Method for controlling viscosity of lubricating oils
US4529527A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 1984 |
| Grant date | Jul 16, 1985 |
| Priority date | — |
| Expiry date | May 14, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M2221/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The instant invention relates to an improved process for controlling the viscosity of organic liquids at low temperatures by incorporating in said liquid a minor amount of an ionic polymer and a cosolvent for the ionic groups of said polymer. The ionic polymer comprises a backbone which is substantially soluble in said organic liquid and pendant ionic groups which are substantially insoluble in said organic liquid, wherein such ionic polymer or terpolymer is formed from at least one acrylate or methacrylate monomer having at least eight carbon atoms and a minor portion of a sulfonate-containing monomer. A cosolvent is selected which will solubilize the pendant ionomeric groups and provide a reasonably homogeneous mixture of solvent, cosolvent and ionomeric polymer. The preferred compositions prepared by the method of the instant invention comprise an organic liquid having a solubility parameter of from 6 to 10.5 in combination with a sulfonated co- or terpolymer containing from 0.2 up to 10.0 mole percent ionic groups which has been neutralized by a basic material selected from Group IA, IIA, IB and IIB of the Periodic Table of the Elements (also lead, tin and antimony) and a nonvo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.