Cleaning composition based on 1,1,1,2,2-pentafluoro-3,3-dichloropropane and methyl tert-butyl ether
US5102563A · kind A · utility
8Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 10, 1991 |
| Grant date | Apr 7, 1992 |
| Priority date | — |
| Expiry date | May 10, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23G5/02851
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
For replacing cleaning compositions based on 1,1,2-trichloro-1,2,2-trifluoroethane (F113), the invention provides a composition comprising 55 to 80% by weight of 1,1,1,2,2-pentalfuoro-3,3-dichloropropane (225ca) and 20 to 45% by weight of methyl tert-butyl ether. These two compounds form a negative azeotrope (b.p.=59.9.degree. C. at atmospheric pressure). The composition, which may be stabilized, can be used for cleaning solid surfaces, in particular for removing flux from printed circuits and for degreasing mechanical parts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.