  DF  .~.~.~.~> Prepared with, or in the presence of, a halogen-containing material
395  DF  .~.~.~.~> Prepared by addition of carbon dioxide, carbonic acid, or salt thereof to a reaction mixture prior to addition of sulfonic acid or salt thereof (i.e., carbonating reaction mixture prior to addition of sulfonic acid or salt thereof)
396  DF  .~.~.~.~> Prepared with, or in the presence of, a nitrogen-containing material {1}
398  DF  .~.~.~.~> With nonhydrocarbon organic compound in addition to those remaining from overbasing process (e.g., antioxidants, VI improvers, etc.) {2}
401  DF  .~.~.~.~> Prepared by addition of carbon dioxide, carbonic acid, or salt thereof {1}


DEFINITION

Classification: 508/391

Overbased or carbonated sulfonates:

(under subclass 390) Compositions wherein the organic -S(=O)(=O)O- compound is an overbased or carbonated sulfonic acid.

(1) Note. An overbased compound herein is one in which an amount of metal (e.g., Mg, Ca, Ba, Sr) is present which is greater than the stoichiometric amount of metal which would be present if the sulfonic acid were completely neutralized.

(2) Note. A carbonated compound herein is the complex resulting from the reaction of carbon dioxide with metal sulfonates.