Demulsifiers for oil soluble polyalkylene glycol lubricants
US10160928B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2014 |
| Grant date | Dec 25, 2018 |
| Priority date | — |
| Expiry date | Oct 29, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2030/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A composition contains a propylene oxide/butylene oxide copolymer with an ethylene oxide/propylene oxide copolymer where the propylene oxide/butylene oxide copolymer has a concentration of propylene oxide moieties in a range of 25-75 wt % based on total of propylene oxide and butylene oxide moieties, the ethylene oxide/propylene oxide copolymer has a concentration of ethylene oxide moieties that is greater than zero and up to 60 wt % based on the total weight of ethylene oxide and propylene oxide moieties, and wherein the concentration of the ethylene oxide/propylene oxide copolymer is greater than zero and one wt % or less based on the total weight of propylene oxide/butylene oxide and ethylene oxide/propylene oxide copolymers and the ethylene oxide/propylene oxide copolymer is a reverse copolymer or a random copolymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.