Oil-soluble polyester, additive for lubricating oil, and lubricating oil composition
US5780399A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Feb 12, 1996 |
| Grant date | Jul 14, 1998 |
| Priority date | — |
| Expiry date | Feb 12, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B2075/025
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An oil-soluble polyester having a weight average molecular weight of 10,000 to 1 000,000, which is a polycondensate prepared by polycondensing the following ingredients (A), (B) and (C): PA1 (A) a divalent higher carboxylic acid ingredient, PA1 (B) a divalent alcohol ingredient comprising a glycol represented by the following formula: EQU HO--CH.sub.2 --CR.sup.1 R.sup.2 --CH.sub.2 --OH wherein R.sup.1 and R.sup.2 represent a alkyl group, and the sum of carbon numbers in R.sup.1 and R.sup.2 is at least three, and PA1 (C) 0.1 to 15% by mole, based on the total of ingredients (A) and (B), of at least one multi-valent ingredient selected from a carboxylic acid with a valency of at least three and an alcohol with a valency of at least three. This oil-soluble polyester is useful as an additive for a lubricating oil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.