Patent ID: 6436882
Filing Date: 2002-08-20
Classification: C10M

Abstract:
A functional fluid composition comprising a mixture of:(a) at least one functional fluid base component; and (b) an additive package comprising at least one derivative of a mono-, di-, or poly-alkylated naphthalenesulfonic acid selected from the group consisting of: (i) neutral metal salts of said mono-, di-, and poly-alkylated naphthalenesulfonic acids; (ii) basic metal salts of said mono-, di-, and poly-alkylated naphthalenesulfonic acids; (iii) amine salts of said mono-, di-, and poly-alkylated naphthalenesulfonic acids; and (iv) esters of said mono-, di-, and poly-alkylated naphthalenesulfonic acids; wherein the mono-, di-, and poly-alkylated naphthalenesulfonic acids are represented by formula (I):wherein R1, R2, R3 and R4 are individually selected from the group consisting of hydrogen or essentially linear hydrocarbyl groups having about 10 to about 14 carbon atoms; and wherein l, m, n and p are integers from 0 to 4 and the sum of l+m+n+p is at least 1; and wherein R1, R2, R3, or R4 is a hydrogen where either l, m, n, or p is 0; said concentration of the at least one derivative is sufficient so that the functional fluid composition has effective rust- and corrosion-inhibiting properties, wet filterability performance and effective demulsibility.