Azeotropic solvent composition
US4973421A · kind A · utility
5Cited by
11References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 18, 1989 |
| Grant date | Nov 27, 1990 |
| Priority date | — |
| Expiry date | Jan 18, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23G5/02819
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An azeotropic solvent composition which comprises an azeotropic mixture of 77% by weight of Flon-113 and 23% by weight of cyclopentane. The composition can decrease the amount of 1,1,2-trichloro-1,2,2-trifluoroethane excellent in power for dissolving fats and oil, grease, and particularly, waxes used for temporarily fixing silicon wafers, quartz, ceramics without erosion of materials made of plastics and rubbers, and it is easy to control the liquid composition and easy to recover and reuse the composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.