Cleaning method with solvent
US5667594A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 1994 |
| Grant date | Sep 16, 1997 |
| Priority date | — |
| Expiry date | Mar 14, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D7/3281
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A cleaning solvent composition that is made by either blending aliphatic fluorohydrocarbon as expressed by the general formula EQU C.sub.n F.sub.m H.sub.2n+2-m (wherein, n and m are a positive integral numbers, being 4.ltoreq.n.ltoreq.6, 2n-3.ltoreq.m<2n+2 respectively) or blending a mixture of this aliphatic fluorohydrocarbon and alcohol having a carbon number of 1 to 4 with lactam and/or carboxylic acid amide, tertiary amines, or alcohol having ether linkage and/or amino linkage within its molecules. A cleaning process wherein an object is dipped into the said composition to remove dirty component, then rinsed with a mixture of the said aliphatic fluorohydrocarbon and the said alcohol having a carbon number of 1 to 4, and thereafter the object is steam cleaned with the said mixture when necessity arises. The use of the cleaning solvent composition, which does not destroy the ozone, is non-combustible, and shows an excellent cleaning effect, enables the object to be rinsed and steam cleaned in a nonaqueous system and allows the subsequent drying process to be simplified, and thus leads to a cleaned object free of residue and stains.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.