Method and composition for retarding water evaporation
US4250140A · kind A · utility
9Cited by
5References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 27, 1979 |
| Grant date | Feb 10, 1981 |
| Priority date | — |
| Expiry date | Apr 27, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J19/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method and composition for forming a thin film of evaporation retarding agent upon a water surface by applying to the water, solid macroscopic particles of a saturated, aliphatic, interface-active hydrocarbon in solid solution with a spreading agent, e.g., a polyethylene glycol, that is soluble in both water and the hydrocarbon. Preferably, the particles are admixed with solid macroscopic particles of a filler material capable of generating a gas upon contact with water and compacted into a tablet, pellet or other solid unitary form for application to a water surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.