Functional fluids
US6436882B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 29, 2001 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Jun 29, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M135/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A functional fluid composition comprising a mixture of:(a) at least one functional fluid base stock; 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 and 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.