Quasi-azeotropic mixture based on 1,1,1,3,3-pentafluorobutane, methylene chloride and methanol for the treatment of solid surfaces
US6489277B1 · kind B1 · utility
4Cited by
5References
8Claims
0Family size
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Key dates
| Filing date | Sep 26, 2000 |
| Grant date | Dec 3, 2002 |
| Priority date | — |
| Expiry date | Sep 26, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23G5/02803
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
In order to replace 1,1,2-trichloro-1,2,2-trifluoroethane and 1,1-dichloro-1-fluoroethane in compositions for treating solid surfaces (in particular defluxing), the invention proposes the use of a quasi-azeotropic mixture containing, by weight, from 75 to 95% of 1,1,1,3,3-pentafluorobutane, from 1 to 15% of methylene chloride and from 1 to 10% of methanol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.