Aircraft deicing/anti-icing fluids thickened by associative polymers
US5708068A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 1995 |
| Grant date | Jan 13, 1998 |
| Priority date | — |
| Expiry date | Jan 16, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/053
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A glycol- and/or glycerin-based "universal" aircraft fluid (i.e., usable as any of Type I, II, III, or IV fluids), and having good resistance to degradation of viscosity and other critical properties caused by exposure to heat and/or shear, is disclosed. The fluid may optionally be prepared as a concentrate, and thereafter significantly diluted in the field for diverse uses. The improved performance is achieved by neutralizing a latex of a hydrophobe-containing, polymeric thickener with a base, preferably an alkali metal hydroxide, and preferably in combination with a weak base, such as a salt of a weak acid, and a surfactant which associates with the thickener.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.