Sizing methods and compositions for carbon dioxide dry cleaning
US6280481A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1999 |
| Grant date | Aug 28, 2001 |
| Priority date | — |
| Expiry date | Jul 21, 2019 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06L1/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for dry-cleaning articles such as fabrics and clothing in carbon dioxide while concurrently applying a sizing agent to the articles comprises contacting an article to be cleaned with a liquid dry cleaning composition for a time sufficient to clean the fabric. The liquid dry-cleaning composition comprises a mixture of carbon dioxide, a surfactant, a sizing agent. An organic co-solvent is preferably included. After the contacting step, the article is separated from the liquid dry cleaning composition. The method is preferably carried out at ambient temperature. Preferred sizing agents are low molecular weight hydrocarbon resins. The surfactant is preferably one that does not contain a CO.sub.2 -philic group. The organic co-solvent is preferably an alkane and has a flash point above 140.degree. F.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.