Method of dry cleaning fabrics using densified liquid carbon dioxide
US5683473A · kind A · utility
111Cited by
10References
10Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 20, 1996 |
| Grant date | Nov 4, 1997 |
| Priority date | — |
| Expiry date | Aug 20, 2016 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06L4/17
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of dry cleaning fabrics using a dry cleaning system is described. The system comprises densified carbon dioxide, preferably in a liquid phase, and a selected surfactant which is soluble in the densified CO.sub.2. The surfactant has a polysiloxane, a branched polyalkylene oxide or a halocarbon group which is a functional CO.sub.2 -philic moiety connected to a CO.sub.2 -phobic functional moiety. The surfactant either exhibits an HLB of less than 15 or has a ratio of siloxyl to substituted siloxyl groups of greater than 0.5:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.