Sodium carboxymethyl derivatives of polyoxyalkylene glycols, their production, and use in functional fluids
US4721579A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 15, 1980 |
| Grant date | Jan 26, 1988 |
| Priority date | — |
| Expiry date | Aug 15, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2050/01
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A new type of ionic thickener for water-based products including functional fluids such as hydraulic fluids, cosmetic emulsions, etc. These new thickeners are prepared from polyoxyalklylene glycols, higher alkyl monoepoxides, lower alkyl monohalo lower alkyl carboxylates, and alkali metal hydroxide. These novel thickeners are generally characterized by the following formula: ##STR1## wherein R is a methylene or lower polymethylene group, R' is a higher alkyl group and R" is selected from the group consisting of oxyethylene groups and heteric or block copolymer mixtures of oxyethylene and other lower oxyalkylene groups, said copolymer containing at least 75 percent oxyethylene groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.